158 UMG70XV3-4EN 12.01.2009
18 Outputs
18.4 Activation of a Pulse Output
A pulse output is an integrating output which emits a pulse when the volume or the mass
of the medium which has passed the measuring point reaches a given value (PULSE
VALUE). The integrated quantity is the selected physical quantity. Integration is restarted
when a pulse is emitted.
Enter in FULL-SCALE VAL. the highest measured value
expected.
FULL-SCALE VAL. is the measured value corresponding
to the upper limit of the output range as defined in section
18.1.1.
example: The output range 4…20 mA was selected for a current loop, the zero-scale
value was set to 0 m
3
/h and the full-scale value to 300 m
3
/h.
If the volume flow is 300 m
3
/h, a 20 mA signal is transmitted to the output.
If the volume flow is 0 m
3
/h, a 4 mA signal is transmitted to the output.
Note! The menu item PULSE OUTPUT will be displayed in the program
branch OUTPUT OPTIONS only if a pulse output has been installed.
Select in the program branch OUTPUT OPTIONS the chan-
nel for which a pulse output has to be activated. Press EN-
TER.
This display will not be indicated, if the flowmeter has only
one measuring channel.
Select YES to activate the output. Press ENTER.
This error message will be displayed if the flow velocity is
selected as physical quantity.
The use of the pulse output is not possible in this case as
integration of the flow velocity does not result in a reason-
able value.
Enter the PULSE VALUE. The unit of measurement will be
displayed according to the current physical quantity.
When the totalized physical quantity reaches the pulse val-
ue, a pulse will be emitted.
Enter the PULSE WIDTH.
The range of possible pulse widths depends on the specifi-
cation of the instrument (e.g. counter, PLC) to be connect-
ed with the output.
Full-Scale Val.
300.00 m3/h
Output Options
for Channel A:
Pulse Output
NO COUNTING !
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