Thermo Electron Corporation
VIII-10
Orion Star Series Meter
Dissolved Oxygen
2. Place the dissolved oxygen probe into the calibration sleeve. Ensure that the
probe membrane does not come into contact with the sponge in the calibration
sleeve. Also ensure that there are no drops of water on the membrane.
3. Make sure Setup has AIR calibration set.
4. To initiate the Air calibration, press the CALIBRATE key. The “cal” indicator
will light up and the current slope (SLP) will be displayed briefly with the
calibration type.
5. While the electrode signal is stabilizing, the meter will flash a dissolved oxygen
reading (based upon the current calibration data) in the main field. Once the
input has stabilized, 101.7 % saturation will be displayed for three seconds. The
meter will return to measure mode.
* A standard 300 mL BOD bottle may also be use for AIR calibration. Fill the
bottom of the bottle with 50 mL of distilled water. Be sure to use the BOD
funnel accessory (Orion Cat. Nos. 080044 or 080160, depending on the probe in
use). Place the probe into the funnel so that it is just above the stirring paddle.
Ensure that there are no drops of water on the surface of the membrane.
Ensure that the water level is 1/2 inch below the tip of the probe. Allow at least
30 minutes for the bottle to equilibrate.
Water Calibration
(using air-saturated water as the calibration standard)
The Water calibration function must be enabled in SETUP before the calibration
is started. When stability is reached, the water standard is set to 100 % or the
corresponding concentration value.
The highest possible accuracy is reached when calibration temperature is the same
as the measuring temperature.
Содержание 3-Star Conductivity
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