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ndu
Q
®
- Series VMM
Operation
Technical changes reserved
- 31 -
Low flow cut:
The
low flow cut
is a threshold for flow
rate (percentage the upper-range value).
If the volume drops below this value, the dis-
played value and the current outputs will be
set to “ZERO.”
For selecting the desired function please use
the key
or
. After choosing the function
Low flow cut
and pressing Enter, the fol-
lowing selection field will be displayed.
Example:
The value for low flow cut can be set from 0
to 20 % in 1-percent increments.
Hysteresis for the low flow cut:
The value for hysteresis for the low flow cut
is given as a percentage of the upper-range
value. It is the flow rate, the low flow cut has
to be exceeded, to activate the display and
the outputs.
For selecting the desired function please use
the key
or
. After selecting the function
Low flow cut hysteresis
and pressing
Enter, the following selection field will be
displayed.
Example:
The hysteresis for the low flow cut can be set
from 0 to 10 % in 1-percent increments.
Note
When the creep rate is exceeded, the
analog output is set to 0/4 mA and no
pulses are output on the pulse output.
7.1.5
Flow
The FLOW functional class includes fun
c-
tions that affect lower- and upper-range val-
ues and the processing of the measured flow
rates.
Low flow cut
00 %
Low flow cut
hysteresis 0.0 %
