Calibration service - temperature

Measured variable temperature (resistance thermometers, thermocouples)

Resistance thermometers and base metal thermocouples are calibrated according to the DKD-R 5-1 and DKD-R 5-3 guidelines.

List of the calibration procedures used with details of the procedures within the scope of the accreditation of flexible scopes:

Calibration guideline	Output status	Description	Standard
DKD-R 5-1	09/2018	Calibration of resistance thermometers	X
DKD-R 5-3	09/2018	Calibration of thermocouples	X

The procedures are specified in accordance with the requirements of EA-2/15:2019 as part of the accreditation of flexible scopes.

Services for resistance thermometers

Calibration at temperature fixed points: Water triple point and gallium melting point*
Comparative calibration in liquid bath as well as in fluidizing solid bath up to 660°C*
Comparative calibration in calibration furnace 660°C

* Calibration in the accredited scope

Services for thermocouples

Batch testing for thermoelectric cables and elements up to 1200°C
Inhomogeneity testing
Comparative calibration in liquid bath as well as in fluidizing solid bath up to 660°C*
Comparative calibration in calibration furnace up to 1200°C

* Calibration in the accredited scope

Calibration item	Calibration range (accredited)	Calibration range (Wks)
Resistance thermometer	Comparative calibration: (-30…550) °C Fixed point calibration: 0,00 °C, 0,01 °C, 29,7646 °C	(-80…660) °C
Thermocouples	(-30…660) °C	(-80…1200) °C

Accredited calibration, smallest possible measurement uncertainties:

Calibration object	Range	Smallest measurable uncertainty
Resistance thermometer	0,00 °C	25 mK
	0,01 °C, 29,7646 °C	5 mK
	(-30…100) °C	50 mK
	(>100…400) °C	80 mK
	(>400…550) °C	0,1 mK
Resistance thermometer with transmitter	(-30…550) °C	U_PRT + 0,1 K
Base metal thermocouples	(-30…100) °C	0,3 K
	(>100…400) °C	0,5 K
	(>400…550) °C (>550…660) °C	0,7 K 1,5 K
Base metal thermocouples with transmitter	(-30…660) °C	U_PRT + 0,5 K

U_PRTis the expanded uncertainty of measurement of the calibration of the resistance thermometer or thermocouple.

The smallest measurement uncertainty that can be specified cannot necessarily be realized on every calibration object and may be less favorable for a particular thermometer.

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