Thermocouples
Thermocouples will be calibrated by comparison with Laboratory standards, in constant temperature baths or furnaces. The reference junction will be kept at 0 ¢J. The maximum calibration temperature is 1200 ¢J.
The inhomogeneity of the thermocouple wire will normally be evaluated to assess its effect on the calibration uncertainty.
The thermal emfs of the thermocouple at the measuring temperatures will be determined and fitted to a polynomial. The coefficients of the polynomial will be reported.
For thermocouples bearing serial numbers or markings for identification, certificates of calibration will be issued. Otherwise, calibration reports will be issued instead.
Thermocouples submitted should be no less than 1 m in overall length.
Calibration charges
| Fee in HK$ | |
|---|---|
| Calibration at one temperature. | $2420 |
| Calibration at each additional temperature. | $570 |
| Additional charge, if any of the above temperatures exceed 230 ¢XC. | $980 |
