Horiba Scientific 6560S-10C Instruction Manual page 39

16
Perform the second calibration.
Wait for a stable reading and perform the second calibration as described
in the Meter Instruction Manual.
When the second calibration is finished, the slope (%) of the electrode is
displayed.
17
Check the slope (%) on the meter.
For details on how to check the slope (%), refer to the Meter Instruction
Manual.
Check that slope is at least 80%.
If the slope is less than 80%, the measurement may not be
performed accurately.
The possible causes of calibration failure are:
 Dirt on the ion selective membrane or liquid junction
 Change in the internal solution concentration
 Change in composition and concentration of the
Note Note
standard solution
Refer to "When accurate measurement is not possible"
(
calibration again.
18
When the second calibration is finished, take out the
electrode from the solution for calibration.
19
Close the rubber stopper of the
internal solution fill port.
page 50) to resolve the cause and perform the
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