Hanna Instruments HI 4521 - Manual (Page 46)

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• Unrecognized buffer. Please check the buffer or the buffer list (for Semiautomatic and Automatic buffer entry
type): this message appears if the current buffer value is not close to any of the buffers from the buffer list/group.
Check if the current buffer is present in the buffer list or the appropriate buffer group was selected.
• The current buffer was already calibrated. Press to recalibrate in this point, or change
the buffer: this message appears when calibration is performed in one of the previous calibrated buffers.
Follow displayed instructions.
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Compensation Coefficient (only for Linear temperature compensation)
To set the compensation coefficient:
• Use or to highlight the Compensation
Coefficient option.
• Press and set the desired compensation coefficient
using or to increase/decrease the value.
• Press to save the current value or press to
cancel operation.
Calibration
Cell Constant
The conductivity probe can be calibrated using the conductivity standards or by entering the cell constant of the
probe by the user.
Using standard solutions: Using standard solutions: Using standard solutions: Using standard solutions: Using standard solutions:
The meter can be calibrated in a single or multi-points (up to four points), using 6 Hanna standards (84
µS , 1413
µS , 5.0 mS ,12.88 mS , 80.0 mS , 111.8 mS) or using the custom standards.
The following options are available for calibration:
Standard Recognition
The user can choose between
Automatic recognition (from 6 Hanna
standards available) or User Standard (when custom standards are
used for calibration).
• Use or to highlight the Standard Recogni-
tion option.
• Use or to choose from Automatic or User
Standard option.
• Press to confirm your selection or press to
cancel operation.