The directions below explain how to use a Hach Pocket Pal pH meter.

1. Remove the black plastic, protective cap from the end of the pH meter.
2. Slide the ON/OFF switch (black button on top of the meter) to ON.
3. Insert the end of the pH meter into the sample to be tested. Hold the meter straight up and down. DO NOT put the meter more than 1 inch deep into the sample.
4. Using the Pocket Pal meter, gently stir the sample for several seconds.
5. After stirring, wait for the digital display to stabilize.
6. Read and record the pH value displayed.
7. Rinse the bottom of the meter. Replace the black protective cap. SLIDE THE ON/OFF SWITCH TO OFF. Return the meter to where it was found.

Notes:

A. Place several drops of water in the protective cap to prevent the glass bulb from drying out.

B. Large differences in pH readings may be caused by a dry electrode or weak batteries.

C. Temperature changes and vibrations may require the recalibration of the pH Pocket Pal. Calibrate the Pocket Pal by using a prepared pH 7.0 buffer solution. Adjust the digital display through the hole in the back by using a small screwdriver to a 7.0 reading.