Hanna Instruments HI 4521 - Manual (Page 58)

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results will be displayed on the LCD.
• Press to log the current results into a ISE Method
Report or press to return to ISE Measure mode.
• If pressing , the method parameters can be changed
and the sample concentration will be recalculated.
• Press to start another measurement.
Note: Press at any time to stop the measurement and
return to ISE Measure mode.
ANALYTE ADDITION
To measure the concentration of a sample using the Analyte
Addition incremental method:
• Press and then to select ISE Measure mode.
• Select the Analyte Addition method (see ISE Setup for details).
• Press to start the measurement. The first step of the method will be displayed on the LCD in
which the user is notified to add the appropriate ISA Buffer Volume (if different from 0 mL) to the standard
and to immerse the electrode into the Standard Volume of set concentration. The method parameters are
also displayed on the LCD.
• Press to set the method parameters. Press / to select next / previous parameter
to be edit, then press and use or to set the desired parameter value. Press
to save the modified value and then press to exit method parameters edit menu.
• Make sure that the set parameters values are the used ones and submerge the Ion Selective Electrode tip
approximately 4 cm (1½”) into the standard solution.
• Press to take the first mV reading.
• When the reading is stable, press to store the first mV reading. The second step of the method
will be displayed on the LCD in which the user is notified to add the Sample Volume to the standard
solution. The method parameters are also displayed on the LCD.
• Press to change the desired method parameters as indicated in the first step of the method.
• Press to take the second mV reading.
• When the reading is stable, press to store the second mV reading. The ISE measurement
results will be displayed on the LCD.
• Press to log the current results into a ISE Method Report or press to return to ISE Measure mode.
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• If pressing , the method parameters can be changed and the sample concentration will be recalculated.
• Press to start another measurement.
Note: Press at any time to stop the measurement and return to ISE Measure mode.
ANALYTE SUBTRACTION
To measure the concentration of a sample using the Analyte Subtraction incremental method:
• Press and then to select ISE Measure mode.
• Select the Analyte Subtraction method (see ISE Setup for details).
• Press to start the measurement. The first step of the method will be displayed on the LCD in
which the user is notified to add the appropriate ISA Buffer Volume (if different from 0 mL) to the standard
and to immerse the electrode into the Standard Volume of set concentration. The method parameters are
also displayed on the LCD.
• Press to set the method parameters. Press / to select next/previous parameter
to be edit, then press and use or to set the desired parameter value. Press
to save the modified value and then press to exit method parameters edit menu.
Note: For the Analyte Subtraction method, the stoichiometric ratio (factor) between standard and sample
must also be set in order to take accurate measurements.
• Make sure that the set parameters values are the used ones and submerge the Ion Selective Electrode tip
approximately 4 cm (1½”) into the standard solution.
• Press to take the first mV reading.
• When the reading is stable, press to store the first mV reading. The second step of the method
will be displayed on the LCD in which the user is notified to add the Sample Volume to the standard
solution. The method parameters are also displayed on the LCD.
• Press to change the desired method parameters as indicated in the first step of the method.
• Press to take the second mV reading.
• When the reading is stable, press to store the second mV reading. The ISE measurement
results will be displayed on the LCD.
• Press to log the current results into a ISE Method Report or press to return to ISE Measure mode.
• If pressing , the method parameters can be changed and the sample concentration will be recalculated.
• Press to start another measurement.
Note: Press at any time to stop the measurement and return to ISE Measure mode.