35
4
Compact Turbimeter
NOTE:
100NTU and 800NTU require inverting
gently 5 - 8 times for accurate calibration. This DOES
NOT APPLY to the low and 20NTU standards.
If standards have expired, are inserted in incorrect
sequence or the 100 and 800NTU standards are
not inverted prior to use
Error 101: Incorrect
Standard
may be shown.
After the final 800NTU standard, the screen
will show
‘Calculating...Please wait’
and a
countdown will appear to show time remaining.
On completion of the process the Compact
Turbimeter screen will show
‘Successful’
.
Press
‘Back’
to leave the calibration process
and return to the Calibration menu.
To cease calibration during the data capture
phase press
‘Cancel’
.
To cease the calibration process at any step,
press
‘Back’
(calibration data will be discarded).
The time, date and Operator ID are stored in
the calibration log for GLP compliance (see
Section 4.4).
Formazin
Select
‘Calibration’
and press
‘OK’
.
Choose
‘Formazin’
and press
‘OK’
.
Acceptable fresh Formazin standards should
be prepared within the following ranges:
Low Standard
0.01 - 1.00NTU
Second Standard
10.0 - 30.0NTU
Third Standard
90.0 - 110.0NTU
High Standard
720.0 - 880.0NTU
Select the lowest (0.01 - 1.00) NTU standard
and insert into the sample chamber with the
orientation mark facing forward.
Use the
Up/Down
buttons to adjust the value on
screen to that on the standard and press
‘Read’
.
Repeat the process for the second, third and
high standards.
After the final standard, the screen will show
‘Calculating...Please wait’
and a countdown
will appear to show time remaining.
On completion of the process the Compact
Turbimeter screen will show
‘Successful’
.
Press
‘Back’
to leave the calibration process
and return to the Calibration menu.
To cease calibration during the data capture
phase press
‘Cancel’
.
To cease the calibration process at any step,
press
‘Back’
(calibration data will be discarded).
The time, date and Operator ID are stored in the
calibration log for GLP compliance (see Page 40,
System menu).
Total Suspended Solids - Correlation
Select
‘Total Suspended Solids’
and press
‘OK’
.
If the Sample ID has already been created use
the
Up/Down
arrows to highlight and press
‘OK’
to select.
If a new Sample ID is required, move the
highlight to a blank area and press
‘New’
.
Create the new Sample ID using the
Up/Down
buttons to select characters as describe in the
‘System’
section.
Select
‘Correlation’
to enter the data entry screen.
The default (0, 0) point is always included. This
can be deleted or edited if not required.
Select
‘Add’
to recall data points from memory
for which a correlated suspended solids value
has been measured.
Press
‘Select’
to enter the concentration of
suspended solids determined externally using
the
Up/Down
buttons.
When data entry is complete press
‘Done’
and
the slope/intercept will be calculated and shown
automatically.
Data points can be edited or deleted as required.
Highlight the data point of interest and select
‘Edit’
.
Choose either
‘Edit’
or
‘Delete’
as required.
When complete select
‘Done’
Press
‘Back’
to
return to the
‘Mode’
menu.
Total Suspended Solids - Factor
Select
‘Calibration’
and press
‘OK’
. Select
‘Total Suspended Solids’
and press
‘OK’
.
If the Sample ID has already been created,
use the
Up/Down
arrows to highlight and
press
‘OK’
to select.
If a new Sample ID is required, move the highlight
to a blank area and press
‘New’
.
Create the new Sample ID using the
Up/Down
buttons to select characters as describe in the
System section.
