2103 Modem Module
Section 6 Maintenance
6-3
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
oven
at 212° to 350°F (100° to 175°C) for two to three hours, or
until the blue or yellow color returns. Allow the desiccant to cool
and store it in an airtight container until ready for use.
6.4 Hydrophobic Filter
If the 2103 is in a humid location or submerged, a hydrophobic
filter prevents water from entering the desiccant cartridge and
reference line. Any amount of water will plug the filter and it
must be rinsed with clean water and allowed to dry, or replaced
so that the case can be reliably ventilated.
Remove the hydrophobic filter with a
5
/
8
" or 16mm socket. Gently
screw in the replacement filter (Isco part #209-0093-93).
If the hydrophobic filter frequently requires replacement, con-
sider relocating the modules so that they are better protected.
6.5 O-Rings
The communication connectors on the top and bottom of the 2103
Modem contain O-rings that need periodic lubrication and
replacement. The maintenance kit described in section 3.2 con-
tains O-rings and silicone lubricant.
Whenever you replace the O-rings, or have removed them from
the connectors for some reason, you should lubricate the O-rings
by applying lubricant around the circumference of the ring.
Note
Do not use petroleum-based lubricants. Petroleum-based
lubricants will cause the O-ring to swell and eventually deterio-
rate. Aerosol silicone lubricant sprays often use petroleum
based propellants. If you are using an aerosol spray, allow a
few minutes for the propellant to evaporate before proceeding.
6.6 How to Obtain Service
The internal components of the 2103 Modem are not user-ser-
viceable. The case is completely sealed to protect the internal
components. To repair the unit, the case must be broken open
and replaced. If you think your module requires repair, contact
Isco’s Technical Service Department.
Corresponding with a Teledyne Isco Technical Service Represen-
tative can often resolve the problem without the need to return
the item. If the difficulty cannot be resolved you will be issued a
Return Authorization Number (RAN) and information on
returning it to the factory.
Teledyne Isco, Inc.
Technical Service Department
P.O. Box 82531
Lincoln, NE 68501
800-228-4373 or 402-464-0231
FAX: 402-465-3001
e-mail:
[email protected]
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