Table of Contents
Advertisement
Valve Sticks
With the dispensing unit screwed on, ensure that the valves are surrounded by
liquid and that the valve system is easy to move by rinsing it with distilled water
and/or laboratory cleaning agent. As a last step, rinse with alcohol.
Piston Difficult to Move
Check whether crystals have formed, and if so, carry out intensive cleaning of the
piston and the cylinder (refer to Chapter 5 MAINTENANCE, page 11).
No Liquid Dispensed
•
Check that the nozzle switch is set to "Dispense" (0°).
•
Check the suction valve and then clean it, if necessary.
•
Check the nozzle switch. If it is not clean and operational, clean unit by
immersing nozzle set in cleaning fluid.
•
Check the discharge tube. If it is not clean and operational, disassemble it,
and then flush it with cleaning fluid.
No Liquid Aspirated
•
Check the fit of the telescopic tube into the suction valve. It should be firmly
pressed into the smaller hole of the bottom part of the valve block (please
refer to figure 6, page 8).
•
Check the volume setting.
•
Check the suction valve and then clean it, if necessary.
Air Bubbles in Aspirated Liquid
•
Check whether all air has been removed from the instrument, (See Chapter 4
OPERATION, page 9).
•
Check that the reservoir is not empty.
•
Check the telescopic tube, if necessary slide it to shorten it or replace it in its
socket.
•
Ensure slow, steady aspiration of reagent.
•
Check the suction valve and then clean it, if necessary.
Incorrect Volume Dispensed
Calibrate the instrument (See Chapter 7 CALIBRATION, page 13).
14
TROUBLESHOOTING
LT801577_D _UG DISPENSMAN.indd 14
Chapter 8
TROUBLESHOOTING
|
DISPENSMAN
®
09/11/2017 15:01:15
Advertisement
Table of Contents
