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GDM-360/397/398/461 User Manual

45

The BLUE button

It is used for selecting the required measurement function when there is more than
one function at one position of the rotary switch.

Turning on the Display Backlight (GDM-360/397/398 only)

Warning

In order to avoid mistakes arising from misread readings in insufficient light,
please use the backlight function.



Press and hold the

HOLD/LIGHT

button (yellow button) for over 2 seconds to

turn the display backlight on.



The display backlight will automatically turn off around after 10 seconds.

Sleep Mode (GDM-360/397/398 only)

To preserve battery life, the Meter automatically turns off if you do not turn the
rotary switch or press any buttons after 15 minutes.

The Meter can be “woken up” by turning the rotary switch or pressing any button.

To disable the Sleep Mode function, press

BLUE

button while turning on the Meter.

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Содержание GDM-360

Страница 1: ...Handheld Digital Multimeter GDM 360 GDM 397 GDM 398 GDM 461 USER MANUAL GW INSTEK PART NO 82DM 46100MA1 ISO 9001 CERTIFIED MANUFACTURER...

Страница 2: ...another language without prior written consent The information in this manual was correct at the time of printing However we continue to improve our products and therefore reserve the right to change...

Страница 3: ...ional Buttons 12 Display Symbols 13 MEASUREMENT OPERATION 16 A DC AC Voltage Measurement 16 B DC AC Current Measurement 19 C Resistance Measurement 22 D Testing for Continuity 25 E Testing Diodes 27 F...

Страница 4: ...the Display Backlight GDM 360 397 398 only 45 Sleep Mode GDM 360 397 398 only 45 GENERAL SPECIFICATIONS 46 Accuracy Specifications 48 DC Voltage 48 AC Voltage 50 DC Current 53 AC Current 56 Resistanc...

Страница 5: ...Table of Contents 3 Replacing the Fuses 71 USB and RS232C Serial Port 73...

Страница 6: ...98 and GDM 461 True RMS hereafter referred to as the Meter are auto ranging multimeters The Meter can measure AC DC Voltage and Current Resistance Diode Continuity Buzzer Capacitance Frequency and Tem...

Страница 7: ...erature Probe thermocouple GDM 397 only 1 piece 4 Multi Purpose Socket 1 piece 5 9V Battery NEDA1604 6F22 or 006P built in 1 piece 6 RS232C Interface Cable Except GDM 398 1 piece 7 USB Interface Cable...

Страница 8: ...IV Primary supply level overhead lines cable systems etc Use the Meter only as specified in this User Manual otherwise the protection provided by the Meter may be impaired In this manual a Warning id...

Страница 9: ...insulation around the connectors Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads with those of the same type before using...

Страница 10: ...continuity and diodes Before measuring current check the Meter s fuses and turn off the current that is to be tested before connecting the Meter to the circuit After connecting the circuit reliably t...

Страница 11: ...indoor use Turn the Meter off when it is not in use and take out the battery when not using it for a long time Constantly check the battery as it may leak when it has not been used for some time repl...

Страница 12: ...OVERVIEW 10 The Meter Structure see figure 1 1 LCD display 1 2 3 4 5 6 2 Functional buttons 3 Yellow button 4 Blue button 5 Rotary switch 6 Input terminals figure 1...

Страница 13: ...C Voltage Measurement GDM 360 only V DC Voltage Measurement GDM 360 only Resistance Measurement Diode Test Continuity Test Capacitance Test Hz Frequency and Duty Cycle Test C Temperature in Celsius GD...

Страница 14: ...ency and duty cycle measurement RANGE Press RANGE to enter the manual ranging mode the Meter beeps Press RANGE to step through the ranges available for the selected function the Meter beeps Press and...

Страница 15: ...s to exit Peak mode CAL means the meter has entered self calibration mode Display Symbols No Symbol Meaning 1 Data hold is active 2 Sleep Mode indicator 3 Indicates negative reading 4 AC Indicator for...

Страница 16: ...ce the battery as soon as the battery indicator appears 15 Sensor test is in progress 16 The REL function is on The Meter displays the stored value minus the measured value 17 k M Ohm The unit of resi...

Страница 17: ...r 0 000001 farads nF Nanofarad 1 x 10 9 or 0 000000001 farads C F C Centigrade The unit of temperature F Fahrenheit The unit of temperature Hz kHz MHz Hz Hertz The unit of frequency in cycles second k...

