الوصف

CALIBRATION
·Immerse the tester up to the maximum immersion level in pH 6.*6 buffer solution.
·Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 6.*6
·Immerse the electrode in PH4.*1 or PH9.*8 the standard buffer solution of borax. Until the display shows＂3.***4.*6PH＂or＂9.***9.*3PH＂. Always use fresh buffers for calibration.
 Important  The instrument must be re-calibrated whenever.
·The electrode or battery has been  replaced.
·Approximately one mouth has passed from the last calibration.
·The electrode has been used in particularly taxing conditions.
·The utmost accuracy is required.