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When an edge® pH probe is connected, the instrument
will recognize it and a the cap removal message will be
displayed along with “PH”. Press any key to skip the
message. The instrument will enter measurement
mode. Make sure the electrode has been calibrated
before taking measurements.
Rinse the pH sensor with water and a sample if
possible. Submerse the electrode tip approximately 3 cm
(1¼”) into the sample to be tested and stir sample
gently. Allow time for the electrode to stabilize.
The pH is displayed on the rst LCD line and the temperature on the second LCD
line. Using the ARROWS, date, time, battery status and oset with slope can be
displayed on the third LCD line. If the reading is out of measurement range, the
closest full scale value will be displayed blinking on the rst LCD line.
If measurements are taken successively in dierent samples, it is recommended
to rinse the electrode thoroughly with deionized water or tap water and then
with some of the next sample to prevent cross-contamination. The pH reading is
aected by temperature. The temperature eect is compensated for using the
temperature sensor inside the probe. The resulting measurement is the actual
pH at the temperature of measurement.
Error Messages During Measurement
If the pH or temperature exceeds the limits of the
sensor, the message “ELECTRODE OUT OF SPEC”
will scroll on the third LCD line. The temperature will
continue to be displayed. If temperature exceeds
the meter specication of 120 ºC, then “120 ºC” will
blink on the display. If interval logging, the message
“OUT OF SPEC.” will alternate with the LOG specic
message. In both these cases the Log le will indicate
a “ºC!” next to the data.
In case the temperature sensor is damaged, “BROKEN
TEMPERATURE SENSOR” message will be displayed
with “25.0 ºC” blinking on the second LCD line. The Log
le will indicate “ºC!!” next to the data.
mV Reading Of The pH
The mV reading of the measured pH can be displayed
on the LCD by pressing the RANGE key.
pH
Measurement
w ww . . co m
information@itm.com1.800.561.8187
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