Operating hours counter for sensor measuring temperature
• Monitors the sequence of the sensor connected to the transmitter in various process areas.
• The operating hours sequence of the process variable is recorded in 9 ranges. It is subdivided
according to the connected sensor and its sensor limits. The user cannot set the ranges.
• The operating hours counter is automatically reset when you change one of the following
parameters in the device:
– Input type
– Wiring configuration
– RTD factor
Procedure
1. Using remote operation (for example SIMATIC PDM), select the menu command "Diagnostics
> Operating time".
2. Select "Input 1", "Input 2" or "Electronics temperature" in the submenu.
9.4.9
Current output
9.4.9.1
Fault current
Introduction
Fault current of the transmitter
The fault current is set to ≤ 3.6 mA at the factory.
You set the fault current of the internal transmitter from ≤ 3.6 mA to ≥ 21 mA with the switch
on the display.
Setting the fault current of the internal transmitter with switch to ≥ 21 mA (Page 175)
A fault current ≥ 21 mA is not permissible for operation of the device with functional safety.
Functional safety cannot be activated with a fault current ≥ 21 mA.
Fault current of the sensor
Your device is delivered with the following Factory settings (Page 214).
You use parameter assignment software to change the parameters for the fault current.
Lower fault current parameter
Adjusts the magnitude of the lower fault current
②
.
Setting range:
Between 3.55 mA and lower saturation limit
③
Factory setting:
3.55 mA, or as specified in order
Parameter assignment
9.4 Assigning parameters using remote operation
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB
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