Model: 891 300 kHz Bench LCR Meter USER MANUAL
Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this instrument. Before applying power to this instrument: Read and understand the safety and operational information in this manual. Apply all the listed safety precautions. Verify that the voltage selector at the line power cord input is set to the correct line voltage.
battery. Category II (CAT II): Measurement instruments whose measurement inputs are meant to be connected to the mains supply at a standard wall outlet or similar sources. Example measurement environments are portable tools and household appliances. Category III (CAT III): Measurement instruments whose measurement inputs are meant to be connected to the mains installation of a building. Examples are measurements inside a building's circuit breaker panel or the wiring of permanently-installed motors.
Ground the Instrument To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety ground. This instrument is grounded through the ground conductor of the supplied, three-conductor AC line power cable. The power cable must be plugged into an approved three-conductor electrical outlet. The power jack and mating plug of the power cable meet IEC safety standards. Do not alter or defeat the ground connection.
The instrument is designed to be used in office-type indoor environments. Do not operate the instrument In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-divided particulates. In relative humidity conditions outside the instrument's specifications. In environments where there is a danger of any liquid being spilled on the instrument or where any liquid can condense on the instrument.
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets on or inside the instrument, remove the instrument's power cord, remove the instrument from service, label it as not to be operated, and return the instrument to B&K Precision for repair. Notify B&K Precision of the nature of any contamination of the instrument.
the instrument, disconnect all other connections (for example, test leads, computer interface cables, etc.), discharge all circuits, and verify there are no hazardous voltages present on any conductors by measurements with a properly-operating voltage-sensing device before touching any internal parts. Verify the voltage-sensing device is working properly before and after making the measurements by testing with known-operating voltage sources and test for both DC and AC voltages.
ensure that safety and performance features are maintained. Cooling fans This instrument contains one or more cooling fans. For continued safe operation of the instrument, the air inlet and exhaust openings for these fans must not be blocked nor must accumulated dust or other debris be allowed to reduce air flow. Maintain at least 25 mm clearance around the sides of the instrument that contain air inlet and exhaust ports.
Compliance Statements Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste.
CE Declaration of Conformity This instrument meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive with the following standards.
Safety Symbols Refer to the user manual for warning information to avoid hazard or personal injury and prevent damage to instrument. Electric Shock hazard Alternating current (AC) Chassis (earth ground) symbol. Ground terminal On (Power). This is the In position of the power switch when instrument is ON. Off (Power). This is the Out position of the power switch when instrument is OFF.
Table of Contents Safety Summary ......................................................................... i Compliance Statements ..................................................................... viii Safety Symbols ...................................................................................... x 1 General Information ...................................................... 1 1.1 Product Overview ....................................................................... 1 1.2 Package Contents ..
Short Calibration....................................................................... 11 3.2 Parameter Entry ....................................................................... 12 3.3 Impedance Parameters ............................................................ 14 Series and Parallel Models........................................................ 16 Choosing a Test Frequency ....................................................... 17 Choosing a Measurement Circuit Model .........................
4 System ........................................................................ 43 System Information .................................................................. 44 System Setup ............................................................................ 46 Communication Setup .............................................................. 48 5 Save/Recall ................................................................. 49 Save/Recall a Measurement Configuration..............................
1 General Information 1.1 Product Overview The B&K Precision model 891 bench LCR meter is a high accuracy component tester that is capable of testing inductors, capacitors and resistors with adjustable test frequency from 20 Hz to 300 kHz. The 891 has a 2U half rack form factor and is suitable for standard rack mount installation. With the vivid 4.3-inch color graphic LCD, users can operate and read the measurements easily.
following contents: 1 x Model 891 bench LCR meter 1 x AC power cord 1 x 4-wire Kelvin clip test lead 1 x Certificate of calibration 1 x Test report Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision.
1.3 Front Panel Overview 10 9 8 7 6 5 4 3 1 2 Figure 1.1 – Front Panel Overview Front Panel Description 1 Power On/Off Switch 2 Menu Keys 3 Measurement Terminal 4 Save/Recall Keys 5 Numeric Keypad 6 Arrow Keys 7 Local Key 8 Softkeys 9 4.
1.4 Keypad Overview Figure 1.2 – Main Keypad Overview Main Keypad Description Local: Switch to local operation Recall: Recall the configuration from internal memory or external USB flash. Save: Save the configuration, screen and result to internal memory or external USB flash.
Figure 1.
