Troubleshooting
Promag 50
84
Hauser
9.5
Response of outputs to errors
!
Note!
The failsafe mode of totalizers, current, pulse and frequency outputs can be customized by means
of various functions in the function matrix. You will find detailed information on these procedures
in the "Description of Device Functions" manual.
You can use positive zero return to set the signals of the current, pulse and status outputs to their
fallback value, for example when measuring has to be interrupted while a pipe is being cleaned. This
function takes priority over all other device functions: simulations, for example, are suppressed.
Failsafe mode of outputs and totalizers
Process/system error is current
Positive zero return is activated
"
Caution!
System or process errors defined as "Notice messages" have no effect whatsoever on the inputs and outputs. See the
information on
Current output
MINIMUM VALUE
0–20 mA
0 mA
4–20 mA
2 mA
4–20 mA HART
2 mA
4–20 mA NAMUR
3.5 mA
4–20 mA HART NAMUR
3.5 mA
4–20 mA US
3.75 mA
4–20 mA HART US
3,75 mA
0–20 mA (25 mA)
0 mA
4–20 mA (25 mA)
2 mA
4–20 mA (25 mA) HART
2 mA
MAXIMUM VALUE
0–20 mA
22 mA
4–20 mA
22 mA
4–20 mA HART
22 mA
4–20 mA NAMUR
22.6 mA
4–20 mA HART NAMUR
22.6 mA
4–20 mA US
22.6 mA
4–20 mA HART US
22.6 mA
0–20 mA (25 mA)
25 mA
4–20 mA (25 mA)
25 mA
4–20 mA (25 mA) HART
25 mA
HOLD VALUE
Last valid value (preceding occurrence of the fault) is output.
ACTUAL VALUE
Measured value display on the basis of the current flow
measurement. The fault is ignored.
Output signal corresponds to
"zero flow"
Pulse output
MIN/MAX VALUE
FALLBACK VALUE
Signal output
no pulses
HOLD VALUE
Last valid value (preceding occurrence of the fault) is output.
ACTUAL VALUE
Fault is ignored, i.e. normal measured-value output on the basis of
ongoing flow measurement.
Output signal corresponds to
"zero flow"
