11
The following table lists the error messages and their associated meanings:
Error
Associated Meaning
Typical Cause
1
Lamp failure
Lamp has too low an
output for proper turbidity
measurement.
2
General Calibration failure: There
is not sufficient signal between
the 0.02 NTU and 10.0 NTU
standards used for calibration
Either the wrong standards
were used in calibration or
there is an internal sensor
failure.
3
General Calibration failure: There
is not sufficient signal between
the 10.0 NTU and 100.0 NTU
standards used for calibration
Either the wrong standards
were used in calibration or
there is an internal sensor
failure.
4
General Calibration failure: There
is not sufficient signal between
the 100.0 NTU and 1000.0 NTU
standards used for calibration
Either the wrong standards
were used in calibration or
there is an internal sensor
failure.
Err
Multiple error conditions are met
6.
Routine Maintenance
If you do not plan on leaving the instrument in the supplied carrying case,
when not in use, ensure that the instrument has been turned off and that a
clean sample cuvette fitted with a black cap has been placed in the sample
well. This will ensure that a minimal amount of dust and/or debris will be
able to settle on the optics of the instrument.
6.1 Cuvette Cleaning and Care
Proper measurement of the turbidity of a sample requires the use of a
cuvette that is free of marks, smudges, scratches and any bacterial growth.
Cleaning the cuvette is accomplished by washing the interior and exterior of
the cuvette in a detergent solution. Once cleaned, the cuvette should be
rinsed thoroughly 8 to 10 times with clean distilled water to eliminate the
possibility of detergent buildup and streaking. Cleaned and dried cuvettes
should be stored with the black caps on. The cuvettes can be stored in a
cuvette rack (see accessories and replacement parts list). During normal
operation you may use any typical glass cleaner along with a lint free cloth
or tissue (Kimwipes
®
), to clean the outside of the cuvettes.