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The digital insulation resistance tester, also known as a megohmmeter or high-voltage insulation resistance tester, is used for insulation resistance measurement. This instrument features a large LCD screen with gray-white backlight display, data storage, data review, alarm, and auto power-off functions. It also measures DC voltage, AC voltage, absorption ratio, and polarization index.

| Function | Insulation resistance test, voltage test |
| Reference Condition | 23℃±5℃, below 75% rh |
| Rated Voltage (V) | 250; 500; 1000; 2500; 5000V; 10KV |
| Test Voltage (V) | Rated voltage × (1±10%) |
| Insulation Resistance Range (GΩ) | 0.01MΩ~2000GΩ Resolution: 0.01MΩ |
| DC Voltage Range | 0~1000V Resolution: 0.1V |
| AC Voltage Range | 0~750V Resolution: 0.1V |
| Output Short-Circuit Current | ≥5mA (10KV) |
| Absorption Ratio & Polarization Index Measurement | Available |
| Power Supply | 12.6V rechargeable lithium battery |
| Backlight | Controllable gray-white screen backlight, suitable for dim environments |
| Display Mode | 4-digit extra-large LCD display, gray-white screen backlight |
| LCD Display Size | 108mm × 65mm |
| Instrument Dimensions | L×W×H: 277.2mm × 227.5mm × 153mm |
| USB Interface | Has USB interface for software monitoring, data upload to PC, save and print |
| Communication Cable | 1 USB communication cable |
| Test Leads | High-voltage rod red 3m, high-voltage test lead black 1.5m, green 1.5m |
| Data Storage | 500 data sets, "FULL" symbol indicates storage is full |
| Data Review | Data review function: "MR" symbol display |
| Overflow Display | Over-range overflow function: "OL" symbol display |
| Alarm Function | Alarm prompt when measured value exceeds alarm threshold |
| Power Consumption | Standby: 30mA Max (backlight off), Power on with backlight: 42mA Max, Measurement: 300mA Max (backlight off) |
| Instrument Weight | 2750g (including battery) |
| Auto Power Off | Automatically powers off after 15 minutes of inactivity |
| Insulation Resistance | ≥50MΩ (between measurement circuit and housing) |
| Withstand Voltage | AC 3kV/50Hz 1min |
| Operating Temperature & Humidity | -10℃~+50℃, below 85% RH |
| Storage Temperature & Humidity | -15℃~+55℃, below 90% RH |
| Applicable Safety Standards | IEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529 (IP54), Pollution Degree 2, CAT Ⅲ 300V |
| Instrument | 1 unit |
| High-Voltage Rod | 1 pc (red) |
| High-Voltage Test Leads | 2 pcs (black, green × 1 each) |
| Monitoring Software CD | 1 pc |
| USB Communication Cable | 1 pc |
| Charger | 1 pc |
| User Manual / Warranty Card | 1 set |
| Instrument Case | 1 pc |