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2.1.2 Pressure zeroing
Zero the pressure measurement by pressing .
( Gauge or differential pressure
zero if the measuring pressure is in the range
of (-1% ~ 1%) FS. First, connect the pressure
port with atmosphere. Then after the data is steady,
press to zero.
( ) Absolute pressure:
It is difficult to pull a hard vacuum to absolute zero.
Because of this we have developed the following
zeroing procedure to zero the ADT672 absolute sensors.
a. Connect the ADT672 to a vacuum source or to
atmosphere, with a reference standard The reference
pressure is . The ADT762 is .
The ADT762 will need to be zeroed if there is a difference between and
b. The first digital starts to flash by pressing . Input the pressure value .
c. Zeroing operation is finished if the pressure is changed from to .
User could cancel the previous zeroing by select the 7th option .
1)
2
:
.
Pstandard Pmeasure
Pstandard Pmeasure.
Pstandard
Pmeasure Pstandard
Attention:
input
1.The displayed pressure is 100.02,
but the actual pressure is 100.00
2.First digit start to flash
3.Input the actual atmosphere
pressure 100.00
4.After confirmation,the measured
data i 100.00s
press
Figure 2-1-2: Absolute pressure to zero
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