1.5 Rear Panel Overview 7 6 1 5 2 3 4 Figure 1.
1.6 Display Overview 3 1 2 Figure 1.5 – Display Overview Display Description 1 2 3 Main Display Area Displays measurement conditions and measurement results corresponding to the measurement modes. Menu Functions Displays the current measurement mode. Menu Options Displays label options corresponding to the active field.
2 Getting Started Before connecting and powering up the instrument, please review and go through the instructions in this chapter. 2.
Fuse Requirements An AC input fuse is necessary when powering the instrument. The fuse is located at the back of the instrument. In the event the fuse needs to be replaced, make sure the AC input power cord is disconnected from the instrument before replacing. Refer to the table below for the fuse requirements with either 115 VAC or 230 VAC. Before replacing fuse, disconnect AC input power cord first to prevent electric shock. Only use same rating of the fuse.
5. The fuse capsule will now be locked and secured. 2.2 Preliminary Check Complete the following steps to verify that the generator is ready for use. 1. Verify AC Input Voltage Verify and check to make sure proper AC voltages are available to power the instrument. The AC voltage range must meet the acceptable specification as explained in section 2.1. 2. Connect Power Connect AC power cord to the AC receptacle in the rear panel and press the power switch to the ON position to turn ON the instrument.
3 Making Measurements 3.1 Open and Short Calibration The 891 provides open/short calibration capability to have better accuracy in measuring high and low impedance. It is recommended that the user perform open/short calibration if the test leads or the test fixture has been changed. Open Calibration The open calibration feature compensates for any stray admittances that may exist within the test fixture or leads.
may exist within the test fixture or leads. To perform the short calibration, connect all four terminals on the test leads or insert the Shorting Bar into the test fixture. Press SYSTEM → CAL → SHORT CAL keys to start the short calibration. Figure 3.2 – Short Calibration This short calibration takes about 30 seconds. After it is finished, the 891 will beep rapidly to inform that the calibration is done. 3.2 Parameter Entry The test parameters on different measurement functions can vary.
Figure 3.3 – Parameter Selection 2. Use , , or arrow keys to move the cursor to the corresponding parameter field for editing. 3. If the parameter is a numeric value, use the numeric keypad to enter the desired value followed by unit selection using the option softkeys. Figure 3.4 – Digit Selection Entry 4.
decrease. Use the INC or DEC on the softkey to increase or decrease the parameter value. 5. If the parameter is a selection value, press the desired selection on the option softkey. Figure 3.5 – Selection Entry 3.3 Impedance Parameters Components such as inductors (L), capacitors (C), and resistors (R) can respond to test signals with varying frequencies and levels in different ways. Large capacitors tested at high frequencies can respond differently than when tested at lower frequencies.
measurement plane can also be seen as polar coordinates. |Z| is the magnitude and θ is the phase of the impedance. Figure 3.6 – Complex Impedance Plane 𝑍 = 𝑅 + 𝑗𝑋 = |𝑍|∠𝜃 (Ω) 𝑅 = |𝑍| cos 𝜃 X = |𝑍| sin 𝜃 |𝑍| = √𝑅 2 + 𝑋 2 𝜃 = tan−1 (𝑅 ) 𝑋 𝑍 = 𝐼𝑚𝑝𝑒𝑑𝑎𝑛𝑐𝑒 𝑅 = 𝑅𝑒𝑠𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑋 = 𝑅𝑒𝑎𝑐𝑡𝑎𝑛𝑐𝑒 Ω = 𝑂ℎ𝑚 There are two different types of reactance: Inductive (XL) and Capacitive (XC).
𝐿 = 𝐼𝑛𝑑𝑢𝑐𝑡𝑎𝑛𝑐𝑒 (𝐻) 𝐶 = 𝐶𝑎𝑝𝑎𝑐𝑖𝑡𝑎𝑛𝑐𝑒 (𝐹) 𝑓 = 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 (𝐻𝑧) 𝜔 = 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 (𝑟𝑎𝑑⁄𝑠) For components, the quality factor (Q) serves as a measurement of the reactance purity. In the real world, there is always some associated resistance that dissipates power, decreasing the amount of energy that can be recovered. The quality factor can be defined as the ratio of the stored energy (reactance) and the dissipated energy (resistance). Q is generally associated with inductors and D (dissipation factor) for capacitors.
