Hanna-instruments HI 84500 Manual de usuario descargar pdf (Pagina 17)

DOSING PUMP INSTALLATION

To install the dosing pump follow the procedure below:

• Extend the plunger on the 5 mL syringe to its maximum volume.

• Place the syringe in the dedicated spot on the top of the meter (1).

• Arrange the bottom of the syringe into the holder on the pump (2). Once the syringe is in place

lower the barrel until it sits flush on the holder.

• Put the o-ring and syringe-fixing nut over the syringe (3) and turn clockwise to secure it in place (4).

• Place the valve on the top of the syringe (5). Ensure it fits securely.

• Insert the aspiration tube into the left side of the valve (6) and replace the titrant bottle cap with

the attached cap (7).

• Insert the dispensing tube into the top of the valve (8).

DOSING PUMP PRIME PROCEDURE

Prime cycle should be performed:

• if you notice there is no titrant in the tip

• whenever the dosing system tubes are replaced

• whenever a new bottle of titrant is used

• before starting a pump calibration

• before starting a series of titrations

The prime cycle is used to fill the syringe before starting a set of titrations.

Two rinse cycles of the syringe are shown in the figure below. The dispensing tube is connected to

the top of the valve and the aspiration tube on the left side.

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Hanna-instruments HI 84500 Manual de usuario Pagina 17