Analyzers In Biogas Plants; Safety Information - Siemens 6 Series Compact Operating Instructions

2.3

Analyzers in biogas plants

DANGER
Danger of poisoning
The ULTRAMAT 23 is used, among other things, for the measurement of hydrogen sulfide (hydrogen sulfide, dihydrogen
sulfide, H S).
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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 S concentrations of 500 vpm longer than 30 minutes can cause fatal poisoning. Concentrations above
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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
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 the environment!
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Before you begin maintenance on the analyzer, make sure that the H
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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 .
Check for leaks in the analyzer at regular intervals!
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DANGER
Danger of explosion
When the device is used in biogas plants, you should expect that the sample gas will contain methane (CH
explosive mixtures with oxygen or air in certain concentrations. These conditions might occur under certain operating
states of the plant. These operating states are to be avoided in the plant.
3 Assembly/installation
3.1

Safety information

WARNING
Wetted parts unsuitable for the process media
Danger of injury or damage to device.
Hot, toxic and corrosive media could be released if the process medium is unsuitable for the wetted parts.
Ensure that the material of the device parts wetted by the process medium is suitable for the medium. Refer to the
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information in "Technical data".
NOTICE
Incorrect mounting
The device can be damaged, destroyed, or its functionality impaired through improper mounting.
Before installing ensure there is no visible damage to the device.
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Make sure that process connectors are clean, and suitable gaskets and glands are used.
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Mount the device using suitable tools. Refer to the information in Technical specifications (Page 26).
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S concentration in the analyzer is close to 0 vpm.
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Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
S and you therefore need to take following
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A5E45779144002-01, 09/2018
), which forms
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