Ametek Thermox CEM O2/TM, Руководство пользователя

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7-4 | Thermox CEM O2/TM
Cell Replacement/Cleaning
To replace or clean the cell, do the following (see Figure 7-1)
1. Open the sensor cabinet door to expose sensor components.
2. Remove the cell clips.
3. Remove the sensor top cover by unscrewing the wing nut that holds
the door in place.
4. 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 through the hole in the top of the sensor enclosure. Note
that loosening the cell may require a good deal of torque.
5. If cleaning the cell, wash with water or alcohol. Dry the cell thorough-
ly before reinstalling, and always use a new cell O-ring when install-
ing the new cell.
6. 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.
7. Place the new cell O-ring on top of the cell housing as shown in Fig-
ure 7-1.
8. Insert the new cell into the cell housing. Do not touch the bare cell
when reinserting. Tighten the cell into the cell housing using the low-
er 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.
9. Place the ceramic spacer ring over the top hex nut.
10. Reinstall the cell clips. Note that the clip that goes inside the open end
of the cell must be fully seated. Also note that the bottom cell clip must
be placed on top of the ceramic spacer ring.
Before performing a primary calibration, first apply power to the sen-
sor and allow it to heat up and stabilize (approximately one hour).
11. Perform a primary calibration if you replaced the cell. (See the Primary
Calibration section in the Setup Key chapter for help.)
NOTE
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