Appendix
Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART
120
Hauser
10.2.3
Output
Expert
È
Output
È
Current output
Parameter name
Description
Output current (054)
Display
Displays the current value of the current.
Alarm behav. P (050)
Selection
Configure the current output for when the sensor limits are undershot or overshot.
Options:
• Warning
The device continues measuring. An error message is displayed.
• Alarm
The output signal assumes a value that can be specified by the "Output fail mode"
function.
• NAMUR
– Lower sensor limit undershot: Current output = 3.6 mA
– Current output assumes value of 21 to 23 mA, depending on the setting of the
"
High alarm curr.
"
(052)
parameter.
Factory setting:
Warning
Alarm cur. switch (165)
Displays the switch status of DIP switch 3 "SW/alarm min."
Display
• AF
The alarm current has the value defined in the
"Output fail mode" (051)
.
• Alarm min.
The alarm current is 3.6 mA regardless of the software setting.
Output fail mode (190)
Selection
Select the output fail mode.
In the event of an alarm, the current assumes the current value specified with this
parameter.
Options:
• Max. (110%): can be set from 21 to 23 mA
Max: can be set from 21 to 23 mA
see also "High alarm curr. (052)"
• Hold: last measured value is held
• Min. (–10%): 3.6 mA
Factory setting:
Max. alarm 110% (22 mA)
High alarm curr. (052)
Entry
Enter the current value for the high alarm current.
See also "Output fail mode".
Input range:
21 to 23 mA
Factory setting:
22 mA
Set min. current (053)
Entry
Enter the lower current limiting value.
Some switching units do not accept current values lower than 4.0 mA.
Options:
• 3.8 mA
• 4.0 mA
Factory setting:
3.8 mA
Lin./SQRT switch (133)
Display
Displays the state of DIP switch 4 "SW/SQRT".
Display
• SW
The output characteristics is defined in the "Linear/Sqroot" (055) parameter
• Square root
The output characteristics follows a square root function, independent of the software
setting.
This characteristics is needed for differential pressure flow measurement.
