TB 9-6625-109-40
CALIBRATION PROCESS FOR PRECISION
RTD THERMOMETER, MODEL WSP500
CAUTION
Temperature baths reach high temperatures.
Safety practices
must be observed.
NOTE
Access to Controller Automated Tools from the USATA home
page website will be required to run program. (Controller
Automated Tools Database Maintenance is not required.)
NOTE
In order to generate the a5, b5, a8, and b8 coefficients, the
actual resistance value of the TI at the Triple-Point of Water
(or at ICE point), must be determined and recorded.
NOTE
The actual values at the following temperature settings must
be established and recorded: 30 C, +30 C, +200 C and
+400 C.
NOTE
If the solution used in the temperature bath cannot reach
+400 C, the uniformity and stability of the alternate heat
source must be accounted for.
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers' manuals for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
