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The Insulation Resistance Tester, also known as a Megohmmeter or High Voltage Megohmmeter, is specifically designed for insulation testing in laboratories or on-site. This meter features an LCD large screen with grey-scale backlight display, data storage, and data review functions. It also automatically calculates the absorption ratio and polarization index, and automatically stores data at 15 seconds, 30 seconds, 1 minute, and 10 minutes intervals. With high resolution, easy operation, portability, accuracy, reliability, stable performance, and strong anti-interference capability, it has a structure that is shockproof, dustproof, and moisture-proof. It is commonly used and essential in telecommunications, power, meteorology, server rooms, oil fields, mechanical and electrical installation and maintenance, and industrial enterprises that utilize electricity as industrial power or energy. It is suitable for measuring the resistance values of various insulating materials as well as the insulation resistance of transformers, motors, cables, and other electrical equipment.
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The Insulation Resistance Tester, also known as a Megohmmeter or High Voltage Megohmmeter, is specifically designed for insulation testing in laboratories or on-site. This meter features an LCD large screen with grey-scale backlight display, data storage, and data review functions. It also automatically calculates the absorption ratio and polarization index, and automatically stores data at 15 seconds, 30 seconds, 1 minute, and 10 minutes intervals. With high resolution, easy operation, portability, accuracy, reliability, stable performance, and strong anti-interference capability, it has a structure that is shockproof, dustproof, and moisture-proof. It is commonly used and essential in telecommunications, power, meteorology, server rooms, oil fields, mechanical and electrical installation and maintenance, and industrial enterprises that utilize electricity as industrial power or energy. It is suitable for measuring the resistance values of various insulating materials as well as the insulation resistance of transformers, motors, cables, and other electrical equipment.
The Digital Insulation Resistance Meter consists of medium to large-scale integrated circuits, including a high-precision micro-current measurement system, a digital voltage boosting system, and an automatic discharge circuit.
Measurements can be taken by simply connecting one high-voltage wire and one signal wire to the object under test.
The measurement process is automated, with results displayed on a large screen and stored for later review.
The rated output test voltage range is 250V to 5000V, and the insulation resistance measurement range is 0.01MΩ to 5.00TΩ.
The DC voltage measurement range is 0V to 1000V DC, and the AC voltage measurement range is 0V to 750V AC.
Insulation Resistance Measurement Range and Accuracy
| Output Voltage | Measurement Range | Accuracy |
|---|---|---|
| 250V (15% DC) | 0.01MΩ~2.50GΩ | ±3%rdg±5dgt |
| 2.50GΩ~250 GΩ | ±15%rdg±5dgt | |
| 500V (10% DC) | 0.01MΩ~5.00GΩ | ±3%rdg±5dgt |
| 5.00GΩ~500 GΩ | ±15%rdg±5dgt | |
| 1000V (10% DC) | 0.01MΩ~10.00GΩ | ±3%rdg±5dgt |
| 10.00GΩ~1.00 TΩ | ±15%rdg±5dgt | |
| 2500V (10% DC) | 0.01MΩ~25.0GΩ | ±3%rdg±5dgt |
| 25.0GΩ~2.50 TΩ | ±15%rdg±5dgt | |
| 5000V (10% DC) | 0.01MΩ~50.0GΩ | ±3%rdg±5dgt |
| 50.0GΩ~5.00 TΩ | ±15%rdg±5dgt |
AC/DC Voltage Measurement Range and Accuracy
| Measurement Voltage | Measurement Range | Accuracy |
|---|---|---|
| AC Voltage | 0.01V~750V | ±2%rdg±3dgt |
| DC Voltage | 0.01V~1000V | ±2%rdg±3dgt |
General Specifications
| Function | Insulation resistance, polarization index, absorption ratio, AC/DC voltage testing; automatic discharge function; ambient temperature testing; clock function |
| Power Supply | DC 14.8V 2200mAh rechargeable lithium battery, fully charged to approximately 16.8V |
| Test Voltage | Setting range: 250V, 500V, 1000V, 2500V, 5000V |
| Short Circuit Current | 5mA (≥10mA, ≥3.5mA, ≥1.5mA selectable) |
| Wiring Method | L Terminal: "L" is the high-voltage output terminal, connected to one end of the object under test |
| G Terminal: "G" is the shield terminal, used for measuring insulation materials or cables with the three-electrode method, connected to the electrode protection ring |
|
| E Terminal: "E" is the ground terminal, connected to the ground or zero point of the object under test, such as motor housing metal, transformer core, cable shielding layer |
|
| V Terminal: AC/DC voltage measurement terminal (automatic recognition) | |
| Resolution | Insulation Resistance: 0.01MΩ |
| AC Voltage: 0.01V | |
| DC Voltage: 0.01V | |
| Measurement Time | 1 minute to 30 minutes (depends on measurement mode, can be set) |
| Backlight | Controllable white backlight, suitable for dim environments |
| Automatic Range Selection | Fully automatic |
| LCD | 4-digit LCD display with white backlight |
| LCD Size | 128mm×75mm |
| LCD Display Area | 124mm×67mm |
| Measurement Indication | LED flashing during measurement, progress bar indication |
| Charging Indicator | Red light when charging, green light when fully charged |
| Dimensions | Meter size: length 258mm × width 215mm × height 83mm |
| Standard Test Leads | 1 red high-voltage test probe, 1 green and 1 black test lead each |
| Battery Voltage | Real-time display of remaining battery power, please charge in time when low |
| Communication Interface | USB interface, stored data can be uploaded to a computer for saving and printing |
| Communication Cable | 1 USB communication cable, 1.5m long |
| Operating Current | Standby: Max 25mA (backlight off); Backlight: Max 25mA (backlight only); Measuring: Max 450mA (backlight off) |
| Weight | Meter: 2.19kg (including battery) |
| Total Weight: 3.50kg (including packaging) | |
| Tool Bag | Yellow-black dual-color tool bag, convenient for carrying, good visual effect |
| Operating Temperature and Humidity | -10℃～40℃; below 80% RH |
| Storage Temperature and Humidity | -20℃～60℃; below 70% RH |
| Withstand Voltage | AC 3700V/rms (between front and rear ends of the casing) |
| Insulation Resistance | Above 20MΩ (between screws on bottom cover and top cover at 500V) |
| Electromagnetic Characteristics | IEC61326 (EMC) |
