Titrator startup – Hanna Instruments HI 84430 User Manual

Page 6

PERISTALTIC PUMP
Peristaltic pumps are self priming. Liquid never contacts the pump components. The titrant tubing
is pressed along the rotating rollers of the pump. The rollers compress the tubing, driving the
titrant to the dispensing tip.

TITRATOR STARTUP

This is a general outline of the steps required to make a titration. The following sections expand
upon each section.
• Place the instrument on a flat table. Do not place the instrument in direct sun light.
• Connect the power adapter to the instrument.
• Turn the instrument ON using the power switch from the rear panel of the instrument.
• Set up the instrument. See the “Setup Configuration Menu” section for details. Pay attention

to the Acidity Type.

• Connect the pH electrode and the temperature probe to the instrument.
• Calibrate the pH electrode. At least a single point calibration is necessary for titration.
• Place the peristaltic pump tube on the pump (inlet tube is connected with the reagent bottle,

outlet tube is connected with the dosing tip). See the “Pump Tube Replacement” section for
the procedure.

• Remove the reagent bottle cap and replace the bottle cap with the tubes. Place the reagent

bottle in the appropriate place on the titrator top.

• Purge the titrant.
• Calibrate the pump.
• Prepare the sample.
• Run a titration and log sample results.

5. Functional key area
6. Indicates that the displayed value can be changed using ARROW keys
7. Temperature value (

°C, °F

)

8. pH temperature compensation mode (Manual or Automatic)
9. Stirrer and reading status area

ESC

- used to leave the current screen and to return either to the previous screen or to the

main screen. When pressed while modifying a parameter within the SETUP menu,

exits parameter without changing it.

- used to modify the parameters’ values, to scroll the information displayed while

viewing a help or to move between the options from the instrument’s SETUP

HELP

- used to access/leave the instrument’s contextual help

- used to enter SETUP, Recall or GLP selection menu, while instrument is in pH or

Titration main screen

STIR

- used to start/stop the stirrer.

Note: The stirer starts automatically during pump calibration and titration and cannot be
stopped by pressing STIR key.

1. Current time and instrument mode information (pH meter or Titrator)
2. pH electrode condition information
3. Main reading information
4. Instrument status information

GUIDE TO INDICATORS
During the instrument’s operation a set of information is displayed on the LCD.
Displayed icons:

Unstable reading.
Stirrer on.

Pump running.
Parameter can be changed.

2
3
4

KEYPAD FUNCTION AND INDICATORS