User manual HANNA INSTRUMENTS HI 96742

[. . . ] INSTRUCTION MANUAL HI 96742 Iron LR and Manganese 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. [. . . ] Fill a cuvette with 10 mL of the reacted sample up to the mark and replace the cap. For Manganese LR: Fill one cuvette with 10 mL of sample up to the mark. Add the content of one packet of HI 93748A-0 Ascorbic acid, replace the cap and shake gently until completely dissolved. Add 0. 2 mL of the HI 93748B-0 Alkaline-cyanide reagent solution, replace the cap and invert gently to mix for about 30 seconds. Add 1 mL of the HI 93748C-0 0. 1% PAN indicator solution, replace the cap and shake gently. 9· Replace the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. 10·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 Manganese LR: 2 minutes Then press READ/ /TIMER. In all cases the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 11·The instrument directly displays the concentration in mg/L of iron or in µg/L of manganese on the LCD, depending on the 11 selected parameter. Note: A temperature above 30 °C may cause turbidity. In this case, before zeroing and taking readings, add 2-3 drops of Dispersing agent (HI 93703-51) to each cuvette and swirl until complete dissolution of turbidity. 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. · Manganese LR: Aluminum above 20mg/L, Cadmium above 10mg/L, Calcium above 200 mg/L as CaCO3, Cobalt above 20 mg/L, Copper above 50 mg/L, Iron above 10 mg/L, Lead above 0. 5 mg/L, Magnesium above 100 mg/L as CaCO3, Nickel above 40 mg/L, Zinc above 15 mg/L. 8· Press CAL CHECK key and the lamp, cuvette and detector icons together with "CAL CHECK" will appear on the display, depending on the measurement phase. 9· At the end of the measurement the display will show the validation standard value. The reading should be within specifications as reported on the CAL CHECKTM Standard Certificate. If the value is found out of specifications, please check that the cuvettes are free of fingerprints, oil or dirt and repeat validation. If results are still found out of specifications then recalibrate the instrument. 8 9 CALIBRATION Validation and Calibration procedures Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna CAL CHECKTM Standards, otherwise erroneous results will be obtained. For accurate validation and calibration results, please perform tests at room temperature (18 to 25°C; 64. 5 to 77. 0°F). Use the Hanna CAL CHECKTM cuvettes (see "Accessories") to validate or calibrate instruments. [. . . ] 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. [. . . ]