HYDAC HMG 3000 - Manual (Page 29)

HMG 3000 Page 29
Edition 11/2007 - V02 R01-S02 Stock no.: 669712
6.1.3 Zeroing Measurement Channels
You can rezero the measurement channels
in the Settings menu. This function is used
to mask out backpressure buildups present
in the system. For example, if a pressure of
3 bar is present at a pressure transmitter
despite the facility having been switched off,
this value can be used as the new zero point
for display purposes.
Rezeroing can be done at any point
throughout the measurement range of a
measurement channel.
In the Settings menu, select Zero
measurement channels
, and then confirm
via OK. The screen at the right appears. You
are now prompted to select a measurement
channel. Select the channel which you would
like to zero using the arrow keys, and then
confirm via OK. Then select Set followed by
OK
— you have zeroed the channel. You
can delete the changed zero point via
Delete
.
All measurement channels which have
been rezeroed are
indicated by an arrow
in front of their designation for safety
reasons (see screenshot).
Warning!
A high pressure may still be present in a
measurement channel marked by an arrow
even though the pressure reading shows
0 bar. When removing a sensor or other
system components make sure the system
has been depressurized first. Failure to do
this may pose a hazard to life and limb.