Pharmacopoeia Mode - Horiba Scientific LAQUA F-73A-S Instruction Manual

8.1.3 Pharmacopoeia Mode

After measurement with the standard solutions of pH7 and pH4 (or pH9), the
measurement using the standard solution of pH7 is repeated 5 times, and the result is
displayed. These check procedures conform to the regulation of the Japanese
Pharmacopoeia (JP).
Cautionary points
・ Wash the electrode with pure water before each measurement.
・ Keep the temperature gap during the measurement within 0.2C.
・ The measurement values during the periodical check are displayed according to those
when the calibration is cleared. The result values are displayed according to those in
the periodic inspection mode.
Perform measurement by the standard solutions in the following order.
(1) pH6.865
(2) pH4.008 (or pH9.180)
(3) pH6.865
(4) pH6.865
(5) pH6.865
(6) pH6.865
(7) pH6.865
・ Wash the electrode with pure water before each measurement.
・ The measured values during periodical check are based on the values when the
calibration is cleared.
When the calibration range error occurs either at step (1) and/or (2), the screen displays
the error and the check procedures automatically stop.
When the measurement and check is completed, the result data is displayed.
86
1.
Immerse the pH electrode in the standard
solution, and tap
2.
Perform measurement of each standard solution
in accordance with the content displayed on the
bottom of the screen.
to start measurement.