User manual

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Dual Measurement Multimeter

GDM-834X Series

USER MANUAL

GW INSTEK PART NO. 82DM-83420E01

ISO-9001 CERTIFIED MANUFACTURER

Summary of content (158 pages)

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Dual Measurement Multimeter GDM-834X Series USER MANUAL GW INSTEK PART NO.
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This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company. The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures at any time without notice. Good Will Instrument Co., Ltd. No.
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Table of Contents Table of Contents SAFETY INSTRUCTIONS .................................................. 5 GETTING STARTED ........................................................ 10 Characteristics .......................................... 11 Appearance ............................................... 14 Set Up ....................................................... 24 OPERATION .................................................................. 29 Basic Measurement Overview ...................
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GDM-834X Series User Manual Frequency/Period Input Jack Settings ........ 80 Compatibility Settings ............................... 81 Restore Factory Default Settings ............... 82 USB STORE .................................................................... 83 USB Store Overview .................................. 84 REMOTE CONTROL ...................................................... 101 Configure Remote Control Interface ........ 102 Return to Local Control ...........................
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Table of Contents SAFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow during operation and storage. Read the following before any operation to ensure your safety and to keep the instrument in the best possible condition. Safety Symbols These safety symbols may appear in this manual or on the instrument. WARNING Warning: Identifies conditions or practices that could result in injury or loss of life.
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GDM-834X Series User Manual Safety Guidelines General Guideline CAUTION  Make sure that the voltage input level does not exceed DC1000V/AC750V.  Make sure the current input level does not exceed 12A.  Do not place any heavy object on the instrument.  Avoid severe impact or rough handling that can lead to damaging the instrument.  Do not discharge static electricity to the instrument.  Use only mating connectors, not bare wires, for the terminals.
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SAFETY INSTRUCTIONS Power Supply WARNING Fuse WARNING Cleaning the Instrument Operation Environment  AC Input voltage: 100/120/220/240 V AC  50/60Hz  The power supply voltage should not fluctuate more than 10%.  Connect the protective grounding conductor of the AC power cord to an earth ground, to avoid electrical shock.  Fuse type: 0.125AT 100/120VAC 0.063AT 220/240 VAC  Make sure the correct type of fuse is installed before power up.
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GDM-834X Series User Manual (Note) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The GDM-8342/8341 falls under degree 2.  Pollution refers to “addition of foreign matter, solid, liquid, or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”.  Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence.  Pollution degree 2: Normally only non-conductive pollution occurs.
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SAFETY INSTRUCTIONS Power cord for the United Kingdom When using the unit in the United Kingdom, make sure the power cord meets the following safety instructions.
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GDM-834X Series User Manual GETTING STARTED This chapter describes the GDM-8342 and GDM-8341 multimeters in a nutshell, including accessories, and package contents, their main features and front / rear panel introduction. Characteristics ................................................................ 11 Accessories ................................................................ 12 Package Contents....................................................... 13 Appearance .....................................
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GETTING STARTED Characteristics The GDM-8342 and GDM-8341 are portable, dual-display digital multimeters suitable for a wide range of applications, such as production testing, research, and field verification. Performance Features Interface  DCV accuracy: 0.
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GDM-834X Series User Manual Accessories Standard Accessories Optional Accessories Download Part number Description 82DM-83420E01 User Manual CD 82DM-83421M01 Safety Instruction Sheet GTL-207 Test leads: 1x red, 1x black Part number Description 1040-8342020 GPIB (Factory installed, GDM-8342 only) GTL-246 USB Cable GTL-205 Temperature Probe Adapter with Thermal Coupling (Ktype) Name Description gdmvcp.inf (In GDM-834X USB driver USB DRIVER.
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GETTING STARTED Package Contents Check the contents before using the instrument.
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GDM-834X Series User Manual Appearance GDM-8342/8341 Front Panel Main Display DC/AC 0.5A Terminal, AMPS Fuse Holder VW Terminal GDM-8342 50000 Counts Dual Measurement Multimeter INPUT V CAT W 600V MAX MAX 0.5A POWER DC + AC DCI DCV ACI ACV dB W dBm TEMP / / Hz/P REL# MATH COMP INT/EXT USB STO REL MX/MN HOLD TRIG MENU LOCAL RANGE FUSE T0.
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GETTING STARTED V W Input CAT This terminal is used for all measurements except for DC/AC current measurements. INPUT Terminal V W V W 600V INPUT MAX 600V 0.5A CAT COM Terminal FUSE T0.5A 250V FUSE T0.5A 250V MAX MAX 0.5A 500Vpk MAX COM 1000V 750V MAX 12A MAX 500Vpk COM CAT 600V V MAX 12A MAX 0.5A AMPS Fuse Holder V FUSE T0.5A INPUT 250V MAX 500Vpk W 600V MAX MAX 0.5A DC/AC 12A FUSE Terminal T0.5A 250V Accepts ground (COM) line in all measurements.
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GDM-834X Series User Manual Measurement Keys The top row of measurement keys are used for basic DMM measurements such as voltage, current, resistance, capacitance and frequency. The bottom row of measurement functions are used for more advanced functions. Each key has a primary and secondary function. The secondary function is accessed in conjunction with the SHIFT key. Upper Measurement keys DCV Measures DC Voltage (page 33). DCI DCV DCI (SHIFT→DCV) ACV Measures DC Current (page 39).
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GETTING STARTED Resistance/ Continuity) W dB (SHIFT→ Ω/ ) / dB SHIFT EXIT Diode/ Capacitance dBm (SHIFT → Measures resistance or continuity, depending on the selected mode. See page 43 and 48, respectively. dB → W Tests diodes or measures capacitance, depending on the selected mode. See page 45 and 46, respectively. / dBm ) Hz/P SHIFT EXIT → TEMP (SHIFT → Hz/P) TEMP SHIFT EXIT LOCAL 2ND Measures dBm.
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GDM-834X Series User Manual Lower Measurement keys REL Measures the Relative value (page 67). REL# REL REL# (SHIFT→REL) MX/MN REL# SHIFT EXIT → Measures the Maximum or the Minimum value (page 66). MATH MX/MN MATH (SHIFT→ MX/MN) HOLD MATH SHIFT EXIT → TRIG COMP SHIFT EXIT → 18 HOLD INT/EXT SHIFT EXIT Activates the compare measurement function. See page 70. Triggers sample acquisition manually when the trigger is set to external triggering. See page 32.
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GETTING STARTED MENU Enters the configuration menu for System Settings, Measurement Settings, Temperature measurement settings, I/O settings and USB storage settings. See page 76 for the system menu. USB STO MENU USB STO (SHIFT→MENU) SHIFT/EXIT USB STO SHIFT EXIT SHIFT EXIT → MENU Logs measurement data to a USB drive. This function is only available for the GDM-8342. See page 83. When used as a SHIFT key, it is used to access the secondary functions associated with the measurement keys.
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GDM-834X Series User Manual Arrow Keys The arrow keys are used to navigate the menu system and edit values. RANGE The Up and Down arrow keys will also manually set the range for the voltage and current measurements. RANGE The Left and Right arrow keys will also toggle the refresh rate between the fast, medium and slow rates.
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GETTING STARTED Secondary Measurement Units Secondary Measurement function icons Function Status Icons Primary Display Displays the units for the secondary measurement function. Displays the secondary measurement function. Display status icons for operations/functions that are not linked to the primary or secondary functions. Displays the results of the primary measurement.
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GDM-834X Series User Manual Rear Panel Optional GPIB port (GDM-8342 only) LINE RATING GPIB 50 / 60 Hz 15VA MAX. Power Cord Socket 220VAC 240VAC 240 100VAC 120VAC 0.063AT 100 120 LINE 0.125AT 220 FUSE DISCONNECT POWER CORD AND TEST LEADS BEFORE REPLACING FUSE CALIBRATION USE ONLY WARNING TO AVOID SHOCK, SER.NO. LABEL REMOVE INPUTS BEFORE OPENING. USB Device Port, Calibration Port Fuse 0.125AT/0.
