Connecting Gas; Connection Information For Devices In Explosion-Protected Version - Siemens SIPROCESS GA700 Kompaktbetriebsanleitung

Minimum requirements
In principle, any Ex px, Ex py or Ex px safety equipment with a prototype test certificate to
ATEX 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 pre-purging phase: Purging gas flow must be at ≥ 60 l/min
● Limitation of purging gas pressure during the pre-purging phase: < 100 hPa
● Connection of purging gas lines: 10 mm or 3/8" diameter from/to analyzer
● Inlet pressure for purging gas supply: 0.2 ... 0.4 MPa
● Relay contacts for all-pole isolation of the analyzer's power supply (inrush current >50 A)
● 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 111)" using a pressurized enclosure system of the company Gönnheimer Elektronik
GmbH as an example.
5.1.6

Connecting gas

5.1.6.1

Connection information for devices in explosion-protected version

Note
Installation of flame arresters when used in potentially hazardous areas
OXYMAT 7: When introducing combustible and/or occasionally explosive media, install
suitable flame arresters in the sample gas and reference gas path directly at the device.
ULTRAMAT 7 / CALOMAT 7: The installation of flame retarders is not required.
Devices in explosion-proof design
Compact Operating Instructions, 11/2019, A5E35134047-04
Connecting
5.1 Gas connections
43