Namur Fault Conditions - TESTO 6681 Instruction Manual

1.5.6 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 Ethernet
Class
Error
Error
Error
Underrange
Overrange
Error
Error
Error
Error
Error
- 1.5 Status, warning and error messages
Analog output
0 - 4 -
20 mA 20 mA
21 mA 21 mA
21 mA 21 mA
21 mA 21 mA
0 mA 3.8 mA
20.5 mA 20.5 mA 1.2 V
21 mA 21 mA
21 mA 21 mA
21 mA 21 mA
21 mA 21 mA
21 mA 21 mA
1 V 5 V
1.2 V 5.5 V
1.2 V 5.5 V
1.2 V 5.5 V
0 V 0 V
5.5 V
1.2 V 5.5 V
1.2 V 5.5 V
1.2 V 5.5 V
1.2 V 5.5 V
1.2 V 5.5 V
93
10 V
11 V
11 V
11 V
0 V
11 V
11 V
11 V
11 V
11 V
11 V