Extech Instruments MG300 User's Guide Page 1

User's Guide Wireless TRMS Multimeter and Insulation Tester Model MG300

10 MG300-en-US_v2.2 04/15 % 4 – 20mA MEASUREMENTS 1. Set up and connect the meter as described for DC mA measur

11 MG300-en-US_v2.2 04/15 AUTORANGING/MANUAL RANGE SELECTION When the meter is first turned on, it automatically

12 MG300-en-US_v2.2 04/15 DISPLAY BACKLIGHT Press the key to switch the backlight on. The backlight will automa

13 MG300-en-US_v2.2 04/15 PC WIRELESS COMMUNICATION 1. Install and launch the PC software (refer to the HELP ut

14 MG300-en-US_v2.2 04/15 Maintenance WARNING: To avoid electric shock, disconnect the test leads from any sour

15 MG300-en-US_v2.2 04/15 REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from a

16 MG300-en-US_v2.2 04/15 Specifications Function Range Resolution Accuracy DC Voltage 400mV 0.01mV (0.06%

17 MG300-en-US_v2.2 04/15 Function Range Resolution Accuracy Resistance 400 0.01 (0.3% reading + 9 digits)

18 MG300-en-US_v2.2 04/15 Meg OHMS Terminal Voltage Range Resolution Accuracy Test current Short circuit cur

19 MG300-en-US_v2.2 04/15 Enclosure Double molded, waterproof (IP67) Shock (Drop Test) 6.5 feet (2 meters) Dio

2 MG300-en-US_v2.2 04/15 Introduction Congratulations on your purchase of the MG300 True RMS MultiMeter Insulati

20 MG300-en-US_v2.2 04/15 WarrantyFLIRSystems,Inc. warrantsthisExtechInstrumentsbranddevicetobefree

21 MG300-en-US_v2.2 04/15 GarantieFLIRSystems, Inc.garantitquecetappareilExtech Instrumentsestexempt

22 MG300-en-US_v2.2 04/15 GarantíaFLIR Systems, Inc., garantizaestedispositivomarcaExtechInstrumentspa

3 MG300-en-US_v2.2 04/15 SAFETY INSTRUCTIONS This meter has been designed for safe use, but must be operated wit

4 MG300-en-US_v2.2 04/15 Controls and Jacks 1. 40,000 count LCD display 2. MAX/MIN ( - ) button 3. STORE (<

5 MG300-en-US_v2.2 04/15 Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC a

6 MG300-en-US_v2.2 04/15 mV VOLTAGE MEASUREMENTS CAUTION: Do not measure mV voltages if a motor on the circuit

7 MG300-en-US_v2.2 04/15 AC CURRENT (FREQUENCY, DUTY CYCLE) MEASUREMENTS CAUTION: Do not make 20A current measu

8 MG300-en-US_v2.2 04/15 CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits

9 MG300-en-US_v2.2 04/15 TEMPERATURE MEASUREMENTS 1. Set the function switch to the Temp position. 2. Insert t