Siemens ULTRAMAT 23 Series - Calibration: Electrochemical Oxygen Measuring Range; Calibration: O2 Measuring Range: Sensor Inst. Date; Calibration: O2 Measuring Range: Calibrating the O2 Zero Point

Set span: 386 mg/m
Reading: 380 mg/m
Calibration o.k.
Press ESC to return
8212b
3
3
The analyzer then compares the setpoint and actual value
(measured value) of the calibration. If the deviation between the
values is within the tolerance, the message 'Calibration o.k.' ap‐
pears.
Set span: 386 mg/m
Reading: 121 mg/m
Tolerance not o.k.
Press ESC to return
3
3
8212c
If the actual value deviates by more than approx. 20% from the
setpoint determined in the factory, the message 'C-Tolerance not
o.k.' appears instead (no calibration possible).
By pressing the <ESC> key you can exit the calibration procedure.
8.2.2 Calibration: Electrochemical oxygen measuring range
822
O2 cal after install
Start O2 zero cal.
Start O2 span cal.
In this menu you can call the following functions for the elec‐
trochemical oxygen sensor in order to:
• Enter the installation date of the electrochemical O
2
sensor
• Recalibrate the zero point of the electrochemical O
2
sensor
• Recalibrate the measuring range of the electrochemical O
2
sensor
8.2.2.1 Calibration: O2 measuring range: Sensor inst. date
O2 cal after install
Date: 30.11.2012
8221
You must enter the date every time a new sensor is installed.
The entered date is checked for plausibility. This is followed by a
full-scale calibration (AUTOCAL function) with ambient air.
A check is also carried out during this procedure that the probe
voltage is greater than 9 mV. If this is not the case, a fault mes‐
sage "Probe voltage too low" is output.
8.2.2.2 Calibration: O2 measuring range: Calibrating the O2 zero point
O2 zero cal. with N2
0.18 % O2
Nitrogen flow please
Correct with ENTER
8222
You can use this function to re-adjust the zero point of the H
2
S
sensor with nitrogen. Connect nitrogen to the sensor and com‐
mence the calibration with <ENTER>.
O2 zero cal. with N2
1.25 % O2
>1% => default value
Press ESC to return
8222a
Following calling of the correction function, the current oxygen
value is displayed in the second line. If the displayed value does
not deviate by more than 1% from the set value, it is used as the
new zero point.
If the deviation is greater than 1% (as is the case in the example
on the left, see third line), a 󹪝xed default value is used instead.
Functions
8.2 Calibration
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012 117