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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 Modem module is submerged, a hydrophobic filter
prevents water from entering the desiccant cartridge. Any
amount of water will plug the filter and it must be replaced so
the case will be reliably ventilated.
To remove the hydrophobic filter, grasp the filter and pull it from
the desiccant cartridge collar. The filter is only held in place by
its friction fitting; rocking it back and forth while pulling may
help. Firmly press the replacement filter (Isco P/N 60-2005-003)
in place.
If the hydrophobic filter frequently requires replacement, you
should consider relocating the modules so they are better pro-
tected. Alternatively, replace the existing hydrophobic filter with
the extension accessory package included with your unit. Follow
the instructions above to remove and replace the filter. Locate
the other end of the tubing in a dry location and secure it.
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.