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Description
3.3 Function
ULTRAMAT 23
Manual, 3/2016, A5E37100388-003
29
Electrochemical hydrogen sulfide measurement
Figure 3-7
Operating principle of H
2
S sensor
The hydrogen sulfide (H
2
S) enters through the diffusion barrier (gas diaphragm) into the
sensor and is oxidized at the working electrode. A reaction in the form of a reduction of
atmospheric oxygen takes place on the counter electrode. The transfer of electrons can be
tapped on the connector pins as a current which is directly proportional to the gas
concentration.
The zero point is automatically recalibrated by the AUTOCAL function when connecting e.g.
nitrogen or air.
Automatic calibration of IR components with air (AUTOCAL)
Figure 3-8
Calibration
The ULTRAMAT 23 can be calibrated using, for example, ambient air. During this process
(between 1 and 24 hours (adjustable), 0 = no AUTOCAL), the analyzer chamber is purged
with air. The detector then generates the largest signal U
0
(no pre-absorption in the analyzer
chamber). This signal is used as the reference signal for zero point calibration. The signal U
0
also serves as the initial value for calculating the full-scale value.
Содержание ULTRAMAT 23
Страница 2: ......
Страница 10: ...Table of contents ULTRAMAT 23 10 Manual 3 2016 A5E37100388 003 Index 239 ...
Страница 18: ...Safety instructions 2 2 Analyzers in hazardous areas ULTRAMAT 23 18 Manual 3 2016 A5E37100388 003 ...
Страница 66: ...installation ULTRAMAT 23 66 Manual 3 2016 A5E37100388 003 ...
Страница 88: ...Commissioning 6 5 System setup with several analyzers in parallel ULTRAMAT 23 88 Manual 3 2016 A5E37100388 003 ...
Страница 147: ...Functions 8 4 Configuration ULTRAMAT 23 Manual 3 2016 A5E37100388 003 147 ...
Страница 160: ...Functions 8 5 Automatically executed functions ULTRAMAT 23 160 Manual 3 2016 A5E37100388 003 ...
Страница 164: ...Application note 9 1 H2S sensor with small measuring range ULTRAMAT 23 164 Manual 3 2016 A5E37100388 003 ...
Страница 184: ...Taking out of operation and disposal 12 2 Scrapping the analyzer ULTRAMAT 23 184 Manual 3 2016 A5E37100388 003 ...
Страница 194: ...Spare parts accessories 13 5 IR analyzer units ULTRAMAT 23 194 Manual 3 2016 A5E37100388 003 ...
Страница 195: ...Spare parts accessories 13 5 IR analyzer units ULTRAMAT 23 Manual 3 2016 A5E37100388 003 195 ...
Страница 196: ...Spare parts accessories 13 5 IR analyzer units ULTRAMAT 23 196 Manual 3 2016 A5E37100388 003 ...
Страница 229: ...Appendix A 4 Returned delivery ULTRAMAT 23 Manual 3 2016 A5E37100388 003 229 ...
Страница 230: ...Appendix ULTRAMAT 23 230 Manual 3 2016 A5E37100388 003 ...
Страница 238: ...List of abbreviations C 1 List of abbreviations ULTRAMAT 23 238 Manual 3 2016 A5E37100388 003 ...