Gilson 402 - Manual (Page 88)

6-4
Maintenance
6
Cleaning
Cleaning the Syringe Assembly
You must dismount the syringe and piston assembly
from the instrument and then separate the syringe and
piston assembly before cleaning or autoclaving them.
1) Dismount the Syringe assembly from the instrument.
2) Undo the piston securing screw to free the
piston assembly from the piston operating rod.
3) Lower the piston operating rod; for Gilson soft-ware
there is a change syringe program that lowers the
piston operating rod - use this software option to
lower the piston operating rod away from the
syringe piston. Refer to your software User’s
Guide for the precise sequence. This allows you to
dismount and mount the syringe and valve/Tee
assembly without the risk of damaging the syringe.
4) Undo the syringe from the body of the valve or Tee.
5) Remove the piston and syringe assembly from
the pump.
6) Pull the piston out of the syringe body. For large
syringes; 5, 10 and 25 mL syringes, you must
screw the piston securing screw back into the
bottom of the piston and pull on the screw to
remove the piston from the syringe barrel.
7) Clean or autoclave the two parts (except the 25 mL
syringe).
8) Ensure that the syringe and piston assembly
have cooled to room temperature before reas-
sembling the syringe and piston. Ensure that the
piston and the piston nose are free from dust or
contamination before introducing the piston into
the syringe. Wet the piston nose (water will
suffice) before inserting the piston in the syringe.
Insert the piston nose in the syringe body and
push the piston into the syringe.
9) Remount the syringe assembly on the valve or Tee.
Screw the threaded end of the syringe body into
the valve or Tee.
10) Lower the piston so that it comes into contact
with the piston holding screw.
11)Tighten the piston holding screw so that the
piston assembly is secured against the piston
operating rod.
The 25 mL syringe is not
autoclavable, all of the other
size syringes are autoclavable.