Hanna Instruments HI 98703 - Manual (Page 20)

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• Press READ to start the measurement.
The display will show blinking dashes and the
icons for cuvette, detectors and lamp will appear
during measurement.
• At the end of the measurement, the instrument
directly displays turbidity in NTU.
NORMAL MEASUREMENT
This type of measurement can be used for regular measurements, when the sample is stable and
normal accuracy is required. In normal measurement mode, the lamp is ON for a minimum period of
time (about 7 seconds), saving the battery life. Normal measurement takes about 10 seconds.
If normal measurement is selected, the “
AVG” tag will not be displayed.
CONTINUOUS MEASUREMENT
This measurement mode can be used when many measurements have to be taken in a short period
of time. The feature is also useful to evaluate a very fast settling sample. This measurement mode
is recommended for indexing cuvettes. After the first reading is taken, the lid opening will not
generate any errors.
The first value is displayed after about 10 seconds and then a new reading is displayed each second.
In order to make a continuous measurement keep
READ pressed until the desired number of
measurements are taken. The display will show blinking dashes and the icons for cuvette, detectors
and lamp will appear. When a new value is displayed, the cuvette icon and the measurement unit
will briefly blink.
The last value remains on the display after the
READ is released.
AVERAGED MEASUREMENT
Select this measurement mode when samples that cause unstable readings are analyzed. By averaging
several readings, the random noise generated by the sample is reduced and accurate measurements
can be taken.
This mode can also be selected when high accuracy measurements are desired. In the average mode
10 measurements are averaged in a short period of time (about 20 seconds). The initial value is
displayed after 10 seconds and the display is updated every second with an intermediate value.
• To select the averaged measurement mode
press AVG ▼ . When this mode is selected,
the “ AVG” icon will be displayed on the LCD.