Point adjustment with a reference gas, Figure 27, Functions menu – Vaisala GMP231 User Manual
Page 83: Figure 28, Mi70 adjustment mode
Chapter 7 _________________________________________________ Operating with MI70 Indicator
VAISALA ________________________________________________________________________ 81
1-Point Adjustment with a Reference Gas
1.
Connect the GMP231 to Port I of the MI70 indicator.
2.
Feed a calibration gas to the GMP231 using the calibration adapter
accessory. 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.
1403-131
Figure 27
Functions Menu
5.
MI70 notifies you that automatic power off 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.
8.
The adjustment mode is now active, and you can see the measured
CO
2
reading on the screen. To proceed with the adjustment, press
Adjust.
1403-132
Figure 28
MI70 Adjustment Mode
9.
Select 1-point adjustment.