Teledyne 7600 - Infrared gas analyzer - operating manual - Manual (Page 86)

Operation Model 7600
Teledyne Analytical Instruments 86
3.6.5 Moisture Interference Adjustment
This item is described in Section 4.5 Moisture Interference
Adjustment.
For the values listed in the middle column of the screen, the
moisture interference for each component is already offset. The values
in the right column are the interference compensation coefficients used.
To change the coefficient:
1. Move the cursor to a desired channel by pressing the UP
or DOWN key, and then press the ENT key. The
selected interference compensation coefficient at the right
is highlighted.
2. Check that the gas for moisture interference
compensation is flowing. Change the moisture
interference compensation coefficient using the UP or
DOWN key. Adjust the value until the value in the left
column is near zero. Then press the ENT key to log
moisture interference compensation value.
Note: An interference compensation detector is not provided so if
the 1st range is beyond 0 to 10 vol %, no interference
adjustment can be performed (no need).
3.6.6 Output Adjustment Screen
In this menu you can adjust the analog output. First, connect a
digital multi meter to the output terminal corresponding to the output to
be adjusted. See the Appendix for terminal identification on the terminal
blocks. Adjust the value so that 4 mA or 0 V is output at zero and 20
mA or 1 V is output at span.