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GETTING STARTED Fuse Socket Holds the main fuse: 220 100 120 100/120 VAC: 0.125AT 220/240 VAC: 0.063AT 240 For fuse replacement details, see page 145. Calibration Port USB Device CALIBRATION USE ONLY Reserved for calibration purposes. For service technicians only. Type B USB port. This port is used for remote control.
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GDM-834X Series User Manual Set Up Tilting the Stand From the base of the handle, gently pull the handle out sideways and then rotate it to one of the following positions.
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GETTING STARTED Power Up Steps 1. Ensure the correct line voltage is lined up with the arrow on the fuse holder. If not, see page 145 to set the line voltage and fuse. 2. Connect the power cord to the AC voltage input. Note Make sure the ground connector on the power cord is connected to a safety ground. This will influence the measurement accuracy. 3. Push to turn on the main power switch on the front panel. ER POW 4.
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GDM-834X Series User Manual How to Use the Instrument Background The following section will introduce to you how to access the basic functions on the DMM as well as how to navigate the menu system and the edit parameter values. Using the Function keys Any of the primary functions can be used by simply pressing the desired function key. For example: To activate the DCV function, press the DCV key.
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GETTING STARTED Navigating the Menu System The menu system is navigated with the Up, Down, Left and Right arrow keys, the Auto/Enter key and the SHIFT/EXIT key. RANGE Auto Enter SHIFT EXIT RANGE To enter the menu system, press the MENU key. See page 143 for the System Menu tree. USB STO MENU  Pressing the Left and Right arrow keys will navigate to each of the menu items on the current menu level.  Pressing the Down key will go down to the next level of the menu tree.
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GDM-834X Series User Manual Editing a Setting or Parameter When you access a menu or parameter setting, the Up, Down, Left and Right keys can be used again to edit the parameter as well. RANGE Auto Enter RANGE 28  If a setting or parameter is flashing, it indicates that that particular parameter can be edited.  Pressing the Left or Right arrow key will allow you to select a digit or character to edit.  Pressing the Up or Down keys will allow you to edit the selected character.
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OPERATION OPERATION Basic Measurement Overview ......................................... 31 Refresh Rate ............................................................... 31 Reading Indicator ....................................................... 31 Automatic/Manual Triggering ................................... 32 AC/DC Voltage Measurement ......................................... 33 Select the Voltage Range ........................................... 35 Voltage Conversion Table ..........................
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GDM-834X Series User Manual Set the Reference Junction Temperature .................. 56 Dual Measurement Overview ........................................... 57 Supported dual measurement modes ...................... 57 Using Dual Measurement Mode ............................... 58 Advanced Measurement Overview ................................... 62 Supported Advanced Measurement Functions ........ 62 dBm/dB/W Measurement ................................................ 63 dBm/dB Calculation ...........
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OPERATION Basic Measurement Overview Refresh Rate Background The refresh rate defines how frequently the DMM captures and updates measurement data. A faster refresh rate yields a lower accuracy. A slower refresh rate yields a higher accuracy. Consider these tradeoffs when selecting the refresh rate. For further details, please see the specifications.
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GDM-834X Series User Manual Reading Indicator Overview 1. The reading indicator next to the 1st display flashes according to the refresh rate setting. V Automatic/Manual Triggering Overview Manual Trigger By default, the GDM-8342/8341 automatically triggers according to the refresh rate. See the previous page for refresh rate setting details. The TRIG key is used to manually trigger acquisition when the trigger mode is set to EXT. 1. Press SHIFT+TRIG to toggle the trigger mode to EXT. 2.
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OPERATION AC/DC Voltage Measurement The GDM-8342/8341 can measure from 0 to 750VAC or 0 to 1000VDC, however the CATII measurement is only rated up to 600V. Set to ACV/DCV Measurement 1. Press the DCV or ACV key to measure DC or AC voltage. For AC + DC voltage, press the ACV and DCV keys at the same time. 2. The mode will switch to AC, DC or AC+DC mode immediately, as shown below.
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GDM-834X Series User Manual INPUT V CAT W 600V MAX MAX 0.5A FUSE T0.
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OPERATION Select the Voltage Range The voltage range can be set automatically or manually. Auto Range To turn the automatic range selection On/Off, press the AUTO key. Manual Range Press the Up or the Down key to select the range. The AUTO indicator turns Off automatically. If the appropriate range is unknown, select the highest range. Selectable Voltage Ranges Range Resolution Full scale 500mV 10μV 510.00mV 5V 0.1mV 5.1000V 50V 1mV 51.000V 500V 10mV 510.00V 750V (AC) 100mV 765.
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GDM-834X Series User Manual For example: A C D +5V DC 5V Range 0V -5V E B A,B: Input exceeds the ADC dynamic range. C,D: The DCV offset causes the input to exceed the upper ADC dynamic range. E: The DCV offset causes the input to exceed the lower ADC dynamic range. The DC voltage range should be manually selected when any of the following conditions are true:  When DCV measurement is used.  When the signals being measured contain both DC and AC components.
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OPERATION Voltage Conversion Table This table shows the relationship between an AC and DC reading for various waveforms. Waveform Peak to Peak AC (True RMS) DC Sine 2.828 1.000 0.000 1.414 0.435 0.900 2.000 0.771 0.636 2.000 1.000 0.000 1.414 0.707 0.707 2.000 2K PK-PK Rectified Sine (full wave) PK-PK Rectified Sine (half wave) PK-PK Square PK-PK Rectified Square PK-PK Rectangular Pulse X K= ( D  D PK-PK D=X/Y Y Triangle Sawtooth 3.464 1.000 2D 2) D=X/Y 0.
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GDM-834X Series User Manual Crest Factor Table Background Crest factor is the ratio of the peak signal amplitude to the RMS value of the signal. It determines the accuracy of AC measurement. If the crest factor is less than 3.0, voltage measurement will not result in error due to dynamic range limitations at full scale. If the crest factor is more than 3.0, it usually indicates an abnormal waveform as seen from the below table. Crest Factor Table 38 Waveform Shape Crest factor Square wave 1.
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OPERATION AC/DC Current Measurement The GDM-834X series DMMs have two input terminals for current measurement. A 0.5A terminal for current less than 0.5A and a 10A terminal for measurements up to 12A. The units can measure 0 ~ 10A for both AC and DC current. Set to ACI/DCI Measurement 1. Press SHIFT → DCV or SHIFT → ACV to measure DC or AC current, respectively. For AC+DC current, press SHIFT followed by both the DCV and ACV key at the same time. 2.
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GDM-834X Series User Manual INPUT V CAT W 600V MAX MAX 0.5A MAX 500Vpk COM Max 0.5A 40 MAX 12A Max 12A FUSE T0.
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OPERATION Select the Current Range The current range can be set automatically or manually. Auto Range To turn the automatic range selection On/Off, press the AUTO key. Manual Range Press the Up or the Down key to select the range. The AUTO indicator turns Off automatically. If the appropriate range is unknown, select the highest range. Selectable Current Ranges Range Note Note Resolution Full scale 500µA 10nA 510.00μA 5mA 100nA 5.1000mA 50mA 1μA 51.000mA 500mA 10μA 510.
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GDM-834X Series User Manual For example: A C D +5A DC 5A Range 0V -5A B E A,B: Input exceeds the ADC dynamic range. C,D: The DCI offset causes the input to exceed the upper ADC dynamic range. E: The DCI offset causes the input to exceed the lower ADC dynamic range. The DC current range should be manually selected when the following conditions are true:  When DCI measurement is used.  When the signals being measured contain both DC and AC components.
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OPERATION Resistance Measurement Set to Ω Measurement 1. Press the Ω/ key to activate resistance measurement. Note: pressing the Ω/ key twice will activate continuity measurement instead. 2. The mode will switch to resistance mode immediately, as shown below. Display Resistance indicator 2W Resistance units AUTO Measurement range S k W Connection The GDM-8342/8341 uses 2-wire resistance measurement. Connect the test leads between the VΩ terminal and the COM terminal.
