The MR300C-A micro-ohmmeter enables you to perform highly accurate resistance measurements at objects with an extremely low resistance such as cables, contacts, fuses, power connections, graphite, carbon and metal samples. In the lowest measuring range of 100 µΩ the resolution is 10 nΩ!
mr300c-a微欧姆计能实现高精度电阻测量在一个极低的电阻如电缆、物体接触，保险丝，电源连接、石墨、碳和金属样品。在最低量程的百µΩ分辨率是10 NΩ！
| Resistance measurement | |
| Range | 100.00 µΩ – 10.000 kΩ, decadic |
| Overrange | 80%, to 17.999 (e.g. 179.99 µΩ) |
| Max. error | ± 0.03% of reading ± 3 digit (100 µΩ – 1 mΩ) |
| Max. error | ± 0.02% of reading ± 2 digit (10 µΩ – 10 kΩ) |
| Measuring method | integrating dual slope quotient |
| Current | 100 μA (10 kΩ) to 10 A (100 µΩ) |
| Range selection | automatically, using keypad, via RS232 |
| Display | LED, 4 ½ digits |
| Current flow time | approx. 600 ms |
| Temperature Compensation | PT100: Copper – Aluminium selectable |
| Error detection prior to EVERY single measurement | |
| Current connection errors | display: ‚CUR‘, RS232: ‚ECUR‘ |
| Sense connection errors | display: ‚SEN‘, RS232: ‚ESEN‘ |
| Overrange >80% | display: ‚OVL‘, RS232: ‚EOVL‘ |
| Start of measurement | using keypad |
| via RS232 or IEEE – 488 | |
| via PLC (potential free contact) | |
| via foot switch (optional) | |
| Ports | RS232C (full device control) |
| printer (parallel, optional) | |
| start contact (potential-free) | |
| IEEE – 488 (optional) | |
| Dimensions | 235 x 135 x 260 mm (WxHxD) |
