14
14
Operating Instructions
(Continued)
MANUAL STALL SETTING AND MICROLITER SYRINGES
A movable collar, located on the rear guide rod of infusion only pumps, can be set to limit
travel of the pusher block. The block moves until stalled against the collar when the electro-
optical sensor detects the stall and stops the pump.
Damage to the fine wire plungers of microliter syringes caused by forcing the plunger into
the end of the syringe barrel can be prevented by careful adjustment of the collar position.
GLASS SYRINGES
In the withdrawal mode the retaining bracket on the pusher block clamps on the head of the
plunger. With some glass syringes the corners of the plunger head are rounded and this may
cause the head to ride up out of the retaining bracket.
Similarly in the infusion mode the rounded corners of the syringe barrel flange cause a
tendency for the syringe barrel to ride up out of the syringe holder.
To give a more secure, flatter surface to clamp against, an O-ring or metal collar can be
placed over the barrel and pressed against the flange.
Cole-Parmer
®
Dual & Multiple Syringe Pump