Страница 18: ...ENT OPERATION A DC AC Voltage Measurement see figure 2 V GDM 360 397 398 A V GDM 461 figure 2 Note The GDM 360 doesn t have an AC DC voltage range V It does however have an AC DC mV range mV and separ...

Страница 19: ...e COM terminal 2 Set the rotary switch to V DC measurement is the default or press the BLUE button to switch between DC and AC measurement mode Connect the test leads across to the DUT The measured va...

Страница 20: ...lly to enter mV range For the GDM 397 The AC DC voltage measurement ranges and the AC DC mV measurement ranges are separated When the rotary switch is in the AC DC voltage position V the RANGE button...

Страница 21: ...GDM 360 397 398 461 User Manual 19 B DC AC Current Measurement see figure 3 A GDM 360 397 398 A GDM 461 figure 3...

Страница 22: ...do not connect them in parallel to any circuit To measure current do the following 1 Insert the red test lead into the mA or A input terminal and the black test lead into the COM terminal 2 Set the r...

Страница 23: ...of the current to be measured is unknown set to the highest range and reduce the range step by step until a satisfactory reading is obtained For safety the measurement time for currents greater than...

Страница 24: ...MEASUREMENT OPERATION 22 C Resistance Measurement see figure 4 mAuA COM V Hz figure 4...

Страница 25: ...easure resistance connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to resistance measurement is the defau...

Страница 26: ...see that the test leads are properly connected and are not loose For high resistance measurements 1M it is normal to take several seconds to obtain a stable reading To obtain a stable reading use test...

Страница 27: ...GDM 360 397 398 461 User Manual 25 D Testing for Continuity see figure 5 figure 5...

Страница 28: ...o the terminal and the black test lead into the COM terminal 2 Set the rotary switch to and press BLUE button to select measurement mode 3 The buzzer sounds continuously if the resistor to be tested i...

Страница 29: ...GDM 360 397 398 461 User Manual 27 E Testing Diodes see figure 6 figure 6...

Страница 30: ...ead into the COM terminal 2 Set the rotary switch to and press BLUE button to select the measurement mode 3 For forward voltage drop readings on any semiconductor component place the red test lead on...

Страница 31: ...to indicate that the diode being tested is open or that the polarity is reversed The Meter will display the forward voltage drop in voltage V units When diode testing has been completed disconnect the...

Страница 32: ...MEASUREMENT OPERATION 30 F Capacitance Measurement see figure 7 mAuA V Hz figure 7...

Страница 33: ...7 398 press BLUE button to select the nF measurement mode At that time the Meter will display a fixed value as shown below which is the internal capacitance of the Meter To ensure accuracy when measur...

Страница 34: ...It takes a longer time to measure a capacitance of more than 100 F The LCD displays OL to indicate that the tested capacitor is shorted or it exceeds the maximum range When capacitance measurement ha...

Страница 35: ...GDM 360 397 398 GDM 461 figure 8 Warning To avoid personal harm do not attempt to input more than 30V rms when testing frequency To measure frequency connect the Meter as follows 1 Insert the red test...

Страница 36: ...ellow button GDM 461 to select measurement mode Note Input Amplitude DC offset is zero GDM 360 397 398 When 10Hz 10MHz 200mV a 30Vrms GDM 461 When 10Hz 10MHz 300mV a 30Vrms When 10MHz 40MHz 400mV a 30...

Страница 37: ...GDM 360 397 398 461 User Manual 35 H Temperature Measurement GDM 397 only see figure 9 figure 9...

Страница 38: ...e probe to the object being measured After few seconds the measured value shows on the display 4 Press BLUE button to toggle between C and F temperature Note To avoid measurement errors especially low...

Страница 39: ...GDM 360 397 398 461 User Manual 37 I Transistor hFE Measurement GDM 398 only see figure 10 figure 10...

Страница 40: ...ut terminal as shown on figure 10 3 Insert the transistor to be tested into the corresponding multi purpose socket jacks 4 The LCD will display hFE nearest value Note When transistor measurement has b...

Страница 41: ...GDM 360 397 398 461 User Manual 39 J EF Function GDM 398 only see figure 11 figure 11...

Страница 42: ...the test lead from the input terminals 2 Place the front part of the housing with the marking towards the object being measured 3 There will be three types of displays LCD displays different size of...

Страница 43: ...t use Hold mode to determine if circuits are without power The Hold mode will not capture unstable or noisy readings The Hold mode is applicable to all measurement functions Press HOLD to enter Hold m...

