Priming - VITLAB Dispenser TA2 Mode D'emploi

6. Priming

Warning!
Wear protective clothing, eye protection and gloves! Never press
down the piston when the screw cap is screwed on! Avoid splash-
ing the reagent! Liquid may accumulate in the screw cap. To avoid
splashes dispense slowly. Follow all safety instructions and observe
limitations of use and operating limitations (page 28-29).
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 42).
6.1 Instruments with 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 at least
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).
6.2 Instruments without recirculation valve:
1. Open the screw cap of the discharge tube (see 'Instrument with
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).
34
1
!
2
3
30 mm
4
5
6