XP RS XS RP Series model Parallel model Figure 3.7 – Series and Parallel Models The impedance for the series model is: 𝑍 = 𝑅𝑠 + 𝑗𝑋𝑠 The impedance for the parallel model is: 1 1 1 = + 𝑍 𝑅𝑃 𝑗𝑋𝑃 These circuit models are mathematically equivalent. The LCR meter measures an impedance, which gives two independent numbers, the magnitude (|Z|) and phase (θ) of the impedance. These are changed into rectangular components R and X, giving the real and imaginary part of the impedance.
above test frequency is used to measure capacitors that are 0.01 µF or smaller. For capacitors that are 10 µF or larger, a frequency of 1 kHz or lower can be used. Following this trend, high test frequencies are best for testing very low capacitance components. For large capacitance components, low frequency would be optimal. For example, if the capacitance of the component is to be in the mF range, then selecting in the range of 20 Hz to 200 Hz for test frequency would give much better results.
Capacitance The impedance in a capacitor is negatively proportional. Therefore, the larger capacitance means the lower impedance, the smaller capacitance reverts to higher impedance. Figure 3.8 shows the equivalent circuit of capacitor. If the capacitance is small, the parallel resistance (RP) becomes large and more relevant than the series resistance (RS). If the capacitance is large, the series resistance becomes dominant and the parallel resistance becomes insignificant.
Large Inductor (High Z) Small Inductor (Low Z) RP L RP L Relevant Less Relevant RS RS Less Relevant Relevant Figure 3.9 – Equivalent Inductor Circuit What is considered high and low impedances to choose the correct circuit model? There is no exact answer, but generally if the impedance is greater than 100 Ω* use the parallel circuit model. Use the series circuit model when the impedance is less than 100 Ω*. *Note: This is only a typical value.
3.4 Configure Basic Measurement If the component under test is a capacitor, make sure the capacitor has been fully discharged before connecting it to the instrument. Failing to discharge the capacitor may damage the instrument and will be considered misuse. To measure the component, connect the device under test to the test leads or insert it into the test fixture. Press MEAS FUNC to select desired primary measurement of C, L, Z, R or DCR.
Table 3.2 – Primary Parameters Parameter Cs Cp Ls Lp Z Y R G DCR Description Capacitance value measured using a series equivalent circuit model Capacitance value measured using a parallel equivalent circuit model Inductance value measured using a series equivalent circuit model Inductance value measured using a parallel equivalent circuit model Impedance value Admittance value Resistance value using a specified AC frequency and level Conductance value Resistance value using a DC bias.
Parameter Combinations The combinations of primary and secondary parameters, including the series and parallel combinations are listed below: Table 3.4 – Parameter Combinations Primary Parameter Series Mode C Cs-Q Cs-D Cs-R L Ls-Q Ls-D Ls-R Z Y R G Z-θ R-X - Parallel Mode Cp-Q Cp-D Cp-R Cp-G Lp-Q Lp-D Lp-R Lp-G Y-θ G-B Measurement Options The following table lists the measurement parameter options that are configurable for a basic measurement. Table 3.
RANGE Specify the measurement range control SPEED Specify the measurement speed *DCR mode only VRMS, 1 VDC* AUTO, HOLD SLOW, FAST Measurement Display The number of digits of the primary and secondary measurement value can be changed from 2 to 4 digits. Also, the display notation of decimal or scientific can be selected as well. The large display enhances the readability of the measurement. The following table shows display options for the measurement function. Table 3.
Figure 3.11 – Display Function Options 2. Press the softkey options PRI. DIG. or SEC. DIG. to select the number of digits to be displayed for the primary or secondary measurements. Figure 3.12 – Display Function (Primary and Secondary Digits) 3. Press the NOTATION softkey to select the scientific or decimal display.
Figure 3.13 – Display Function (Notation) 4. Press the DISP key again to show large readings on the screen. Figure 3.14 – Display Function (Large Format) 5. Press the DISP key to go back to normal readings display. 3.5 Bin Sorting Function The bin sorting function is very useful for component sorting in component inspection or quality control. It has 9 Primary bins plus a Secondary bin and an Out-of-specification bin. Each bin has high and low limit values.
will increment by one with beep function. The beep can be turned off or used when the component passes or fails specification. The beep tone for each bin is different so that the user can distinguish bins by listening. The bin detection sequence is from low to high. This means that the bin 1 comparator will execute first and if the measured value is not within bin 1’s limits, it will execute the bin 2 comparator and so on.
