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

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