Hanna-instruments HI 98703 User Manual download pdf (Page 20)

• Press READ u 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 u 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 u 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 t. When this mode is selected,

the “AVG” icon will be displayed on the LCD.

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Hanna-instruments HI 98703 User Manual Page 20