| Model AR910 is an earth resistance tester for testing power distribution lines, in-house wiring system, electrical appliances etc. It also has an earth voltage range for earth voltage measurement.
Features:
- Designed to safety standard IEC61557.
- Dust and drip proof construction in conformity with IEC60529 (IP54). Measurement can be made even under adverse weather conditions.
- Large LCD digital display and backlight.
- Easy to use, convenience and wide appliance.
- High capability/price scale and accuracy.
- Automatically powers off.
Specifications:
1. Measuring Range and Accuracy (at 23±5°C and RH 75% or less):
|
Range |
Measuring Range |
Accuracy |
|
Earth Voltage |
0~40V (50Hz/60Hz) |
±1.0%rdg ±4dgt |
|
Earth Resistance
20Ω
200Ω
2000Ω |
0~19.99Ω
0~199.9Ω
0~199.9Ω |
±2.0%rdg ±0.1Ω(0~19.99Ω)
±2.0%rdg ±3dgt (above 20Ω)
(Auxiliary earth resistance 100Ω ±5%)
(Earth voltage 10V or less) |
2. Electromagnetic compatibility (Radiated RF immunity & IEC61000-4-3):
RF field strength ≤1V/m, total accuracy: Specified accuracy.
RF field strength=3V/m, total accuracy: specified accuracy + 5% of range.
3. Applicable Standards:
IEC 61010-1 Over voltage CAT ¢ó 330V Pollution Degree 2
IEC 61010-2-31
IEC 61557-1,5
IEC 60529 (IP54)
4. Measuring Method:
(1) Earth voltage measurement: Average sensing.
(2) Earth resistance measurement: Constant current inverter. Frequency: Approx 820Hz.
Measuring current: 20¦¸range Approx AC 3mA.
5. Maximum Operating Error:
Operating error (B) is an error obtained within the rated operating conditions, and calculated with the intrinsic error (A), which is an error of the instrument used, and the error (Ei) due to variations. B=±(IAI + 1.15 ).
A: Intrinsic error.
E1: Variation due to changing the position.
E2: Variation due to changing the supply voltage.
E3: Variation due to changing the temperature.
E4: Variation due to series interference voltage.
E5: Variation due to resistance of the probes and auxiliary earth electrode resistance.
E7: Variation due to changing the system frequency.
E8: Variation due to changing the system voltage.
6. Range to keep the maximum operating error:
Measurement range within which the maximum operating Error (±30%) applies.
20Ωrange: 5-19.99Ω, 20Ωrange: 20-19.99Ω, 2000Ωrange: 200-1999Ω.
7. Measuring mode:
Every scale is continuous measurement.
8. Operating Temperature and Humidity:
Temperature: 0~40°C, Relative humidity: ≤85%RH (no condensation).
9. Storage Temperature and Humidity:
Temperature: -20~60°C, Relative humidity: ≤75%RH (no condensation).
10. Power Source:
9V DC: R6P (SUM-3) x 6
11. Overload Protection:
Earth resistance ranges: 280V AC/DC (10 seconds).
Earth voltage range: 300V AC/DC (1 minute).
12. Insulation Resistance:
5MΩ or more at 500V between the electrical circuit and the housing case.
13. Withstand Voltage:
3700V AC for one minute between the electrical circuit and the housing case.
Included Accessories: 
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