User manual HANNA INSTRUMENTS HI 96752

[. . . ] INSTRUCTION MANUAL HI 96752 Calcium and Magnesium High Range 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. [. . . ] 8· Calcium: Using a 1 mL syringe add exactly 1 mL of the HI 93752B-0 Ca Oxalate reagent. Magnesium: Using another 1 mL syringe, add to the cuvette exactly 0. 5 mL of sample. Note: Do not mix up the two 1 mL syringes!9· Calcium: Replace the cap and invert the cuvette 10 times to mix. Magnesium: Replace the cap and invert several times to mix. 10·Replace the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. 11·Press 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. Calcium only: invert again the cuvette 10 times replace the cuvette and press READ/ /TIMER. Alternatively wait for: Calcium: 5 minutes, then invert again the cuvette 10 times Magnesium:Wait for 15 seconds 12 then press READ/ /TIMER. In all cases the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 12·The instrument directly displays concentration in mg/L of Calcium or Magnesium on the LCD, depending on the selected parameter. INTERFERENCES: · Calcium: Concentration Reading Acidity (as CaCO3) above 1000 mg/L lower Alkalinity (as CaCO3) above 1000 mg/L higher Magnesium (Mg2+ ) above 400 mg/L higher · Magnesium: Concentration Reading Acidity (as CaCO3) above 1000 mg/L lower Alkalinity (as CaCO3) above 1000 mg/L higher Calcium (Ca2+ ) above 200 mg/L higher Iron higher Aluminum higher Copper higher 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. VALIDATION Validation Note: The validation is performed only for the selected parameter. For full validation of the instrument, the following procedure must be performed for each parameter. 1· Turn the meter on by pressing ON/OFF. [. . . ] 15·Press RANGE/GLP/ to edit the desired month (01-12). If the key is kept pressed, the month number is automatically increased. 16·When the correct month has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the day blinking. [. . . ]