FISCHER DE49 A Series, Operating Manual

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3 | Assembly FISCHER Mess- und Regeltechnik GmbH
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3 Assembly
3.1 General
The device is designed for installation onto flat assembly plates or walls.
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
The process connection may only be realised by authorised and qualified spe-
cialists that have undergone additional training or briefings or have a permit to
work on explosion-protected units in potentially explosive systems.
Risks emanating from pressure on the instrument should be prevented by
means of suitable action.
• The device may only be installed in Zone 1 or 2 or Zone 21 or 22.
• The process connection may only be connected with Zone 0.
• 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 that the device is suitable for the medium being measured.
• Check whether the allowed maximum pressures and temperatures are ob-
served.
CAUTION
Do not blow into the pressure connections.
This may damage the sensor.