Ametek CEM/Humox, User Manual

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7-4 | Thermox CEM/Humox Analyzer
Cell Replacement/Cleaning
To replace or clean the cell, do the following (see Figure 7-1):
1. Remove the sensor cover to expose sensor components.
2. Remove the cell clips.
3. Loosen the lower hex nut (not the top hex nut) while holding the top of the cell
housing with a backup wrench, then remove the entire cell assembly. Note that
loosening the cell may require a good deal of torque.
4. If cleaning the cell, wash with water or alcohol. Dry the cell thoroughly before
reinstalling and always use a new cell O-ring.
5. If replacing the cell, discard the old cell and cell O-ring and retrieve the new
cell with supplied cell O-ring. Avoid touching the bare cell; instead hold the
cell by one of its hex nuts.
5. Place the cell O-ring on top of the cell housing as shown in Figure 7-1.
6. Insert the new cell into the cell housing. Do not touch the bare cell when rein-
serting. Tighten the cell into the cell housing using the lower hex nut (the upper
hex nut is pre-tightened at the factory). The cell O-ring provides a seal for the
system. Make sure it is evenly crushed when tightening the cell.
Before performing a primary calibration, first apply power to the sensor
and allow it to heat up and stabilize (approximately one hour).
7. Perform a primary calibration if you replaced the cell. (See the “Primary Cali-
bration” in the Setup Key section for help.)
NOTE
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