The Temperature Laboratory realises the International Temperature Scale of 1990 (ITS-90) through a set of fixed point cells (TPW, Hg, Ga, In, Sn, Zn, Al, Ag and Cu) and a set of standard platinum resistance thermometers (SPRTs).
Calibration services provided are:
Standard Platinum Resistance Thermometers
Calibration of Standard Platinum Resistance Thermometers directly at the fixed points of TPW, Hg, Ga, In, Sn, Zn and Al, covering the temperature range from -38.8344 °C to 660.323 °C.
|
Calibration Service |
Range |
Calibration and Measurement Capability (CMC) |
|
SPRT Calibration at Fixed Points |
-38.8344 °C |
0.6 mK |
|
0.01 °C |
0.3 mK |
|
|
29.7646 °C |
0.6 mK |
|
|
156.5985 °C |
1.7 mK |
|
|
231.928 °C |
1.6 mK |
|
|
419.527 °C |
1.9 mK |
|
|
660.323 °C |
16 mK |
|
|
SPRT Calibration at Fixed Points Sub Range |
-38.8344 °C to 0.01 °C |
0.7mK |
|
0.01 °C to 29.7646 °C |
0.7 mK |
|
|
29.7646 °C to 156.5985 °C |
1.8 mK |
|
|
156.5985 °C to 231.928 °C |
2 mK |
|
|
231.928 °C to 419.527 °C |
3 mK |
|
|
419.527 °C to 660.323 °C |
3mK to 16 mK |
Platinum Resistance Thermometers
Calibration of Platinum Resistance Thermometers in comparison with SPRTs, using liquid baths to create uniform and stable temperature conditions, covering the range from -80 °C to 250 °C.
|
Calibration Service |
Range |
CMC |
|
Platinum Resistance Thermometers |
-80 °C to 80 °C |
0.01 |
|
> 80 °C to 150 °C |
0.015 |
|
|
> 150 °C to 250 °C |
0.02 |
|
|
419.527 °C |
0.005 |
Temperature Sensors with Display Unit/
Temperature sensors with display units are calibrated in liquid baths and in block calibrators in comparison with reference thermometers.
|
Calibration Service |
Range |
CMC |
|
Resistance Thermometers With Display Unit |
-80 °C to 80 °C |
0.015 °C |
|
> 80 °C to 150 °C |
0.020 °C |
|
|
> 150 °C to 250 °C |
0.025 °C |
|
|
> 250 °C to 400 °C |
0.6 °C to 0.8 °C |
|
|
Thermocouples With Display Unit |
-80 °C to 150 °C |
0.2 °C |
|
> 150 °C to 250 °C |
0.4 °C |
|
|
> 250 °C to 400 °C |
0.6 °C to 0.8 °C |
Liquid In Glass Thermometers
Liquid in glass thermometers are calibrated in liquid baths from -60 °C to 250 °C by comparison with reference thermometers.
|
Calibration Service |
Range |
CMC |
|
Liquid In Glass Thermometers |
-60 °C to 250 °C |
0.02 °C to 0.05 °C |
Air Temperature Sensors
Calibration of air temperature sensors and data loggers in the range of 10°C to 70°C, in an air chamber.
|
Calibration Service |
Range |
CMC |
|
Air Temperature Sensors |
10 °C to 70 °C |
0.10 °C to 0.30 °C |
Infrared thermometers
IR Thermometers are calibrated by comparison using black body sources in the range from -150 °C to 500 °C.
|
Calibration Service |
Range |
CMC |
|
Infrared thermometers |
-15 °C to 500 °C |
0.6 °C to 2.6 °C |
Temperature Block Calibrators
Temperature block calibrators are calibrated using platinum resistance thermometers in the range from -30 °C to 400 °C.
|
Calibration Service |
Range |
CMC |
|
Temperature Block Calibrators |
-30 °C to 400 °C |
0.2 °C |
Liquid Baths
Calibration of liquid baths is carried out from -80 °C and 250 °C. The temperature profile of the bath can also be measured.
|
Calibration Service |
Range |
CMC |
|
Liquid Baths |
-80 °C to 250 °C |
0.02 °C to 0.03 °C |
Climatic Chambers
Climatic chambers are calibrated in the range from -40 °C to 140 °C. The temperature profile of the chamber can also be measured using 9 PRT sensors distributed in the working volume of the chamber. If the chamber has the capability to create relative humidity conditions, an additional reference hygrometer is used to measure these conditions.
|
Calibration Service |
Range |
CMC |
|
ClimaticChambers - Temperature Measurements |
-40 °C to 140 °C |
0.2 °C |
|
ClimaticChambers - Humidity Measurements |
10 %rh to 90 %rh At 10 °C to 50 °C |
0.6 %rh to 1.5 %rh |
Humidity
Relative Humidity
The Humidity Laboratory uses a two-pressure generator to create reference relative humidity and air temperature conditions.
Calibration Services provided are:
Relative Humidity Sensors
Calibration of relative humidity sensors and data loggers in the range of 10 %rh to 95 % rh and air temperature between 10 °C and 70 °C.
|
Calibration Service |
Range |
CMC |
|
Relative Humidity Sensors |
10 %rh to 95 %rh At 10 °C to 45 °C |
0.4 %rh to 1.1 %rh |
|
10 %rh to 95 %rh At 45 °C to 70 °C |
0.5 %rh to 1.7 %rh |
Dew Point Meters
Calibration of dew point meters in the range of 10 %rh to 95 % rh and air temperature between 10 °C and 70 °C.
|
Calibration Service |
Range |
CMC |
|
Dew Point Meters |
10 %rh to 95 %rh At 10 °C to 45 °C |
0.3 %rh to 1.0 %rh |
|
10 %rh to 95 %rh At 45 °C to 70 °C |
0.4 %rh to 1.6 %rh |
Air Temperature Sensors
Calibration of air temperature sensors and data loggers in the range of 10°C to 70°C, in an air chamber.
|
Calibration Service |
Range |
CMC |
|
Air Temperature Sensors |
10 °C to 70 °C |
0.10 °C to 0.30 °C |