Figure 3.16 – Bin Setup Absolute Mode Graph Tolerance Mode The tolerance mode allows the user to set high and low limits value by percentage of a nominal value. The following example shows a typical setup of tolerance mode. Figure 3.17 – Bin Mode Table View (Tolerance Mode) The following graph is a visual representation of the Bin tolerance mode setup demonstrated in Figure 3.18.
Figure 3.18 – Bin Setup Tolerance Mode Graph Secondary comparator bin If the measured component primary value is within any of the Primary bin limits and the measured secondary parameter value is not within the Secondary bin limits, the secondary bin count will increment by one. If the measured primary value and secondary value are not within the high/low limits of any bins, the Out bin count will increment by one. Figure 3.
The bin function has three different display screens to present results of the comparisons: Bin, Table, and Histogram. The manual trigger to count can be accessed in any of these displays. Bin Display This screen shows the measured value as well as the compared bin number. Measurement Parameters Measured Values Sorted Bin Total Count Figure 3.20 – Bin Main Display Table Display The table display shows the overall result of the bin function.
Measurement Parameters Sorted Bin Results Bin Limits Table Display Indicator Figure 3.21 – Bin Table Display Histogram Display The screen shows the histogram chart of the bin function result. Measurement Parameters Histogram Chart Histogram Display Indicator Figure 3.
Configure Bin Function The following table shows the different parameters that can be configured in the Bin function. Table 3.
Figure 3.23 - – Bin Mode View (Tolerance Mode) Press the BIN function key again to switch between tolerance and absolute mode. Figure 3.24 – Bin Mode View (Absolute Mode) Press the arrow keys to select the test parameters and use the option softkeys to edit and set them.
Figure 3.25 - Bin Parameter Edit To edit the high/low limits values and comparator ON/OFF for each bin, press DISP key to enter the table display. Use arrow key to activate the cursor and edit the corresponding values. Figure 3.26 – Bin Enable/Disable To start the bin comparator function, do the following steps: 1. Select the desired beep function by press the BEEP softkey. 2. The SWAP softkey will swap the primary and secondary measurement to be the main bin comparison. 3.
4. Connect the component under test to the test leads or insert it into the test fixture. 5. Press the TRIG key to perform a bin comparison and log the corresponding bin count result. 6. Remove the device under test from the test leads or test fixture. 7. Repeat steps 1 – 3 for more components to be tested. 8. Press the STOP softkey to stop the bin comparison. 9. Use the CLEAR softkey to clear the bin count results. NOTE: You may save the bin comparison test results to an external USB flash drive.
Figure 3.27 – Sweep Linear Display Logarithmic Sweep Mode In logarithmic sweep mode, it will sweep the frequency logarithmically from start frequency to stop frequency. The following will be displayed for the “GRAPH” display: Figure 3.28 – Sweep Logarithmic Display Table Display The table display shows the overall result of the linear or logarithmic sweep. It shows the step number, frequency, and component value in a table form.
Using the PG UP or PG DN softkey options will scroll the table up or down. Up to 300 points (depending on sweep settings) can be displayed in table display. If interpolation is turned on, interpolated data will be shown in orange. The result table can be accessed using the DISP function key. Figure 3.29 – Sweep Table Display (with INTERP ON) NOTE: You may save the table sweep results to an external USB flash drive. To do so, please refer to the Save a Measurement Result section.
There are many parameters that may be configured for each sweep. The following table are the different parameters that can be setup in the Sweep function. Table 3.
AUTOSCALE AUTOFREQ INTERP If enabled (ON), the unit will automatically select the HI and LO values (Y-axis) to properly display the frequency sweep on the display graph. If disabled (OFF), the manually set user values will be used. If enabled (ON), the unit will automatically select the start and stop frequency based on an initial analysis of the component connected to the input and the initial start and stop frequency that is set.
4. Use the arrow keys to edit the desired measurement parameters such as level, start frequency, stop frequency, high and low values of the Y-Axis (if AUTOSCALE is ON, the meter will automatically scale the Y-axis), and the step value. Step can be set to 1, 2, 5, and 10 points per sweep step. 5. Turn AUTOFREQ ON if you would like the meter to automatically select the start and stop frequency. 6.
10. After the sweep is completed, the display will show one of the following graphs: Note: When sweep is completed, if you press any of the arrow keys to select or change any of the sweep parameters, all data will be cleared. Figure 3.
