Analyzers In Hazardous Areas - Siemens 6 Series Compact Operating Instructions

2.2

Analyzers in hazardous areas

WARNING
Unsuitable device for the hazardous area
Danger of explosion.
Only use equipment that is approved for use in the intended hazardous area and labelled accordingly.
•
The sample gas exhaust lines must terminate outside the hazardous area at a harmless location. The sample gas exhaust
line can also be returned to the sampling point.
The maximum permissible sample gas pressure in the analyzer depends on the device version and is described in the
section Technical specifications (Page 26) under the item "Gas inlet conditions".
Install the ULTRAMAT 23 and CALOMAT 6E gas analyzers in an appropriate enclosure. This enclosure must be suitable for
use in Zone 2 and comply with the requirements of EN 60079-7 and EN 60079-15.
Furthermore, you must use appropriate measures to ensure that interferences cannot lead to a deviation from the rated
voltage of more than 40%.
You must only connect devices which do not generate sparks during operation to non-intrinsically-safe circuits in Zone 2.
These devices must be suitable for operation in hazardous areas of Zone 2 and the conditions present at the location of use.
You must perform a leak test following all installation and maintenance work affecting the containment system.
2.2.1 CALOMAT 6E
DANGER
Explosion hazard
Frequently or permanently explosive gas mixtures must not be connected.
Rarely or occasionally explosive gas mixtures may be connected in accordance with the special conditions specified in the
corresponding certificates.
Install the CALOMAT 6E gas analyzer in a suitable enclosure. This enclosure must be suitable for use in Zone 2 and comply
with the requirements of EN 60079-7 and EN 60079-15. Enclosure and analyzer must satisfy IP54 protection when
assembled and be designed for all ambient conditions which can occur during operation.
When installing in control cabinets, provide suitable ventilation measures to guarantee an air change of at least one per
hour.
If the sample gases can be occasionally potentially explosive, you must install suitable flame arrestors in the sample gas
inlet and outlet. A flame arrestor can be omitted at the outlet if the sample gas is routed into a non-hazardous area.
Ensure that no absolute sample gas pressures higher than 1.1 bar (110 kPa) can occur.
2.2.2 ULTRAMAT 23
DANGER
Explosion hazard
Gases or gas/air mixtures whose composition is between the lower and upper explosive limits must never be introduced!
You therefore need to take measures which prevent the formation of an explosive gas mixture inside the enclosure.
•
Ensure that the device is operated without pressure at the sample gas outlet.
Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
A5E45779144002-01, 09/2018
7