The text " CAL " will flash, the upper value will
count down from 30 to 0 and " End " , then show as :
20.9
26.4 ℃ % O2
The upper display will show the values exactly
same as 20.9 or 20.8. ( As the oxygen in air is
20.9 % typically, so use the environment air 02
value for quick & precise calibration ).
Now the calibration procedures are finished !
Calibration Consideration :
Please process calibration procedures
under wide and ventilating
environment for best effect.
4-2 Dissolved Oxygen ( DO) measurement
1)After the meter be calibrated ( above procedure 4-1 ),
the meter is ready for measurement.
2)Press the " Unit button " ( 3-3, Fig. 1 ) continuously
at least two seconds, the display indicator will change
from " % O2 " change to " mg/L ", now the meter
is ready for Dissolved Oxygen ( DO ) measurement.
3)* Immersed the " Probe head " ( 3-5, Fig. 1 ) to
the measured liquid ( sample ) completely in order
for the probe to be influenced by the automatic
temperature compensation circuit, refer to Fig. 2, page 7.
6
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