Edgetech RH CAL, Руководство оператора

Страница: 35 / 41

35
The desiccant pellets may be reclaimed by heating, which will cause the color to return
to blue. You may also refill the cylinder with fresh pellets. Reconnect the tubing and
reinstall the cylinder.
To reclaim the pellets:
1. Unscrew the end cover, and remove the pellets from the tube. Spread the
material in thin layers on a flat oven-proof tray. Do NOT put the clear plastic tube
directly in the oven. Do NOT use a microwave oven.
2. Bake the material for 1 to 2 hours, at 200 to 225
o
C. (390 to 435
o
F.)
3. Allow to cool and replace in the tube.
Note: Certain countries require the use of cobalt-free dryer material, which is
white rather than blue.
14.1.4 FILLING THE SATURATOR
About every 12-36 hours of operation, depending upon relative humidity settings, the
saturator should be checked. Using the Keypad, set the RH-CAL for a reading above
50% RH, if operating below this point. Remove the cap to the clear water reservoir.
Using the supplied syringe, add clean distilled water up to the level of the panel surface
(no higher). If excess water is seen, use the empty syringe to remove the excess.
Replace the reservoir cap firmly. If necessary, reprogram the RH setting as desired.
Notes:
1. The reservoir water level may be too low and it may need refilling if the
Sample Chamber RH reading is constantly lower than the programmed
value.
2. The reservoir water level may be too high and some water may have
to be removed if any water drops are seen inside the Sample Chamber.
Carefully dry the chamber and remove excess water from the mirror area
with a cotton swab.
14.1.5 REMOVING THE FRONT PANEL
Some periodic maintenance requires access under the Front Panel. To remove the
Front Panel:
Remove the 12 screws securing the Front Panel. Remove the spin-off cover from the
Sample Chamber. Remove the screw-on water fill cover, the foam cylinder around the
tube, and the rubber washer mounted above the panel. Using the two handles, lift up
the Front Panel, and then rest the rear portion on the back lip of the case. The front end
can now be propped up to allow access inside the case.