35
2.
If you wish to continue, immerse the probe in distilled water press
ENTER
or ESC
the raw data is seen on the LCD display. When the data is stable press
ENTER.
The turbidity calibration coefficients will then be automatically updated.
3.
Immerse the probe in solution with turbidity between 100 and 600ntu's,Select
Cal high set point and press
ENTER
a visual display of the raw data is seen on the
LCD display. When the data is stable press
ENTER.
Press the
number
keys to
change the displayed value to the correct value (whichever was selected
between 10 and 600) then press
ENTER,
the turbidity calibration coefficients will
then be automatically updated and the instrument will return to the calibration
menu.
Depth calibration
If the optional depth sensor is fitted then it will also require calibration. To perform the
depth calibration you need to lower the probe to a known depth in the water. This can
be done by placing a mark on the probe cable at a measured distance from the bottom
of the probe assembly then, making sure that the probe cable is vertical, lower the
probe until the mark is at the surface of the water.
1.
Select DEPTH from the calibration key, the message CAL high or low set point
(ENTER/ESC) will be displayed. Press
ESC
to exit without changing the depth
calibration.
2.
If you wish to continue, select Cal low set point and make sure that the probe is
above the surface of the water and press
ENTER
, the raw data will be displayed
on the LCD display press ENTER to accept this point the coefficients will then be
automatically updated. Select cal high set point and submerge the probe to
your pre measured depth and make sure that the cable is vertical. Press the
ENTER key
keys to from 1 to 100 meter points. Press
ENTER
the raw data will be
displayed on the display. When stable press
ENTER
and use the number keys to
change the display to the correct value then press
ENTER
. The depth calibration
is now complete.