6100CR Refrigerated Sampler - Isco

6100CR Refrigerated Sampler
Section 4 Maintenance and Special Features
When the window turns pink around all three numbers, the desiccant
needs to be replaced, as humidity inside the enclosure
exceeds 40%. Replacement desiccant bags are available from
Teledyne Isco.
CAUTION
You must disassemble the control panel to access the desiccant.
Mechanical and electrical components will be exposed in
the process. Do not disturb the wiring or change the mechanical
linkages in any way or you may cause substantial damage
to the sampler.
Teledyne Isco suggests replacing both desiccants at the same
time. To replace the desiccant in the control housing do the following:
1. Disconnect the power source.
2. Note the sampler motor housing under the unit. This
enclosure houses the electronics.
3. The desiccant cartridge is located on the left side of the
sampler motor housing opposite the electrical connections.
Remove the desiccant cartridge by unscrewing the large
hex nut.
4. The cartridge can be regenerated by removing the desiccant
and replacing it with new or regenerated desiccant.
Remove the desiccant by unscrewing the plastic tube from
the hex nut. Never try to regenerate the desiccant while it
is still inside the plastic cartridge.
5. Reassemble the cartridge and the sampler in the reverse
order.
Teledyne Isco supplies two different chemicals in the cartridges.
Before regenerating them, you must identify the chemical used
with your unit. Both chemicals are blue when activated and pale
pink to amber when saturated.
• One chemical looks like irregular chips or flakes of
tinted plaster. This is anhydrous calcium sulfate and
you regenerate it by heating at 400° to 440°F
(200°-225°C)
• The other chemical looks like glassy beads or pellets.
This is silica gel, and you also regenerate it by heating,
but at a lower temperature, 212° to 350° (100° to 175°C)
MSDS (Material Safety Data Sheets) for these chemicals can be
found in Appendix B.
To replace the desiccant bag under the keypad, do the following:
1. Remove the ten screws attaching the plastic bezel to the
keypad and remove the bezel.
2. Lift the keypad assembly out of the tower housing. Do not
disconnect any of the wiring.
3. The desiccant bag is in the well beneath the keypad.
Remove and replace the bag.
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