46
Once reagents are completely ex-
hausted, the system error LED will lit
(while the relay remains activated) to
notify the user.
CHANGING PERISTALTIC PUMP TUBING
It is recommended that the peristaltic pump tubes be changed
on a regular basis depending on sampling period and oper-
ating time.
For a 5 minutes sample interval and continuous operation,
changing of the tubes every month is recommended.
For best results however, change the tubings every time the
reagents are replaced.
Important Note Rubber gloves and eye protection must be worn while han-
dling reagent tubing to prevent contact with reagent chemi-
cals. Read MSDS documents before proceeding.
Grasp the plastic collar of one pump tube and pull the fitting
away from the pump toward the front of the case until it clears
the retaining indentation.
Then move the fitting sideways away from the pump until the
tube clears the slot.
Release the tube and fitting.
The fitting on the other end of the pump tube may now be
easily removed from the pump body.
Remove the reagent tubing from one end of the pump tube
fitting and pull the pump tube from behind the pump rollers.
Replace the pump tube with a new one and reassemble in
reverse order. Repeat for the other pump tube.
