GW Instek GCM-407 User Manual Download Page 8

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6. Diode Test ( )

7. Capacitance ( )

Display: True RMS AC voltage; applicable for

ranges from 10% to 100%.

Voltage: Input impedance ≥ 10MΩ;

Frequency response: 40~400Hz

3. DC Voltage ( )

Input impedance ≥10MΩ

4. Resistance ( Ω )

5. Continuity Test ( )

GCM-407 User Manual

Open-circuit

voltage is

approx. 3.3V,

measurable PN

forward bias ≤

3V. Silicon PN

typical forward

bias is approx.

0.5~0.8V.

Summary of Contents for GCM-407

Page 1: ......

Page 2: ...Restraints 9 3 Electrical Specifications 10 IX Measurement Operating Instructions 13 1 AC Current Measurement 13 2 AC voltage Measurement 15 3 DC voltage Measurement 17 4 Resistance Measurement 18 5 Continuity Test 19 6 Diode Measurement 21 7 Capacitance Measurement 22 8 Non contact AC Voltage Sensing NCV 24 9 Power 25 10 Automatic Shutdown Function 25 X Maintenance and Upkeep 25 1 General Mainten...

Page 3: ...rrying case If anything is missing or damaged please contact your GW Instek distributor If the instrument is not used in an appropriate manner the safety protec tions could be impaired The unit can be used for MAINS measurements up to CATII 1000V or CATIII 600V according to IEC 61010 031 III Safety Operation Guidelines Please note the warning signs and notes Warnings indicate a condition or action...

Page 4: ...t use the clamp meter if the test lead insulation is damaged if the case insulation is damaged if the LCD is not functioning or if the clamp meter is not functioning properly 2 Do not use the clamp meter if the rear cover or battery cover is not in place Failure to do so may cause electric shock 3 Keep fingers behind the finger guard Do not touch any bare wires conductors unused input terminals or...

Page 5: ...ator from touching dangerous areas 3 Trigger Press the trigger to open the clamp head When the trigger is released the clamp head closes 4 Function dial Selects the measurement function or range 5 Function keys HOLD MAX MIN REL 6 LCD display area Displays the measured data and the function icons 7 Input Terminals Input terminals for measure ments other than AC current measurement VI LCD Display Se...

Page 6: ...Pressing the REL key enters the relative measurement mode In the relative measure ment mode the main display will show the measured value minus the reference value The reference value is obtained from the current measurement when the REL key is pressed This function is only applicable for AC voltage AC current resistance and capacitance measure ment Press the REL key again to exit the relative mea...

Page 7: ...tery 2 Environment Constraints Working environment Indoor Altitude 2000m Safety codes IEC61010 1 IEC61010 2 032 CAT II 1000V CAT III 600V Pollution grade 2 Operating humidity and temperature 0ºC 30ºC not greater than 80 RH 30ºC 40ºC not greater than 75 RH 40ºC 50ºC not greater than 45 RH Storage humidity and temperature 20ºC 60ºC not greater than 80 RH 3 Electrical Specifications Accuracy of readi...

Page 8: ...100 Voltage Input impedance 10MΩ Frequency response 40 400Hz 3 DC Voltage Input impedance 10MΩ 4 Resistance Ω 5 Continuity Test GCM 407 User Manual GCM 407 User Manual Open circuit voltage is approx 3 3V measurable PN forward bias 3V Silicon PN typical forward bias is approx 0 5 0 8V 11 12 ...

Page 9: ...nt conductor should be measured at a time Measuring two or more current conductors may result in erroneous measurement readings 2 Read the AC value directly from the display Note Be sure the conductor to be measured is clamped at the center of the clamp head if not an additional reading error of 1 0 may result GCM 407 User Manual GCM 407 User Manual 3 13 14 The true RMS AC current meaurement accur...

Page 10: ...fter all measurement operations are completed disconnect the test leads from the EUT When the measured voltage is greater than the safety voltage of 30VAC the LCD will display a high voltage warning prompt When voltages greater than the AC 750V range are input the meter warning prompt will flash and the meter will automatically buzz intermit tently 4 GCM 407 User Manual GCM 407 User Manual 15 16 T...

Page 11: ...ng prompt will flash and the meter will automatically buzz intermittently 4 Resistance Measurement See Figure 6 1 Insert the red test lead into the Ω input jack and the black test lead into the COM jack 2 Rotate the function dial to the Ω measurement mode Press the SELECT key to select resistance measurement Ω and connect the test leads in parallel to the resistance to be measured 3 Directly read ...

Page 12: ...rcuit Before measuring in circuit resistors turn off the power from the circuit and discharge any capacitors for best measurement results 5 Continuity Test see Figure 7 1 Insert the red test lead into the Ω input jack and the black test lead in the COM input jack 2 Rotate the function selection switch to the measurement mode Press the SELECT key to select continuity measurement Connect the test le...

Page 13: ...citors should be discharged to ensure measurement accuracy The open circuit test voltage for the diode measurement is approximately 3 5V Do not input voltages higher than 30VDC or 30VAC or personal injury may result After completing all measurement operations disconnect the test leads from the measured circuit 7 Capacitance Measurement See Figure 9 1 Insert the red test lead into the input jack an...

Page 14: ...ages to prevent damage to the meter or to prevent personal injury After completing measurement operations disconnect the test leads from the EUT 9 10 23 24 GCM 407 User Manual GCM 407 User Manual 8 Non contact AC Voltage Sensing NCV See Figure 10 In order to sense whether there is AC voltage or an electromagnetic field present place the front end of the clamp meter near the conductor to be tested ...

Page 15: ...on dial is not turned or a key is not pressed on the clamp within a 15 minute window the display will turn off and the clamp will enter a low power state To wake the meter up press any key Press the SELECT key to turn on the unit with the automatic shutdown disabled X Maintenance and Upkeep See Figure 11 Warning To prevent electric shock keep the protective caps on the test leads when not in use 1...

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