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5.5
Measuring Pressure
Warning
To avoid a violent release of pressure in a pressurized system, shut off the valve and
slowly bleed off the pressure before you attach the pressure module to the pressure
line.
Caution…
To avoid damaging the pressure module from overpressure, never apply pressure
above the rated maximum printed on the module.
To avoid damaging the pressure module from corrosion, use it only with specified
materials. Refer to the pressure module documentation for material compatibility.
To measure pressure, follow the principle of navigating through the functions described
in the guidelines in section 4.2 and proceed as follows
:
1. Connect the pressure module to the ASC-400 calibrator, as shown below in Figure
6.
Note…
The APM might take a while to start up. The module is a complete pressure
measuring system with a microcontroller system inside.
The calibrator can measure pressure on both the upper and the lower display. This
makes it possible to measure pressure in two different units at the same time.
2. Select either the upper or lower display to work from.
3. Select “Pressure” from the Upper or Lower Mode list.
4. Select type of pressure, Gauge or Absolute (If barometer is mounted in ASC-400).
5. Select the desired measuring unit from the Units list.
6. Zero the pressure module (see section 5.5.1 for using the zeroing function).
7.
Leak rate is automatically calculated in the selected pressure unit / minute.