10. Select To same as CO2(II).
11. You will be prompted to confirm you want to adjust: select Yes.
12. If the adjustment is successful, MI70 will show the text Adjustment Done, after which
you will return to the adjustment mode. At this point you can press Back and Exit to
leave the adjustment mode. The adjustment is now completed. If the adjustment
cannot be applied, MI70 will show the text Cannot adjust, possibly followed by a text
stating the reason. A possible reason for an adjustment failure is attempting to apply a
very large correction to the reading.
8.10.2
1-Point Adjustment with a Reference Gas
1. Connect GMP252 to Port I of the MI70 indicator.
2. Feed a calibration gas to the GMP252 using the calibration adapter accessory (Vaisala
order code: DRW244827SP). If you are using ambient air as the calibration gas, you
must have a reference meter in the same environment to verify the CO
2
concentration.
3. Turn on the MI70 indicator.
4. Start the adjustment sequence from Main menu > Functions > Adjustments.
5. MI70 notifies you that automatic power o is disabled during adjustment mode, press
OK to acknowledge.
6. Select the CO
2
parameter when prompted.
7. You may be prompted to check the environmental settings of the reference probe
before proceeding. Press Yes to check the settings and Exit when you have checked
and corrected the settings.
Chapter 8 – Operating with MI70 Indicator
91
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