Figure 3.32 – Post Logarithmic Sweep Display 11. Use the CURSOR LEFT or CURSOR RIGHT softkeys to change the cursor position of the frequency on the curve to read the measured value at that frequency. Figure 3.33 – Post Sweep Point Selection 12. To view all the points for frequency and component values in a table form, press the DISP function key.
Figure 3.34 - Points Table without Interpolation Figure 3.35 - Points Table with Interpolation 13. When finished, you may clear the sweep data by using the CLEAR softkey option. 4 System The system menu allows the user to view the system information, configure system setup and communication setup. Press the SYSTEM function to enter this submenu.
Figure 4.1 – System Submenu System Information Press the SYSTEM INFO function key to view the system information. The following screen will be shown. Figure 4.
Current Subnet Mask Current Gateway Clear Errors In this menu page, the user also has the ability to clear any errors, as indicated in the bottom right corner of the screen with a red “ERR”, which may occur. To do so, press the CLEAR ERROR option softkey to clear all errors. This has the same effect as sending the “*CLS” command (see SCPI Common Commands section) remotely. Set to Factory Default To set instrument settings to factory default, press the RESET option softkey.
Sweep display Sweep start frequency Sweep stop frequency Sweep Autoscale Sweep step System LCD brightness System beep System Bin Log System communication GPIB address System communication IP mode Linear 20.00 Hz 300.0 kHz On 1 9 On On 01 Auto System Setup To edit the system setup, press the SYSTEM SETUP function key. Use the arrow keys to edit system settings such as date, time, LCD brightness, system beep, Bin Log function, and the Auto Scale for the sweep mode.
Figure 4.3 – System Setup Screen Bin Log When Bin Log setting is enabled (ON) in the System Setup, it allows for the LCR meter to log measurement results directly to the connected USB flash drive. The LCR meter will create a folder called “LOG” in the flash drive and store the bin log files (BLOGxxxx.TXT) in this folder. The feature will work in both absolute mode and tolerance mode.
BIN TOLERANCE Cs-D FREQ 1.000 kHz RANGE AUTO NOM 22.00uF LEVEL 1 VRMS SPEED FAST BIN# LOW LMT HIGH LMT 1 -1.000 % 1.000 % 2 -2.000 % 2.000 % 3 -5.000 % 5.000 % 4 -10.00 % 10.00 % 5 --6 --7 --8 --9 --SEC --TEST RESULT NO. Value BIN# 1 Cs : 22.8uF 3 2 Cs : 22.8uF 3 3 Cs : 22.8uF 3 4 Cs : 22.8uF 3 Date: 2014/04/29 Time: 16:48:01 Figure 4.
Subnet Mask Gateway Set the instrument Subnet Mask Numeric Keys Set the instrument Gateway Numeric Keys Figure 4.5 – Communication Setup Screen For further information on the communication setup, see Interface Configuration section. 5 Save/Recall The 891 has built-in non-volatile memory that can store 10 sets of measurement configurations.
Figure 5.1 – USB Flash Detect Message When the button is selected, the following options screen will appear and allow the user to save a measurement configuration (CONFIG), measurement data results (MEAS), or a screen capture (SCREEN). Figure 5.2 - Save Menu The file folders that store the measurement configuration (CFG), measurement result (RLT), and LCD screen (BMP) will be created by the LCR meter and stored on the USB flash drive.
Save/Recall a Measurement Configuration The following measurement parameters will be saved or recalled during this operation. Table 5.
Sweep step Sweep swap of primary and secondary Sweep Autoscale System LCD brightness System beep System communication GPIB address System communication IP mode of manual or auto System communication IP address System communication subnet mask System communication gateway address The file name of the measurement configuration is 891CFGxx.CFG, where the xx represents the location (00 to 99) in internal non-volatile memory or external USB flash drive.
Indicates internal memory or external USB flash drive Filename to be saved Figure 5.3 – Save Configuration Pop-Up Window Use the numeric keypad to edit the desired location from 00 to 99 in the memory, from 00 to 09, Press SAVE softkey option to execute the save function or press ABORT to close the save configuration pop-up window. The “891CFGxx.CFG File Saved !” message will be displayed on the screen, if saved successfully, a message will pop up as shown below. Figure 5.
window. Figure 5.5 – Recall Configuration Pop-Up Window Use the numeric keypad to enter the desired file number to be recalled or use the NEXT FILE softkey option to select the next available configuration file that has been stored in the internal memory or external flash drive. Press the EXEC softkey option to execute the recall configuration file or press the ABORT softkey option to close the recall configuration pop-up window.
