9.5.2.4
Enable the button lock on the display
Procedure
1. Navigate to the parameter view.
Navigating in the views (Page 107)
2. In the parameter view, select the "Button lock" parameter.
3. Press the button.
The "EDIT" symbol flashes.
4. Select ON with the
or button.
5. Use the button to confirm.
Result
• The display automatically returns to the measurement view.
• The display automatically changes between the measured values every 12 seconds.
• The symbol for button lock "LL" and the measured value ID are displayed alternately.
9.6
Setting the fault current of the internal transmitter with switch to
≥ 21 mA
Introduction
You set the fault current of the internal transmitter from ≤ 3.6 mA to ≥ 21 mA with the switch
on the display.
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.
Parameter assignment
9.6 Setting the fault current of the internal transmitter with switch to ≥ 21 mA
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB
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