BrandTech Scientific Dispensette III - Manual (Page 48)

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48
Cleaning
Cleaning
The cylinder, valves, telescoping filling tube and discharge tube contain reagent! Never
remove the discharge tube or the SafetyPrime
™ recirculation valve while the dispensing
cylinder is filled. Point the valves and tube openings away from your body. Wear protective
clothing, eye protection and appropriate hand protection.
Warning!
■ immediately when the piston
is difficult to move
■ before changing the reagent
■ prior to long term storage
■ prior to dismantling the instrument
■ prior to autoclaving
The instrument must be cleaned in the following situations to assure correct operation:
■ prior to changing the valve
■ regularly when using liquids which form
deposits (e.g., crystallizing liquids)
■ regularly when liquids accumulate in the
screw cap
Note:
Never exchange pistons between instruments!
1.
Screw the instrument onto an empty bottle and empty it com-
pletely by dispensing (Fig. 1).If the instrument is equipped with
SafetyPrime
™ recirculation valve, it must be emptied in the
"dispensing" and “recirculating” setting.
2.
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.
If the instrument is equipped with a SafetyPrime ™ recirculation
valve, after rinsing the instrument, it must also be rinsed in the
“recirculating” setting (Fig. 3).
4.
Pull out the recirculation tube and the telescoping filling tube.
For proper cleaning and removal of any deposits, the piston must
always be completely pulled out of the cylinder after rinsing.