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ATEX Instruction Manual
ETC01035
August 2005
MLT 2 / BINOS
®
100 F
Emerson Process Management Manufacturing GmbH & Co. OHG
2 - 15
2-5 Safety Device Settings
The EEx safety device is delivered with fixed
basic parameters. The purge gas pressure
is preset to 1 hPa (rel.; for non-flammable
gases). Useful modifications such as
increasing the max. purge gas pressure
must only be done after studying the
appropriate sections of the manual of the
EEx p safety device.
As the parameters are selected to be in
conformance with the type test results, some
of them are not allowed to be changed!
This applies to the pre-purge time, which is
adjusted to ensure a 5 times volume
exchange within the analyzer enclosure at a
preset purge medium flow!
General
It is not allowed to change
the internal purge medium
path.
Category 2
Category 2 equipment is provided with a key
switch which bypasses the purge system
and switches off the automatic monitoring
facility. It is therefore also possible to switch
on the pressurized system with the housing
door open for setting work resp. to keep the
analyzer powered even if the front door is
opened.
The use of this switch is
intended for maintenance
purposes only!
This facility should however
only be used when it has
been ascertained that there is
no explosive atmosphere in
the vicinity of the unit (fire
safety certificate).
When maintenance work has been finished
is has to be verified that the switch is turned
off!
The purge system M code, preset to 0001,
must be replaced by an individual code
which must then be entered.
The purge system by-pass code, preset to
0002, must be replaced by an individual
code, unequal Zero.
2-6 Special Remarks and Instructions
2-5 Safety Device Settings
For instructions on how to change the
codes see the separate pressurization
instruction manual!