Siemens ULTRAMAT 23 Series - Hydrogen Sulfide Sensor

3.4.6 Hydrogen sul󹪝de sensor
The cyclic Autocal must be switched on, see also Application note (Page 163).
General information
Measuring ranges
• Smallest measuring range
• Largest measuring range
0 ... 5 vpm
0 ... 50 vpm
Service life of the sensor Approx. 12 months after 󹪝rst use in the ULTRAMAT 23
Shelf life Maximum of 12 months after date of manufacture
Operation mode Continuous measurement between 0 and 12.5 vpm
Discontinuous measurement between 12.5 and 50 vpm
AUTOCAL Cycle time: 1 hour (see Application note (Page 163))
Climatic conditions (restrictions)
Permissible ambient temperature
• During operation
• During transportation and storage
+5 ... +40 °C (41 ... 104 °F)
-10 ... +55 °C (14 ... 131 °F)
Permissible ambient pressure 750 ... 1200 hPa absolute
In󹪞uencing variables
Associated gases The hydrogen sul󹪝de sensor cannot be used if the associated gas contains
the following components:
• Compounds containing chlorine
• Compounds containing 󹪞uorine
• Heavy metals
• Aerosols
• Alkaline components (e.g. NH
3
>5 mg/m
3
)
Interference gases 1360 vpm SO
2
result in a cross-interference of <20 vpm H
2
S,
180 vpm NO result in a cross-interference of <150 vpm H
2
S,
no cross-interference of CH
4
, CO
2
and H
2
(1000 vpm)
Drift < 1% per month
Temperature < 3%/10 K based on full-scale value
Air pressure < 0.2 % of measured value per 1% pressure change
Measuring behavior at analog output
Output signal noise < 2% of smallest measuring range with a damping constant of 30 s
Description
3.4 Technical speci󹪝cations
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012 41