Hanna Instruments HI 9124 - Manual (Page 8)

8
The LCD will show the pH measurement and the temperature of the
sample.
If several measurements are taken successively in different samples,
rinse the electrode thoroughly with deionized or tap water and a
small amount of the sample to be measured.
The pH value of the sample is directly affected by temperature. In
order for the meter to measure the pH accurately, the value must be
compensated for temperature. If the sample temperature is different
from the temperature at which the pH electrode was kept, allow a
few minutes for thermal equilibrium.
To use the meter's Automatic Temperature Compensation feature,
submerse the temperature probe into the sample as close to the
electrode as possible and wait for a few minutes.
If manual temperature compensation is desired the temperature
probe must be disconnected from the instrument
.
The display will show the default temperature of “25 °C”, or the last
temperature set with the “°C” (or “°F”) indicator blinking.
The temperature can now be adjusted with the ARROW keys. Set the
value at the sample temperature.
Notes : • When the reading is out of
range, the display will flash
the closest full-scale value.
• If using pH electrode while
in mV mode, the meter will
measure the mV generated
by the pH electrode.