User manual HANNA INSTRUMENTS HI 96740

[. . . ] Battery low: The battery must be replaced soon. Preliminary examination: Please examine this product carefully. Each HI 96740 Ion Selective Meter is supplied complete with: · Two Sample Cuvettes and Caps · 9V Battery · Instruction Manual Note: Save all packing material until you are sure that the instrument works correctly. For more details about spare parts and accessories see "Accessories". Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, normal operation of the instrument will be interrupted. [. . . ] 7· Then, in both cases add one packet of HI 93740C-0 EDTA reagent to each beaker, cap and swirl to mix until complete dissolution. 9· Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. 10·Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 11·Fill a second cuvette up to the 10 mL mark with the reacted sample. 12·Insert the second cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. In all cases the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 14·The instrument directly displays concentration 11 in mg/L of nickel on the LCD. 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: Interference may be caused by: Co2+ must not be present Al3+ above 32 mg/L Cd2+ above 20 mg/L Cr3+ above 20 mg/L Cu2+ above 15 mg/L Fe3+ above 10 mg/L Mg2+ above 400 mg/L Mo6+ above 60 mg/L Pb2+ above 20 mg/L 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. 9 11·Then the date of last calibration (e. g. : "01. 08. 2009") appears on the display, or "01. 01. 2009" if the factory calibration was selected before. If the key is kept pressed, the year number is automatically increased. 13·When the correct year has been set, press ZERO/CFM or READ/ /TIMER to confirm. If the key is kept pressed, the month number is automatically increased. 15·When the correct month has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the day blinking. 11-13 FACTORY CALIBRATION RESTORE It is possible to delete the calibration and restore factory calibration. 2 Factory Calibration Restore Accessories: REAGENT SETS HI 93740-01 Reagents for 50 tests HI 93740-03 Reagents for 150 tests OTHER ACCESSORIES HI 96740-11 CAL CHECKTM Standard Cuvettes (1 set) HI 721310 9V battery (10 pcs) HI 731318 Cloth for wiping cuvettes (4 pcs) HI 731331 Glass cuvettes (4 pcs) HI 731335 Caps for cuvettes (4 pcs) HI 93703-50 Cuvette cleaning solution (230 mL). CALIBRATION Fe2+ must not be present Ca 2+ above 1000 mg/L (as CaCO3) Cl ­ above 8000 mg/L Cr6+ above 40 mg/L F­ above 20 mg/L K+ above 500 mg/L Mn 2+ above 25 mg/L Na + above 5000 mg/L Zn2+ above 30 mg/L Note: It is possible to interrupt the calibration procedure at any time by pressing CAL CHECK or ON/OFF keys. 2· When the beeper sounds briefly and the LCD displays dashes, the meter is ready. 3· Press and hold CAL CHECK for three seconds to enter calibration mode. 4· Place the CAL CHECKTM Standard HI 96740-11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. 4 3 or 2· Press READ/ /TIMER to enter in the factory calibration restore screen. 3-4 3· Press ZERO/CFM to restore the factory 3-4 calibration or press GLP/ again to abort factory calibration restore. Warranty HI 96740 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. [. . . ] · Turn the instrument upside down and remove the battery cover by turning it counterclockwise. 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. 16·Press GLP/ to edit the desired day (01-31). 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. Validation 18 GLP In GLP mode, the last calibration date can be verified and the factory calibration can be restored. [. . . ]