User manual HANNA INSTRUMENTS HI 98703

[. . . ] Instruction Manual HI 98703 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. [. . . ] 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 lamp 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 lamp 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 NTU. RANGE AND UNITS HI 98703 automatically selects the correct range to display the results with the highest accuracy. If the measured value is higher than 1000 NTU (over range), the display will show the maximum value blinking. The instrument has an EPA compliance reading mode. If this feature is activated in SETUP, "EPA" tag will appear on the LCD and the readings will be rounded to meet EPA reporting requirements, as shown in the table: NT U 0. 0-1. 0 1-10 10-40 40-100 100-400 400-1000 > 1000 R c rd to Neares eo t 0. 05 0. 1 1 5 10 50 100 21 CALIBRATION PROCEDURE HI 98703 has a powerful calibration function that compensates for lamp aging or changing. The calibration can be done using the suplied calibration solutions or user prepared standards. HI 98703 turbidimeter is supplied with 4 AMCO standards: <0. 1 NTU, 15 NTU, 100 NTU and 750 NTU. The Hanna standards are specially designed for this instrument. [. . . ] a p kn r L Lo -LO -H I B ttery tag blinking a bAt t N t e o gh light. o nu T e sandard us d fo c rre t ht e run c libratio pont is to lo . a ni ow T e sandard us d fo c rre t ht e run c libratio pont is to high. a ni o T e re aining battey life is to lo . [. . . ]