Страница 44: ...ss MAX MIN to start recording of maximum and minimum values Steps the display through high MAX and low MIN readings The Meter enters manual ranging mode after pressing MAX MIN button Press and hold MA...

Страница 45: ...on for over 2 seconds to enter or exit RS232C or USB mode The sleep mode feature will be disabled after entering RS232C or USB mode the icon on the LCD will disappear GDM 397 360 398 only Note for the...

Страница 46: ...lays the result For instance if the stored value is 20 0V and the present measurement value is 22 0V the reading would be 2 0V If a new measurement value is equal to the stored value then the reading...

Страница 47: ...e use the backlight function Press and hold the HOLD LIGHT button yellow button for over 2 seconds to turn the display backlight on The display backlight will automatically turn off around after 10 se...

Страница 48: ...l 600mAH 1000V 6 35x31 8mm Fused Protection for 10A Input Terminal 10A H 1000V 10 3x38 1mm Display GDM 397 398 Maximum reading 4000 frequency 9999 analogue bar graph 41 segments GDM 360 Maximum readin...

Страница 49: ...50 30 C 40 C Battery Type 9V NEDA1604 or 6F22 or 006P Under the presence of electromagnetic fields the instrument may have measurement errors Measurement will return to normal when the interference is...

Страница 50: ...for 1 year Operating temperature 18 C 28 C Relative humidity 75 DC Voltage GDM 397 398 Range Resolution Accuracy Input Impedance Fixed Value Input GDM 398 GDM 397 40mV 0 01mV 0 8 3 Around 3000M 1000V...

Страница 51: ...0 01mV 0 8 3 Around 3000M 1000V dc ac Vpp 600mV 0 1mV 0 8 3 6V 0 001V 0 5 1 Around 10M 60V 0 01V 600V 0 1V 1000V 1V 1 0 3 GDM 461 Range Resolution Accuracy Input Impedance Fixed Value Input 220mV 0 0...

Страница 52: ...5 400Hz Input Impedance Fixed Value Input GDM 398 GDM 397 40mV 0 01mV 1 2 5 Around 3000M 1000V dc 750Vrms ac 400mV 0 1mV 1 0 3 4V 0 001V Around 10M 40V 0 01V 400V 0 1V 750V 1V 1 2 5 Displays effective...

Страница 53: ...2 0 5 Around 3000M 1000V dc 750Vrms ac 600mV 0 1mV 6V 0 001V 1 0 3 1 5 5 Around 10M 60V 0 01V 600V 0 1V 750V 1V 1 2 5 3 0 5 GDM 360 True RMS is applicable from 10 of range to 100 of range AC crest fa...

Страница 54: ...5 50 Around 3000M 1000V dc 750Vrms ac 2 2V 0 0001V 0 8 10 1 2 50 Around 10M 22V 0 001V 220V 0 01V 2 0 50 750V 0 1V 1 2 10 3 0 50 True RMS is applicable from 10 of range to 100 of range AC crest facto...

Страница 55: ...1 A 1 0 2 Fuse 1 F600mA H 1000V 6 35 x 31 8mm 4000 A 1 A 40mA 0 01mA 1 2 3 400mA 0 1mA 4A 0 001A 1 5 3 Fuse 2 F10A H 1000V 10 3 x 38 1mm 10A 0 01A Remarks When 5A Continuous measurement is allowed Whe...

Страница 56: ...Fuse 1 F600mA H 1000V 6 35 x 31 8mm 6000 A 1 A 60mA 0 01mA 600mA 0 1mA 6A 0 001A 1 2 5 Fuse 2 F10A H 1000V 10 3 x 38 1mm 10A 0 01A Remarks When 5A Continuous measurement is allowed When 5A Continuous...

Страница 57: ...0 5 10 Fuse 1 F600mA H 1000V 6 35 x 31 8mm 2200 A 0 1 A 22mA 0 001mA 220mA 0 01mA 10A 0 001A 1 2 50 Fuse 2 F10A H 1000V 10 3 x 38 1mm Remarks When 5A Continuous measurement is allowed When 5A Continu...

Страница 58: ...mA H 1000V 6 35 x 31 8mm 4000 A 1 A 40mA 0 01mA 1 5 5 400mA 0 1mA 4A 0 001A 2 0 5 Fuse 2 F10A H 1000V 10 3 x 38 1mm 10A 0 01A Remarks When 5A Continuous measurement is allowed When 5A Continuous measu...

