Agilent 1100 Series Fraction Collectors User’s Guide 63
Repairing the Fraction Collector 3
Simple Repairs
Replacing the Valve to Needle Tubing
Frequency When contaminated, worn out or visibly damaged
Typically once every year
Tools requi re d Wrench, open end, 4mm, PN 8710-1534 (supplied in accessory kit)
Wrench, open end, 1/4 – 5/16 inch, PN 8710-0510 (supplied in accessory kit)
Parts Required Valve to needle tubing assembly included in tubing kit preparative scale 0.8
mm ID, PN G1364-68711 or valve to needle tubing assembly included in
tubing kit analytical scale 0.25 mm ID, PN G1364-68712
WARNING
To avoid personal injury, keep fingers away from the needle area during fraction
collector operation.
WARNING
Follow the described installation procedure exactly to maximize the lifetime of the
valve to needle tubing and to avoid potential spills or fraction losses. Regularly
inspect the tubings and exchange them if they are worn out or show visible signs of
damage.
Before beginning this procedure:
• Position the transport unit of the fraction
collector in the “Home Position” (see
“Maintenance Functions” on page 49).
• Remove all installed trays from the tray
base.
• Position the transport unit of the fraction
collector in the “Change Parts Position”
(see “Maintenance Functions” on page 49)
and turn off the instrument.
• It might be more convenient to remove the
needle from its carrier before unscrewing
the needle tubing.
1 Locate the diverter valve with the
finger-tight fittings of the valve to needle
tubing assembly (the figure shows the open
fraction collector seen from the front).
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