Bio-Rad Model 2110 Fraction Collector - Manual (Page 23)

Section 9
Cleaning and Maintenance
The Model 2110 Fraction Collector requires very little maintenance to
insure reliable operation. Two procedures are outlined below.
9.1 Drop Sensor
The Model 2110 Fraction Collector counts drops through an optical
sensor located in the drop area inside the drop former arm. Precipitates or
other foreign debris may obscure the optical path and cause erroneous
drop counts. To prevent this problem, the drop sensor should be cleaned
periodically. An ordinary cotton swab moistened with water can be used
to clean the sensor.
9.2 Instrument Case, Carousel, and Drainage Tube
During normal operation, spills and splashes may result in precipi-
tates forming on the case and carousel. Use a squirt bottle and soapy water
to wash down carousel and case. The water will drain out the back of the
unit through the drainage tube. Prior to squirting the instrument case,
make sure the rubber seal around the gear device is in place. Insure that
the waste tube is draining properly to avoid instrument damage.
Section 10
Troubleshooting
Problem Cause Remedy
Drops miss tubes Carousel misaligned Reposition carousel
Drop former missing Replace drop former
Drop head misaligned Align
Unit not level Place unit on level surface
Drops miss tube Flow rate greater Reduce flow rate
during advance than 5 ml/min
Drops not counted Drop sensor is dirty Clean drop sensor
or E08 error code
Flow rate greater than Use Time collection mode
5 ml/min
Operating in a windy
Try relocating unit, or put
environment a piece of tape over slot in
drop arm
No power Fuses Check fuses, replace if
necessary
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