Unit - Siemens SIPROCESS GA700 Compact Operating Instructions

Place of installation / zone
Flame arrestor
Monitoring
1) The above-mentioned purging monitoring in py mode is permissible according to the certificate, but is explicitly not
recommended by SIEMENS. As a manufacturer,
we generally recommend the use of a purge monitor in px operation. The py operation requires immediate intervention by the
operator in the event of
failure or insufficient purging, since the Ex p system only provides an alarm and no automatic shutdown.
2) For the measurement of flammable gases, a px monitoring system (option E72) is recommended, since with py purge
monitoring it must be ensured that
remedial action is taken immediately in the event of malfunction.
3.1.2.2 Hazardous zones/danger through flammable and potentially explosive sample gas
- rack unit
Place of installation / zone
ATEX II 1G (Zone 0)
Device protection level
ATEX II 2G (Zone 1)
Device protection level
SIPROCESS GA700 rack and wall mounted devices
Compact Operating Instructions, 06/2023, A5E35134047-AB
Sample gas non-flammable below the
lower explosive limit LEL (25% of LEL)
Not required
Not required
Sample gas non-flammable
below
the lower explosive limit
LEL (25% of LEL)
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
Sample gas is flammable and/or is oc‐
casionally above the LEL (25% of LEL)
For OXYMAT 7 and CALOMAT 7: Flame
arrestor recommended for sample gas
inlet and outlet;
For OXYMAT 7 monitoring of the refer‐
ence gas or flame arrestors in the refer‐
ence gas path
• For ULTRAMAT 7, the flame arrestors
can be omitted when using a techni‐
cally unmodified analyzer module
• Enclosure purging monitored
Regular leak test as described in the man‐
ual
Flammable sample gas
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
Installing/mounting
3.1 Basic safety notes
2)
Sample gas is flammable
and/or is
occasionally above the LEL
(25% of LEL)
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
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