23
OPERATIONAL GUIDE
Steps To Optimize
1. Determine if Concentration or % Saturated measurements will be made.
2. Prepare the Dissolved Oxygen (DO) probe for measurement.
3. Connect the probe to the meter and configure the SETUP parameters.
4. Calibrate the DO sensor.
5. Take measurements using the DO sensor.
Measurements Available
Concentration measurements in water and % oxygen‑saturated measurements are available using
edge
® DO
together with HI764080 DO probe. Algorithms used for concentration measurements (units
of ppm or mg/L) are based upon the oxygen solubility in air‑saturated fresh water. Compensation for
salinity and altitude are made by configuring SETUP options. Percent saturation measurements are
based upon the partial pressure of oxygen and are suitable for measurement in samples other than
air‑saturated fresh water. It is advised to check material compatibility of the probe with the sample.
DO Probe Preparation
CAUTION: Use care during servicing and use. The HI764080 contains a glass
insulator. Do not drop or handle carelessly.
Probes from Hanna Instruments are shipped dry.
1. Carefully remove the cardboard shipping tube used to protect the probe
during shipping. Save the tube, should the probe be stored dry again.
2. Open membrane package and remove one O‑Ring and one membrane
cap.
3. Rinse the membrane cap with a small amount of HI7041 electrolyte and
discard.
4. Position O‑Ring in cap as indicated. Refill membrane cap
3
/
4
full with
electrolyte solution, ensure to cover the O‑Ring.
5. Holding the membrane cap by the top, tap the side walls of the membrane
cap to dislodge gas bubbles and force them to rise to the surface. Do not
tap on the membrane directly as it may damage it.
6. With the probe facing down, slowly screw the cap counterclockwise until
completely tightened. Electrolyte will overflow.
7. Rinse outer body of the probe and inspect membrane for entrapped gas bubbles. The cathode
area should be free of bubbles.
8. Connect the DO probe to edge
® DO
meter and turn meter on.
9. Allow probe conditioning (polarizing) function to occur.
DISSOLVED OXYGEN SETUP
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