Matrix Process Control Manual page 14

Pressure control
apparatus
and the valve is fully open (100%).
10) NB if the pump is heard to run, but no flow is
observed, firstly make sure that the propor-
tional valve is fully open.
Zeroing the apparatus.
Before using the apparatus you may need to ze-
ro the unit. To do this:
1) Load the 'Open ManualControl.bat' file, Run
the program, Open the valve until pressure
equalises with atmospheric pressure and ad-
just the valve for maximum loss.
2) Click on the Zero button on the screen.
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Page 14