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◆Reference port (REF): If calibrator measure and calibrate the gauge pressure instruments, please keep the REF
port open. If calibrator measure and calibrator the differential pressure instruments, REF port should
be connected with reference port of UUT for isolating airflow fluctuation to obtain stable pressure
control.
◆Venting port (VENT): Venting port is used for pressure relief quickly and drain contamination. During use process, if
mist is venting out, it is recommended to collect the moisture avoiding contamination in the connected hose
◆Barometric pressure calibration port (ATM): Used for calibrating the internal barometric pressure sensor. Connect to
this port by φ4 gas hose. See 4.4.4 barometric module standard in the specific operation.
2.2 Initial preparation
2.2.1 Battery installation
As shown in Figure 2-3, Open upper battery key to install or disassemble the battery in the bottom of
the calibrator.
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