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GDM-834X Series User Manual Select the Resistance Range The resistance range can be set automatically or manually. Auto Range To turn the automatic range selection On/Off, press the AUTO key. Manual Range Press the Up or the Down key to select the range. The AUTO indicator turns Off automatically. If the appropriate range is unknown, select the highest range. Selectable Resistance Ranges Note 44 Range Resolution Full scale 500Ω 10mΩ 510.00Ω 5kΩ 100mΩ 5.1000kΩ 50kΩ 1Ω 51.
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OPERATION Diode Test The diode test checks the forward bias characteristics of a diode by running a constant forward bias current of approximately 0.83mA through the DUT. Set to Diode Measurement 1. Press the / key once to activate diode measurement. Note: pressing the / key twice will activate the capacitance measurement instead. 2. The mode will switch to Diode mode immediately, as shown below.
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GDM-834X Series User Manual Capacitance Measurement The capacitance measurement function checks the capacitance of a component. Set to Diode Measurement 1. Press the / key twice to activate capacitance measurement. Note: pressing the / key once will activate the diode measurement instead. 2. The mode will switch to capacitance mode immediately, as shown below.
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OPERATION Select the Capacitance Range The capacitance range can be set automatically or manually. Auto Range To turn the automatic range selection On/Off, press the AUTO key. Manual Range Press the Up or the Down key to select the range. The AUTO indicator turns Off automatically. If the appropriate range is unknown, select the highest range. Selectable Capacitance Ranges Range Resolution Full scale 5nF 1pF 5.100nF 50nF 10pF 51.00nF 500nF 100pF 510.0nF 5μF 1nF 5.100μF 50μF 10nF 51.
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GDM-834X Series User Manual Continuity Test The continuity test checks that the resistance in the DUT is low enough to be considered continuous (of a conductive nature). Procedure 1. Press the Ω/ testing. key twice to activate continuity 2. The mode will switch to continuity testing immediately, as shown below. Display Continuity state Continuity function indicator S W Connection Connect the test lead between the VΩ terminal and COM terminal. The display updates the reading.
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OPERATION Set Continuity Threshold The continuity threshold defines the maximum resistance allowed in the DUT when testing the continuity. Range Procedure Threshold 0 to 1000Ω (Default Threshold:10Ω) Resolution 1Ω 1. Press MENU. 2. Go to the MEAS menu on level 1 3. Go to the CONT menu on level 2 4. Set the continuity threshold level. 5. Press the Enter key to confirm the continuity settings. 6. Press EXIT to exit the CONT setting menu.
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GDM-834X Series User Manual Continuity Beeper Settings The beeper setting defines how the GDM-8342/8341 notifies the continuity test result to the user. Note: When the Beeper setting is off it will also turn off the keypad tones as well as any error or warning tones. Range Procedure PASS Beeps when the continuity passes. FAIL Beeps when the continuity fails. OFF Beeper is turned off. 1. Press MENU. 2. Go to the SYSTEM menu on level 1 3. Go to the BEEP menu on level 2 4.
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OPERATION Frequency/Period Measurement The GDM-8342/8341 can be used to measure the frequency or period of a signal. Range Procedure Frequency 10Hz~500kHz Period 2.0μs ~100ms To measure frequency, press the Hz/P key once. FREQ will be displayed on the secondary display. To measure the period, press the Hz/P key twice. PERIOD will be displayed on the secondary display.
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GDM-834X Series User Manual Frequency/Period Voltage Range Settings The input voltage range for frequency/period measurements can be set to Auto range or to manual. By default, both the period and frequency voltage range are set to Auto. Range Manual Range Voltage 500mV, 5V, 50V, 500V, 750V 1. When in the PERIOD or FREQ measurement mode, press the 2ND key twice. This will allow the secondary display to show the voltage range. 2. Set the range with the Up and Down keys.
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OPERATION Temperature Measurement The GDM-8342 can measure temperature using a thermocouple. To measure temperature, the DMM accepts a thermocouple input and calculates the temperature from the voltage fluctuation. The thermocouple type and reference junction temperature are also considered. Temperature measurement is only supported on the GDM-8342. Range Thermocouple: -200°C ~ +300°C Procedure To make temperature measurements, press SHIFT → Hz/P (TEMP).
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GDM-834X Series User Manual INPUT V CAT W 600V MAX MAX 0.5A FUSE T0.5A 250V MAX 500Vpk 1000V 750V COM MAX 12A Set the Temperature Units Range Procedure Units ˚C, ˚F 1. Press the MENU key. 2. Go to TEMP on level 1. 3. Go to UNIT on level 2. 4. Select either C (Celsius) or F (Farenheit). 5. Press the Enter key to confirm. 6. Press the EXIT key to exit from the temperature menu.
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OPERATION Select Thermocouple Type The GDM-8342 accepts thermocouple inputs and calculates the temperature from the voltage difference of two dissimilar metals. Thermocouple type and reference junction temperature are also considered. Thermocouple type and range Procedure Type Measurement Range Resolution J -200 to +300˚C 0.1 °C K -200 to +300˚C 0.1 °C T -200 to +300˚C 0.1 °C 1. Press the MENU key. 2. Go to TEMP on level 1. 3. Go to SENSOR on level 2. 4.
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GDM-834X Series User Manual Set the Reference Junction Temperature When a thermocouple is connected to the DMM, the temperature difference between the thermocouple lead and the DMM input terminal should be taken into account and be cancelled out; otherwise an erroneous temperature might be added. The value of the reference junction temperature should be determined by the user. Range Procedure SIM 0 ~ 50˚C (default: 23.00˚C) Resolution 0.01˚C 1. Press the MENU key. 2. Go to TEMP on level 1. 3.
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OPERATION Dual Measurement Overview The dual measurement mode allows you to use the 2nd display to show another item, thus viewing two different measurement results at once. When the multimeter is used in dual measurement mode, both displays are updated from either a single measurement or from two separate measurements.
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GDM-834X Series User Manual Using Dual Measurement Mode Procedure 1. Choose one of the basic measurement functions from the table above to set the measurement mode for the primary display. For example, press DCV to set the first display to DCV measurement. 2. To set a measurement mode for the second display, press the 2ND key and then select the second measurement mode. For example, press 2ND, SHIFT, ACV to select ACI measurement for the second display.
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OPERATION Editing the Measurement Parameters After the secondary measurement function has been activated, the rate, range and measurement item can be edited for either the primary or secondary display. Note however, it is more practical to configure the first or second measurement items before activating dual measurement mode. To edit measurement parameters in dual measurement mode, you must first set which display is the active display.
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GDM-834X Series User Manual Connection The diagrams below describe how to connect the DMM to measure a number of common dual measurement items. Voltage and Frequency/Period measurement INPUT V CAT W 600V MAX MAX 0.5A FUSE T0.
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OPERATION Voltage/Frequency/Period and Current Measurement INPUT V CAT Load W 600V MAX MAX 0.5A FUSE T0.5A 250V MAX 500Vpk 1000V 750V COM MAX 12A 0~12A 0~0.5A Note: DC Current measurements will be displayed as a negative value as the polarity of the current leads has been reversed. Please take into account the resistance of the test leads and internal resistance of the current connection as it is in series with the test circuit.
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GDM-834X Series User Manual Advanced Measurement Overview Advanced measurement mainly refers to the type of measurement which uses the result obtained by one of the basic measurements: ACV, DCV, ACI, DCI, Resistance, Diode/Continuity, Frequency/Period, and Temperature*. Supported Advanced Measurement Functions The following table lists all the advanced measurement functions and which of the basic measurement functions that they support. Basic Measurement Advanced Meas.
