User Guide

11
• Refer to Table 1 on page 10 for the corre-
sponding dissolved oxygen reading at that
temperature.
• Switch to "O
2
" position
and adjust the "Slope"
trimmer until the correct
reading is displayed; e.g.
at 20.5°C the trimmer
should be adjusted until
display reads 9.08.
CORRECTION FOR ALTITUDE EFFECT
If the calibration is not performed at sea level
a correction should be made for the differ-
ence in altitude according to Table 2 on page
11; e.g. if calibrated at 20.5°C at an altitude
of 300 m above sea level, the display should
be adjusted to 9.08 x 0.96 = 8.72.
CORRECTION FOR SALINITY EFFECT
Another correction has to be performed if the
sample presents significant salinity concen-
trations. In such case, the reading has to be
adjusted according to Table 3 on page 12;
e.g. if calibrated at 20.5°C and the sample
has a salinity content of 3 g/l, the display
should be set at 9.08 - (3 x 0.0478) = 8.94.
OFF
O
2
STB °C
SLOPE
ZERO
°C
SLOPE
ZERO
°C
SLOPE
ZERO
°C