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3.1
Devices with Diaphragm Seal
Remove the protective cap or protective wrapping from the diaphragm only just before in-
stallation to prevent contamination or damage.
The diaphragm must not be touched. Do not place the device on its diaphragm. Even small
scratches or deformations may negatively influence the zero point or other characteristics
of the device.
Pressure transmitter and diaphragm seal are a closed system that must not be separated.
You can find further information about diaphragm seals in the document TA_031 on www.la-
bom.com.
3.2
Differential pressure devices
The high pressure side is marked with a plus (+), the low pressure side with a minus (-).
Connect the plus side to the process connection with the higher pressure. For filter monitor-
ing this is e.g. the inlet side, for level measurements it is the lower process connection.
3.3
Mechanical Installation
Use gaskets, if required, that are suitable for the process connection and resistant to the
media.
Before starting operation, check the process connection carefully for leaks under pressure.
You can use the device in any mounting position. Normally the transmitter is adjusted for a
vertical mounting position. A different mounting position in combination with a small nominal
range might cause a zero point offset. In this case a zero point adjustment might be neces-
sary.
3.4
Mount / Dismount Display
In order to dismount the display, turn off the device cover and pull out the display. The three
small studs at the outer diameter of the display (all 120°) facilitate removal.
The display cable can be disconnected either at the display or at the clamp module. When
reconnecting the cable, please take polarity (red wire) into account. Otherwise the cable will
not fit into the plug.
When mounting the display, you can choose its orientation. Complete the process by firmly
reattaching the cover.
BA_080_en_2022-01_11.02 Pressure transmitter PASCAL CV4
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