HM2571 Digital Earth Resistance Tester
Applications:
The digital grounding resistance tester is a commonly used engineering measurement instrument, widely used in electrical equipment and precise measurement of grounding resistance of power lines in industries such as power, lightning protection, communication, and transportation. It is an indispensable tool for electrical equipment safety inspection and grounding engineering completion acceptance.
-
Strictly FAT Test - Third-party Calibration
-
Response within
24 hours -
Free warranty
12 month -
On-line training
Support
Profile:
The tester abandons the traditional way of making power by artificial, uses advanced large scale integrated circuits,applies DC / AC transformation technology ,makes three side buttons, four-terminal measurement button to combine into a model of the new grounding resistance measuring instrument.
The principle of the tester is to make DC into AC low-frequency constant current by the DC / AC converter inside, through the auxiliary grounding electrode C and E composition of the measured object circuit to generate AC voltage drop measured object, sent by the auxiliary grounding electrode P AC amplifier and then displayed through the detector head into the table. With magnification switch, available in three different capacity limits: 0 ~ 2Ω, 0 ~ 20Ω, 0 ~ 200Ω.
The principle of the tester is to make DC into AC low-frequency constant current by the DC / AC converter inside, through the auxiliary grounding electrode C and E composition of the measured object circuit to generate AC voltage drop measured object, sent by the auxiliary grounding electrode P AC amplifier and then displayed through the detector head into the table. With magnification switch, available in three different capacity limits: 0 ~ 2Ω, 0 ~ 20Ω, 0 ~ 200Ω.
Features:
- The structure of high strength aluminum alloy case, the circuit to prevent the frequency, radio frequency interference detection method using phase-locked loop tracking and accompanied by synchronous switched capacitor filter, the instrument has good anti-jamming capability.
- Use of DC / AC technology will transform the low-frequency constant DC current into AC for the measurement.
- Allow auxiliary grounding resistance in the 0 ~ 2KΩ (RC), 0 ~ 40KΩ (RP) between the change not affect measurement results.
- No manual adjustment of the instrument balance, 3 (1 / 2)-bit LCD display, in addition to resistance measurement, it can also measure low resistance conductor resistance, soil resistivity and the AC ground voltage.
- Should the test loop unreasonable header displays "1" overflow, consistent with conventional measurement practices.
Parameter:
1. Operating Conditions
- Ambient temperature: 0 ℃ ~ +45 ℃
- Relative humidity: ≤ 85% RH
2. Measuring range and the constant value (RMS)
- Relative humidity: ≤ 85% RH
- Resistance: 0 ~ 2Ω (10mA), 2 ~ 20Ω (10mA), 20 ~ 200Ω (1mA)
- Voltage: AC 0 ~ 20V
3. Measurement accuracy and resolution
- Voltage: AC 0 ~ 20V
- Accuracy: 0 ~ 0.2Ω ≤ ± 3% ± 1d
- 0.2Ω ~ 200Ω ≤ ± 1.5% ± 1d
- 1 ~ 20V ≤ ± 3% ± 1d
- Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V
4. Errors caused by auxiliary earth resistance and ground voltage measurement
- 0.2Ω ~ 200Ω ≤ ± 1.5% ± 1d
- 1 ~ 20V ≤ ± 3% ± 1d
- Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V
- Allow auxiliary grounding resistance RC (C1 and C2 between)
0 ~ 2Ω, 2 ~ 20Ω ≤ 1KΩ
20 ~ 200Ω ≤ 2KΩ
RP (P1 and P2 between) <40KΩ error ≤ ± 5%
20 ~ 200Ω ≤ 2KΩ
RP (P1 and P2 between) <40KΩ error ≤ ± 5%
- Allow to voltage (rms frequency) ≤ 5V error ≤ ± 5%
5. Power
- maximum power dissipation≤ 2W
- DC: 8 × 1.5V (AA, R6) Battery
- AC: 220V/50Hz
6. Size and weight
- DC: 8 × 1.5V (AA, R6) Battery
- AC: 220V/50Hz
- Host Size: 220mm * 200mm * 105mm
- Host Weight: ≤ 1.4kg
- Host Weight: ≤ 1.4kg
Pictures:
