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CW-1201 lightning protection equipotential transition resistance tester
CW-1201 lightning protection equipotential transition resistance tester
Product details
Main technical parameters
1Test electricityflow：0.2～1A，(maximum1.2A)Continuously adjustable, with a step value of0.1A；
2Resolution:1mΩ；
3、Measurement accuracy:200mΩ±1% 0.2Ω~ 20Ω±2%
4、Measurement radius:0~15rice；
5、Display mode:240×160Black and white LCD screen；
6、Working power supply:12VDedicated lithium iron phosphate battery power supply;
7Working environment：temperature-10℃～+50℃ humidity≤90%；
8、shapeSize:330mm×280mm×140mm.
Measurement result judgment
1、Rx=Transition resistance (equipotential resistance),Corresponding required numerical value:
1 |
Rx≦30mΩ |
The transition resistance at the joints of metal objects such as elbows, valves, flanges, etc. in the first type of lightning protection buildings should not exceed 30m Ω |
2 |
30mΩ<Rx≦200mΩ |
The indicator for detecting the effective performance of equipotential bonding should have a DC resistance of less than200mΩ |
3 |
200mΩ<Rx≦240mΩ |
The resistance between the exposed conductive parts connected to a 16A rated circuit breaker should be less than 240m Ω |
4 |
240mΩ<Rx≦3.00Ω |
The DC transition resistance between the maximum distance of metal objects such as metal pipes within the measurement range of the instrument connection should be less than or equal to 3 Ω |
5 |
Rx>3.00Ω |
The equipotential connection is invalid and needs to be checked and dealt with |
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