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Siemens SIPROCESS GA700 Compact Operating Instructions

Siemens SIPROCESS GA700
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Minimum requirements for explosion protection with pressurized enclosure
In principle for IEC/ATEX applications, any Expx, Expy or Expz safety equipment with a type
test certi󹪝cate for hazardous areas can be used.
This safety equipment must have at least the following features:
Safety level for monitoring:
During pre-purging: At least to Category 3 from ENISO13849-1
During operation: At least to Category 1 from ENISO13849-1
or to other comparable international standards.
Adjustable automatic pre-purging phase for Ex px/py: Purging gas 󹪞ow must be at 60 l/min
Limitation of purging gas pressure during the pre-purging phase: < 110 hPa relative
Purging gas 󹪞ow must be a monitored to be more than >= 1 l/min
Connection of purging gas lines: ∅12 mm (0.47 inch) from/to analyzer
For Ex px: Relay contacts for all-pole isolation of the analyzer's power supply (inrush current
>50A)
For Expx: Relay contacts for disconnecting additional equipment (e.g. Ex isolating relay)
Access protection against unauthorized persons
Suitable Expx safety equipment is shown in the section "Ex px safety equipment (Page107)"
using a pressurized enclosure system as an example.
For 󹪞ammable gases we recommend Ex px, as otherwise, all electric circuits for power
supply, signals and communication must be manually switched o󹪜 in the event of the failure
of purging.
Further information on the Ex p purging
When discharging purging gas ensure that the pressure drop via the exhaust air line does not
result in the following components switching o󹪜:
Ex p safety equipment during the pre-purging phase
Analyzer during the operating phase
To achieve this, the exhaust air line must be dimensioned accordingly (for example with an
inner diameter of G1", the length of the exhaust air line may be about 20 m).
Always adhere to the pre-purging time that can be set at the Ex p safety equipment.
The pre-purging time amounts to 10 minutes at a purging gas 󹪞ow rate of 60 l/min.
Do not supply sample gas to the analyzer until the pre-purging phase has ended.
OXYMAT 7: Before sample gas is supplied, the micro󹪞ow sensor must be reliably 󹪞ushed by
reference gas. The reference gas must therefore also be connected (pre-purging period -
10min) when the Ex p safety equipment is switched on.
Note that the reference gas pressure must always be 2000 hPa 150 hPa) above sample gas
pressure.
Connecting
4.7Connecting the wall-mounted device
SIPROCESS GA700 rack and wall mounted devices
56 Compact Operating Instructions, 06/2023, A5E35134047-AB

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Siemens SIPROCESS GA700 Specifications

General IconGeneral
BrandSiemens
ModelSIPROCESS GA700
CategoryMeasuring Instruments
LanguageEnglish

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