Hach Ultra ORBISPHERE 3624, Operator'S Quick Manual

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Page 8
DIET CALIBRATION
There are three types of diet calibration available,
depending on the type of product.
Automatic (diet-a and T.A.-a products only)
Automatic calibration performs a calibration
based on three successive stable measurement
cycles at the start of a product run, and assumes
the product is
in spec when the run starts. After
three successive stable measurements, the new
Diet Calibration Coefficient is calculated based on
the target value for the product.
If there is a large difference between the new
coefficient and the last calibration, a warning
message will be displayed when you press the
Product b utton, showing the percenta ge
difference between the two values.
Manual (diet-m and T.A.-m products only)
A dialog box appears automatically. The last five
measurements are initially set to zero.
Once the measurements displayed indicate a
stable condition (at least three successive stable
measurement cycles), press
OK to close the
dialog box and to calculate the new slope value
for the current product, which is based on the
value in the edit box.
The target measurement for the product is
automatically displayed in the edit box, as the
calibration value. This can be changed based on
any Lab Tests performed, as it is used in
calculating the calibration coefficient.
Absolute (diet and T.A. products only)
Before doing a calibration, it is necessary to check
your water calibration coefficient first. This can be
done during the next rinse-down period.
Make sure you have set the
Water Calibration
Status to On and select water (product number 0)
as the product for measuring. As you start the
measurement process, a new dialog box appears
automatically.
The dialog box will initially display zeros in the last
five measurements column. These values are
then updated every 15 seconds, as new as
measurements are taken.
When the measurements indicate a stable
condition, press
OK to close the dialog box and
apply the most recent reading ( n1 ) as the new
water coefficient. This new coefficient will be
applied as the water correction factor for all diet
and T.A. products.
Once the water calibration is complete, you can
now go through the product calibration process.
Select the
Calibration button in the Products
List window for the required product. This will
display the density of the syrup (at 20°C) and the
mixing ratio (volume of syrup to volume of water),
which can
only be modified if this is a diet product
(not applicable to T.A. products).
The current Slope value is displayed, along with
the Water calibration coefficient calculated during
the water calibration run described above. These
can be changed if required.
Press
Calculate , to compute a new slope value
for the product. Press OK to apply these new
parameters to future measurements of this
product.
Calibration - From PC