User Guide

11
Press the RANGE key to change the reading
from ppm to % and vice-versa.
For accurate dissolved oxygen measurements
a water movement of 0.3 m/sec is required
at a minimum. This is to ensure that the
oxygen-depleted membrane surface is con-
stantly replenished. A moving stream will
provide adequate circulation.
The use of a magnetic stir-
rer to ensure a certain veloc-
ity in the fluid is recom-
mended. In this way, errors
due to the diffusion of the
oxygen present in the air in
the solution are reduced to
a minimum.
At all times, the time necessary for thermal
equilibrium to occur between the probe and
the measurement sample must be allowed (a
few minutes if the temperature difference is
only several degrees).
TAKING TEMPERATURE MEASURE-
MENTS
The probe has a built-in temperature sensor.
Press the TEMP key to display the measured
temperature on the secondary display.
RANGE
°C
TEMP