Analyzers In Biogas Plants Outside The Hazardous Area - Siemens ULTRAMAT 6 Series Compact Operating Instructions

Incorrect disassembly
The following risks may result from incorrect disassembly:
- Injury through electric shock
- Risk through emerging media when connected to the process
- Risk of explosion in hazardous area
In order to disassemble correctly, observe the following:
• Before starting work, make sure that you have switched off all physical variables such as
• If the device contains hazardous media, it must be emptied prior to disassembly. Make sure
• Secure the remaining connections so that no damage can result if the process is started
2.3

Analyzers in biogas plants outside the hazardous area

Danger of poisoning
The ULTRAMAT 23 is used, among other things, for the measurement of hydrogen sulfide
(hydrogen sulfide, dihydrogen sulfide, H
Hydrogen sulfide is highly toxic even in small concentrations! The odor threshold for hydrogen
sulfide is very low at 0.02 vpm (20 vpb), but higher concentrations result in numbing of the
olfactory receptors in the nose so that the odor is no longer perceived. Persons exposed to this
gas in concentrations up to 100 vpm for several hours exhibit symptoms of poisoning such as
fatigue, headaches, lack of appetite, lack of concentration, irritation of the mucous
membranes of eyes and respiratory tract, and throat irritations.
Inhalation of H
Concentrations above 1 000 vpm cause death within a few minutes, concentrations above
5 000 vpm cause death within a few seconds.
When using this device in plant where there may be high concentrations of H
therefore need to take following continual precautions to prevent the effects of poisoning:
• Connect the gas outlet of the analyzer to a gas exhaust unit so that no gas can escape into
• Before you begin maintenance on the analyzer, make sure that the H
• Check for leaks in the analyzer at regular intervals.
Series 6 and ULTRAMAT 23
Compact Operating Instructions, 01/2024, A5E45779144002-AB
WARNING
pressure, temperature, electricity etc. or that they have a harmless value.
that no environmentally hazardous media are released.
unintentionally.
DANGER
S concentrations of 500 vpm longer than 30 minutes can cause fatal poisoning.
2
the environment.
analyzer is close to 0 vpm. Before beginning work, always flush the gas path of the analyzer
and the gas sampler with ambient air or nitrogen for a duration of about 10 minutes .
2.3 Analyzers in biogas plants outside the hazardous area
S).
2
Safety instructions
S and you
2
S concentration in the
2
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