Hach sension6 Instruction Manual page 61

SECTION 6,
continued
5.
Prepare the
calibration and storage
chamber by holding it
under water and
squeezing it a couple of
times to pull water into
the lower chamber
through the inlet.
Alternately, open the
bottom of the chamber
and insert a
water-soaked sponge.
Note: New sponges will
be compressed. Add
water to expand them.
Note: Avoid completely
filling the lower chamber
with water.
6.
Insert the DO probe
into the calibration and
storage chamber. The
probe tip must not be
flooded with water or be
holding a drop of water
on the membrane.
7.
Allow at least ten
minutes for the
atmosphere in the
chamber to reach a
steady state.
Note: To speed up probe
stabilization, squeeze the
lower chamber a couple of
times to force water
saturated air into the
chamber.
Note: Keep the DO probe
at a uniform temperature.
When holding the probe,
do not touch the metallic
button on the side of the
probe. The button is a
temperature sensor. An
inaccurate calibration will
result if the temperature of
the thermistor is different
from the probe membrane.
60
8.
Press the key
CAL
located in the lower left
corner of the display.