Thermo Fisher Scientific CyberScan DO 600 - Manual (Page 113)

105
2.5 Set barometer pressure range and barometric pressure
units
The PCD 650 meter is capable of measuring barometric pressure with
its built-in pressure sensor. In the event that the pressure reading is
inaccurate, you can calibrate the value from the setup menu.
2.6 Pressure compensation
If pressure comp. is set to ‘ENABLE’, the meter will compensate for the
barometric pressure at the location depending on the altitude. For
example, if the barometric pressure is 700 mmHg the full scale
calibration would be done at 92.1%. This is relative to the pressure at
sea level.
If the pressure comp. is set to ‘DISABLE’, then there would be no
compensation for the pressure. The calibration would be done at 100%
irrespective of the altitude.
3. Percentage Saturation (%) Measurement
Mode
In percentage saturation measurement mode, the meter displays % saturation
and temperature reading. The LCD shows related information for the
saturation measurement such as temperature compensation mode, stable
indicator, barometric pressure, calibration points, probe condition, response
time of the DO probe and alarm conditions. You can customize or
enable/disable some of these indicators in the Setup mode.
Note: This is applicable only for the % Saturation mode. For mg/L or
ppm mode, pressure compensation would always be applicable.