14
11041781.04 01/2020 EN/DE
Pressure gauge with reed contact model 851-A, for Ex areas
EN
3.10 Special conditions for safe use (X conditions)
1. The permissible ambient temperatures might not be marked
on the instrument, but they can be taken from these operating
instructions.
2. The user shall consider that heat may be transferred along the
instrument and the equipment shall not exceed the maximum
permitted ambient temperature. For details, refer to the operat-
ing instructions.
3. The equipment may incorporate an integral cable. The user
shall ensure that, when installed, the cable is fixed in place
and is protected from mechanical damage.
4. For Group III applications, under certain extreme circumstanc-
es, the non-metallic coating of the enclosure of this equipment
may generate an ignition-capable level of electrostatic charge.
Therefore, the equipment shall not be installed in a location
where the external conditions are conducive to the build-up of
electrostatic charge on such surfaces. The user/installer shall
implement precautions to prevent the build-up of electrostatic
charge, e.g. locate the equipment where a charge-generating
mechanism (such as wind-blown dust) is unlikely to be present
and clean with a damp cloth.
3. Safety
T-Ref
