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Oxygen is consumed during the measurement. For accurate DO measurements, water movement of
0.3 m/s is suggested. This is to ensure that the oxygen‑depleted membrane surface is constantly
measuring a representative sample. Is recommended to use magnetic stirrers. The probe has a
built‑in temperature sensor. Make sure it is also immersed in sample. The measured temperature is
indicated on the second LCD line as shown on page 27. Allow time for the probe to reach a thermal
equilibrium before taking any measurement. This can take several minutes. If the difference between
the temperature at which the probe was stored and the sample’s temperature is greater, the time
will be longer.
If the DO temperature exceeds the limits of the probe, the message “PROBE OUT OF SPEC” will scroll
on the third LCD line and LCD will display dashes. If the temperature exceeds the probe specification
50 ºC, then “50 ºC” will blink on the display. If interval logging, the message “OUT OF SPEC.” will
alternate with the Log specific messages in both of these cases. The Log file will indicate “ºC!” next
to the data.
If the temperature sensor is damaged, “BROKEN TEMPERATURE
SENSOR” will be displayed and the temperature will display “‑‑‑‑”
along with the unit tag blinking on the second LCD line. The Log file
will indicate “ºC!!” next to the data.
OPERA
TIONAL GUIDE
Summary of Contents for edge DO
Page 1: ...DO INSTRUCTION MANUAL ...