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Related Manuals for Extech Instruments MG325
Summary of Contents for Extech Instruments MG325
- Page 1 USER MANUAL Insulation Tester + DMM Model MG325...
- Page 2 6.4 DC VOLTAGE MEASUREMENTS 6.5 AC VOLTAGE MEASUREMENTS 6.6 RESISTANCE MEASUREMENTS 6.7 CONTINUITY MEASUREMENTS 6.8 CAPACITANCE MEASUREMENTS 6.9 INSULATION RESISTANCE MEASUREMENTS 6.9.1 Disable Lock Mode for Insulation and Continuity Tests 6.9.2 Insulation Resistance Test Timer 6.9.3 Dielectric Absorption Ratio [DAR] Insulation Testing 6.9.4 Polarization Index [PI] Insulation Testing 6.9.5 Comparator Utility 7. DATA RECORDING 15 8. SETUP MODE 15 9. MAINTENANCE 16 9.1 BATTERY INSTALLATION 9.2 REPLACING THE FUSE 10. SPECIFICATIONS 17 MG325-en-GB_v1.1 3/16...
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Page 3: Introduction
1. Introduction Congratulations on your purchase of the MG325 True RMS Insulation Resistance CAT IV 600V DMM. The MG325 features a rugged design for heavy duty use. The MG325 measures Insulation Resistance, AC/DC Voltage, Frequency, Leakage Current, Low Resistance, Continuity, and Capacitance. -
Page 4: Safety Instructions
NEVER operate the meter unless the battery/fuse cover is in place and fastened securely. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. MG325-en-GB_v1.1 3/16... -
Page 5: Safety Standards
4. Continuity (+) positive input jack 5. Continuity (-) COM input jack 6. Insulation, Voltage, Capacitance, Resistance (-) input jack 7. Insulation, Voltage, Capacitance, Resistance (+) input jack 8. Test Voltage alert LED indicator Note: Tilt stand and battery compartment on back MG325-en-GB_v1.1 3/16... -
Page 6: Control Buttons
11. PI/DAR test time area 12. Bargraph measurement representation 13. Comparator area: Test [PASS, FAIL], units [K, M], and reference value. 14. Over-range alert symbol 15. Save/Recall readings memory (01-99); Data Hold [H] icon is also shown in this area MG325-en-GB_v1.1 3/16... -
Page 7: Display Backlight
Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed) the displayed reading. Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will audibly beep just prior to shutting off. MG325-en-GB_v1.1 3/16... -
Page 8: Ac Voltage Measurements
Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed) the displayed reading. Press to store the reading Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will audibly beep just prior to shutting off. MG325-en-GB_v1.1 3/16... -
Page 9: Resistance Measurements
Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed) the displayed reading. Press to store the reading Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will audibly beep just prior to shutting off. MG325-en-GB_v1.1 3/16... -
Page 10: Continuity Measurements
10. Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed) the displayed reading. Press to store the reading Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will audibly beep just prior to shutting off. MG325-en-GB_v1.1 3/16... -
Page 11: Capacitance Measurements
6. Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed) the displayed reading. 7. Press to store the reading Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will audibly beep just prior to shutting off. MG325-en-GB_v1.1 3/16... -
Page 12: Insulation Resistance Measurements
Note: Do not turn the function switch to another test position during a test. Please wait until a test is completed and test leads are removed from the device under test before moving the function switch. MG325-en-GB_v1.1 3/16... -
Page 13: Disable Lock Mode For Insulation And Continuity Tests
Please read and understand the sections on Insulation Resistance testing and Safety before continuing. The MG325 can run an Insulation test for an indefinite period by pressing the TEST button to start/stop tests (Timer function OFF) or it can be programmed to run a test for a specific period of time, 1~10 minutes (Timer function ON). -
Page 14: Polarization Index [Pi] Insulation Testing
FAIL is displayed. 10. The Insulation Resistance comparator preset options are: 500k, 1M, 2M, 5M, 10M, 20M, 50M, 100M, 200m, and 500MΩ. 11. The Continuity comparator preset options are: 1, 2, 5, 10, and 20Ω. MG325-en-GB_v1.1 3/16... -
Page 15: Data Recording
7. Data Recording The MG325 can store, recall, and clear up to 99 readings (01-99). Press the button to save a displayed reading. The displayed counter increments to the next available memory location. To recall a reading, press the button (RECALL will be displayed). Use the arrow buttons to scroll the stored readings. -
Page 16: Maintenance
4. Always use a fuse of the proper size and value (500mA/600V fast blow). 5. Replace and secure the rear battery cover. WARNING: To avoid electric shock, do not operate meter until the fuse cover is in place and fastened securely. MG325-en-GB_v1.1 3/16... -
Page 17: Specifications
250V DC and AC rms input limit Insulation Resistance Test Voltage Outputs Test Short-circuit Output Voltage Test Steps (50~120%) Load Overload current current 50V (0%~+20%) (25~60V) 50kΩ 250VAC/DC ≤2mA 100V (0%~+20%) (50~120V) 100kΩ 250VAC/DC ≤2mA 250V (0%~+20%) (125~300V) 250kΩ 250VAC/DC ≤2mA MG325-en-GB_v1.1 3/16... -
Page 18: General Specifications
This instrument is designed in strict compliance with safety standard IEC61010, overvoltage standard (CAT IV 600V) and pollution degree II. Copyright © 2016 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form www.extech.com MG325-en-GB_v1.1 3/16...
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