User manual HANNA INSTRUMENTS HI 83414

[. . . ] Instruction Manual HI 83414 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. [. . . ] · Fill a clean, dry cuvet with 10 mL of sample up to the mark, taking care to handle the cuvet by the top. · Wipe the cuvet thoroughly with a lint-free cloth to remove any fingerprints, dirt or water spots. · Apply silicone oil on the cuvet and wipe with a lint-free cloth to obtain an even film over the entire surface of the cuvet. Note: It is very important to oil the cuvet, especially for low turbidity values (< 1 NTU) to hide the glass imperfections which can influence the reading. Align the mark from the cuvet with the sign on the instrument top · Close the lid. Note: If you have a cuvet with indexing mark, place the cuvet into the instrument with the indexing mark aligned with the sign on the instrument top. 21 NORMAL MEASUREMENT This type of measurement is best suited for regular readings, when the sample is stable and normal accuracy is required. In normal mode, the measurement takes about 10 seconds and the lamp is ON for a minimum period of time (about 7 seconds). · Press "Read" functional key to take the measurement. The display will show "READ" in the left side and blinking dashes. The dashes and lamp icon will appear during different measurement phases. CONTINUOUS MEASUREMENT This measurement mode is suitable when many measurements have to be taken in a short period of time. · Press "Read" functional key and keep it pressed to take continuous readings. The display will show "READ" in the left side and blinking dashes. The dashes and lamp icon will appear during different measurement phases. The first value is displayed after 10 seconds and then a new reading is displayed each second as long as the "Read" functional key is kept pressed. When a new value is displayed, the measurement value will briefly blink. The last value remains on the display after the "Read" functional key is released. AVERAGED MEASUREMENT This measurement mode is useful when samples that cause unstable readings are analyzed. By averaging several readings, noise effect is reduced and accurate measurements can be taken. This mode can also be selected when high accuracy measurements are needed. In the average mode 10 measurements are averaged in a short period of time (about 20 seconds). [. . . ] Meter information Press "Select" functional key to view the Instrument model, firmware version, language version and instrument serial number. Press ESC to return to the Setup mode. 39 LAMP REPLACEMENT The instrument tungsten lamp has a life longer than 100, 000 measurements. When the lamp is broken, the instrument displays a lamp error message. To replace the lamp follow the next steps: · Power off the instrument and take out the power cord. · Unlock the lamp and extract it by pulling it out from the lamp holder handler. [. . . ]