StarTalk™ DTM Help for StarPac 3 System
© Flowserve Corporation
Version 1.0.0 – Printed November 1, 2013
StarPac 3 Temperature ADC Factors
If a temperature calibrator is not available, the following table can be used to enter the calibration
ADC factors for the temperature sensing of StarPac. This is one of the advantages of using a K-
type thermocouple and the linearization circuit as we do. You can obtain an acceptable temperature
calibration by simply entering these values into the StarPac 3 calibration factors.
StarPac 3 Temperature ADC Calibration Factors
Ref. Temperature(
°
F)
StarPac 3
-40
2515
0
2745
32
2935
100
3350
200
3980
212
4055
300
4600
400
5210
500
5825
600
6455
700
7090
800
7735
900
8380
1000
9030
1100
9680
Use the EDIT REGISTER (either StarTalk XP software or local user interface) functionality. You must first
calculate the calibration slope for the thermocouple. Use the information from the table above in the equation:
CalSlope = (Tspan (
°F) - Tzero (°F))
(ADC span - ADC zero)
The result from this calculation is entered in register 70487. Next, enter the Minimum ADC value in register
40070 and the corresponding temperature value in register 70687.
The StarPac 3 uses the following equation to calculate the process temperature:
Tprocess(°F) = (ADC read(register 30009) – ADC min(register 40070)) x CalSlope (register 40487) + Tzero (°F)
(register 40687)
NOTE: You must use the F values for these calculations, as those are the native units the StarPac 3 first calculates.
It then converts this calculation to the desired units and outputs the result to register 30403 in user units.