Current-Carrying Resistors (Current Shunts)
Four-terminal current-carrying standard resistors in the range 0.1 mΩ to 1Ω can be calibrated. The maximum test current is 100 A at 0.1 mΩ but becomes smaller at higher resistance values. At 1Ω, it is limited to 1 A.
Resistors suitable for oil immersion will normally be measured in a constant temperature oil bath at 23 ¢J. Air-cooled resistors will be measured in air at an ambient temperature of 23 ¢J.
Resistors are usually measured at 50% of their rated currents. If other current levels are required, customers should specify their particular requirements.
Calibration charges
| Fee in HK$ | |
|---|---|
| Measurement of resistance for a current-carrying resistor at one test current. | $2410 |
| Measurement of resistance for the same current- carrying resistor at each additional test current. | $1000 |
