Priming - BRAND Dispensette TA Operating Manual

Priming

Warning:
Never press down the piston when the screw cap is screwed on!
Avoid splashing the reagent! The reagent can drip out from the dis-
charge tube and screw cap.
Note:
Before using the instrument for the first time, ensure it is rinsed
carefully and discard the first few samples dispensed. Avoid splashes.
Depending on application requirements, cleaning for trace analysis
should be carried out (page 36).
Instruments with SafetyPrime™ recirculation valve:
1.
Open the screw cap of the dispensing tube (Fig. 1). For safety,
hold the discharge tube orifice on the inner wall of a suitable
receiving vessel.
2
. Set valve to 'Recirculate' (Fig. 2).
3
. For priming gently pull up the piston approx. 30 mm and push it
down rapidly until the lower stop. Repeat this procedure 5 times
(Fig. 3).
4.
Turn valve to 'Dispense' (Fig. 4).
5.
To avoid splashes when priming hold the discharge tube on the
inner wall of a suitable receiving vessel and dispense liquid to
prime the discharge tube until it is bubble-free. Wipe away any
remaining drops from the discharge tube. (Fig. 5).
Instruments without SafetyPrime™ recirculation valve:
1.
Open the screw cap of the discharge tube (see instrument with
SafetyPrime™ recirculation valve Fig. 1).
To avoid splashes, hold discharge tube orifice on the inner wall of
a suitable receiving vessel.
2.
For priming pull up the piston approx. 30 mm and push it down
rapidly until the lower stop.
Repeat this procedure approximately 5 times until the discharge
tube is bubble-free (Fig. 6).
30
1
!
2
3
30 mm
4
5
6