Cleaning; Cleaning, Analog-Adjustable Model, Fixed-Volume Model - BRAND Dispensette S Operating Manual

9 Cleaning

9 Cleaning
Components filled with reagent
The cylinder, valves, telescopic filling tube and discharge tube contain reagent!
> Never remove the discharge tube while the dispensing cylinder is filled.
> Point the valves and tube openings away from your body.
> Wear protective clothing, eye protection and protective gloves!
The instrument must be cleaned in the following situations to assure correct operation:
•
immediately if the piston becomes stiff
•
prior to a reagent change
•
prior to long term storage
•
prior to dismantling the instrument
•
before autoclaving
•
before valve replacement
For the proper cleaning and removal of any deposits in the parts through which liquid flows, the pis-
ton must always be completely removed from the cylinder after rinsing with a suitable cleaning solu-
tion. If necessary, the parts can also be cleaned in an ultrasonic bath.
9.1 Cleaning, Analog-adjustable model, Fixed-volume
model
1. Completely emptying the instrument
a.
Screw the instrument onto an empty bottle and empty it completely by dispensing. If the instru-
ment is equipped with a recirculation valve, it must be emptied in both the 'dispense' and 'recir-
culate' settings.
2. Rinsing the instrument
a.
Screw the instrument onto a bottle filled with a suitable cleaning agent (e.g. deionized water)
and rinse the instrument several times by completely filling and emptying it.
3. Removing pistons
Avoid swapping pistons
The pistons and cylinders are individually matched, and should not be swapped with pistons from
other instruments!
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Operating manual
WARNING
•
regularly when using liquids which form de-
posits (e.g., crystallizing liquids)
•
regularly if liquids accumulate in the screw
cap
•
regularly if using hygroscopic media (e.g.,
concentrated sulphuric acid)
NOTICE
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