ORP
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9. ORP
Press RANGE/
from the measurement screen and select ORP.
9.1. PREPARATION
For accurate ORP measurements, the surface of the electrode must be clean and smooth.
Pretreatment solutions are available to condition the electrode and improve its response
time (see ACCESSORIES section).
The ORP range is factory calibrated.
Note:
For direct ORP measurements, use an ORP probe. MA9020 ORP Solution can be
used to confirm that the ORP sensor measures correctly. mV readings are not temperature
compensated.
9.2. MEASUREMENT
1. Press the RANGE/
until the display changes to mV mode.
2. Remove the probe protective cap and immerse the tip approximately 4 cm (1 ½”) into
the sample. Allow the reading to stabilize ( tag turns off).
The ORP mV reading is displayed on the first LCD line.
The second LCD line displays the temperature of the sample.
