Preparation of Zero Oxygen Solution
Dissolve 500 mg of the sodium sulfate (Na
2
SO
3
) reagent and a small
amount of cobalt (II) chloride hexahydrate (CoCl
2
•
6H
2
O) in the 250 ml
distilled water, mix the solution until reagent is completely dissolved.
Tester Specifications
Model
DOscan10
Dissolved Oxygen
Range
0.0 to 20.0 mg/L
Resolution
0.1 mg/L
Accuracy
± 0.5 mg/L
% Saturation
Range
0.0 to 200.0%
Resolution
0.1%
Accuracy
± 2.0%
Other Specifications
Calibration Point
1 or 2 points
Temperature Compensation
0 to 40° C (32 to 104° F), automatic
Barometric Pressure Correction 450 to 850 mmHg, manual
Salinity Correction
0 to 35 g/L, manual
Operating Temperature
0 to 50° C (32 to 122° F)
Storage Temperature
0 to 60° C (32 to 140° F)
Relative Humidity
< 80% (non-condensing)
IP Rating
IP54
Display
LCD, 21 × 21 mm (0.82 × 0.82 in.)
Power Requirements
2 × 1.5V AAA alkaline batteries
Auto-Off
8 minutes after last key pressed
Dimensions
175 (L) × 40 (Ø )
mm (6.89 × 1.57 in.)
Weight
100
g (3.5 oz.)
Troubleshooting
Fault
Cause and Corrective Action
Screen shows
Dissolved oxygen electrode does not connect to the
tester or measured value is out of range.
Drifting erratic
readings
Check whether the membrane cap is contaminated
or the electrolyte solution is depleted.
Screen shows
Electrode is broken.
Replace the dissolved oxygen electrode.
5
I
DOscan10
1. Set the barometric pressure and salinity coefficient in the setup
menu.
2. Rinse the electrode with distilled water.
3. Place the electrode into the sample solution and stir gently. Wait
for the measurement to stabilize and record the reading.
•
During the measurement, if the display shows ---- indicating the
measurement exceeds the range, remove the electrode from the
sample solution immediately.
•
If the
option is enabled in the setup menu, the tester will
automatically lock the measurement endpoint and show
HOLD
icon. Press the
Meas
key to resume measuring.
Electrode Maintenance
•
Rinse the electrode thoroughly with distilled water after use.
•
Do not touch the membrane and always keep it is clean and wet.
•
If you do not use the electrode for long periods, screw off the
membrane cap, rinse the electrode anode, cathode, membrane
cap with distilled water and blot dry. Install the electrode and
store dry.
Appendix
Optional Accessories
Order Code
Description
DO100
Dissolved oxygen electrode, range: 0 to 20 mg/L
DO-MEM
Membrane cap, 2 PCS/set
DO-ES
Electrolyte solution, 30 ml
Preparation of Air-Saturated Water
Use an air-pump to blow air into distilled water at least 1 hour, while
stirring the solution.
Cathode
Anode
