Campbell Scientific CSBUOY-DT Buoy System with Dissolved Oxygen and Temperature - Manual (Page 21)

Section 5. Maintenance
5.1.4.1 Air Calibration
1. Place the dissolved oxygen probe in the air, shaded from the sun. Wait for
the measurement reading to stabilize. This may take 15 minutes or more.
2. Determine the air temperature (use the temperature reading from the
probe; this is found on the Device Configuration Utility screen) and the
barometric pressure(preferred) or elevation.
3. Using the calibration chart determine the oxygen concentration in the air.
4. Use the following equation to calculate the multiplier:
M = P/R
M = Multiplier
P = Concentration in PPM of the air (from calibration chart).
R = The signal output in mV of the dissolved oxygen probe.
5. Enter the multiplier in Device Configuration Utility or LoggerNet from the
calculated number.
5.1.4.2 Hand Calibration
1. Use a hand-held dissolved oxygen meter to determine the correct
concentration of dissolved oxygen in the water (the accuracy of the
method will be dependent upon the accuracy of the hand held device).
2. Use the following equation to calculate the multiplier:
M = D/R
M = Multiplier
D = measured dissolved oxygen in PPM.
R = The signal output in mV of the dissolved oxygen probe.
3. Enter the multiplier in Device Configuration Utility or LoggerNet from the
calculated number.
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