Place of installation / zone Sample gas non-ammable below the
lower explosive limit LEL (25% of LEL)
Sample gas is ammable and/or is oc‐
casionally above the LEL (25% of LEL)
Flame arrestor Not required 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 ame arrestors in the refer‐
ence gas path
• For ULTRAMAT 7, the ame arrestors
can be omitted when using a techni‐
cally unmodied analyzer module
Monitoring Not required
• Enclosure purging monitored
2)
Regular leak test as described in the man‐
ual
1) The above-mentioned purging monitoring in py mode is permissible according to the certicate, 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 insucient purging, since the Ex p system only provides an alarm and no automatic shutdown.
2) For the measurement of ammable 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 ammable and potentially explosive sample gas
- rack unit
Place of installation / zone Sample gas non-ammable
below
the lower explosive limit
LEL (25% of LEL)
Flammable sample gas Sample gas is ammable
and/or is
occasionally above the LEL
(25% of LEL)
ATEX II 1G (Zone 0)
Device protection level
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
ATEX II 2G (Zone 1)
Device protection level
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
Not permissible
(EPL) Ga – not approved
Installing/mounting
3.1Basic safety notes
SIPROCESS GA700 rack and wall mounted devices
Compact Operating Instructions, 06/2023, A5E35134047-AB 29
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