User manual HANNA INSTRUMENTS HI 98713

[. . . ] Instruction Manual HI 98713 ISO Portable Turbidimeter w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. This manual will provide you with the necessary information for correct use of the instrument. Please read this instruction manual carefully before using the instrument. [. . . ] Align the mark from the cuvet with the sign on the instrument case and close the lid. Note: If you have a cuvet with orientation mark, place the cuvet into the instrument with the orientation mark aligned with the sign on the instrument top. 19 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 led 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. · Press READ to start the measurement. The display will show blinking dashes and the icons for cuvet, detectors and LED will appear during measurement. At the end of the measurement, the instrument directly displays turbidity in FTU. 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 cuvets. 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 cuvet, detectors and LED will appear. When a new value is displayed, the cuvet 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. 20 · Press READ to start the average reading mode. The display will show blinking dashes and the icons for cuvet, detectors and LED will appear during measurement. When a new partial value is displayed, the cuvet icon and the measurement unit will blink shortly. When the measurement is ended, the final averaged result is displayed directly in FTU. RANGE AND UNITS HI 98713 automatically selects the correct range to display the results with the highest accuracy. [. . . ] Check the standard and use the correct one. Replace batteries. CAP no L Lamp broken or no light. L Lo -LO-HIBat t ery t ag blinking bAt t Not enough light. The standard used for current calibration point is too low. The standard used for current calibration point is too high. [. . . ]