Siemens ULTRAMAT 6 Series - Analyzers in Biogas Plants Outside the Hazardous Area

WARNING
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 o󹪜 all physical variables such as
pressure, temperature, electricity etc. or that they have a harmless value.
• If the device contains hazardous media, it must be emptied prior to disassembly. Make sure
that no environmentally hazardous media are released.
• Secure the remaining connections so that no damage can result if the process is started
unintentionally.
2.3 Analyzers in biogas plants outside the hazardous area
DANGER
Danger of poisoning
The ULTRAMAT 23 is used, among other things, for the measurement of hydrogen sul󹪝de
(hydrogen sul󹪝de, dihydrogen sul󹪝de, H
2
S).
Hydrogen sul󹪝de is highly toxic even in small concentrations! The odor threshold for hydrogen
sul󹪝de 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
2
S concentrations of 500 vpm longer than 30 minutes can cause fatal poisoning.
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
2
S and you
therefore need to take following continual precautions to prevent the e󹪜ects of poisoning:
• Connect the gas outlet of the analyzer to a gas exhaust unit so that no gas can escape into
the environment.
• Before you begin maintenance on the analyzer, make sure that the H
2
S concentration in the
analyzer is close to 0 vpm. Before beginning work, always 󹪞ush the gas path of the analyzer
and the gas sampler with ambient air or nitrogen for a duration of about 10 minutes .
• Check for leaks in the analyzer at regular intervals.
Safety instructions
2.3Analyzers in biogas plants outside the hazardous area
Series 6 and ULTRAMAT 23
Compact Operating Instructions, 01/2024, A5E45779144002-AB 17