Horiba Scientific LAQUAact D-75G, Инструкция по эксплуатации

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Dissolved oxygen measurement
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Performing calibration
Calibration of the DO electrode is required for accurate measurements. According to the
following procedure, perform calibration correctly.
You can perform air one-point calibration and two-point calibration using the standard
solution with this instrument. We recommend that calibration be performed once a day
before the first measurement.
Note
To perform accurate calibration, set the air pressure value before calibration (“ Setting air
pressure correction (default: 1013 hPa) ” (page 34)).
• Performing air calibration
This section describes the method of air one-point calibration.
Note
・
Air calibration must be performed in clean air. If air calibration is performed in a location
subject to dramatic temperature swings, exposed to wind and rain, or near a heating
appliance, an error may occur or the value may not be stabilized.
・
Do not hold the DO electrode during calibration with hand. DO electrode may be affected
by temperature, causing an unstable value.
1. Wash the membrane at the tip of the DO
electrode with pure water (or deionized water)
and wipe it with a soft cloth at least 10 minutes
before calibration.
Be careful not to break the membrane at the tip of
the electrode.
2. Press the key to enter the calibration mode.
key