Manual

ManualsBrandsGW Instek ManualsEquipmentGDM-8245

DUAL DISPLAY DIGITAL

MULTIMETER

MODEL: GDM-8245

User Manual

Good Will Instrument Co., Ltd.

GW Part No. 82DM-82450MI

Declaration of Conformity

GOOD WILL INSTRUMENT CO., LTD.

No. 7-1, Jhongsing Rd, Tucheng City, Taipei County 236. Taiwan

GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.

No.69 Lushan Road, Suzhou New District Jiangsu, China.

declares that the below mentioned product

GDM-8245

is herewith confirmed to comply with the requirements set out in the Council Directive

on the Approximation of the Law of Member States relating to Electromagnetic

Compatibility (89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Equipment

Directive (73/23/EEC, 93/68/EEC).

For the evaluation regarding the Electromagnetic Compatibility and Low Voltage

Equipment Directive, the following standards were applied:

◎ EMC

EN 61326-1: Electrical equipment for measurement, control and laboratory use ––

EMC requirements (1997+A1: 1998)

Conducted and Radiated Emissions

EN55011 Group II class B: 1998

Electrostatic Discharge

EN 61000-4-2: 1995

Current Harmonic

EN 61000-3-2: 1995

Radiated Immunity

EN 61000-4-3: 1996

Voltage Fluctuation

EN 61000-3-3: 1995

Electrical Fast Transients

EN 61000-4-4: 1995

-------------------------

Surge Immunity

EN 61000-4-5: 1995

-------------------------

Conducted Susceptibility

EN 61000-4-6: 1996

-------------------------

Voltage Dips/ Interrupts

EN 61000-4-11: 1994

◎ Safety

Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC

IEC/EN 61010-1: 2001

Summary of content (13 pages)

PAGE 1
Declaration of Conformity DUAL DISPLAY DIGITAL MULTIMETER MODEL: GDM-8245 User Manual We GOOD WILL INSTRUMENT CO., LTD. No. 7-1, Jhongsing Rd, Tucheng City, Taipei County 236. Taiwan GOOD WILL INSTRUMENT (SUZHOU) CO., LTD. No.69 Lushan Road, Suzhou New District Jiangsu, China.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL TABLE OF CONTENTS DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL PAGE 1. SAFETY SUMMARY……………………………………………… 1 2. INTRODUCTION………………………………………………….. 5 3. SPECIFICATION………………………………………………….. 6 4. OPERATION INSTRUCTION……………………………………. 11 5. MEASUREMENT TUTORIAL…...………………………………. 14 6. MEASUREMENT TECHNIQUES......…………………………… 18 7. MAINTENANCE…………………………………………………... 22 1.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL FOR UNITED KINGDOM ONLY DANGER High Voltage NOTE: This lead/appliance must only be wired by competent persons ATTENTION refer to Manual WARNING: THIS APPLIANCE MUST BE EARTHED IMPORTANT: The wires in this lead are coloured in accordance with the following code: Protective Conductor Terminal Green/ Yellow: Earth Blue: Neutral Brown: Live(Phase) (ground) Earth Terminal Frame or Chassis Terminal As the colours of th
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL terminal which is marked with the letter N or coloured Blue or Black. 2. INTRODUCTION The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red. If in doubt, consult the instructions provided with the equipment or contact the supplier.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 3.SPECIFICATIONS RANGE 500mV 5V 50V 500V 1000V The specifications are operated under the essential conditions as follows: z A 1-year calibration cycle. z An operating temperature of 18 to 28℃ (64.4 to 82.4℉) z Relative humidity not exceeding 75% z Accuracy is expressed as ±(percentage of reading + digits). z The AC specification is based on the 50% of duty cycle. 1.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 500μA,5mA,50mA,500mA,2A 5 ranges fuse protection. 20A range no fuse,15 seconds max. When the input exceeds the full scale of the selected range, the display will appear “—OL—“ of over-range indication. 5. TRUE RMS AC OR AC+DC CURRENT Accuracy Between 2% of range and full range. RANGE 20Hz-45Hz 45Hz-2kHz 2kHz-10kHz 10kHz-20kHz Protection 500μA 1%+15 0.5%+15 1%+15 2%+15 5mA 1%+15 0.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 4. OPERATION INSTRUCTIONS 10. CONTINUITY BEEPER Description Built in buzzer sounds if conductance is less than 5 ohm. Open Voltage 3 volts maximum. Protection 450V dc or peak ac continuous. 11. ENVIRONMENTAL Indoor use, altitude up to 2000m. Ambient Temperature 0℃ to 50℃. Operation Relative Humidity 75% (Maximum). Environment Installation category II Pollution Degree 2 -40℃ to 70℃.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL z Figure 4-1 Front Panel 4-6 Input overload protection The maximum allowable input is shown as table 4-1. Please proceed the measurement accordingly.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 5. MEASUREMENT TUTORIAL 5-3. Resistance, capacitance, continuity beeper measurements 1).Press the button to select function. 2).Press [▲]or[▼]to the desired range. Press [AUTO/MAN] button to 5-1. Voltage measurements (DCV, ACV, DCmV, ACmV) 1).Press the button to select desired function. 2).
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL For example, if [dBm] is pressed when measuring voltage in the max mode, the maximum value is converted to dBm. To release the dBm function, press [dBm] again. The dBm mode and AC+Hz mode are not selected concurrently. The standard reference impedance of the instrument is 600Ω. 5-6. AC+Hz measurements The function can be selected only when ac range is selected.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 6.MEASUREMENT TECHNIQUES z Figure 6-1: Voltage Conversion 6-1 dBm measurement technique dBm is defined as above or below a 1mW reference. A voltage measurement is converted to dBm using the following formula: dBm=10*log 10 (1000*voltage value2/reference impedance.) The standard reference impedance of the instrument is 600Ω. For example, 0.7746V will be convert to 0 dBm.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL z Figure 6-2: Crest Factor 6-3 AC+DC measurement A signal includes an ac component and a dc level. The relationship between the total rms value of the signal and the ac component and the dc component is: rms total= ( ac component rms) 2 + (dc component) 2 6-4 Crest factor Crest factor is often overlooked in determining the accuracy of an ac measurement.
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DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL DUAL DISPLAY DIGITAL MULTIMETER USER MANUAL 7.MAINTENANCE 7-3 Line voltage conversion The primary winding of the power transformer is tapped to permit operation from 100/120V, or 230V AC 50/60Hz line voltage. Conversion from one line voltage to another is done by changing the line voltage selector switch as shown in Figure 4-2. The rear panel identifies the line voltage to which the unit was factory set.