The AEMC high-current Micro-Ohmmeter Model 6290 is a portable, microprocessor controlled instrument. It has optimized filters and protection for measurements in electrical substation. The 6290 can be used to accurately measure very low contact resistances on high voltage circuit breakers, switches, busbars, etc., with test currents up to 200A. It employs the four-terminal Kelvin method to prevent errors caused by test leads and their contact resistances.
It has internal memory for storing up to 200 readings. The USB interface may be connected to a computer to download the stored values. The high-current generation system is based on modern technology that allows for a significant decrease in both weight, 24.25 lbs and size. The case is made of hard plastic, highly resistant to impact and environmental conditions. Internal, thermal sensors, in all sensitive components, prevent damage to the instrument caused by overheating.
Features
- Accurately measures low contact resistances with the test currents up to 200A
- Measures resistances from 0 to 20mΩ
- Measures resistances from 0 to 20mΩ
- Resolution of 0.1μΩ
- Analog bargraph indicator with backlit digital display
- Stores up to 200 test results
- USB Interface
- Direct printout using DataView software and a PC
- Rugged, lightweight and water-resistant
- Includes 20ft long test cables with C clamps
Specifications
| Test Current Range | 100A, 200A (True DC); Adjustable from 0 to 100% |
| Resistance Range | 0 to 199μΩ (test current: up to 200A)
0 to 19.99mΩ (test current: up to 100A) |
| Accuracy | ±0.5% of Reading ± 2cts |
| Resolution | 0.1 μΩ for R <200μΩ
1 μΩ for R < 2000 μΩ
10μΩ for R < 20mΩ |
| Output Voltage | 3.5VDC @ 200A
4.5VDC @ 100A
5.8VDC (no load) |
| Max. Load Resistance | 10mΩ @ 200A
30mΩ @ 100A |
| Measurement Principal | Four-terminal, Kelvin-type |
Applications
- Test switchgear contact resistance
- Test circuit breaker contact resistance
- Test air frame bonding
- Test air bonding
- Test pipeline bonding