Hanna Instruments HI 84430, Instruction Manual

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• Press CAL to access the titration calibration menu where electrode and pump calibration may be accessed.
• Press HELP to view the contextual help.
• Press Continue or ESC to skip the message and enter titrator main screen.
• Press Purge to begin a purge cycle.
The purging stops automatically after 5 minutes.
To stop purging at any time and return to the main screen press ESC or Stop .
During a purge, a countdown timer displays remaining time in 5 minute purge.
• Press Pause to interrupt the purge process.
• Press Pause or Stop (by pressing the corresponding function key in the purge screen)
• after the first drops of fresh titrant appear at the dosing tip
• in case an error condition is observed (empty titrant bottle, tubes or dosing tip
disconnected, pump error)
• if you want to resume at a later time
If Pause is pressed the next screen is displayed:
Press Resume to continue purging.
PURGE
Purging should be performed:
• whenever the tube of the peristaltic pump is replaced;
• whenever the titrant is changed or a new bottle of titrant is used;
• before starting a pump calibration;
• before starting a lot of titrations.
In order to start purging press the Purge key from the titrator main screen. The purging stops
automatically after 5 minutes.
To access the Purge key follow the next steps.
• From the instrument main screen (pH meter screen) press “Titrator” function key.
The instrument will display the next screen if tutorial is enabled and if any of the following
conditions exist:
- the meter hasn’t been calibrated in 8.30 pH buffer
- the pH calibration has expired
- a pump calibration hasn’t been performed or more than 3 days have passed since the last
pump calibration
PUMP TUBE INSTALLATION
To mount the new peristaltic pump tube set follow next steps:
• Position one peristaltic pump fixing ring on its location.
• Stretch the tube over the peristaltic pump rolls.
• Attach the second pump fixing ring on its location.
• Attach the tube to the reagent bottle. Choose which titrant
is required for expected range. See table in Acidity
Type section.
Note : Purge the peristaltic pump until drops of reagent appears on the dosing tip by pressing the
PURGE key from the titrator main screen.
To remove the tube of the peristaltic pump follow next steps:
Caution : Purge line with water to remove titrant solution from tube.
• Detach the tubes system from the reagent bottle.
• Grasp one fixing ring of the peristaltic pump tube.
• Pull the tube until the fixing rings are taken out from their location.
• Remove the other side of the tube.