Teledyne 2101 Desiccant, Field Wizard Maintenance, Replacing the, Reactivating the, Silica gel

2101 Field Wizard Section 5 Maintenance

5.3 Desiccant

The Field Wizard uses desiccant to protect the internal compo- nents from moisture damage. The cartridge is filled with indi- cating silica gel that is blue or yellow when dry. As the desiccant becomes saturated, the color changes from blue to pink, or from yellow to green. Replace the desiccant before the entire length of the cartridge turns pink or green.

5.3.1 Replacing the	The desiccant is contained in a cartridge located on the left side
Desiccant: 2101	of the Field Wizard. To remove the cartridge, unscrew the collar
	and slide the cartridge out of the Field Wizard. The clear tube
	reveals the silica gel desiccant inside.
Collar	To replace the silica gel desiccant:

	1.	Hold the cartridge upright with the collar at the top.
	2.	As shown in the margin, push the collar off the cartridge.
	3.	Empty the saturated silica gel beads or granules.
	4.	Fill the tube with new (Isco P/N 099-0011-03) or reacti-
		vated (see section 4.3.2) silica gel desiccant.
	5.	Press the collar onto the tube.
	6.	Slide the cartridge into the Field Wizard. Tighten the col-
		lar to seal the cartridge in place.
Cartridge
5.3.2 Reactivating the	Silica gel beads and granules of desiccant can be reactivated.
Desiccant		CAUTION
	Desiccant may produce irritating fumes when heated. Observe
	the following precautions:
	•	Use a vented oven in a well-ventilated room.
	•	Do not remain in the room while the regeneration is taking
		place.
	•	Use the recommended temperature. Avoid heating the
		desiccant at higher than recommended temperatures.
	There have been reports of irritating fumes coming from the des-
	iccant during reactivation. While our attempts to duplicate the
	problem have been unsuccessful, we still urge you to use caution.
	Material Safety Data Sheets are in the back of this manual.
	The desiccant’s ability to remove moisture may lessen with each
	saturation/reactivation cycle, resulting in a need for more fre-
	quent service. After several cycles, the desiccant may no longer
	be effective as it saturates too quickly. At this point, replace the
	desiccant.
Silica gel	To reactivate the silica gel desiccant, pour the spent desiccant
	into a heat resistant container. Never heat the cartridge
	assembly; it will melt. Heat the silica gel in a vented convection

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