General Safety Information; Safety Relevant Type Code - KROHNE BM 70 M Series Installation And Operating Instructions Manual

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General safety information

These additional "Ex" Instructions apply to the hazardous-duty versions of BM 70 M-EEx level
gauges. They are supplementary to the Installation and Operating Instructions issued for the non-
hazardous-duty versions.
The directions given in these Instructions contain only the data relevant to explosion protection.
The technical details given in the Installation and Operating Instructions for the non-hazardous-
duty versions apply unchanged unless excluded or superseded by these present Instructions.
In compliance with European Directive 94/9/EC (ATEX 100a), level gauges of the BM 70 M-EEx
series are certified in conformity with European Standards EN 50xxx for use in hazardous areas
under
by the Physikalisch-Technische Bundesanstalt (PTB).
It is absolutely necessary that the details contained in that approval certificate together with its
boundary conditions be observed.
Note:
Assembly, installation, start-up and maintenance work may only be carried out
by personnel who have been specially "trained in explosion protection".
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Safety relevant Type Code

The safety-relevant type code is made up of the following elements:
BM 70M . / . / . – E Ex
1
_______________________________
SIGNAL CONVERTER
1 Tank level measuring device
2 Signal converter series
3 Type of protection symbol for
signal outputs
4 Type of protection symbol for the
terminal compartment
5 Ambient temperature range
6 Territorial application for
explosion protection certification
7 Safety function
8 Flange system series
PTB 02 ATEX 1078
2 3 4 5 6
70M
i
unassigned
E
D
S
unassigned
E
Ex
V96
SA
BM 70M-EEx/ BM 70Mi-EEx
(1)
... . ........ - ..
7 8 9 10
____________________
FLANGE SYSTEM
Marine
intrinsically safe I/O function
non-intrinsically safe I/O function
compartment in Increased Safety "e"
(standard)
compartment as Flameproof
Enclosure "d" (option)
extended temperature range from
-40°C to +60°C
standard temperature range from
-20°C to +60°C
Europe (EC, CENELEC)
explosion-protected electrical
equipment
flange system V96
flange system SA
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