Hach DR 2800, User Manual, Page: 79 / 96

79
Section 8 Troubleshooting
Problem/Display screen Likely Cause Action
Absorbance > 3.5! The measured absorbance exceeds 3.5
Dilute the sample and repeat the
measurement
Concentration too high!
Calculated concentration is higher than
999999 Dilute the sample and repeat the
measurement
Error
Barcode control number?
Please update program data!
Discrepancy between barcode test data
and stored information.
Data updating
Error
Program not available.
Please update program data!
Barcode test missing Data updating
Error
Clean Cuvette The cell/cuvette is soiled or there are
undissolved particles in the cuvette Clean the cuvette; allow the particles to
settle
Error
Selfcheck stopped.
Please check the lamp.
Please close the lid.
Self Check Test stops while starting the
instrument
Check the lamp and replace it if
necessary.
Close the lid and press
START AGAIN
.
Error
Selfcheck stopped.
Please remove the cuvette
Self Check Test stops while starting the
instrument
Remove the cell and press OK .
Hardware error. Electronic defect
Contact the manufacturer or a sales
representative
It’s recommended to execute a
Full System Check
Please remove cuvette.
Please close the lid.
The instrument needs a new
Full System Check. Remove cell; close the lid and press
START
..
Negative result! The calculated result is negative Check the concentration of the sample
No evaluation!
Error in the test database / user
database
Check the programming
Contact the manufacturer or a sales
representative
Over measuring range
The measured absorbance is above the
calibration range of the test Dilute the sample and repeat the
measurement
Please check the lamp. The lamp output is too low
Check the lamp and replace it if
necessary
Too much ambient light!
Move instrument into shade
or close the lid!
The instrument sensors detect too much
ambient light.
Close the lid, shade the instrument,
or place the protective cover over
sample cell compartments
Under measuring range
The measured absorbance is below the
calibration range of the test
If possible, select a test with a lower
measurement range or use a cuvette
with a longer path length
Unstable lighting conditions!
Fluctuating ambient light conditions
during the measurement
Close the lid or place the protective
cover over sample cell compartments
and repeat the measurement.