4. MEASURING PROCEDURE
4-1 Calibration
Before the measurement, the meter should be processed
the following calibration procedures :
1)Move the " Protection cover " ( 3-7, Fig. 1 ) away from
the " Probe head " ( 3-5, Fig. 1 ).
Power on the instrument by pushing the " Power Off/On
button " ( 3-2, Fig. 1 ).
The " Display " ( 3-1, Fig. 1 ) will show the
" O2% " and the " Temp. " value as example :
21.4
26.4
℃
% O2
The upper display ( %O2 display ) value will
be changed, wait for approx. 3 minutes at least
until the upper display reading values become
stable & no fluctuation.
Press the " HOLD button " ( 3-3, Fig. 1 ) once, the
" Display " ( 3-1, Fig. 1 ) will show the " Hold "
indicator, then following press the " REC button "
( 3-4, Fig. 1 ) once, the Display will show :
30
Count down from
CAL
30 to 0 and " End "
5
