4
Compact Turbimeter
36
Select
‘Factor’
to enter the data entry screen.
Highlight
‘Slope’
and press
‘OK’
.
Use the
Up/Down
buttons to enter the slope
calculated externally. The value is limited between
0.1 and 50.0.
Press
‘Done’
to return to the
‘Factor’
screen.
Highlight
‘Intercept’
and press
‘OK’
(in many
cases the intercept will be zero but for straight
line fitting an offset will sometimes be required).
Use the
Up/Down
buttons to enter the intercept.
Select
‘Add’
to recall data points from memory
for which a correlated suspended solids value
has been measured.
To edit factors highlight the slope or intercept
and press
‘OK’
.
Use
Up/Down
buttons to adjust the value.
Press
‘Back’
to return to
‘Calibration’
menu.
Restore Factory Calibration
To restore the default calibration,
select this option and press
‘OK’
.
Choose to continue -
‘Yes’/’No’
.
The screen will show
‘Successful’
.
Care and Maintenance
The Compact Turbimeter has been tested for
IP67 compliance so accidental immersion will
not damage the internal components.
Sample cuvette should be clean and dry prior to
insertion into the sample holder. Lint free cloths
are provided for this purpose.
Silicon oil is also present to use on scratched
cuvette surfaces. Its use should not be necessary
unless turbidity readings are consistently higher
than expected. If required, place two or three
drops onto the vial and smear across the glass
using the lint free cloth.
Indexing cells to find the optimal position for
turbidity measurement is recommended, especially
if measuring low values. The Continuous-Capture
reading mode (see Section 4.5) contains more
details on the suggested method.
User calibration is advised on a need only basis,
using the supplied SDVB standards. Calibration
frequency is at the user’s discretion and can be
deduced by reading the standards to determine
any offset that may have occurred due to fouling.
Subjecting the standards to prolonged exposure
to freezing temperatures will destroy the SDVB
standards, seen by physical settling and a
lowering of the NTU value. The use of a WP48
Heat Pad is recommended in these circumstances
to prevent standard degradation.
Standards have a 12 month stability and should
be replaced after this date.
Replacement calibration sets are available, part
number
PTC 090
, from your supplier or direct
from
Palintest Ltd
.
No prescribed maintenance intervals are possible
due to the high dependence on frequency of use,
types of samples and conditions and user protocol.
Service and maintenance is available via authorised
service centres or direct from
Palintest Ltd
.
Troubleshooting
The Compact Turbimeter has internal diagnostics
to advise on some issues as follows:
Error 100
- Measurement Off-Scale
The reading is above 1050NTU. Dilute using the
provided PT 512 Dilution Tube and clean water
and re-measure.
Error 101
- Incorrect Standard
The standard inserted is either the incorrect value
or is no longer within an acceptable tolerance for
calibration. Use the correct standard or replace
the expired calibration set.
Error 107
- Blanking Error
The sample cuvette cap is not attached allowing
ambient light into the
QuadoptiX™
chamber or the
sample cuvette is not fully inserted. Replace the cap
and read again or fully insert the sample cuvette.
Error 110
- Battery Low
The available power is insufficient to support
reliable analysis. Replace the batteries.
Error 111
- Battery Critical
Battery level is critically low and the instrument
will automatically shut down immediately to
ensure all data is written to the memory correctly.
Other more general issues that arise may be as follows:
