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Warning!
6
Notified body
Approval for the Promass measuring system was carried out by the following
notified body:
DMT:
Deutsche Montan Technologie GmbH
Center for Electrical Equipment Safety
Bergbau-Versuchsstrecke
Special conditions
1. Potential matching must exist along all current loops.
2. The maximum values on terminals 20 to 27 of transmitter type Promass 64
are U
= 260 V and I
m
(Does not apply to Promass 64****-**********S with intrinsically safe output circuits)
3. The required temperature class, based on the ambient temperature and the fluid
temperature, must correspond to the tables on page 4.
4. For connecting the electronics enclosure via conduit entries the associated
sealing device shall be mounted directly to the enclosure.
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.
• In the Ex version the transmitter housing can also be rotated in 90° steps. Instead of
a bayonet catch like in the standard version, it turns over a thread. The pits to
center the safety Allen head screw are arranged in 90° steps to prevent any
unwanted turning of the transmitter housing. During operation, the transmitter
housing may be turned by max. 180° (in either direction) without infringing upon the
Ex regulations.
• For rotating the display, it is only permitted to open the housing screw cover
after power has been removed.
= 500 mA.
m
Promass 64
Endress+Hauser
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