Application Note - Siemens ULTRAMAT 23 Series Equipment Manual

Application note

This section reflects the experiences gained with operation of a hydrogen sulfide sensor for a
measuring range of 5/50 vpm H
Packaging
The transport packaging is not gas-tight. To prevent drying-out of the sensor and the possibility
of malfunctions, the sensor must be used in the ULTRAMAT 23 within 1 year of the date of
manufacture.
Spare part
For logistical reasons, a period of 9 months can elapse between the date of manufacture of the
sensor and its arrival at the location of use. This duration is not harmful for the subsequent use
of the sensor. The service life is still 12 months in this case.
Storage and transport
Storage at an excessively high humidity (tropics, several months) results in swelling of the
electrolyte which could damage the electrolyte vessel.
As a rule of thumb: The sensor can be used for 12 months following manufacture and storage.
Battery
The ULTRAMAT 23 must be operated continuously since the H
whose voltage is retained through operation of the ULTRAMAT 23.
With the analyzer switched off, the power supply to the sensor is from its own battery. The
resulting discharging of the battery impairs the sensor functionality and results in zero and span
drifts as well as increased signal noise This malfunction may last for 2 days or longer.
Materials used in the sample gas path
As a result of its polarity and good solubility in water, H
These adsorption and desorption effects lead to increases in the response times. Therefore, the
inlet piping for the sample gas should be made of PTFE. Other materials should only be used for
short gas lines.
Ambient temperature
The influence of ambient temperature on the sensor is 3%/10 °C, referred to the full-scale value;
this corresponds to 1.5 vpm/10 °C.
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012
S.
2
S sensor has its own battery
2
S accumulates on various materials.
2
9
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