Chapter 10: Sensor Verification
Kaye ValProbe RT User Manual
90
Table 6: Recommended Temperature Baths
Model
Bath
Uncertainty
IRTD
Uncertainty
Maximum Total
Uncertainty
CTR-25
(-25°C to 140°C) – Liquid
0.020°C
0.025°C
0.045°C
CTR-40
(-40°C to 150°C) – Liquid
0.010°C
0.025°C
0.035°C
CTR-80
(-80°C to 30°C) – Liquid
0.012°C
0.025°C
0.037°C
LTR-150
(-30°C to 150°C) –
Liquid/Dry
0.10°C
0.025°C
0.125°C
Note: Dry Blocks cannot be utilized for Verification to manufacturers specifications (0.1°C) as
they do not have the necessary Uncertainty.
If your verification strategy is to do a periodic pre-Verification and post Verification of the
process qualification, then the Verification criteria is usually < 0.5°C. In this case the above-
mentioned baths or Kaye Dry Blocks can be utilized as they provide adequate uncertainty as
compared to the criteria.
Table 7: Recommended Temperature Dry Blocks
Model
Bath
Uncertainty
IRTD
Uncertainty
Maximum Total
Uncertainty
LTR-150
(-30°C to 150°C) – Dry Block
0.10°C
0.025°C
0.125°C
LTR-40 / 140
(-40°C to 150°C) – Dry
Block
0.10°C
0.025°C
0.125°C
LTR-90
(-90°C to 140°C) – Dry Block
0.15°C
0.025°C
0..175°C
HTR 420
(30°C to 420°C) – Dry Block
0.10
°C
0.025°C
0.125°C
HTR 400
(-25°C to 400°C) – Dry Block
0.10
°C
0.025°C
0.125°C
LTR -25/140
(-25°C to 140°C) – Dry
Block
0.15°C
0.025°C
0.04°C
Note: The sensor tips of bendable or flexible loggers should be fully inserted to the bottom of
the well. Rigid loggers with shorter tips have to utilize a liquid bath.
Pressure Sensors
In order to verify the pressure sensors, meet the calibration accuracy specification, the
pressure calibration equipment must have an accuracy of 0.15% full scale (of 5 bar) or better.
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