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W
ARNINGS & ERRORS
11. WARNINGS & ERRORS
The instrument shows clear warning messages when erroneous conditions appear and when measured
values are outside the expected range. The information below provides an explanation of the errors
and warnings, and recommended action to be taken.
There is an excess amount of ambient light reaching the detector.
Make sure the lid is closed before performing any measurements. If
the issue persists, please contact Hanna Instruments technical support.
The sample and the zero cuvettes are inverted.
Swap the cuvettes and repeat the measurement.
There is either too much light or the instrument can not adjust the
light level.
Please check the preparation of the zero cuvette and that the sample
does not contain any debris.
The meter is either overheating or its temperature has dropped too low
to operate within published accuracy specifications.
The meter must be between 0 and 50 °C (32 and 122 °F) to perform
any measurements.
Meter temperature has changed significantly since the zero
measurement has been performed.
The zero measurement must be performed again.
The measured value is outside the limits of the method.
If possible, change the method range. Verify that the sample does
not contain any debris. Check the sample preparation and the
measurement preparation.