SINGLE MEASUREMENT ------------------------Date: 2014/04/29 Time: 16:37:55 FREQ : 1.010 kHz LEVEL : 1 VRMS RANGE : AUTO SPEED : SLOW Cs : 45.02 uF D : 0.174 Figure 5.6 – Single Measurement Text Result BIN TOLERANCE MEASUREMENT ------------------------Date: 2014/04/29 Time: 16:41:40 FUNC Cs-D FREQ 1.010 kHz RANGE AUTO NOM 47.00uF LEVEL 1 VRMS SPEED SLOW BIN# RESULT ON/OFF LOW LMT HIGH LMT 1 0 ON -1.000 % 1.000 % 2 0 ON -2.000 % 2.000 % 3 0 ON -3.000 % 3.000 % 4 2 ON -4.000 % 4.000 % 5 5 ON -5.000 % 5.
BIN ABSOLUTE MEASUREMENT -----------------------Date: 2014/04/29 Time: 16:42:01 FUNC Cs-D FREQ 1.010 kHz RANGE AUTO LEVEL 1 VRMS SPEED SLOW BIN# RESULT ON/OFF LOW LMT HIGH LMT 1 6 ON 43.00uF 43.50uF 2 2 ON 43.50uF 44.00uF 3 5 ON 44.00uF 44.50uF 4 1 ON 44.50uF 45.00uF 5 1 ON 45.00uF 45.50uF 6 0 ON 45.50uF 46.00uF 7 0 ON 46.00uF 46.50uF 8 0 OFF --9 0 OFF --SEC 0 ON 0.010 0.100 OUT 0 Figure 5.
To save the test result, first, make the measurement of desired test such as single measurement, bin, or sweep. Press the key and press the SAVE MEAS softkey option to show the save measurement pop-up window. The file name of the measurement result is 891RLTxxx.TXT, where xxx represents 000 to 999 locations in the external USB flash drive. Figure 5.10 – Save Measurement Pop-Up Window Use the numeric keypad to edit the desired location from 000 to 999 in the memory.
Figure 5.11 – Save Screenshot Pop-Up Window Use the numeric keypad to edit the desired location from 000 to 999 in the memory. Press the SAVE softkey option to execute the save function. Or, press ABORT to close the save screen pop-up window. If saved successfully, the “891SCRxxx.BMP File Saved !” message will be displayed on the screen.
6 Remote Interface The instrument comes with USB (virtual COM), GPIB, and LAN interfaces for remote control. This chapter will describe how users can remotely operate the instrument and use SCPI (Standard Commands for Programmable Instruments) commands over any one of these remote interfaces. NOTE: The green RMT indicator will appear on the lower right of the display when the LCR meter is successfully connected to a PC remotely through any remote interface.
The USB interface does not support hardware flow control (only transmit, receive, and ground pins are used). The programmer should be aware of this limitation and notice the command process time of the LCR meter. If the remote commands are sent too fast to the LCR meter, the internal buffer may overrun and cause a communication error. Therefore, adding a delay between commands is necessary to allow time for the meter to process. GPIB The GPIB address of the LCR meter can be configured from 1-30.
1. From the SYSTEM menu, select the COMM SETUP function key. 2. From the COMM SETUP menu, press the down arrow key multiple times to highlight the IP Mode parameter. You have the option between AUTO and MANU. Selecting AUTO will allow the unit to request an IP Address, Subnet Mask, and Gateway automatically in order to communicate properly. No other configuration is necessary once AUTO is selected.
Current IP Address Figure 6.1 – Current IP Address 3. Type the IP address of the LCR meter in the URL bar of your browser with http:// prefix (i.e. http://192.168.1.55 for IP Address 192.168.1.55). 4. If correctly configured, the following screen will be shown: Figure 6.
5. A password is required to login and access the menu items on the page. The default admin password is 123456. The web server menu items are described below: - HOME The HOME page provides general information of the LCR meter: Model Number, Manufacturer, Firmware version, Front USB ID/product, MAC address, and IP address. Figure 6.3 – Web Server Home Page - CONFIG The CONFIG page provides the setting of date, time, and brightness.
Figure 6.4 – Web Server Configuration Page - CONTROL The CONTROL page provides the general control of the LCR meter such as measurement function, test frequency, test level, range, and speed. The real time measurement result is shown on this page. The command line to send and receive SCPI commands can also be accessed here. Figure 6.5 – Web Server Control Page Log Out will exit the web page and go back to the login screen.
