Thermo Fisher Scientific CyberScan DO 110 - Manual (Page 13)

Instruction Manual CyberScan DO 110
8
4 CALIBRATION
4.1 Important Information on Meter Calibration
The amount of oxygen dissolved in water will depend on its temperature, atmospheric
pressure and its salinity. While the pressure and salinity values are manually entered
into the instrument, the temperature is being measured by the probe. It is therefore
very important that the temperature is calibrated if necessary prior to the DO
calibration.
The measurements of % Saturation of DO will linearly affect the measurement for DO
in mg/L. Hence calibration in % Saturation of DO should be carried out first. This is
described in the following section.
Before calibrating, press MODE key to select the correct measurement mode. There
are 2 measurement modes for DO: mg/L or ppm, and % Saturation.
NOTE: All new calibrations will automatically over-ride existing calibration values.