HZ2375 500A Single Phase Contact Resistance Tester
| Selection | 500A | 10-5000A |
| Measurement range | 100A | Current customized |
| 200A | 1, two-phase | |
| 300A | 2, three-phase | |
| 400A | ||
| 500A | ||
| customized | ||
| Test range | 0~19999mW expandable | |
| Test precision | 0.5%rdg±10dgt | |
| Resolution | 0.01mW | |
| Working power | AC 220V±10% 50Hz±2% | |
| Length(mm) | 450 | |
| Width(mm) | 250 | |
| Height(mm) | 220 | |
| Weight(Kg) | 9.9 | |
Operating Principle
Intelligent Circuit Resistance Tester adopts current and voltage method test principle, also called four-wire test technology, principle shows as below picture 1.
Picture 1, Test Principle
Current source have two-end"I+,I- (called 'I' shape), supply current for being tested resistance Rx, current value can be read by amperemeter I,voltage of Rx"V+,V-" (called 'V' shape) read by voltmeter V. So to calculate resistance value by the measurement of I and V.
Failure Analysis and Trouble Shooting
| Symptom | FA | Trouble shooting | Remark |
| No display after power on | 1Power not connected or open | Check fuse or switch broken | Must use same type fuse, do not other type instead |
| 2) Fuse not fit well or open | Change new fuse or re-insert fuse | ||
| Output current can not reach to rated current | 1) Test path too long caused section area too small | Change big section area cable | |
| No current output | 1) Equipment connection open | Check tester | |
| 2) Test circuit is open | Check test circuit carefully |
Attentions
1.Before power on, please contact current output end and being tested object.
2.Tester should be stored and placed in moisture-proof, dry and clean room.
3.Do not disassemble and revise the tester, or else caused electric shock risk.
4.Do not repair and self-revise, or else it is not the guarantee period.
5.Do read the user manual in details before using.
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