User manual HANNA INSTRUMENTS HI 96741

[. . . ] INSTRUCTION MANUAL HI 96741 Total Hardness and Iron LR ISM Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. Functional description: Errors and warnings: ON ZERO READING: Light High: There is too much light to perform a measurement. [. . . ] After a few seconds the display will show "-0. 0-". Remove the ZERO sample and insert the READ1 sample into the instrument. Press and hold READ/ /TIMER for three seconds. The display will show the countdown prior to measurement. The beeper is playing a beep at the end of countdown period. The lamp, cuvette and detector icons will appear on the display, depending on the measurement phase, then the instrument will display the level of Magnesium hardness in mg/L CaCO3 (togheter with "n"). 6· After a few seconds the display will show "-0. 0-". The meter is now zeroed and ready for measurement. 8· Add the specific test reagent for each parameter: Total hardness: the third cuvette (nothing is added) Iron LR: Fill one graduated mixing cylinder up to the 25 mL mark with the sample. Add the content of one packet of HI 93746-0 reagent, close the cylinder and shake well for 30 seconds. Fill a cuvette with 10 mL of the reacted sample up to the mark and replace the cap. 9· Replace the cap and swirl the solution. 10· Replace the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. 11· Press and hold READ/ /TIMER for three seconds. The display will show the countdown prior to measurement. The beeper is playing a beep at the end of countdown period. Alternatively, wait for: Iron LR: 30 seconds Then press READ/ /TIMER. For Hardness press READ/ /TIMER directly. In all cases the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 12·The instrument directly displays the 12 concentration in mg/L of iron or for hardness the instrument will display the concentration of Calcium in mg/L CaCO3 on the LCD, depending on the selected parameter. INTERFERENCES: · Iron LR: Cadmium above 4. 0 mg/L, Chromium6+ above 1. 2 mg/L, Copper above 0. 6 mg/L, Manganese above 50. 0 mg/L, Molybdenum above 4. 0 mg/L, Nitrite ion above 0. 8 mg/L, Chromium3+ above 0. 25 mg/L, Cobalt above 0. 05 mg/L, Cyanide above 2. 8 mg/L, Mercury above 0. 4 mg/L, Nickel above 1. 0 mg/L. Sample pH should be between 3 and 4 to avoid developed color to fade or turbidity formation. · Total Hardness: Excessive amounts of heavy metals. [. . . ] The instrument displays a battery indicator with three levels as follows: · 3 lines for 100 % capacity · 2 lines for 66 % capacity · 1 line for 33 % capacity · Battery icon blinking if the capacity is under 10 %. If the battery is empty and accurate measurements can't be taken any more, the instrument shows "dEAd bAtt" and turns off. To restart the instrument, the battery must be replaced with a fresh one. To replace the instrument's battery, follow the steps: · Turn the instrument off by pressing ON/OFF. [. . . ]