5. Setting the Salinity Correction Value
The salinity of the sample affects the Dissolved Oxygen reading in ppM
mode. As the salinity increases, the solubility of Oxygen decreases. The
Dissolved Oxygen sensor is not able to detect the salinity of the sample,
so the operator must enter this value manually for salinity-corrected ppM
Dissolved Oxygen readings.
To set the salinity correction value:
1.
Measure the salinity of the sample solution. For best results, use a
good quality salinity meter, such as a TPS model Aqua-C or WP-84.
Note the reading.
2.
Switch the
Aqua-DY
on.
3.
Press the
key until the meter is in Salinity mode (see section 2).
The currently selected salinity correction value is displayed.
4.
Press and hold the
key for 2 seconds.
5.
The display should now look like this:
Enter Man.
Sal
�
36.0
�
6.
Press the
and
keys until the bottom line shows the salinity
value obtained in step 1.
7.
Press the
or
key to set the salinity correction value.
NOTES:
1.
For non salinity-corrected readings in ppM mode, simply set the
salinity correction value to 0.0 .
2.
If the salinity correction value is set to above zero, an “
S
” is added to
the display in ppM mode, to signify that salinity correction is being
applied. For example…
8.24ppMS
25.0
o
c
3.
The salinity correction value is ignored during zero and air calibration.
There is therefore no need to re-set the salinity correction value when
calibrating Dissolved Oxygen.
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