Hanna Instruments HI 4521 - Manual (Page 35)

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Confirmation is enabled, press to accept the modified option, to escape without saving
or to return to the editing mode. Otherwise, the modified option is saved automatically.
Isopotential Point
This option allows the user to edit the isopotential point of the electrode used for pH measurements. The isopotential point
is the mV reading for an electrode at which temperature has no effect on the measurement. The ideal electrode has an
isopotential point of 0.0 mV and 7.00 pH, while an actual electrode tipically deviates slightly from the ideal values.
If the actual isopotential pH for an electrode is known, it can be set by accessing this option. The isopotential pH
limits (low and high) will be displayed on the LCD.
Note: If the isopotential point has been modified, recalibration must be performed for the pH channel.
To set the Isopotential Point:
• Use or to select the Isopotential Point option.
• Press and set the desired isopotential pH value using
or .
• Press to save the current value or press to
cancel operation.
pH Resolution
Accessing this option, the desired pH resolution can be set, with one (x.x), two (x.xx) or three (x.xxx) decimals.
To set the pH Resolution:
• Use or to select the pH Resolution option.
• Press and use or to highlight the
desired option.
• Press to confirm your selection or press to
cancel operation.
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TDS factor
With this option the user can set the TDS factor.
• Use or to highlight the TDS options .
• Press to confirm your selection and use or
to increase / decrease the value.
• Press to confirm your selection or press to
cancel operation.
Sample ID - see Conductivity Setup section.
Log - see Conductivity Setup section.
Alarm - see Conductivity Setup section.