Endress+Hauser PROline prosonic Flow 93 Documentation Technique page 19

PROline Prosonic Flow 93

Endress+Hauser
Special conditions
1. Do not open the transmitter housing in the presence of explosive atmospheres,
because this would invalidate the EEx nR protection rating.
2. All national regulations governing installation and operation regulations are to be
observed when mounting this electrical device in an explosion hazardous area
(Cat. 3G).
3. Before switching on the device, ensure that the local power supply complies with the
range stated on the nameplate.
4. Repairs (e.g. changing the electronics module) may only be carried out when cir-
cuits are not alive. Use only spare parts supplied by E+H.
5. All technical data issued by the manufacturer are to be observed.
6. Use of the devices is restricted to mediums against which the process-wetted mate-
rials are adequately resistant.
7. Do not plug in the service connector in the presence of explosive atmospheres.
8. Only cable entries are to be used which comply with Category 3G standards.
9. At suitable, regular intervals, check all seals of the transmitter housing for leaks, and
replace unsatisfactory seals as necessary. Use only seals supplied by E+H.
General warnings
• Installation, connection to the electricity supply, commissioning and maintenance of
the devices must be carried out by qualified specialists trained to work on Ex-rated
devices.
• Compliance with national regulations relating to the installation of devices in poten-
tially explosive atmospheres is mandatory, if such regulations exist.


5