4.4.2
Connection of Mycom CPM 152-Z in Ex areas
General instructions about installation in potentially explosive surroundings
Instruments with the letter Z (standing for
“certificate”) in their name have been
manufactured and tested in accordance
with the standardised European regulations
(CENELEC) for “Electrical equipment for
potentially explosive surroundings”. A copy
of the conformity certificates issued by the
Bergbau-Versuchsstrecke (BVS) is enclosed
with this instruction manual.
There are detailed standards covering both
production and operation, in Germany
including:
• “Decree about electrical equipment in
potentially explosive surroundings” (Elex V)
Make sure you comply with DIN VDE 0165
in the installation of your instrument!
Make sure you comply with Elex V § 9 when
your are repairing or modifying
electrical equipment!
• “Decree about flammable liquids” (VbF)
• “Equipment Safety Act” (GSG)
• “Explosion guidelines issued by the work
safety association of the chemicals
industry” (EX-RL)
• “Accident prevention regulations: electrical
equipment”
The measuring transmitter Mycom CPM 152-Z
is manufactured in accordance with the
explosion protection regulations and is
allowed to be installed in Zone 1 and 2.
Electrodes (measuring chains) that are
suitable for the instrument can also be
operated in Zone 1 without a separate
approval, because their electrical data
mean that they are safe in themselves. Other
equipment may only be connected to the
Mycom measuring transmitter (with explosion
protection) - Z models - if this equipment has
an electrical input circuit that is intrinsically
safe.
Warning:
Display cover has to be closed
during operation under ex conditions.
Note:
Useful information about the
installation and operation of
electrical equipment in potentially
explosive surroundings can be
found in the Hauser
brochure GI 003/11/en “Explosion
protection of electrical equipment
and systems”. This brochure can be
ordered from the Hauser
sales offices.
PARAM
MEAS
CAL
DIAG
PARAM
MEAS
CAL
DIAG
Ex zone 1
non-Ex range
Measuring current
circuit ia
Supply circuit
PM
1
52-EX.CDR
Signal output
circuit ib
Fig. 4.11
Electrode and measuring
transmitter in the
explosion area
Installation
mycom CPM 152
12
Hauser