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OPERATION dBm/dB/W Measurement dBm/dB Calculation Overview Using the ACV or DCV measurement results, the DMM calculates the dB or dBm value based on a reference resistance value in the following way: dBm= 10 x log10 (1000 x Vreading2 / Rref) dB= dBm – dBmref W= Vreading2/Ref Where: Vreading= Input Voltage, ACV or DCV; Rref= Reference resistance simulating an output load; dBmref= Reference dBm value Measuring dBm/W Procedure 1. Select ACV or DCV measurement. See page 33. 2.
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GDM-834X Series User Manual Display dBm measurement DC Reference resistance S W dB m Setting the Reference Resistance To set the reference resistance, use the Up and Down arrow keys. The selectable reference resistances are shown below. Selectable reference resistances View the result in Watts 2 4 8 16 50 75 93 110 124 125 135 150 250 300 500 600 800 900 1000 1200 8000 When the reference resistance is less than 50Ω, it is possible to calculate the power (in watts).
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OPERATION Measure dB dB is defined as [dBm−dBmref]. When the dB measurement is activated, the DMM calculates the dBm using the reading at the first moment and stores it as dBmref. Procedure 1. Select ACV or DCV measurement. See page 33. 2. Press SHIFT → Ω/ key to activate the dB measurement mode. The 1st display shows the dB reading the second display shows the voltage reading.
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GDM-834X Series User Manual Max/Min Measurement Maximum and Minimum measurement function stores the highest (maximum) or lowest (minimum) reading and shows it on the 1st display when the 2ND key is pressed. Applicable measurements The Max/Min function can be used with the following basic measurement functions: ACV, DCV, ACI, DCI, Ω, Hz/P, TEMP, Procedure For Max measurement, press the MX/MN key once. For Min measurement, press the MX/MN key twice. Display Basic meas.
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OPERATION Relative Measurement Relative measurement stores a value, typically the data at that instant, as the reference. The measurement following the reference is displayed as the delta between the reference. The reference value will be cleared upon exit. Applicable measurements The relative function can be used with the following basic measurement functions: ACV, DCV, ACI, DCI, Ω, Hz/P, TEMP, Procedure Press the REL key. The measurement reading at that instant becomes the reference value.
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GDM-834X Series User Manual Manually Set the 1. To manually set the relative reference value, Relative press SHIFT → REL. Reference Value The REL value is displayed on the screen at full scale. 2. Use the Left and Right arrow keys to navigate to the digit to be edited or to select the decimal point. Use the Up and Down arrow keys to edit the selected digit or to place the position of the decimal point. V 3.
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OPERATION Hold Measurement The Hold Measurement function retains the current measurement data and updates it only when it exceeds the set threshold (as a percentage of the retained value). Applicable measurements Procedure The hold function can be used with the following basic measurement functions: ACV, DCV, ACI, DCI, Ω, Hz/P, TEMP 1. Press the HOLD key. 2. The measurement reading appears on the primary display and the hold threshold on the secondary display.
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GDM-834X Series User Manual Compare Measurement Compare measurement checks to see if the measurement data stays between a specified upper (high) and lower (low) limit. Applicable measurements Procedure The compare function can be used with the following basic measurement functions: ACV, DCV, ACI, DCI, Ω, Hz/P, TEMP, 1. Press SHIFT → HOLD. 2. The high limit setting appears. Use the Left and Right arrow keys to navigate to the digit to be edited, or to select the decimal point.
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OPERATION the high and low limits, PASS will be displayed on the secondary display, If the reading is below the low limit, LOW will be displayed. If the reading is above the high limit, HIGH will be displayed. Display Measurement reading AC Compare result S V COMP Deactivate Compare Measurement Press SHIFT → HOLD to deactivate compare measurements, or simply activate another measurement function.
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GDM-834X Series User Manual Math Measurement Math Measurement Overview Math measurement runs three types of mathematical operations, MX+B, 1/X and Percentage based on the other measurement results. Applicable Measurements The math function can be used with the following basic measurement functions: ACV, DCV, ACI, DCI, Ω, Hz/P, TEMP Overview of Math Functions MX+B Multiplies the reading (X) by the factor (M) and adds/subtracts offset (B). 1/X Inverse. Divides 1 by the reading (X).
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OPERATION decimal point. 3. Press Enter to confirm the M factor settings and to automatically move onto the B offset setting. 4. Edit the B offset in the same fashion as the M factor was edited. 5. Press Enter to confirm the B offset setting and to begin the MX+B measurement. Display MX+B meausurement MX+B math reading indicator DC AUTO S m Deactivate Math Measurement V MATH Press SHIFT → MX/MN to deactivate the MATH function, or simply activate another measurement function.
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GDM-834X Series User Manual 3. Press Enter to activate the 1/X math function. The results begin immediately. Display 1/X measurement AC AUTO 1/X math indicator S V Deactivate Math Measurement MATH Press the SHIFT → MX/MN to deactivate the MATH function, or simply activate another measurement function. Measure Percentage Procedure 1. Press SHIFT → MX/MN to enter the MATH menu. 2. The MX+B setting appears. Press the Up key to skip past MX+B settings and go to the REF% settings.
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OPERATION 4. Press Enter to confirm the REF% setting and to begin the Percentage measurement. Display Calculated percentage meausurement DC AUTO % function indicator S V Deactivate Math Measurement MATH Press SHIFT → MX/MN to deactivate the MATH function, or simply activate another measurement function.
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GDM-834X Series User Manual SYSTEM/DISPLAY CONFIGURATION View Serial Number ........................................................ 77 View Version Number ...................................................... 77 Brightness Settings ......................................................... 78 Input Resistance Settings ................................................ 79 Frequency/Period Input Jack Settings ............................... 80 Compatibility Settings ...........................................
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SYSTEM/DISPLAY CONFIGURATION View Serial Number Procedure 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to S/N on level 2. 4. The serial number will be displayed across both the primary and secondary display. Display Press the EXIT key twice to go back to the measurement screen. Exit View Version Number Procedure 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to VER on level 2. 4. The firmware version number will be displayed in the secondary display. 5.
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GDM-834X Series User Manual Brightness Settings The display has 5 settable brightness levels. Range Procedure Brightness 1 (dim) ~ 5 (bright) 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to LIGHT on level 2. 4. Set the light setting between 1 (dim) and 5 (bright). 5. Press the Enter key to confirm. 6. Press the EXIT key to exit from the brightness settings.
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SYSTEM/DISPLAY CONFIGURATION Input Resistance Settings The 500mV and 5V DC voltage ranges can be set to an input resistance of 10MΩ or 10GΩ. This setting is only applicable for DC voltage. Range Procedure Input resistance 10MΩ, 10GΩ Default 10MΩ 1. Press the MENU key. 2. Go to MEAS on level 1. 3. Go to INPUT R on level 2. 4. Set the input resistance to 10MΩ or 10GΩ 5. Press the Enter key to confirm. 6. Press the EXIT key to exit from the input resistance menu.
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GDM-834X Series User Manual Frequency/Period Input Jack Settings The INJACK settings set which input terminal is used for frequency or period measurements. Range Procedure Injack VOLT, 500mA, 10A Default VOLT 1. Press the MENU key. 2. Go to MEAS on level 1. 3. Go to INJACK on level 2. 4. Set the INJACK setting to either VOLT, 500mA or 10A. 5. Press the Enter key to confirm. 6. Press the EXIT key to exit from the INJACK menu.
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SYSTEM/DISPLAY CONFIGURATION Compatibility Settings Changing the Compatibility Setting The GDM-8341/8342 can be set to a special compatibility mode that will allow the unit to emulate the SCPI command syntax of the GDM-8246 when in remote control mode. For example, this feature can allow programs that were originally written for the GDM-8246 to run on the GDM-8342/8341 with little modification. Range Procedure LANG NORM, COMP 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to LANG on level 2.
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GDM-834X Series User Manual Restore Factory Default Settings The factory default settings can be restored at anytime from the System menu. Please see the Appendix on page 144 for a list of the factory default settings. Range Procedure Factory DEF YES, NO 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to FACTORY on level 2. 4. Set the (FACTORY) DEF setting to YES or NO. Choosing YES will restore the factory default settings. 5.
