22
sympHony
™
Meter User Guide
mV, Relative mV and ORP Technique
All meters with pH measurement capability include a mV, relative mV and ORP
function. Measure the raw millivolt (mV) values of an electrode in the mV mode.
Calibrate the relative millivolt (RmV) values of a redox electrode for oxidation-
reduction potential (ORP) measurements in the relative mV and ORP mode.
Note:
The mV measurements are raw readings and cannot be calibrated. Use the
relative mV mode to calibrate mV measurements.
Relative mV and ORP Calibration
1. Prepare the electrode according to the electrode user guide.
2. In the measurement mode, press
until the arrow icon points to the top line,
press
until the
RmV
icon is shown and press
to begin the calibration.
3. Rinse the electrode with distilled water and place it into the standard.
4. Wait for the
RmV
icon to stop flashing. When the
RmV
icon stops flashing, the
meter will display 000.0 RmV. Press
until the first digit to be changed is
flashing, press
/
to change the value of the flashing digit and continue
to change the digits until the meter displays the millivolt value of the standard.
To change the value to negative or positive number, press
until none of the
digits are blinking and the arrow icon is blinking and then press
to change
the sign of the millivolt value.
5. Press
to save and end the calibration.
6. The millivolt offset will be displayed and the meter will automatically proceed to
the measurement mode.
7. Refer to the
pH Measurement
section for instructions on mV, relative mV and
ORP measurements.
pH Technique
Summary of Contents for sympHony
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