* With the " REC " symbol on the display :
(a) Push the " Memory CALL button " ( 4-7, Fig. 1 )
once, the " Max " symbol along with the maximum
value will appear on the display.
(b) Push the " Memory CALL button " again, the " Min "
symbol along with the minimum value will appear
on the display.
(c) Push the " Memory CALL button " again, the
" AVG " symbol along with the average value will
appear on the display.
(d) To exit the memory record function, push the
" RECORD " button once again. The display will
revert back to the current reading.
5-7 Quick operation procedures :
Calibration procedures
Power on, slide the " DO/O2 selector " to " O2 " position.
Disconnect the probe from the meter.
Push the " Zero button ", display will show zero.
Connect the probe to the meter. Until the display reading
reach the stable values ( approx. 5 minutes ). Push the " O2
Cal. " position, then display will show 20.9.
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