Horiba Scientific LAQUA-PD210, Инструкция по эксплуатации

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DO calibration
15
● DO Calibration
Calibration is necessary for accurate dissolved oxygen measurement. Two DO calibration
modes are available in PD meter for calibration,
• Saturated oxygen concentration mode (%)
• Dissolved oxygen measurement mode (mg/L)
To perform various DO calibrations, follow the procedures detailed below:
Set the air pressure value (default setup is 101.3 kPa) before calibration for accurate
measurement.
● Calibration in saturated oxygen concentration mode (%)
Prerequisites
• Clean the membrane at the tip of the DO electrode with DI (deionized) water and wipe it
with tissue paper.
• Switch on the PD meter and plug in the DO electrode.
• Press the key to keep the PD meter in saturated oxygen concentration mode (%)
mode.
• Calibration performed in clean air is referred as air calibration.
• Perform the air calibration in clean air at a location not subjected to dramatic temperature
change, rain or direct wind.
• Do not hold the tip of DO electrode with hand during calibration, as the electrode may be
affected by temperature causing instability in calibration value.
To abort an ongoing calibration process at any point of time, press the key.
Note
Note
Tip