Operational Guide
20
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 confi gure 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 HI 764080 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 confi guring 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 HI 764080 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 HI 7041
electrolyte and discard.
4. Position o-ring in cap as indicated. Refi ll 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
overfl ow.
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.
During this process, the following message will be
displayed on the LCD, “DISSOLVED OXYGEN PROBE
CONDITIONING”.
The conditioning message will be displayed for about
60 seconds while the DO probe is conditioned. If the
probe was conditioned and a new conditioning is not
necessary, press any key to enter measurement mode.
Operational
Guide
Dissolved
Oxygen
Setup
Содержание edge DO
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