Place of Origin : Guangzhou,China

CALIBRATION
• Immerse the tester up to the maximum immersion level in pH 6.86 buffer solution
• Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 6.9.
Calibration is now complete.
ALWAYS USE FRESH BUFFERS FOR CALIBRATION.
BATTERY REPLACEMENT
When the meter cannot be switched on or the display fades, pull out the battery compartment and replace all three 1.5V batteries, while paying attention to their polarity. Batteries should only be r