Endress+Hauser promag 31 Ex-Dokumentation Zu Den Betriebsanleitungen Seite 17

Promag 31 (model '99)
Special conditions
1. It must be ensured that the conditions fixed in "Temperature tables" are fulfilled
regarding class of temperature and liner material with respect to the ambient and
fluid temperature.
2. It must be ensured that the fluid to be measured has no harmful impact on the
liner material. Information regarding this can be optained from your E+H sales
center.
3. Potential matching must exist along all current loops. It is to be ensured that the
sensor is connected to the potential matching system.
4. For the IP 68 transmitter version, only approved (EEx e II, IP 68, min. 3 m immer-
sion depth) cable glands are to be used.
5. All national regulations governing installation and operation regulations are to be
observed when mounting this electrical device in an explosion hazardous area
(Cat. 3G/Zone 2).
6. Before switching on the device, ensure that the local power supply complies with
the range stated on the nameplate.
7. Repairs (e.g. changing the fuse or electronics module) may only be carried out
when circuits are not alive.
8. All technical data issued by the manufacturer are to be observed.
9. For transmitters installed in zone 2, cable entries are to be used which fulfil
the requirements of the applicable standards according to categorie 3G/Zone 2.
10. In the remote version, the cable specified by the manufacturer must be used
between the sensor and transmitter (see cable specifications page 7).
11. The maximum ambient temperature for the transmitter electronics is +50 °C and
the T5 temperature class.
General warnings
• The mounting, electrical installation, commissioning and maintenance are to be
carried out by qualified personnel only who are also trained in explosion protection.
• All national regulations concerning the installation of instruments in explosion
hazardous areas must be observed.
• It is only permitted to open the instrument after observing a cooling time of
ten minutes after power has been removed.
• For rotating the display, it is only permitted to open the housing screw cover
after power has been removed.
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