39
I
A180/181
Setting the Parameters
1.1 Ensure that the meter is in the OUR or SOUR mode. Press and
hold the
key to enter the setup menu.
1.2 Press the
/
key to select the
Parameters
, press the
Enter
key to confirm.
1.3 Press the
/
key to set the option or value, press the
Enter
key to confirm. When the setting is completed, the meter will
automatically return to the measurement mode.
•
During the setting process, press and hold the
/
key will
make the value change faster.
•
To exit the setting without saving changes, press the
ESC
key.
Measurement
2.1 Place the dissolved oxygen electrode into the sample solution
and stir gently.
2.2 Press the key, the meter begins the measurement, the screen
shows the current dissolved oxygen readings.
2.3 When the maximum time is reached, the meter will show the
calculated OUR or SOUR result.
•
During the measurement process, press the
key, the meter
will take a new measurement.
•
In the SOUR mode, the
Solids Weight
parameter must be set
to correct value. In the OUR mode, this parameter must be set
to 1.0.
•
If you want to exit the OUR and SOUR measurements, press the
Mode
key to convert the measurement mode.
Electrode Maintenance
•
Rinse the dissolved oxygen 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 and rinse the electrode anode, cathode, membrane
cap with distilled water and blot dry. Install the electrode and
store dry.
Cathode
Anode
Appendix
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.
Preparation of Air-Saturated Water
Use an air-pump to blow air into distilled water at least 1 hour, while
stirring the solution.
Optional Accessories
Dissolved Oxygen Electrode and Components
Order Code
Description
DO100
Dissolved oxygen electrode, range: 0 to 20 mg/L
DO-MEM
Membrane cap, 2 PCS/set
Solution
Order Code
Description
DO-ES
Electrolyte solution, 480 ml