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USB STORE USB STORE The GDM-8342 is able to save/log measurement results to a USB stick. Please note that this function is not available for the GDM-8341, however similar functionality is possible on a PC via remote control using the Excel Add-In, GDM-834x Excel Addins. See the GDM-834X Series Excel Add-In manual for details. USB Store Overview ....................................................... 84 Supported USB Sticks: ............................................... 84 CSV Format ....................
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GDM-834X Series User Manual USB Store Overview The GDM-8342 is able to store measurement results to a USB stick. The USB storage function also has comprehensive save options that allow you to create a save file name, allow you to save up to a specified number of reading counts as well as the option to continue saving to a previously stored file instead of saving to a new file.
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USB STORE 1st Unit The units for the reading on the primary display. 2nd Value The reading on the secondary display. 2nd Unit The units for the reading on the secondary display. Count Counts the number of readings each time the measurement is started. The count is restarted each time measurement is restarted. When a measurement is started/restarted, the first count is marked as #START#, the last as #END#.
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GDM-834X Series User Manual example, if 102000 counts are logged, 3 files will be created: GW000\GW000-00.CSV (counts 1~50000), GW000\GW000-01.CSV (counts 50001~100000), and GW000\GW000-02.CSV (counts 100001 ~ 102000). Note *Please note that automatic file name generation only occurs if the FILE setting is set to NEW FILE. See page 92 for details. **Please note that the suffix will only be incremented if the total number of readings exceeds 50000.
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USB STORE Advance Mode Users can make detailed settings by themselves in this mode. Advance mode is more flexible, so it is comparatively more complex and only recommended for advanced users. The following settings are available in this mode: “Existing File”, “File Name”, “Count”, “Time Mode”, “Time Setup” and “Date Setup.” Note that the settings that are available for the Advance mode are automatically available when you activate the USB Store function in the Advance mode. See page 97. Procedure 1.
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GDM-834X Series User Manual Long Record Mode Overview If users need long-term data records, the Long Record Mode can be used to log test data for a long period of time. In this mode, the Rate is set by the system to the slow rate and the refresh rate is set to 1 data refresh per second (excluding dual measurement, ACI+DCI and ACV+DCV modes). Normal The Normal setting is the regular record mode.
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USB STORE Display Operator mode setting Operator mode menu indicator View the Store Function Status Overview The USB Status menu can be used to check the status of the USB Store function. This function will allow you to see if the save operation has completed or check the elapsed time or the current reading count. USB Store Status Items ELTIME Displays the elapsed time from when the USB store function was started.
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GDM-834X Series User Manual Procedure S-FILE Shows the filename of the first log file of the present record. E-FILE Shows the filename of the last log file of the present record. 1. Insert a USB stick and start the USB Store function as described on page 96 or 97. 2. To check the status of a save operation press SHIFT → 2ND. 3. The USB Status menu will appear on the display. The elapsed time will be displayed when you enter this menu. 4.
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USB STORE Set the Starting File Name (Available only in Advance Mode ) Overview The GDM-8342 will allow you to set the value of the starting file name instead of the default GW000-XX.CSV. Note that the suffix, XX, cannot be edited. This setting will appear automatically after the USB Store function has been started in Advance mode, see page 97 for details. Range Display GW000-XX.CSV to GW999XX.
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GDM-834X Series User Manual until the USB store function is turned off. This setting will appear automatically after the USB Store function has been started in Advance mode, see page 97 for details. Note Display When set to CONTINU, the actual number of reading counts cannot exceed 5000000 (50000 readings X100).
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USB STORE Time Mode (Available only in Advance Mode) Range Overview TIME CURRENT, RESTART Default RESTART The Time Mode setting designates how the readings are time-stamped when saved to a CSV file. The CURRENT setting time stamps each reading from the time when the DMM was first turned on. The RESTART setting restarts the time stamp time to 0 each time the USB STO function is used.
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GDM-834X Series User Manual Overview Note Procedure The timer setting sets the “current” timer time that is used to time stamp readings when saving to USB. By default the timer time is the elapsed time from when the unit was turned on. If the timer time ticks over 23:59:59, the timer will revert back to 00:00:00 and the time stamp will include a “day” count for each time this occurs. Note, however, the “day” count cannot be set in the timer settings.
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USB STORE Date Range Overview Note Procedure Date 13.03.01 ~ 99:12:31 (Year:Month:Day) Default 13.03.01 The date setting sets the date-stamp for any CSV files that are saved. The GDM-8342 has flash memory to store the date settings. The date that is set by the user will be restored each time the power is turned on. The GDM-8342 will not update the date setting automatically, this must be done manually by the user. 1. Press the MENU key. 2. Go to USBSTO on level 1. 3. Go to DATE on level 2. 4.
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GDM-834X Series User Manual Save to USB Overview Note The USB STO option allows the GDM-8342 to store each measurement reading to a USB stick. The USB Store function varies according to whether the operator mode is set to Simple or Advance. When the GDM-8342 starts to save records to USB, all buttons except for the SHIFT, MENU, 2ND and left and right arrow keys will be locked and disabled.
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USB STORE 5. The USB stick can now be removed or another save operation can be performed. WARNING Note Display Do not remove the USB stick while the DMM is saving to the USB drive. The USB STO icon will flash at a faster rate (~5 times/second) if there is no more space left on the USB stick or if the automatically-incremented filename suffix, XX, has reached its maximum value, 99, and cannot be increased further.
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GDM-834X Series User Manual FILE (Existing File, see page 92) NAME (File Name, see page 91) COUNT (Count, see page 91) TMODE (Time Mode, see page 93) TIMER (Time Setup, see page 93) DATE (Date Setup, see page 95) 5. After the DATE option is set, the DMM will begin logging data. The USB STO icon will flash slowly, indicating the DMM is saving to USB. 6. To stop saving to USB, press SHIFT → MENU again. When the save operation has stopped, the USB STO icon will stop flashing and will remain lit. 7.
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USB STORE Note About Deleting Files or Directories on the USB Stick Note If you find the need to delete files or directories that have already been saved to the USB stick, please adhere to the following suggestions to prevent unexpected results when logging data. Overview As the system will look for the last GWXXX directory and last log file (GWXXX-XX.
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GDM-834X Series User Manual GW000-02.CSV Recommended: Deleting only the last files or all the files from a directory: GW000-00.CSV, GW000-01.CSV, GW00002.CSV OR GW000-00.CSV, GW000-01.CSV, GW00002.CSV Not recommended: Deleting any file before the last file. GW000-00.CSV, GW000-01.CSV, GW00002.
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REMOTE CONTROL REMOTE CONTROL This chapter describes basic configuration of IEEE488.2 based remote control. For a command list, refer to the Command Overview chapter on page 106. Configure Remote Control Interface ............................... 102 USB Interface ........................................................... 102 GPIB Interface .......................................................... 103 Return to Local Control .................................................
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GDM-834X Series User Manual Configure Remote Control Interface USB Interface The USB device port on the rear panel is used for remote control. The USB port on the DMM will appear as a virtual COM port to a connected PC. Any terminal program that can communicate via a serial port can be used for remote control. Before the DMM can be used for remote control the USB driver included on the User Manual CD, must first be installed.
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REMOTE CONTROL 6. Press Enter to confirm the baud rate settings. 7. Press EXIT to exit from the USB menu. Display Baud rate setting Baud menu indicator GPIB Interface In addition to the USB port, an optional GPIB port (GDM-8342 only) on the rear panel can be used for remote control. GPIB configuration GPIB Address Range 0~30 Steps 1. Connect the GPIB cable to the rear panel GPIB port. 2. Press MENU. 3. Go to I/O on level 1. 4. Go to GPIB on level 2. 5. Turn GPIB ON and press Enter to Confirm. 6.
