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Safety
Safety aspects of 854 ATG
Do not use the instrument for anything else than its intended purpose.
For medium pressure versions (till 6 bar), the 854 ATG drum compartment housing is of aluminium,
and for chemical version it is of stainless steel.
For high pressure version (max. 40 bar ; max. 25 bar in acc. to PED), the 854 ATG housing is of
stainless steel.
The housing of the 854 ATG is explosion-proof:
$
II 1/2 G EEx de [ib/ia] IIB T6 acc. to KEMA 01ATEX2092 X, certified by KEMA, Netherlands
$
Class I, Division 1, Groups B, C & , D acc. to ANSI/NFPA no. 70, certified by Factory
Mutual Research USA (FM no.: 3Q2A9.AX)
Environmental conditions for the 854 ATG are:
ambient temperature
operating pressure
relative humidity
ingress protection
The drum compartment, which is in contact with the tank atmosphere, is separated from electronic
compartment. A magnetic coupling transfers the drum movement (hence, displacer movement) to
electronic compartment.
Wiring for intrinsically safe options, such as temperature or pressure measurement, is fed via two
separate cable entries.
The 854 ATG covers can optionally be provided with sealing facilities on blocking devices, which
prevents unauthorized opening.
Improper installation of cable glands, conduits or stopping plugs
:
-40 to + 65 °C (-40 to +149 °F)
:
max. 6 bar for medium pressure and chemical version
max. 40 bar ; max. 25 bar in acc. to PED for high pressure version
:
0 - 100 %
:
IP65 (NEMA 4), suitable for outdoor installation
will invalidate the Ex approval of the 854 ATG.
Installation guide 854 ATG
Warning
Warning
Safety
Page 3
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