4 Transmitter
17
4.4.
Maintenance and cleaning
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4.4.1.
Cleaning housing
• Only clean the housing carefully with a moist cloth.
• Do not use aggressive cleaning agents.
• Do not use any solvents.
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4.4.2.
Namur fault conditions
If the faults named in the following table occur, the analog outputs
output special values that enable a general fault warning in the
higher-level control system. The values correspond to the "Namur"
industry standard.
Status
message in
the display
Class
Display
value in the
display
Analog output
4 to 20 mA 1 V
5 V
10 V
Watchdog
error
Error
Previous
value stops
3.8 mA
1.1 V
5.5 V
11 V
Value below
min. scale
Underrange Reading
3.8 mA
0 V
0 V
0 V
Value above
max. scale
Overrange Reading
20.5 mA
1.1 V
5.5 V
11 V
Pressure too
high
Overrange ooooo ·
20.5 mA
1.1 V
5.5 V
11 V
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