Results of Techne Inc Proficiency testing

Techne Inc contracted with the Transcat Primary Temperature calibration laboratory to perform an inter-laboratory proficiency test. The goal was to verify and provide to Techne Inc customers it's level of temperature calibration proficiency. Transcat is an A2LA accredited calibration facility.

Techne Inc performs ITS90 calibrations by comparison method using SPRT's that are calibrated by Fixed point. Using the following test procedure and M&TE Techne Inc calibrated an SPRT and generated ITS90 calibration constants. These constants were entered into Transcat's Primary thermometer and the degrees C data observed was recorded for each of the ITS90 fixed points as shown below. Techne's asset number 1004 162CE SPRT s/n: 4619 was calibrated for this test.

Techne Inc procedure # 30116
Techne Inc Asset # 1020 - BF Goodrich 162CE SPRT s/n: 4550- calibrated on 8/26/05. Due for recalibration on 8/26/07
Techne Inc Asset # 1046 - Instrulab Inc Model 4222C SPRT readout s/n: 16011 - calibrated on 4/11/06. Due for recalibration on 4/11/07
Temperature sources used for the comparison calibration
Techne FB08 Fluidized bath +50 to 700ēC
Techne RCB-80 refrigerated bath -80 to +20ēC
Copper isothermal block in LN2 Dewar -196ēC
Dewar of distilled ice for RO measurement per ASTM E563-02

Email us for details of this profiency test.
 

ITS90 Fixed point Comparison Point actual System Indication System error of Techne Inc calibrated SPRT Transcat Measurement Uncertainty (K=2) Techne Measurement uncertainty for procedure 30116 (K=2)
Ar TP -195.6232 -195.6308 -0.0076 2.6mK 0.013
Hg TP -38.8368 -38.8386 -0.0018 2.3mK 0.021
TPW 0.0100 0.0100 0.0000 1.5mK 0.009
Sn FP 231.9280 231.9278 -0.0002 2.9mK 0.015
Zn FP 419.5270 419.5165 -0.0105 2.4mK 0.015
Al FP 660.3230 660.3098 -0.0132 4.6mK 0.043

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