DO Calibration
20
DO Calibration
Calibration is necessary for accurate DO measurement. Two calibration modes are
available in DO meter for calibration,
DO concentration mode (mg/L)
DO saturation mode (%)
To perform DO calibration, follow the procedure detailed below:
Prerequisites
Clean the membrane at the tip of the DO sensor with DI (deionized) water and wipe it
with tissue paper.
Switch on the meter and plug in the DO sensor.
Set the Focus area in DO measurement mode.
Press the
key to keep the meter in DO concentration (mg/L) or DO saturation (%)
mode.
Note
High [100 %] calibration are available to calibrate in water vapor-saturated air with a
calibration bottle or in air-saturated water.
The sponge in the calibration bottle must be moist.
Prepare Low [0 %] calibration solution by adding 2 g sodium sulfite (Na
2
SO
3
) to 1000 mL
deionized water and stirring the mixture to completely dissolve it.
Tip
To abort an ongoing calibration process at any point of time, press the
key.
www.calcert.com
1.800.544.2843
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Summary of Contents for Oakton 300 Series
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