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GDM-834X Series User Manual Display Note 104 GPIB address setting GPIB Constraints GPIB menu indicator  Maximum 15 devices together, at least 2/3 of all devices turned on. Cable length should be less then 20m with a maximum of 2m between each device.
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REMOTE CONTROL Return to Local Control When the unit is in remote control mode, the RMT icon above the main display can be seen. When this icon is not displayed, it indicates that the unit is in local control mode. Background Procedure 1. Press the LOCAL/2ND key when in remote mode. 2. The unit will go back into local mode and the RMT icon will turn off.
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GDM-834X Series User Manual COMMAND OVERVIEW The Command overview chapter lists all programming commands in functional order as well as alphabetical order. The command syntax section shows you the basic syntax rules you have to apply when using commands. Command Syntax Compatible Standard IEEE488.2 Partial compatibility SCPI, 1994 Partial compatibility Command Structure SCPI (Standard Commands for Programmable Instruments) commands follow a tree-like structure, organized into nodes.
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COMMAND OVERVIEW Command types There are a number of different instrument commands and queries. A command sends instructions or data to the unit and a query receives data or status information from the unit. Command types Command Forms Simple A single command with/without a parameter Example CONFigure:VOLTage:DC Query A query is a simple or compound command followed by a question mark (?). A parameter (data) is returned.
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GDM-834X Series User Manual Short form CONF:DIOD conf:diod Commands that contain square brackets indicate that the contents are optional. The function of the command is the same with or without the square bracketed items, as shown below. For example, for the query: Square Brackets [SENSe:]UNIT? Both [SENSe:]UNIT? and UNIT? are both valid forms. Command Format 2 3 1 1. 2. Command header Space 3.
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COMMAND OVERVIEW [MIN] (Optional For commands, this will set the parameter) setting to the lowest value. This parameter can be used in place of any numerical parameter where indicated. For queries, it will return the lowest possible value allowed for the particular setting. [MAX] (Optional For commands, this will set the parameter) setting to the highest value. This parameter can be used in place of any numerical parameter where indicated.
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GDM-834X Series User Manual Message Separator 110 Return Message CR+ LF EOL or ; (semicolon) Command Separator
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COMMAND OVERVIEW Command List Configure Commands (Display 1) CONFigure:VOLTage:DC..................................... 116 CONFigure:VOLTage:AC ..................................... 116 CONFigure:VOLTage:DCAC ................................ 116 CONFigure:CURRent:DC ..................................... 116 CONFigure:CURRent:AC ..................................... 117 CONFigure:CURRent:DCAC ................................ 117 CONFigure:RESistance ........................................
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GDM-834X Series User Manual Measure Commands MEASure:VOLTage:DC? ...................................... 123 MEASure:VOLTage:AC? ....................................... 123 MEASure:VOLTage:DCAC? ................................. 123 MEASure:CURRent:DC? ...................................... 123 MEASure:CURRent:AC? ....................................... 124 MEASure:CURRent:DCAC?.................................. 124 MEASure:RESistance? ......................................... 124 MEASure:FREQuency? ........
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COMMAND OVERVIEW Calculate Commands CALCulate:FUNCtion ........................................... 130 CALCulate:FUNCtion? ......................................... 130 CALCulate:STATe ................................................. 130 CALCulate:STATe? ............................................... 130 CALCulate:MINimum? ........................................ 130 CALCulate:MAXimum? ........................................ 130 CALCulate:HOLD:REFerence ..............................
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GDM-834X Series User Manual System Commands SYSTem:BEEPer:STATe ....................................... 136 SYSTem:BEEPer:STATe? ...................................... 136 SYSTem:BEEPer:ERRor ........................................ 136 SYSTem:BEEPer:ERRor? ...................................... 136 SYSTem:ERRor? ................................................... 136 SYSTem:VERSion? ............................................... 136 SYSTem:DISPlay ..................................................
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COMMAND OVERVIEW *STB?.................................................................... 140 *TRG.....................................................................
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GDM-834X Series User Manual CONFigure Commands CONFigure:VOLTage:DC Sets measurement to DC Voltage on the first display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF:VOLT:DC 5 Sets the voltage range to 5 volts. CONFigure:VOLTage:AC Sets measurement to AC Voltage on the first display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF:VOLT:AC Sets the AC range to auto range.
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COMMAND OVERVIEW CONFigure:CURRent:AC Sets measurement to AC Current on the first display and specifies range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF:CURR:AC 50e-2 Sets the measurement mode to ACI with a 500mA range. CONFigure:CURRent:DCAC Sets measurement to DC+AC Current on the first display and specifies range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF:CURR:DCAC 50e-2 Sets the measurement mode to DC+AC Current with a 500mA range.
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GDM-834X Series User Manual CONFigure:PERiod Sets measurement to Period on the first display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF:PER Sets the DMM to period measurement using the previous range. CONFigure:CONTinuity Sets measurement to Continuity on the first display. Parameter: None CONFigure:DIODe Sets measurement to Diode on the first display.
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COMMAND OVERVIEW CONFigure:RANGe? Returns the current range on the first display. Return Parameter: DCV: 0 .5(500mV), 5(5V), 50(50V), 500(500V), 1000(1000V) ACV: 0.5(500mV), 5(5V), 50(50V), 500(500V), 750(750V) ACI: 0.0005(500μA), 0.005 (5mA), 0.05(50mA), 0.5(500mA), 5(5A), 10(10A) DCI: 0.0005(500μA), 0.005 (5mA), 0.05(50mA), 0.
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GDM-834X Series User Manual CONFigure2:VOLTage:AC Sets measurement to AC Voltage on the second display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF2:VOLT:AC Sets the measurement mode to AC voltage. CONFigure2:CURRent:DC Sets measurement to DC Current on the second display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF2:CURR:DC 50e-3 Sets the DC current range to 50mA on the second display.
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COMMAND OVERVIEW CONFigure2:FREQuency Sets measurement to Frequency on the second display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF2:FREQ MAX Sets the frequency measurement range to max on the second display. CONFigure2:PERiod Sets measurement to Period on the second display and specifies the range. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: CONF2:PER Sets the DMM to period measurement using the previous range.
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GDM-834X Series User Manual CONFigure2:RANGe? Returns the range of the current function on the second display. Return parameter: DCV: 0 .5(500mV), 5(5V), 50(50V), 500(500V), 1000(1000V) ACV: 0.5(500mV), 5(5V), 50(50V), 500(500V), 750(750V) ACI: 0.0005(500μA), 0.005 (5mA), 0.05(50mA), 0.5(500mA), 5(5A), 10(10A) DCI: 0.0005(500μA), 0.005 (5mA), 0.05(50mA), 0.
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COMMAND OVERVIEW Measure Commands MEASure:VOLTage:DC? Returns the DC voltage measurement on the first display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS:VOLT:DC? >+0.488E-4 Returns the DC voltage measurement as 0.0488 mV. MEASure:VOLTage:AC? Returns the AC voltage measurement on the first display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS:VOLT:AC? >+0.511E-3 Returns the AC voltage measurement as 0.511 mV.
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GDM-834X Series User Manual MEASure:CURRent:AC? Returns the AC current measurement on the first display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS:CURR:AC? > +0.387E-2 Returns the AC current measurement as 3.87mA. MEASure:CURRent:DCAC? Returns the DC+AC current measurement on the first display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS:CURR:DCAC? >+0.123E-4 Returns the DC+AC current measurement as 0.0123 mA.
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COMMAND OVERVIEW MEASure:CONTinuity? Returns the continuity measurement on the first display. Example: MEAS:CONT? Returns the continuity. MEASure:DIODe? Returns the diode measurement on the first display. Example: MEAS:DIOD? Returns the diode measurement. MEASure:TEMPerature:TCOuple? Returns the temperature for the selected thermocouple type on the first display. Parameter:[NONE] | J | K | T Example: MEAS:TEMP:TCO? J > +2.50E+1 Returns the temperature.
