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ENGLISH
3.0 Pump system
If you want to check/calibrate manometers, transducers or transmitters,
it is a good idea to use a hand pump to generate pressure for the test.
This pump can be delivered with all EPM systems, but may also be
purchased separately.
3.1 General
precautions
When using pump systems, both Ametek’s and others, you should pay
attention to the following to avoid a lot of inaccurate measurements:
Air that is compressed becomes hot and will consequently expand.
Contrary to this, the temperature will decline, when the pressure is
reduced, which again will cause an increased reduction of the pressure.
To take this phenomenon into account, it is advisable to wait 15 to 20
seconds, before making any adjustment/ calibration. Also, it is
important not to bend, press or move the hose during test, as this will
change the volume of the hose and thereby the pressure.
3.2
Fitting of hand pumps and hoses
The instrument has been designed for pressure hoses with an inner
diameter of 4 mm and a wall thickness of 1 mm. The pressure hose is
fitted by unscrewing the clamping nut, sliding the hose on to the
stepped shaft and refitting the nut. Do not tighten fittings attached to
the pressure ports to a torque greater than 4 Nm otherwise the
pressure seals and the instrument will be damaged.
Connect pump and manometer using the T-piece. This leaves a free
”test port”, which can be used for your measurements. Typically,
