Siemens ULTRAMAT 23, Руководство пользователя, Страница: 42 / 244

Description
3.4 Technical specifications
ULTRAMAT 23
42
Manual, 3/2016, A5E37100388-003
3.4.6 Hydrogen sulfide sensor
H
2
S sensor for measuring range from 5 to 50 vpm H
2
S
General information
Measuring ranges
• Smallest measuring range
•
Largest measuring range
0 ... 5 vpm
0 ... 50 vpm
Service life of the sensor Approx. 12 months
Operation mode Continuous measurement between 0 and 12.5 vpm
Discontinuous measurement between 12.5 and 50 vpm
AUTOCAL Cyclic adjustment (see H2S sensor with 'small' measuring range
(Page 161))
Climatic conditions
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
Maximum operating altitude 2000 m above sea level
Influencing variables
Associated gases
The hydrogen sulfide sensor cannot be used if the associated gas con-
tains the following components:
•
Compounds containing chlorine
• Compounds containing fluorine
•
Heavy metals
• Aerosols
•
Alkaline components (e.g. NH
3
>5 mg/m
3
)
Cross-inference (interfering 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 referred to full-scale value
Air pressure < 0.2 % of measured value per 1% pressure change
Note
Measuring ranges
The exact specification of the largest and smallest H
2
S ranges can be found on the label!