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GDM-834X Series User Manual MEASure2:CURRent:DC? Returns the DC current measurement on the second display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS2:CURR:DC? >+0.234E-4 Returns the DC current measurement as 0.0234 mA. MEASure2:CURRent:AC? Returns the AC current measurement on the second display. Parameter: [None] | [Range( | MIN | MAX | DEF)] Example: MEAS2:CURR:AC? > +0.387E-2 Returns the AC current measurement.
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COMMAND OVERVIEW SENSe Commands [SENSe:]TEMPerature:TCOuple:TYPE Sets thermocouple type. Parameter: Type(J | K | T) Example: SENS:TEMP:TCO:TYPE J Sets the thermocouple to type J. [SENSe:]TEMPerature:TCOuple:TYPE? Returns the thermocouple type. Return parameter: J, K, T [SENSe:]TEMPerature:RJUNction:SIMulated Set temperature simulation value. Parameter: (0.00 ~ 50.00) Example: SENS:TEMP:RJUN:SIM 25.00 Sets the thermocouple junction temperature to 25˚C.
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GDM-834X Series User Manual [SENSe:]FREQuency:INPutjack Assigns an input terminal for the frequency function. Parameter: (0|1|2) 0=volt, 1=500mA, 2=10A Example: SENS:FREQ:INP 0 Sets the input jack to the Volt input terminal. [SENSe:]FREQuency:INPutjack? Returns the assigned input terminal used for the frequency function. Return Parameter: VOLT, 500mA, 10A [SENSe:]PERiod:INPutjack Assigns an input terminal for the period function.
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COMMAND OVERVIEW [SENSe:]UNIT Sets the temperature unit. Parameter: C|F Example: SENS:UNIT C Sets the temperature unit to ˚C. [SENSe:]UNIT? Returns the temperature unit. [SENSe:]FUNCtion[1/2] Sets the function for the first or second display.
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GDM-834X Series User Manual CALCulate Commands CALCulate:FUNCtion Sets the Advanced function. Parameter: OFF | MIN | MAX | HOLD | REL | COMP | DB | DBM | MXB | INV | REF Example: CALC:FUNC REL Sets the Advanced function to REL (relative) CALCulate:FUNCtion? Returns the current Advanced function. CALCulate:STATe Turns the Advanced function on/off. Parameter: ON|OFF Example: CALC:STAT OFF Turns the Advanced function off. CALCulate:STATe? Returns the status of the Advanced function.
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COMMAND OVERVIEW CALCulate:HOLD:REFerence Sets the percentage threshold for the Hold function. Parameter: (0.01, 0.1, 1, 10) Example: CALC:HOLD:REF 10 Sets the hold percentage to 10%. CALCulate:HOLD:REFerence? Returns the percentage threshold from the Hold function. CALCulate:REL:REFerence Sets the reference value for the relative function. Parameter: | MIN | MAX Example: CALC:REL:REF MAX Sets the reference value to the maximum allowed.
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GDM-834X Series User Manual CALCulate:LIMit:UPPer? Returns the upper limit of the compare function. CALCulate:DB:REFerence Sets the reference value for the dB function. Parameter: | MIN | MAX Example: CALC:DB:REF MAX Sets the reference voltage for dB measurements to the maximum allowed. CALCulate:DB:REFerence? Returns the reference voltage from the dB function. CALCulate:DBM:REFerence Sets the resistance value for the dBm function.
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COMMAND OVERVIEW CALCulate:MATH:MBFactor Sets the offset factor B for math measurements. Parameter: | MIN | MAX Example: CALC:MATH:MBF MIN Sets the offset factor B to the minimum allowed value. CALCulate:MATH:MBFactor? Returns the offset factor B used in the math measurement. CALCulate:MATH:PERCent Sets the reference value for the Percent function. Parameter: | MIN | MAX Example: CALC:MATH:PERC MAX Sets the reference value for the Percent function to the maximum.
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GDM-834X Series User Manual TRIGger Commands READ? Returns 1st and 2nd display value. VAL1? Returns the 1st display reading Example: SAMP:COUN 100 VAL1? >+0.333E-4,V DC >+0.389E-4,V DC > etc, for 100 counts. Queries 100 counts of stored samples from the 1st display. VAL2? Returns the 2nd display reading. Example: SAMP:COUN 100 VAL2? >+0.345E-4,V DC >+0.391E-4,V DC > etc, for 100 counts. Queries 100 counts of stored samples from the 2nd display. TRIGger:SOURce Selects the trigger source.
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COMMAND OVERVIEW TRIGger:AUTO Turns Trigger Auto mode on/off. Parameters: ON | OFF Example: TRIG:AUTO OFF Turns the Trigger Auto mode off. TRIGger:AUTO? Returns the Trigger Auto mode. Return parameter: 0|1, 0=OFF, 1=ON SAMPle:COUNt Sets the number of samples. Parameter: (1 ~ 9999) | MIN | MAX Example: SAMP:COUN 10 Sets the number of samples to 10. SAMPle:COUNt? Returns the number of samples. Parameter: None | MIN | MAX TRIGger:COUNt Sets the number of trigger counts.
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GDM-834X Series User Manual SYSTem Related Commands SYSTem:BEEPer:STATe Selects the beeper mode; no beep, beep on fail and beep on pass. Parameter: (0 | 1 | 2) 0=no beep, 2=fail, 1=pass Example: SYST:BEEP:STAT 0 Turns the beeper off. SYSTem:BEEPer:STATe? Returns the beeper mode. Return parameter: Beep on Pass | Beep on Fail | No Beep SYSTem:BEEPer:ERRor Sets the beeper to sound on an SCPI error. Parameter: ON | OFF Example: SYST:BEEP:ERR ON Allows the beeper to sound when an SCPI error occurs.
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COMMAND OVERVIEW SYSTem:DISPlay Turns the Display on/off. Parameter: ON | OFF Example: SYST:DISP ON Turns the display on. SYSTem:DISPlay? Returns the status of the display Return parameter: 0|1, 0=OFF, 1=ON SYSTem:SERial? Returns the serial number (eight characters/numbers) SYSTem:SCPi:MODE Sets the SCPI mode. Parameter: NORM| COMP (NORM=Normal, COMP= Compatible to GDM8246) Example: SYST:SCP:MODE NORM Sets the SCPI mode to normal. SYSTem:SCPi:MODE? Returns the SCPI mode.
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GDM-834X Series User Manual STATus Report Commands STATus:QUEStionable:ENABle Set bits in the Questionable Data Enable register. STATus:QUEStionable:ENABle? Returns the contents of the Questionable Data Enable register. STATus:QUEStionable:EVENt? Returns the contents of the Questionable Data Event register. STATus:PRESet Clears the Questionable Data Enable register. Example: STAT:PRES Interface Commands SYSTem:LOCal Enables local control (front panel control) and disables remote control.
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COMMAND OVERVIEW IEEE 488.2 Common Commands *CLS Clears the Event Status register (Output Queue, Operation Event Status, Questionable Event Status, Standard Event Status) *ESE? Returns the ESER (Event Status Enable Register) contents. Example: *ESE? >130 Returns 130. ESER=10000010 *ESE Sets the ESER contents. Parameter: (0~255) Example: *ESE 65 Sets the ESER to 01000001 *ESR? Returns SESR (Standard Event Status Register) contents. Example: *ESR? >198 Returns 198.
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GDM-834X Series User Manual *OPC Sets operation complete bit (bit0) in SERS (Standard Event Status Register) when all pending operations are completed. *PSC? Returns power On clear status. Return parameter: (0|1) 0= don’t clear, 1=clear *PSC Clears power On status. Parameter: (0|1) 0=don’t clear, 1= clear *RST Recalls default panel setup. *SRE? Returns the SRER (Service Request Enable Register) contents. *SRE Sets SRER contents.
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COMMAND OVERVIEW For the following command sets, please refer to the status system diagram on page 148.
