Hach ORBISPHERE 3100 Manuel D'utilisation Simplifié page 18

6.3.2.2 High level adjustment
There are three possible modes for high level adjustments:
• Using a reference gas mixture (gas cylinder)
• Using a known oxygen sample (reference sample)
• Enter a factory parameter provided by Hach (this option is only required when the sensor spot has
been replaced)
If the calibration mode displayed is not the required mode, then press the Enter key and select the
required mode from the three options available in the drop-down list:
• Factory parameter
• Reference sample
• Ref. gas bottle
6.3.2.2.1 Factory parameter
1. In the Calibration mode window select Factory parameter
2. Scroll down to the Reference value window and enter the factory parameter as found on the
package of the LDO spot (model number DG33218)
3. Scroll down to the Start Calibration window and press the Enter key to start the calibration
4. Accept (OK) or reject (Cancel) the new calibration data
6.3.2.2.2 Reference sample
1. Run the reference sample through the instrument and adjust the flow to approximately
150 mL/min.
2. In the Calibration mode window select Reference sample
3. Scroll down to the Reference value window and enter the oxygen value of the sample
4. Let the sample run through the instrument for 5 minutes to stabilize the measurement
5. Scroll down to the Start Calibration window and press the Enter key to start the calibration
6. Wait until the Signal in range and Stability reached fields display Yes which indicates the
calibration is within acceptable limits. The Calibration possible field should also display Yes at
this point. Press the Enter key to complete the calibration
7. Accept (OK) or reject (Cancel) the new calibration data
6.3.2.2.3 Ref. gas bottle
1. Rinse flow path with 20 mL of ethanol (EtOH) using the syringe and connectors supplied in the
tool kit
2. In the Calibration mode window select Ref. gas bottle
3. Scroll down to the Reference value window and enter the oxygen value of the reference gas in
%Vbar
4. Connect the gas sample to the instrument and adjust the flow to approximately 100 mL/min.
5. Let the gas mixture run through the instrument for 5 minutes to stabilize the measurement
6. Scroll down to the Start Calibration window and press the Enter key to start the calibration
7. Wait until the Signal in range and Stability reached fields display Yes which indicates the
calibration is within acceptable limits. The Calibration possible field should also display Yes at
this point. Press the Enter key to complete the calibration
8. Accept (OK) or reject (Cancel) the new calibration data
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