Calibrating the sensitivity
82321
Set sp.: 1.25 %
Reading: 0.11 %
Connect span gas
O2 span calibr.
Setpoint MR 1+2
Start cal. MR 1+2
8223
If the adjacent display appears, perform the full-scale calibration
as follows:
1. Connect the sample gas inlet to the calibration gas
2. Inject calibration gas with a ow rate of 1 ... 1.2 l/min
3. Position the cursor at the beginning of the 3rd line (Start
calibration) and press the <ENTER> key.
Once the intended ow rate has been reached, the message
'Correction with ENTER' appears in the 4th line of the display.
4. Wait until the displayed measured value has stabilized.
5. Start the calibration by pressing the <ENTER> key.
6. To exit the menu, press the <ESC> key.
The measuring range of the paramagnetic oxygen sensor is calibrated as standard with ambient
air during each AUTOCAL. However, individual calibration with a freely selectable setpoint
between 2 vol% and 100 vol% O
2
is also possible.
Note
If an individual calibration has been carried out using calibration gas, the next AUTOCAL
overwrites this calibration. The AUTOCAL must be deactivated if this is not required. To do this:
1. Navigate to the input menu (823) and
2. set the "Autocal O2 sens." parameter there to the value 'NO'.
Adjust setpoint
You can use this function to adjust the setpoint of the calibration gas for calibration of the
measuring range.
MR cal.
Setpoint MR 1+2
Start cal. MR 1+2
8232
If the adjacent display appears, adjust the setpoint as follows:
Position the cursor at the beginning of the 2nd line (Setpoint)
and press the <ENTER> key.
The adjacent display appears.
• Now enter the desired setpoint using the arrow keys, and
then press the <ENTER> key.
• Exit the menu by pressing the <ESC> key.
8.2.4 Calibration: H2S sensor
You rst need to select the H
2
S sensor in order to adjust it. To do this, navigate in the operator
menu as follows:
Functions
8.2 Calibration
ULTRAMAT 23
120 Equipment Manual, 04/2022, A5E37100388-012
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