JKJZ50 grounding wire group resistance tester

The JKJZ50 grounding wire group DC resistance tester is used to test whether the portable short-circuit grounding wire meets the requirements of the "Technical Standards for Portable Short Circuit Grounding Wires" and the "Preventive Experimental Regulations for Power Safety Tools", in order to avoid unqualified products entering practical applications and causing accidents.
Main functions and features:
1. Adopting a brand new constant current source, suitable for testing various portable short-circuit grounding wires and protective grounding wires.
2. A 65K true color LCD with a 320 × 240 dot matrix, displaying clearly under strong light.
3. The instrument comes with a perpetual calendar and power down storage, which can store test data for easy reference.
4. The protection function is complete and can work continuously until the temperature protection turns off the power.
5. Equipped with RR232 and USB interfaces, it can communicate with computers and store on USB drives.
6. The instrument is equipped with a micro printer that can print test results.
Main technical indicators:
1. Output current: 50A, 40A, 30A
2. Test range: 50A: 100 μ Ω～ 200m Ω
40A：200μΩ～250mΩ
30A：300μΩ～300mΩ
3. Resolution: up to 0.1 μ Ω
4. Test accuracy: 0.5%
5. Dimensions: 355 × 275 × 147 (mm)
6. Working temperature: -20 ℃~40 ℃
7. Working humidity:<80% RH, no condensation
8. Working voltage: AC220V ± 10%
9. Working frequency: 50Hz