Namur Fault Conditions - TESTO 6681 Instruction Manual

1.5.5 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.
Display message
No probe signal
Wrong probe
Watchdog error
Values < 0 % RH
Condensation
%RH short-circuit
%RH sensor broken
T short-circuit
T sensor broken
Probe disconnected
testo 6681
- 1.5 Status, warning and error messages 65
Class 0-20mA 4-20mA
Error 21mA
Error 21mA
Error 21mA
Underrange 0mA
Overrange 20.5mA 20.5mA
Error 21mA
Error 21mA
Error 21mA
Error 21mA
Error 21mA
Analog output
1V
21mA 1.2V
21mA 1.2V
21mA 1.2V
3.8mA 0V
1.2V
21mA 1.2V
21mA 1.2V
21mA 1.2V
21mA 1.2V
21mA 1.2V
5V 10V
5.5V 11V
5.5V 11V
5.5V 11V
0V 0V
5.5V 11V
5.5V 11V
5.5V 11V
5.5V 11V
5.5V 11V
5.5V 11V