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USER MANUAL

Insulation DMM

Model MG320

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Summary of Contents for MG320

Page 1: ...USER MANUAL Insulation Tester DMM Model MG320 ...

Page 2: ...ENTS 7 6 5 AC VOLTAGE MEASUREMENTS 8 6 6 LOW RESISTANCE CONTINUITY MEASUREMENTS 9 6 7 INSULATION RESISTANCE MEASUREMENTS 10 6 7 1 Disable Insulation Test Lock Mode 10 6 7 2 Insulation Resistance Test Time Setup 11 6 7 3 Dielectric Absorption Ratio DAR Insulation Testing 11 6 7 4 Polarization Index PI Insulation Testing 11 6 7 5 Comparator Utility 12 7 DATA RECORDING 12 8 MAINTENANCE 13 8 1 BATTERY...

Page 3: ...p to 20G Low Resistance Continuity Measurements to 20k Auto Ranging measurements Polarization Index PI and Dielectric Aborption Ratio DAR tests Five 5 Insulation Resistance test voltages 50 100 250 500 and 1000V Insulation Resistance tests in10 voltage steps from 50 to 120 of range Front panel LED test voltage alert lamp Eight 8 Insulation Resistance measurement ranges automatic ranging Pass Fail ...

Page 4: ...NSTRUCTIONS This meter has been designed for safe use but must be operated with caution The rules listed below must be carefully followed for safe operation 1 NEVER apply voltage to the meter that exceeds the specified maximum Input Protection Limits Function Maximum Input V DC or V AC 600VDC AC rms Resistance Continuity 500mA 600V fuse protected input Insulation Resistance 250VDC AC rms Surge Pro...

Page 5: ...he test leads to avoid electrical shocks when measuring Do not apply signals greater than those specified between any two terminals or any terminal and ground Set the function switch to the correct position before beginning a test Never move the function switch during a test Please stop testing and remove connections to the circuit under test before moving the function switch to a new position Do ...

Page 6: ...own arrow for adjusting test voltage output and scrolling through recalled readings 9 Press to start Insulation or Low Resistance tests Insulation tests output high voltages and measure insulation resistance Low Resistance tests can be made up to 20kΩ 5 Symbols and Annunciators 1 Test Voltage alert 2 Insulation Test Lock icon 3 Audible beeper symbol 4 PI DAR test modes 5 True RMS voltage measureme...

Page 7: ...ee the Maintenance section for details on battery and fuse replacement 6 4 DC VOLTAGE MEASUREMENTS CAUTION When the measured voltage is 42VDC or 600VAC the meter flashes the warning icon on the upper left Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the position 2 Insert the bl...

Page 8: ...sure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the position 2 Insert the black test lead banana plug into the negative COM jack 6 Insert red test lead banana plug into the positive V jack 7 3 Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip to ...

Page 9: ...ED will light 4 Reset the display to zero before testing Short the test probes and note the value Short the test probes again and press and hold ZERO until ZERO is displayed 0 00Ω reading when successful Press and hold ZERO again to exit 5 Before testing it is best to disconnect one side of the part under test so that other circuits do not interfere with the resistance reading 6 Touch the test pro...

Page 10: ...he TEST button 7 Press the TEST button to stop the test 8 At the end of each test the high voltage switches off alert symbol and LED light switch off the measured resistance value is held in the primary display and the meter internally discharges the balance of the test voltage 9 Short press the H Hold button to freeze H icon or unfreeze no H icon the displayed reading 10 Press to store the readin...

Page 11: ...he meter beeps and then beeps again when Time2 is reached at which time the test automatically stops 7 During the test the main display digits show the test elapsed timer the voltage alert flashes on the upper left and the test voltage alert LED will light 8 If the insulation breaks down during the test the meter emits an audible tone and buzzer 9 Press the TEST button to stop the test and activat...

Page 12: ...TEST button to start the test If the measurement is greater than the reference then the test passes and PASS will be displayed if the measured value is lower than the reference then the test fails and NG is displayed 4 The Resistance comparator preset options are 100k 200k 300k 400k 500k 1M 2M 3M 4M 5M 10M 20M 30M 40M and 50M 5 The Continuity comparator preset options are 1 2 5 10 and 20Ω 7 Data R...

Page 13: ...ttery cover 1 Turn power off and disconnect the test leads from the meter 2 Open the rear battery cover by removing three screws using a Phillips screwdriver 3 Insert the six 6 1 5V AA batteries into battery holder observing the correct polarity 4 Put the battery cover back in place Secure with the screws You as the end user are legally bound EU Battery ordinance to return all used batteries dispo...

Page 14: ...00V test voltage 0 01M 19 99M 20 0M 100 0M 1M 0 01G 0 01M 100 0M 3 5 digits 250V test voltage 0 01M 19 99M 20 0M 200 0M 0 01M 0 1M 0 01M 200 0M 1 5 5 digits 500V test voltage 0 01M 19 99M 20 0M 199 9M 200M 500M 0 01M 0 1M 1Mv 0 01M 500M 1 5 5 digits 1000V test voltage 0 01M 19 99M 20 0M 199 9M 200M 2000M 2 0G 20 0G 0 01M 1M 1M 0 1G 0 01M 200 0M 1 5 5 digits 200M 2000M 1 5 5 digits 2 0G 10 0G 10 3 ...

Page 15: ...01 99 Input Impedance 10MΩ AC Response True rms ACV Bandwidth 50Hz to 400Hz Over range indication is displayed Auto Power Off After 3 minutes of inactivity Polarity Automatic no indication for positive Minus sign for negative Measurement Rate 2 times per second nominal Low Battery Indication is displayed if battery drops below operating voltage Battery Six 6 1 5V AA batteries Consumption 500mA at ...

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