Changing The Callendar-Van Dusen Coefficients; Assignment Of Dynamic Variables; Operating Hours Counter - Siemens SITRANS TH100 Operating Instructions Manual

Parameter assignment
9.4 Assigning parameters using remote operation
9.4.6.2

Changing the Callendar-Van Dusen coefficients

Procedure
1. Select a sensor with Callendar-Van Dusen coefficients for the "Input type" parameter.
2. Change the values for R0, A, B and C, or R0, Alpha, Beta and Delta.
3. Transfer the values to the device.
9.4.7

Assignment of dynamic variables

With the remote operation you can assign any device variable for the dynamic variables PV
selector, SV selector, TV selector and QV selector.
The device variable assigned to the PV selector controls the loop current.
Device variables:
9.4.8

Operating hours counter

Operating hours counter for transmitter electronics
• Monitors the number of operating hours during which the transmitter remained in
continuous operation, depending on the ambient temperature.
• The operating hours history of the transmitter is recorded in 9 ambient temperature ranges.
• Starts with the first commissioning at the factory.
• Operating hours counter and temperature ranges cannot be reset or set by the user.
• The operating hours counter is only updated as long as the device is in measuring mode. The
operating hours counter is not updated in simulation mode.
166
Input 1
Input 2
Input 1 CJC
Input 2 CJC
Average input 1 and input 2
Difference input 1 - input 2
Difference input 2 - input 1
Absolute difference input 1 - input 2
Minimum input 1 or input 2
Maximum input 1 or input 2
Input 1 and input 2 as backup
Input 2 and input 1 as backup
Average input 1 and input 2 with both as backup
Minimum input 1 or input 2 with both as backup
Maximum input 1 or input 2 with both as backup
Electronics temperature
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB