Kaye ValProbe RT - Page 114

Chapter 11: Sensor Verification
ValProbe RT User Manual 104
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
0.100°C 0.025°C 0.175°C
Note: Dry Blocks cannot be utilized for Verification to manufacturers specifications (0.1°C) as
they do not have the necessary Uncertainty.
If a user’s verification strategy is to perform 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 may 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 0.040°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 must utilize a liquid bath.
Pressure Sensors
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.