Hanna Instruments HI 96728 - Manual (Page 9)

9
ERRORS AND WARNINGS
The instrument shows clear messages when erroneous condition appears. Messages are also
displayed when the obtained values are outside expected range. The beeper is playing a beep on
errors.
a) on zero reading
Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.
Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.
No Light: The instrument cannot adjust the light level. Please
check that the sample does not contain any debris.
Inverted cuvettes: The sample and the zero cuvette are inverted.
Zero: A zero reading was not taken. Follow the instructions of
the measurement procedure for zeroing the meter.
b) on sample reading
Under Range: A blinking “0.0” indicates that the sample
absorbs less light than the zero reference. Check the procedure
and make sure you use the same cuvette for reference (zero) and
measurement.