User's Guide _______________________________________________________________________ 
66  ___________________________________________________________________ M211659EN-C 
When adjusting the transmitter, you can also correct your reference 
concentration (for example, the value on the gas cylinder label) according 
to the graph below. 
 
  1402-025 
Figure 25  Effect of Pressure on CO
2
 Reading 
Notes for T Adjustment 
Temperature adjustment is always a simple 1-point offset correction. 
Notes for RH Adjustment 
1-point humidity adjustment affects both offset and gain, depending on 
the adjustment condition. In a dry condition (for example, 11 %RH), 
offset is adjusted more than gain. 
The 1-point humidity adjustment requires that the target condition is at 
least 50% of the currently measured value. This prevents the user from 
making excessive corrections that are very unlikely to be needed.