Telnet Connection The instrument can be connected via LAN (Ethernet) interface using Telnet client with the following socket port 5024. Socket Connection Socket connection is available for communication via LAN (Ethernet) interface. Users can use socket port 5025 to open a raw socket connection for sending remote commands. Note: The TCP protocols are used to communicate with the instrument.
Integer value, can be zero, positive or negative integer number Flexible numerical value, can be zero, positive or negative float point numeric value String value, characters enclosed in single or double quotes New line, hex code 0x0Ah Return, hex code 0x0Dh All commands should be ended with the and and there should be a space between command and numeric parameter. 6.3 Error/Event List SCPI can offer an error/event list that contains up to 10 errors/events.
6.4 SCPI Common Commands The instrument is compatible with most of the common IEEE-488.2 and SCPI commands. Common commands generally control overall LCR meter functions, such as reset, status, and synchronization. All common commands consist of a three-letter mnemonic preceded by an asterisk (*). Commands ended with question mark (?) represent a query command. The following table lists the common SCPI commands supported: Table 6.
:OPEN :SHORt BIN :ABSolute :COMParator :BIN[1-9] :SECondary :COUNt :CLEar :DATA? :LIMit :BIN[1-9] :SECondary Execute open calibration Execute short calibration BIN subsystem Absolute mode Set or return the bin[1-9] comparator on or off switch Set or return the secondary bin comparator on or off Clear bin counts Return the bin counts of bin 1, bin 2 , …, bin 9 , out of specification bin and secondary bin Set or return the limit
:TABle :HISTogram :MODE :STARt :SWAP :TOLerance :COMParator :BIN[1-9] :SECondary :COUNt :CLEar Set or return f
:DATA? Return the bin counts of bin 1, bin 2 , …, bin 9 , out of specification bin and secondary bin :LIMit :BIN[1-9] Set or return the limit value of the bin[1-9], = :SECondary Set or return the limit value of secondary bin = :NOMinal Set or return the nominal value of tolerance mode :TRIGger Trigger a measurement of bin count DISPlay Display subsystem :FONT
LSD/8 | LSR/9 | LPQ/10 | LPD/11 | LPR/12 | LPG/13 | ZTH/14 | YTH/15 | RX/16 | GB/17 | DCR/18 | ? > :RANGe < HOLD/0 | AUTO/1 Set or return the measurement range | ?> control RESUlt? Return the measured (raw data) primary and secondary reading :SPEEd RECall Recall subsystem :CONFiguration Recall configuration parameters from internal memory (CFG00.CFG-CFG09.CFG) or external USB flash disk (CFG10.CFGCFG99.
:LIMit :MODE :LINear :GRAPh :TABle :LOGarithm :GRAPh
RX/16 | GB/17 | ?> :TABle CSQ/0 | CSD/1 | CSR/2 | CPQ/3 | CPD/4 | CPR/5 | CPG/6 | LSQ/7 | LSD/8 | LSR/9 | LPQ/10 | LPD/11 | LPR/12 | LPG/13 | ZTH/14 | YTH/15 | RX/16 | GB/17 | ?> :FREQuency :STARt :STOP Set or return function in sweep log table mode Set or return sweep start frequency Set or return sweep stop frequency :STEP :STARt :SWAP Set or return sweep steps Set or return sweep start running status Set or return the sweep primary and secondary swap p
:MEASurement :SCReen SYStem :DATE :BEEPer :BRIGhtness :ERRor? :GPIB :ADDRess :IP :ADDRess :CONFig :GATEway :MASK :TIME Save measurement result to external USB flash disk (RLT00.TXT-RLT99.TXT) Save screen to external USB flash disk (SCR000.BMP-SCR999.
7 Troubleshooting Guide Below are some frequently asked questions and answers. Please check if any apply to your instrument before contacting B&K Precision. Q: I cannot power up the instrument - Check that the power cord is securely connected to the AC input and there is live power from your electrical AC outlet. - Check and confirm that the correct fuse is inserted and not blown. - Verify that the AC power coming from the mains is the correct voltage.
8 Specifications Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C. Specifications are subject to change without notice.
Test Signal Frequency Resolution Accuracy Test Signal Level AC Level Range Accuracy Output impedance DC Level Range Accuracy Output impedance 20 Hz to 300 kHz 0.01 Hz (20.00 Hz to 99.99 Hz) 0.1 Hz (100.0 Hz to 999.9 Hz) 1 Hz (1.000 kHz to 9.999 kHz) 10 Hz (10.00 kHz to 99.99 kHz) 100 Hz (100.0 kHz to 300.0 kHz) ± 0.1% 0.
