Setting Of Utility Functions; Pressure Zero Adjustment - Hitachi L-2100 Instruction Manual

4.3

Setting of Utility Functions

Utility functions such as zero adjustment of pump pressure, selection of pump pressure unit
and column flushing are settable as follows.

4.3.1 Pressure Zero Adjustment

You do not need to perform a pressure zero adjustment every day. The zero point may
change due to a secular change of the pressure sensor, etc. Check the pressure zero point
once a month. If it has drifted, then stop the pump, open the drain valve and carry out the
following operation.
Monitor screen
UTLTY
UTILITY CONDITION=1 UNIT=2 FLUSH=
1 EVENT 4 LINK= OTHERS=6
Select CONDITION .
CONDITION SET Z-ADJ=1 MOTOR-CTRL=2
1 PURGE=3, CALIBRATION=4
Select Z-ADJ (PRESS ZERO ADJUST).
PRESS ZERO ADJUST: YES=1,
(OPEN DRAIN VALVE)
Open the drain valve, and then enter 1.
Monitor screen
PRESS indication becomes "0" and the pressure zero adjustment is finished.
NO=0
0
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