8-2 Calibration
1)Install the " Probe Plug " ( 8-1, Fig. 5 ) into the
" DO Socket " ( 3-14, Fig. 1 ).
2)Power on the meter by pressing " Power Button "
( 3-2, Fig. 1 ) once.
* Select the Meter's mode to " do " ( Dissolved Oxygen "
measurement.
* Press the " Function Button " ( 3-6, Fig. 1 ) once, to
let Display unit will show " %O2 " instead of " mg/L ".
3)Wait for approx. 5 minutes at least until the
display reading values become stable & no
fluctuation.
4)Use the two fingers to press the " REC Button " ( 3-4,
Fig 1 ) and HOLD Button " ( 3-3, Fig. 1 ) at the same
time, the display will show the following screen as
example, release the both fingers.
20.9
CAL
5)Press the " Enter Button " , the Display value will count
from 30 to 0, then return to normal measuring screen
and finish the calibration procedures. The complete
calibration procedures will take 30 seconds
approximately.
Press the " Function Button " ( 3-6, Fig. 1 ) once,
to let Display unit to return " mg/L ".
Calibration Consideration :
a
As the oxygen in air is 20.9 % typically, so use
the environment air 02 value for quick &
precise calibration.
b
Please process calibration procedures under
wide and ventilating environment for best effect.
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