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OFFSET AND SLOPE DIRECT SELECTION (HI21523 ONLY)
Whenever the pH electrode offset and slope parameters are
known, it is possible to directly calibrate the meter entering
the electrode parameters.
• Press the “CAL DATA” and then “SETUP”. The LCD will
show the default offset of -5.0 mV.
• Using the
,
and
enter the electrode offset parameter
(the value must be between -100 and +100 mV).
• Confirm the value by pressing CFM.
If offset is invalid the “WRONG”
indicator will blink on the LCD.
• The LCD will then show the default
slope for Hanna Instruments elec-
trodes: 57.5 mV/pH.
Note
If CAL DATA or LCD are pressed before CFM, calibration is
aborted without changing the data of previous calibration.
• Using the
,
and
enter the electrode slope parameter
(the value must be b40 and +80 mV/pH).
• Confirm the value by pressing CFM. If slope
is invalid the “WRONG” indicator will
blink on the LCD.
Note
Press LCD or CAL DATA to exit calibration.
The slope will be set to the default value
(57.5 mV/pH).
Calibration data can be viewed pressing CAL DATA while
in normal mode but no pH buffer values will be displayed
during the data scrolling on LCD.
