Siemens ULTRAMAT 23 Series - Calibration: O2 Measuring Range: Calibrate Measuring Range

Note
The gas exchange takes place very slowly with low oxygen concentrations. In such cases we
recommend 󹪞ow periods of approx. 30 minutes before you use the current value.
8.2.2.3 Calibration: O2 measuring range: Calibrate measuring range
You can calibrate the sensitivity of the electrochemical O
2
sensor using this function.
O2 span calibr.
Setpoint MR 1+2
Start cal. MR 1+2
8223
The adjacent menu display appears when you select the func‐
tion.
Start the calibration procedure by positioning the cursor to the
3rd line and pressing the <ENTER> key.
82231
Set sp.: 1.25 %
Reading: 0.11 %
Connect span gas
The analyzer interrupts the current measurement when the cal‐
ibration procedure is selected and expects a 󹪞ow of calibration
gas.
The entered setpoint is displayed in the 󹪝rst line and the actually
measured value in the second line.
82231a
Set sp.: 1.25 %
Reading: 0.11 %
If the reading is
stable, press ENTER
If the analyzer recognizes a 󹪞ow of calibration gas, the display
changes as shown. If the measured value in the second line
remains constant for more than approx. 10 s or does not change
signi󹪝cantly, press the <ENTER> key.
82231b
Set sp.: 1.25 %
Reading: 1.21 %
Calibration o.k.
Press ESC to return
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 adjacent message 'o.k.' is
output.
82231c
Set sp.: 1.25 %
Reading: 3.21 %
Calibration not o.k.
Press ESC to return
If the actual value deviates by more than approx. 20% from the
setpoint determined in the factory, the message 'not o.k.' ap‐
pears instead (no calibration possible). The causes of this mes‐
sage can include:
• Incorrectly entered setpoint
• Calibration gas concentration does not agree with entered
value
• The 󹪞ow of calibration gas is insu󹪟cient
Note: If there is no 󹪞ow of calibration gas, the display in
Fig. 82231 remains until the calibration gas 󹪞ow exceeds the
minimum value.
By pressing the <ESC> key you can exit the calibration procedure.
Functions
8.2 Calibration
ULTRAMAT 23
118 Equipment Manual, 04/2022, A5E37100388-012