Teledyne Foxy R1, Instruction Manual

Page: 81 / 102

Foxy
®
R1 and Foxy
®
R2 Fraction Collectors
Section 5 Maintenance
5-3
If problems occur frequently, consider pumping a cleaning fluid
through the path as final step in each collection routine.
5.2.5 Drop Counter Cleaning The drop counter is a photosensor device at the outlet of the
standard flow rate diverter valve. This device uses a glass sleeve
to protect the electronic components. If the performance of the
drop counter degrades, the glass sleeve should be cleaned.
To clean the glass sleeve:
1. Place the fraction collector in Standby and remove the AC
mains power cord.
2. Remove the collection racks.
3. Carefully unscrew the black retaining ring located under
the diverter valve. The glass sleeve rests inside the retain-
ing ring.
Figure 5-1 Retaining ring for the drop counter’s glass
sleeve
4. Clean the glass sleeve with a mixture of distilled water and
a mild detergent. Use isopropyl alcohol for tougher stains.
Alternatively, the tube can be placed in an ultrasonic bath.
CAUTION
Use care to avoid scratching or otherwise damaging the glass
tube.
5. Place the cleaned glass sleeve back into the retaining ring
and thread the ring back into the diverter valve.
6. Replace the collection racks, connect the AC mains power
cord, and return the fraction collector to operation.
CAUTION
Operating the fraction collector without the glass sleeve may
damage electronic components inside the diver ter valve
assembly. Never operate the fraction collector without the
glass sleeve.
Retaining ring
Glass sleeve