Measurement Accuracy Best accuracy : 0.05% Impedance (Z) Accuracy: 𝑍𝑎𝑒 Frequency Impedance 0.1 Ω – 1 Ω 1 Ω – 100 Ω 100 Ω – 1 kΩ 1 kΩ – 10 kΩ 10 kΩ – 100 kΩ 100 kΩ – 1 MΩ 1 MΩ – 10 MΩ 10 MΩ – 20 MΩ DC, 20 Hz – 1 kHz 1 kHz – 10 kHz 10 kHz – 100 kHz 100 kHz – 200 kHz 200 kHz – 300 kHz 1% ± 1 0.5% ± 1 0.2% ± 1 0.05% ± 1 0.2% ± 1 0.5% ± 1 2% ± 1 4% ± 1 1% ± 1 0.5% ± 1 0.2% ± 1 0.2% ± 1 0.2% ± 1 0.5% ± 1 2% ± 1 5% ± 1 2% ± 1 1% ± 1 0.5% ± 1 0.5% ± 1 1% ± 1 2% ± 1 5% ± 1 -- 5% ± 1 2% ± 1 0.
Dx: Measured D value Lae: Relative Accuracy of L 3. Resistance (R) Accuracy: 𝑅𝑎𝑒 Refer to - Measurement Accuracy Chart for Zae Rae: 𝑋𝑥 × 𝑍𝑎𝑒 Xx: Measured X value Zae: Relative Accuracy of Z 4. Conductance (G) Accuracy: 𝐺𝑎𝑒 Refer to - Measurement Accuracy Chart for Zae when 𝑄𝑥 ≤ 0.1, 𝑍𝑎𝑒 when 𝑄𝑥 > 0.1, 𝑍𝑎𝑒 × (1 + 𝑄𝑥) Qx: Measured Q value Zae: Relative Accuracy of Z 5. Admittance (Y) Accuracy: 𝑌𝑎𝑒 Refer to - Measurement Accuracy Chart for Zae Yae: 𝑍𝑎𝑒 6.
Example: Frequency: 1 kHz; Level: 1 VRMS; Measured Cx Value: 15 μF; Dx: 0.122 Step 1: Find Cae; Refer to - Measurement Accuracy Chart Cae = Zae = ±0.5% Step 2: Find Dae; Dx > 0.1 Zae × (1 + Dx2) = ×0.005𝑥 1 + (0.1222)2 = 0.005037 = ±0.5037% 7. Quality factor (Q) Accuracy: 𝑄𝑎𝑒 Refer to - Measurement Accuracy Chart for Zae when 𝑄𝑥 × 𝐷𝑎𝑒 ≥ 1, 𝑍𝑎𝑒 𝑄𝑥 2 × 𝐷𝑎𝑒 when 𝑄𝑥 × 𝐷𝑎𝑒 < 1, ± 1 ∓𝑄𝑥 × 𝐷𝑎𝑒 Qx: Measured Q value Dae: Relative Accuracy of D Zae: Relative Accuracy of Z Example: Frequency: 500 Hz; Level: 0.
Zae: Relative Accuracy of Z 9. Phase Angle (θ) Accuracy: 𝜃𝑎𝑒 Refer to - Measurement Accuracy Chart for Zae 180 θae: ± 𝜋 × 𝑍𝑎𝑒 Zae: Relative Accuracy of Z Example: Frequency: 500 Hz; Level: 1 VRMS; Measured Lx Value: 100 uH Step 1: Find Lae; Refer to - Measurement Accuracy Chart Lae = Zae = ±1% 180 180 Step 2: Find θae; ± × 𝑍𝑎𝑒 = ± × 0.01 = ±0.573° 𝜋 𝜋 Note: If calculated θae ≤ 0.2°, θae = 0.
Add +/- LSD of the measured value to the percentage shown on the chart below (i.e.
Figure 8.
SERVICE INFORMATION Warranty Service: Please go to the support and service section on our website at bkprecision.com to obtain a RMA #. Return the product in the original packaging with proof of purchase to the address below. Clearly state on the RMA the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Non-Warranty Service: Please go to the support and service section on our website at bkprecision.com to obtain a RMA #.
LIMITED THREE-YEAR WARRANTY B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free from defects in workmanship and materials for a period of three years from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form of a sales receipt.
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