7
Note: To prevent damage to the electrode, remove the pH elec-
trode from the solution before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
TAKING pH MEASUREMENTS
Make sure that the instrument has been calibrated for
pH before taking pH measurements.
• Put the beakers (bottles 50 or 100 mL) with the
solutions under test on the sample holders.
• Switch the instrument on by pressing the
ON/OFF
switch.
• Press the pH key to display the pH measurement.
• Immerse the electrode tip (4 cm / 1½") into the
sample and shake briefly.
• Take the temperature of the solution with a
ChecktempC
or a glass thermometer (e.g.25 °C).
• Press and hold the Temp key to display tempera-
ture setting on the LCD and adjust the temperature
knob to display the temperature of the sample.
• Release
Temp
key. The meter returns to pH range.
• The display shows the pH value of the test solution compensated
for temperature.
If measurements are taken in different samples successively, it is recom-
mended that the electrode be rinsed thoroughly for better conditioning
and to eliminate cross-contamination of the sample.
For the rinsing process, it is recommended to use a liberal amount of
the next solution to be measured.
