Gas Supply/Discharge Lines; Sample Gases With Toxic Components - Siemens SIPROCESS GA700 Operating Instructions Manual

4.3

Gas supply/discharge lines

Suitability of gas supply/discharge lines
Unsuitable cables may result in personal injury and/or property damage. The following applies
if you use the device in hazardous areas:
• Make sure that all gas lines satisfy the requirements for operation in hazardous areas.
Note
Incorrect measured values due to burning off of sample gas
When burning off sample gas, pressure variations in the exhaust gas line may falsify the results.
We therefore recommend the following measures:
• Install a pneumatic lowpass: install a damping vessel with downstream restrictor (volume >
1 l) between the device and the exhaust line.
• Make sure that a technical expert for hazardous areas examines and approves the measures.
Only commence operation of the device following the approval.
4.3.1

Sample gases with toxic components

Due to design specifications, sample gasses with toxic components exceeding the OEL
(Occupational Exposure Limit) must not be input into the device. The limit values for the
corresponding installation location apply here.
It is the responsibility of the person operating the device, after consultation with the safety
expert in charge, to also input sample gasses with toxic concentrations which exceed the OEL.
The corresponding legal requirements must be adhered to and if necessary additional measures
taken for the specific situation.
These additional measures lie outside the influence of the device manufacturer and therefore
have to be determined by the device operators themselves.
Field device
Operating Instructions, 05/2022, A5E35640463-07
WARNING
Application planning
4.3 Gas supply/discharge lines
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