Description
The megger insulation resistance tester performs tests on voltages of 500V, 1000V and 2500V, and supports resistance measurement range up to 20.0 GΩ, an ideal tool for electric maintenance, testing and inspection. It can be used to measure the insulation resistance of electrical equipment and household appliances like transformers, electric motors, cables, switches, etc.
Specification
| Model | ATO-IRT-UT502A | ||
| Insulation Resistance (Ω) | Test voltage/accuracy | 500V/1000V/2500V | 0% ~ 10% |
| Measurement range/accuracy | 500V | 0.00 MΩ ~ 99.9 MΩ | ±(3%+5) |
| 100 MΩ ~ 5.0 GΩ | ±(5%+5) | ||
| 1000V | 0.00 MΩ ~ 99.9 MΩ | ±(3%+5) | |
| 100 MΩ ~ 5.0 GΩ | ±(5%+5) | ||
| 2500V | 0.00 MΩ ~ 99.9 MΩ | ±(3%+5) | |
| 100 MΩ ~ 9.9 GΩ | ±(5%+5) | ||
| 10.0 GΩ ~ 20.0 GΩ | ±(10%+5) | ||
| Load current | 500V (R=500kΩ) 1mA | 0% ~ 10% | |
| 1000V (R=1MΩ) 1mA | 0% ~ 10% | ||
| 2500V (R=1MΩ) 1mA | 0% ~ 10% | ||
| Short-circuit current | <2mA | ||
| Low Resistance (Ω) | Range/accuracy | 0.01 Ω ~ 200 Ω (about 5.0V/>200mA) | ±(2%+3) |
| AC Voltage (V) | Test range/accuracy | 30V ~ 600V (50Hz/60Hz) | ±(2%+3) |
| Features | Display | 1999 count | |
| DAR (60s/15s and 60s/30s) | Yes | ||
| PI | Yes | ||
| Auto ranging | Yes | ||
| Low battery indication | Yes | ||
| LCD backlight | Yes | ||
| Light alarm | Yes | ||
| Buzzer alarm | Yes | ||
| High voltage indication | Yes | ||
| Over load indication | Yes | ||
| Auto discharge | Yes | ||
| Test voltage secondary display | Yes | ||
| 10 MΩ internal resistance test | Yes | ||
| General | Power supply | 1.5V battery (LR6) x 6 | |
| Display size | 70.6mm x 34mm | ||
| Working condition | 0℃ ~ 35℃, ≤75%RH | ||
| Altitude | ≤2000m | ||
| Storage condition | -20℃ ~ 60℃, ≤80%RH | ||
| Product weight | 500g | ||
| Product size | 150mm x 100mm x 71mm | ||
| Standard accessories * | Batteries, test leads, alligator clips, gallus |
Note: * Batteries are Not Included for air shippment.
Insulation Resistance Test Wiring Diagram
Tips: What is insulation resistance?
Insulation resistance is the DC resistance of the insulation under the specified conditions, that is, the DC voltage is applied to the dielectric, after a certain period of polarization, the resistance corresponding to the leakage current flowing through the dielectric is called insulation resistance. It is the most basic insulation index of electrical equipment and electrical circuit.
Measurement of insulation resistance
The insulation resistance tester, also called Megohmeter or Megger, is used to measure the insulation resistance of electrical equipment and electrical circuit.
- Connect the lines according to the Megohmmeter test method. The connection of the measuring wires to the device is more suitable for magnetic connector or clamp, and the connection point must be free of rust.
- It is appropriate to use the measuring instrument for 500V / 500 MΩ Megger (where the error is not greater than 10%). Turn the handle of the insulation tester to reach the specified speed for 10 seconds. The stable indicated resistance value of the megohmmeter is the insulation resistance value of the insulation joint (flange), which is required to be greater than 10 megohm.
Factors affecting insulation resistance
- Ambient temperature and humidity, the insulation resistance value of general materials decreases with the increase of ambient temperature and humidity.
- Test time
- Cable itself. When the cable is heated and damp, insulation material will be aging. The insulation resistance is reduced.
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