Siemens ULTRAMAT 23 - Page 8

Supplement 1 for Operating Instructions C79000-G52xx-C216-03
8 A5E02769382-03, 03/2012
Operating mode
In operating mode, you can view device parameters or adjust the device and set the parameters.
This supplement only describes the functions relevant for operating the H
2
S sensor. A complete overview of all the device's
control functions can be found in the standard operating instructions of the ULTRAMAT 23 (C79000-G52xx-C216-03).
Press the ENTER key in measuring mode to start the operating mode. The main menu appears with the follow options.
Analyzer status
Calibration
Parameters
Configuration
Diagnostic control functions
H
2
S measuring capacity
To specify the value of the H
2
S measuring capacity, navigate as follow in the operator menu:
Diagnostics -> Analyzer status -> Measuring reserve - > H2S Measuring reserve.
The following screen appears:
H2S Sensor status
Reading :747,OOnA
Maint.Req.:373,50nA
Fault : 74,70nA
The H
2
S sensor ages with increasing operating time, thereby steadily decreasing its sensitivity. It has almost reached the
end of its service life (maintenance requirement) when it has lots 50% of its sensitivity. The sensor must be replaced. If the
sensitivity drops below 10%, error message S30 (sensitivity of H
2
S sensor outside tolerance limits) is output.
Diagnostic values
The displayed diagnostic values provide important information for troubleshooting and calibration tasks. To view the
diagnostic values of the H
2
S sensor, navigate as follow in the operator menu:
Diagnostics -> Diagnostic values -> Probe diagnostic values -> Choose component -> H
2
S.
The following screen appears:
Sensorsig.: 4886 nA
H2S : 6.5 vpm
Inst. Date: 05.11.2011
Inst Curr : 747 nA
This dialog shows the diagnostic values of the H
2
S sensor. They have the following meaning:
● Probe current is the current pressure-corrected current of the H
2
S sensor in nA
● H
2
S is the current hydrogen sulphide measured value in vpm. Negative values are also possible here.
● Date is the installation date of the H
2
S sensor
● Installation current is the pressure-corrected current per vpm H
2
S of the sensor at the time of installation.