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Functions
8.1 Diagnostics
SO
2
Z: 1.000 C: 0.000
Alpha_c: +9.5290e-1
Alpha_f: -3.3477e-4
Signal strengths SO2
Meas: 335979e1
Ref.: 416329e1
8.1.2.3
Analyzer status: Diagnostics values: (Electrochemical) O2 sensor
Sensorsig : 11.11 mV
O2
Date:
Inst.volt.: 12.10 mV
108
LED curr.:
700
81261
Reading
81263
:
20.77 %
DD.MM.YYYY
Calibration values
Here you can read out various diagnostic values, which have the
following meaning:
• SO
: The relevant component
2
• LED current: The LED amperage in DAW units (maximum
2047, here in the example 700)
• Z: The signal ratio between the measuring channel and ref‐
erence channel (in the example: 1)
• C: Cross-sensitivity: This value maps the proportional cross-
correction of the respective channel (here: SO
second UV channel (NO
Note:
In the example, the value of C for the SO
0.000, because SO
2
the 2nd channel (NO
cause NO
causes a cross-sensitivity of about 16% on the SO
2
channel.
• Alpha_c and Alpha_f
These values are linearization parameters that are used to
convert measured intensity values I(C) to concentration val‐
ues C based on the Lambert-Beer absorption law:
βc
I(C) = I(0)[αe
+ 1 - α]
Alpha_f is the factory setting, Alpha_c is the value which was
last determined after the customer calibration.
Optical alignment
This screen shows the signal strengths of the measuring channel
(3rd line) and reference channel (4th line).
This dialog displays the diagnostics values of the electrochemi‐
cal oxygen sensor (option). Meaning:
• Sensorsig is the current pressure-compensated voltage of
the O
sensor in mV
2
• O
is the current oxygen value. Negative values are also pos‐
2
sible here
• Inst. date is the installation date of the O
tion Calibration: O2 measuring range: Sensor inst. date
(Page 117))
• Inst.volt is the pressure-compensated voltage of the O
sor when it was installed.
).
2
component is
2
does not cause any cross-sensitivity on
). For NO
the value of C is 0.160, be‐
2
2
sensor (see sec‐
2
Equipment Manual, 04/2022, A5E37100388-012
) onto the
2
2
sen‐
2
ULTRAMAT 23
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