Extech Instruments MG320 User Manual page 2

Table of Contents
1. INTRODUCTION
2. SAFETY
3. METER DESCRIPTION
4. CONTROL BUTTONS
5. SYMBOLS AND ANNUNCIATORS
6. OPERATING INSTRUCTIONS
6.1 Display Backlight
6.2 Data Hold
6.3 Low Battery Indication
6.4 DC VOLTAGE MEASUREMENTS
6.5 AC VOLTAGE MEASUREMENTS
6.6 LOW RESISTANCE / CONTINUITY MEASUREMENTS
6.7 INSULATION RESISTANCE MEASUREMENTS
6.7.1 Disable Insulation Test Lock Mode
6.7.2 Insulation Resistance Test Time Setup
6.7.3 Dielectric Absorption Ratio [DAR] Insulation Testing
6.7.4 Polarization Index [PI] Insulation Testing
6.7.5 Comparator Utility
7. DATA RECORDING
8. MAINTENANCE
8.1 BATTERY INSTALLATION
8.2 REPLACING THE FUSE
9. SPECIFICATIONS
2 MG320-en-GB_v1.1 1/17
3
3
5
6
6
7
7
7
7
7
8
9
10
10
11
11
11
12
12
13
13
13
14