HOW TO SELECT YOUR LANGUAGE
To change the language, press from the main screen. Highlight the Language option. Using the and keys, select
the language and press .
Restart the titrator in order to apply the new language setting.
HOW TO USE THE CONTEXTUAL HELP
Information about the titrator can be easily accessed by pressing . The contextual help can be accessed at any time and it
provides useful information about the current screen.
METHODS
The HI931 titrator can store up to 100 methods (standard and user).
Standard Methods
Each titrator is supplied with a package of standard methods. Standard method packs are developed at Hanna Instruments to meet
analysis requirements of specific industries (e.g., water treatment, wine, dairy, etc.).
User-Defined Methods
User defined methods allow the user to create and save their own methods. Each new method is based on an existing method which
is altered to suit a specific application.
HOW TO CALIBRATE A pH ELECTRODE
To enter pH calibration mode, press , then , then .
PREPARATION
Pour small quantities pH 4.01, pH 7.01 and pH 10.01 buffer solutions into clean beakers. If possible, use plastic beakers to
minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two beakers for each buffer solution: one for rinsing the electrode
and one for calibration.
CALIBRATION PROCEDURE
• If the instrument has been previously calibrated and calibration was not cleared, the old calibration can be cleared by pressing .
Note: It is very important to clear calibration history when a new electrode is used. Most errors and warning messages that appear
during calibration depend on calibration history.
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