Hanna-instruments HI 88703 Manual do Utilizador descarregar pdf (Página 23)

Note:The reading of the first point colud be skipped by pressing the Skip key. In this case, the

0.00 NTU point will be used for calibration.

• Place the <0.1 NTU standard cuvette (or the

cuvette with dilution water) into the holder and

ensure that the cuvette mark is aligned with the

sign on the instrument top.

• Close the lid and press the Read key. The

display will show the value blinking and the lamp

icon during measurement.

Note:If the Average mode was previously selected, the measurement in calibration mode will be

done using the average.

• At the end of the measurement, the second

proposed calibration point (15.0 NTU) is

displayed.

• Remove the first standard cuvette.

• Place the 15 NTU standard cuvette (or the second

formazyne prepared standard) into the holder, with

the cuvette mark aligned with the sign on the

instrument top.

Note:If necessary, press s or t key to edit

each calibration point value to match the

exact value of the standard as measured

with a reference turbidimeter.

• Close the lid and press the Read key. The

display will show the value blinking and the lamp

icon during measurement.

• If Non ratio Turbidity range is selected, the

display will briefly show “Store...” and the two

point calibration is saved. The instrument returns

in the main screen.

• If Ratio Turbidity range is selected, at the end of

the measurement, the third proposed calibration

point (100 NTU) is displayed.

• At this moment it is possible to exit calibration

by pressing the End key.

• If the calibration is terminated, the display will

briefly show “Store...” and the two point

calibration is saved. The instrument returns in the

main screen.

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Hanna-instruments HI 88703 Manual do Utilizador Página 23