Bio-Rad Model 2110 Fraction Collector User Manual
Page 22
External Start
The external start line is used to allow another instrument to remote-
ly start and stop the fraction collector’s programmed functions. Applying
a low pulse of at least 100 msec to pin 6 has the same effect as pressing
the Run/Stop key on the front panel. That is, the first pulse will start the
previously selected mode (drops or time) and the second pulse will stop
the program.
Advanced Relay Contacts
Pins 7 and 8 provide a normally open set of contacts that are momen-
tarily closed each time the carousel is advanced. This signal is a conve-
nient way to interface with equipment that does not support TTL level sig-
nals. The maximum current and voltage which can be put across these
pins is 24 V DC and .25 A.
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8.1 Instrument Dust Cover
The dust cover (catalog number 731-8136) is intended for use only
when the drop arm is in the collect (forward) position. The inlet tube may
be directed out the top opening or through the small opening at the bot-
tom/rear of the instrument.
8.2 Micro Tube Adaptor
The micro tube adaptor is intended to convert a carousel for use with
1.5 ml micro test tubes (catalog number 223-9500).
Align the step in the outline of the adaptor with the step of the outline
of the carousel. Position the adaptor so that its four legs fit into the four
openings in the inner wall of the carousel. Push the adaptor downward
until it is fully seated on the carousel.
Operation with micro tubes is identical to operation with standard test
tubes. To prevent splashing, collect no more than 1 ml of eluant in each
micro tube.
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