User manual HANNA INSTRUMENTS HI 93414

[. . . ] Instruction Manual HI 93414 Turbidity and Free/Total Chlorine Meter 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 top 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. 22 NORMAL MEASUREMENT This type of measurement can be used for regular readings, 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. If normal measurement is selected, the "AVG" tag will not be displayed. The display will show blinking dashes and the icons for cuvet, detectors and lamp will appear during measurement. At the end of the measurement, the instrument directly displays turbidity in NTU. CONTINUOUS MEASUREMENT This measurement mode can be used when many measurements have to be taken in a short period of time. 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 take a continuous measurement keep READ/TIMER 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/TIMER 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 ZERO/AVG . When this mode is selected, the AVG icon will be displayed on the LCD. 23 · Press READ/TIMER to start the average reading. The display will show blinking dashes and the icons for cuvet, detectors and lamp will appear during measurement. When a new intermediate value is displayed, the cuvet icon and the measurement unit will briefly blink. When the measurement is ended, the final averaged result is displayed directly in NTU. RANGE AND UNITS HI 93414 automatically selects the correct turbidity range to display the results with the highest accuracy. [. . . ] In order to use the instrument again, replace the batteries with new ones or use an AC adapter. BATTERIES REPLACEMENT To replace the batteries follow the next steps: · Press ON/OFF to turn OFF the instrument. · Take out the used batteries and insert 4 new 1. 5V AA size batteries, while paying attention to the correct polarity as indicated on the battery compartment. 48 · Replace the cover and press it until it locks. USING AN AC ADAPTER The HI 93414 can be powered from the AC adapter when used in laboratory. [. . . ]