Jk300-44 DC resistance tester

The JK300-44 series DC resistors are mainly used for measuring the DC resistance of distribution transformers, transformers, engines, lines, etc. They are digital products that replace single and double arm bridges.
Main functions and features:
1. AC/DC power supply method, using lithium batteries, small size, light weight, easy to carry.
2. A 65K true color LCD with a 320 × 240 dot matrix, displaying clearly under strong light.
3. The protection function is complete and can protect against the impact of back electromotive force on the instrument, making its performance more reliable.
4. Fast response speed, can directly switch to on load tap changer in measurement state, and the instrument automatically refreshes data.
5. Intelligent power management technology ensures that instruments always operate at power, saving energy.
6. There are multiple current levels and a wide testing range, and the current can be automatically selected according to the load.
7. It has an audible discharge alarm, clear discharge indication, and reduces misoperation.
8. The instrument comes with power down storage, which can store 1000 sets of test data and can be accessed at any time.
Main technical indicators:
1. Output current JK300-44A: 10A, 2A, 1A, 200mA, 40MA,<5mA, automatic
JK300-44B:2A、1A、200mA、40MA、<5mA、 automatic
2. Test range: 10A: 0.5m Ω~200m Ω
2A：2rnΩ～3Ω
1A：5mΩ～6Ω
200mA：100mΩ～40Ω
40mA：500mΩ～200Ω
<5mA：50Ω～20KΩ
3. Resolution: up to 0.1 μ Ω
4. Test accuracy: 0.2%
5. Dimensions: 325 × 240 × 275 (mm)
6. Working temperature: -20 ℃~40 ℃
7. Working humidity:<80% RH, no condensation
8. Working voltage: AC220V ± 10%
9. Working frequency: 50Hz