EUTECH INSTRUMENTS CD 650, Instruction Manual

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2.4 % Saturation Offset Adjustment
This option lets you offset the meter’s value when cross referenced with
another DO meter. For the PCD 650, DO600 and PD650 meters, you can
adjust % saturation offset calibration /- 10.0% offset.
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.
3.1 Indicators in percentage saturation measurement mode
Note: This is applicable only for the % Saturation mode. For mg/L or
ppm mode, pressure compensation would always be applicable.
Note: When a user calibration is done, the offset will be reset to zero .
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