Страница 59: ...5 600mA 0 1mA 6A 0 001A 2 0 5 3 0 5 Fuse 2 F10A H 1000V 10 3 x 38 1mm 10A 0 01A Remarks When 5A Continuous measurement is allowed When 5A Continuous measurement for less than 10 seconds with interval...

Страница 60: ...5 50 220mA 0 01mA 10A 0 001A 1 5 10 1kHz 5kHz Fuse 2 F10A H 1000V 10 3 x 38 1mm 2 0 50 Remarks When 5A Continuous measurement is allowed When 5A Continuous measurement for less than 10 seconds with in...

Страница 61: ...sistance GDM 397 398 Range Resolution Accuracy Overload Protection Remark 400 0 1 1 2 2 1000V dc ac Vpp When measuring below 2k apply REL to ensure measurement accuracy 4k 0 001k 1 0 2 40k 0 01k 400k...

Страница 62: ...GDM 360 Range Resolution Accuracy Overload Protection Remark 600 0 1 1 2 2 1000V dc ac Vpp When measuring below 2k apply REL to ensure measurement accuracy 6k 0 001k 1 0 2 60k 0 01k 600k 0 1k 6M 0 00...

Страница 63: ...Range Resolution Accuracy Overload Protection Remark 220 0 01 0 5 10 1000V dc ac Vpp When measuring below 2k apply REL to ensure measurement accuracy 2 2k 0 0001k 22k 0 001k 220k 0 01k 2 2M 0 0001M 0...

Страница 64: ...GDM 397 398 Range Resolution Accuracy Overload Protection Remark 40nF 0 01nF 3 0 5 1000V dc ac Vpp There is around 10nF residual reading when the circuit is open 400nF 0 1nF 4 F 0 001 F 40 F 0 01 F 40...

Страница 65: ...GDM 360 Range Resolution Accuracy Overload Protection Remark 40nF 0 01nF 3 0 5 1000V dc ac Vpp There is around 10nF residual reading when the circuit is open 400nF 0 1nF 4 F 0 001 F 40 F 0 01 F 400 F...

Страница 66: ...mark 22nF 0 001nF 3 0 5 1000V dc ac Vpp There is around 50pF residual reading when the circuit is open To measure a small value of capacitance use REL to ensure accuracy 220nF 0 01nF 2 2 F 0 0001 F 22...

Страница 67: ...offset is zero GDM 360 397 398 When 10Hz 10MHz 200mV a 30Vrms GDM 461 When 10Hz 10MHz 300mV a 30Vrms When 10MHz 40MHz 400mV a 30Vrms When 40MHz unspecified When measuring on line frequency or duty cy...

Страница 68: ...ion GDM 360 397 398 0 1 1000Vdc ac Vpp GDM 461 0 01 GDM 360 397 398 Open circuit voltage is around 0 45V Broken circuit resistance value is around 35 the buzzer does not beep Good circuit resistance v...

Страница 69: ...0Vdc ac Vpp 20 0 C 1 2 4 0 100 C 1 2 3 100 1000 C 2 5 2 F 1 F 40 4 F 8 6 4 32 F 1 2 5 32 212 F 1 2 4 212 1832 F 2 5 3 Thermocouple It is suitable to use K type thermocouples The included K type thermo...

Страница 70: ...n performance test and service information To avoid electrical shock or damage to the Meter do not get water inside the case General Service Periodically wipe the case with a damp cloth and mild deter...

Страница 71: ...97 398 461 User Manual 69 Do not use or store the Meter in a place of humidity high temperature or in the presence of explosives inflammable materials and strong magnetic fields Replacing the Battery...

Страница 72: ...ng the case bottom To replace the battery See figure 12 1 Turn the Meter power off and remove all connections from the terminals 2 Remove the screw from the tilt stand and the battery compartment and...

Страница 73: ...GDM 360 397 398 461 User Manual 71 Replacing the Fuses figure 13...

Страница 74: ...r power off and remove all the connections from the terminals 2 Remove the screw from the tilt stand and the battery compartment and separate the battery compartment and the tilt stand from the case b...

Страница 75: ...nd reinstall the screw 7 Rejoin the tilt stand battery compartment and case bottom and reinstall the screw USB and RS232C Serial Port USB is optional at extra cost Please refer to the Installation Gui...

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