LI-COR LI7200RS, Instruction Manual

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under part number 7200-950. If you want to recharge the bottles yourself, see Sup-
pliers on page C-1, for a list of suppliers of Ascarite II and magnesium perchlorate.
NOTE: Calibration shifts will occur if CO
2
or H
2
O are not kept out of the ana-
lyzer housings.
To change the sensor head soda lime and desiccant bottles:
1
Remove the chemical bottles.
The plastic bottles are in the lower analyzer housing in the sensor head. Remove
the mounting bracket from the analyzer. Then remove the thumbscrew and thread
it into a cap. Pull straight out to remove the plug.
Figure 5-2. Remove the thumbscrew, thread it into the bottle covers, and then pull straight
out to access the scrubbing bottles.
2
Fill the bottles half full with Ascarite II first, followed by the mag-
nesium perchlorate.
3
Place the Teflon membrane in the lid to keep the chemicals from
spilling into the detector housing.
4 Insert the recharged bottles into the analyzer housing cap first.
Replace the bottle covers.
Section 5. Maintenance
5-5 Replacing the Internal Chemicals