Bio-Rad Econo Gradient Pump Kits - Manual (Page 17)

3. Insert one end of the tubing into the tubing retaining bracket of
the pump head. Lightly pull the tubing around the rollers to
remove slack. Attach the other end of tubing into the tubing
retaining bracket on the opposite side of the pump head.
4. Slide the platen back into the pump head frame assembly until it
rests up against the tubing. Press the cam lever in toward the
pump head, locking the platen up against the tubing and rollers.
The platen may be inserted with the cam lever on the left or the
right.
4.3 PLATEN ADJUSTMENT
Proper adjustment of the platen pressure increases flow stability,
minimizes flow pulsation, and prolongs the life of the tubing.
Once the tubing is installed, completely loosen the platen adjustment
screw counterclockwise until the stop is reached. Use the information
in the table below to determine the appropriate number of turns that
are required.
Overtightening the platen adjustment screw will reduce flow rate and
shorten tubing life. If the platen is too loose, flow rate will decrease as
backpressure increases. The platen must be adjusted each time
pumphead tubing is replaced.
Tubing ID Number of Turns
from Fully Open
0.8 mm (1/32”) 5
1.6 mm (1/16”) 4
3.2 mm (1/8”) 3
Tubing Selection
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