Thermo Electron CorporationVIII-10 Orion Star Series Meter
Dissolved Oxygen Technique
2. To initiate the Winkler titration calibration, press . The
“cal” indicator will light up.
3. 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, the concentration value, which corresponds to
saturation at the current temperature, pressure and salinity,
will be displayed.
4. The concentration value should then be adjusted to the
value that was obtained via the Winkler titration. Use
/ and to enter value. Press to accept the
concentration value.
5. The slope value (
) will then be displayed for three
seconds. The meter will then return to measure mode.
Probe Zero Calibration
If the expected sample range is at the lower end of the
dissolved oxygen scale, you may want to perform a zeroing
of your probe. If the probe exhibits any residual current, this
calibration will compensate for it. A Probe Zero calibration
should always follow as the second point determination of a
two-point calibration. To remove the effects of a Probe Zero
calibration, perform an Air, Water or Winkler calibration as a one-
point calibration. To perform a Probe Zero calibration, follow the
steps outlined below.
To Next Page
Loading...