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GDM-834X Series User Manual FAQ The DMM performance doesn’t match the specifications. Make sure the device is powered On for at least 30 minutes, within 18~28˚C. This is necessary to stabilize the unit to match the specifications. The measured voltage does not match the expected value. There are a number of reasons why the measured value may not match the expected values. 1. Ensure that all connections are connected securely and have a good contact at all times.
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APPENDIX APPENDIX System Menu Tree LEVEL 1 SYSTEM TEMP MEAS I/O USBSTO GDM-8342 only LEVEL 2 LEVEL 2 SENSOR TYPE J TYPE K TYPE T LEVEL 2 CONT BEEP VER PASS FAIL OFF Vx.xx GPIB 115200 57600 38400 19200 9600 OFF ON 1 : 30 GDM-8342 only SIM UNIT 23.00 C F GDM-8342 only INJACK INPUT R 0010 LEVEL 2 USB VOLT 500mA 10A LIGHT SN 10M 10G LANG LIGHT:1 12345678 NORM LIGHT:2 COMP LIGHT:3 LIGHT:4 LIGHT:5 LEVEL 2 MODE FACTORY NO YES RECORD TIMER DATE SIMPLE NORMAL 00:00:00 13.03.
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GDM-834X Series User Manual Factory Default Settings Measurement Item DCV Range AUTO Rate S SYSTEM Menu BEEP: Pass VER: N/A LIGHT: 3 S/N: N/A LANG: NORM FACTORY: NO MEAS Menu CONT: 0010Ω INJACK: VOLT INPUT R: 10M TEMP Menu SENSOR: TYPE J SIM: 23.00 UNIT: C I/O Menu USB: BAUD: 115200 GPIB: OFF USBSTO Menu MODE: SIMPLE RECORD:NORMAL TIMER: 00:00:00 DATE: 13.03.
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APPENDIX Replacing the AC Source Fuse Fuse Ratings Note Steps Type Rating 0.125AT 100VAC, 120VAC 0.063AT 220VAC, 240VAC Only replace the fuse with a fuse of the correct type and rating. 1. Turn the DMM off and take out the power cord. 2. Remove the fuse socket using a flathead screwdriver. 3. Remove the fuse in the holder and replace with the correct type and rating. 4. Ensure the correct line voltage is lined up with the arrow on the fuse holder. Insert the fuse socket.
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GDM-834X Series User Manual Replacing the Input Fuse Fuse Rating Note Steps Type Rating T0.5A 0.5A 250V Only replace the fuse with a fuse of the correct type and rating. 1. Turn the DMM off. 2. Press the fuse holder with your finger and turn anticlockwise. This will release the fuse holder from the panel. IN P VW T CA 600 UT V X M AA 0 .5 E FUS 5A T0.
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APPENDIX 3. Replace the fuse at the end of the holder with the correct type and rating. IN P VW CA T 600 UT V X M AA 0 .5 E FUS 5A T0. V 250 M X M A pk C O V 500 MA X 0V 1 0 00 V 75 X M AA 12 3 4. Push the fuse holder back into the panel and turn clockwise when the fuse holder is level with the front panel.
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GDM-834X Series User Manual Status system The diagram below is a description of the status system For the following command sets, please refer to the diagram above.
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APPENDIX Specifications The specifications apply when the DMM is warmed up for at least 30 minutes and operates in slow rate. Below are the basic conditions required to operate the DMM within specifications:        Calibration: Yearly Operating Temperature Specification: 18~28˚C (64.4~82.4˚F) Relative Humidity: 80% (Non condensing) Accuracy: ± (% of Reading + Digits) AC measurements are based on a 50% duty cycle. The power supply cable must be grounded to ensure accuracy.
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GDM-834X Series User Manual DC Voltage Accuracy (1 year 23˚C ±5˚C) Input Resistance 10MΩ or 500mV 10μV 510.00 >10GΩ 10MΩ or 5V 100μV 5.1000 >10GΩ 0.02%+4 11.1MΩ 50V 1mV 51.000 10.1MΩ 500V 10mV 510.00 10MΩ 1000V 100mV 1020.0 * When the input value exceeds the full scale of the selected range, the display will show -OL- (over load) on the display. * The specifications are guaranteed to an input voltage of 1000V. A beeping alarm will go off when the input voltage is higher than 1000V.
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APPENDIX AC Voltage, ACV+DCV[3] (AC Coupled) Full Accuracy (1 year 23˚C ±5˚C) [1] 30-50Hz 50-10kHz 10K-30kHz 30K-100kHz Range Resolution Scale 0.50%+40 2.00%+60 3.00%+120 500mV 10μV 510.00 1.00%+40 0.35%+15 1.00%+20 3.00%+50 5V 100μV 5.1000 1.00%+20 0.35%+15 1.00%+20 3.00%+50 50V 1mV 51.000 1.00%+20 x 0.5%+15 1.00%+20[2] 3.00%+50[2] 500V 10mV 510.00 x 0.5%+15 x x 750V 100mV 765.0 [1]Specifications are for sine wave inputs that are greater than 5% range. [2]Input voltage <300Vrms.
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GDM-834X Series User Manual Resistance Accuracy (1 year 23˚C Resistance Resolution Full Scale Test Current ±5˚C)[2] 500Ω 10mΩ 510.00 0.83mA 0.1%+5 [1] 5kΩ 100mΩ 5.1000 0.83mA 0.1%+3 [1] 50kΩ 1Ω 51.000 83μA 0.1%+3 500kΩ 10Ω 510.00 8.3μA 0.1%+3 5MΩ 100Ω 5.1000 830nA 0.1%+3 50MΩ 1KΩ 51.000 560nA//10MΩ 0.3%+3 [1] Using the REL function. If you don't use the REL function then increase the error by 0.2Ω.
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APPENDIX Capacitance Accuracy Range Resolution Full Scale Test Current (1 year 23˚C ±5˚C) [1] 5nF: 0.5~1nF [2] 2.0%+20 0.001nF 5.100 8.3μA 5nF: 1~5nF [2] 2.0%+10 50nF: 5~10nF [2] 2.0%+30 0.01nF 51.00 8.3μA 50nF: 10~50nF [2] 2.0%+10 500nF 0.1nF 510.0 83μA 5μF 1nF 5.100 0.56mA 2.0%+4 50μF 10nF 51.00 0.83mA [1] For the 5nF ~ 50μF range, make sure that the input is greater than 10% of the range. [2] Need to use the REL function. * Input protection of 500V peak on all ranges.
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GDM-834X Series User Manual Temperature Specifications Accuracy (1 year Measurement 23˚C ±5˚C) Type Range Resolution J Thermocouple K -200 ~ +300°C 0.1°C 2 °C T * Note: The temperature specifications do not include sensor error. * Note: This feature is not supported on the GDM-8341.
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APPENDIX Dimensions GDM-8342/GDM-8341 50000 Counts Dual Measurement Multimeter INPUT V CAT W 600V MAX MAX 0.5A POWER DC + AC DCI ACI DCV ACV W dB dBm TEMP LOCAL / / Hz/P 2ND RANGE FUSE T0.
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GDM-834X Series User Manual Declaration of Conformity We GOOD WILL INSTRUMENT CO., LTD. No. 7-1, Jhongsing Rd, Tucheng Dist., New Taipei City 236, Taiwan GOOD WILL INSTRUMENT (SUZHOU) CO., LTD. No. 69 Lushan Road, Suzhou New District Jiangsu, China.
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INDEX INDEX Accessories ................................. 12 Advanced measurement compare .........................................70 dB_..................................................65 dBm/dB calculation .....................63 dBm/W ..........................................63 hold ................................................69 Math 1/X .................................................... 73 MX+B................................................ 72 overview .........................................
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GDM-834X Series User Manual overview ........................................ 22 units ............................................... 54 Refresh rate ................................ 31 Remote control ......................... 101 Tilt stand ..................................... 24 Triggering ................................... 32 UK power cord............................. 9 USB Store Command list ............................. 111 Command syntax ....................... 106 interface configuration GPIB.