Operational Guide
35
When an ORP electrode is connected, the instrument
will recognize it and the probe code will be displayed
along with “ORP”. Press any key to skip the message.
The instrument will enter measurement mode.
Rinse the 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 Relative mV value is displayed on the fi rst LCD
line and the temperature on the second LCD line.
Using the ARROWS, date, time, battery status and
off set 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 fi rst LCD
line.
Error Messages During Measurement
If the mV 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 specifi cation of 120º C, then “120º C” will
blink on the display. If interval logging, the message
“OUT OF SPEC.” will alternate with the LOG specifi c
message in both these cases and the Log fi le will
indicate a “ºC!” next to the data.
In case the temperature sensor is damaged, “BROKEN
TEMPERATURE SENSOR” will be displayed and the
temperature will display “25.0” and the unit tag
blinking on the second LCD line. The Log fi le will
indicate “ºC!!” next to the data.
RelmV Reading
The RelmV reading can be displayed on the LCD by
pressing the RANGE key.
The relative mV reading is equal to the diff erence
between the absolute mV input and the relative mV
off set established in the relative mV calibration.
Absolute ± Off set = Relative
mV
mV
mV
Relative mV
Measurement
