3 | Installation
FISCHER Mess- und Regeltechnik GmbH
10/40
BA_EN_DE45_ATEX_LCD
3 Installation
3.1 General
The device is designed for installation onto flat assembly plates. For screw con-
nection to the assembly plate, the device features four assembly bores on its
back, which can be used for Ø 3.5 mm tapping screws.
Optionally, the device can be delivered with a wall-mounting plate. This is also
available as accessory.
At the factory, the device is calibrated for vertical installation, but the installation
position is arbitrary. For any installation positions that are not vertical, the zero-
point signal can be corrected via the installed offset correction.
The enclosure protection type IP 65 is only guaranteed, if a suitable power sup-
ply cable is used (see accessories).
If the device is intended for outdoor use, we recommend permanently protecting
the membrane keypad against UV radiation and using a suitable enclosure or at
least the erection of a sufficiently dimensioned canopy as a protection measure
against constant rain or snow.
WARNING
Falling objects
The operator must ensure that any falling objects cannot collide with the in-
stalled unit. Steps must be taken to prevent
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sparks being generated on impact.
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invalidation of the protection class of the casing.
1. This can be avoided by attaching protective cover,
2. a protective casing or
3. a similar element.
3.2 Process connection
• By authorized and qualified specialized personnel only.
• The pipes need to be depressurized when the instrument is being connec-
ted.
• Appropriate steps must be taken to protect the device from pressure surges.
• Check the suitability of the instrument for the media that is to be measured.
• Maximum pressures must be observed (cf. Tech. data)
CAUTION
Do not blow into the pressure connections.
This can damage the pressure sensor.
Fig. 3:
Process connection
The pressure measuring lines must be installed on a gradient so that no water
pockets for gas measurements can be created. If the required incline is not
reached, water filters need to be installed at suitable points.
The pressure sensing lines need to be kept as short as possible and installed
without sharp bends to avoid interfering delay times.
The pressure connections are marked with (+) and (-) symbols on the device.
When the differential pressure is measured, the higher pressure is connected to
the (+) side and the lower pressure to the (-) side.
