User manual HANNA INSTRUMENTS HI 96770

[. . . ] CAL CHECK key: press to perform the validation of the meter, or press and hold for three seconds to enter calibration mode. ZERO/CFM key: press to zero the meter prior to measurement, to confirm edited values or to confirm factory calibration restore. READ /TIMER key: In measurement mode, press to make a measurement, or press and hold for three seconds to start a preprogrammed countdown. Cuvet holder ON SAMPLE READING: Inverted cuvets: The sample and the zero cuvet are inverted. [. . . ] 14· The instrument directly displays concentration in mg/L of silica (SiO2) on the LCD. To convert the reading to mg/L of silicon (Si) multiply the reading by 0. 467. 13 If the value is found out of specifications, please check that the cuvets are free of fingerprints, oil or dirt and repeat validation. If results are still found out of specifications then recalibrate the instrument. CALIBRATION Note: It is possible to interrupt the calibration procedure at any time by pressing CAL CHECK or ON/OFF. 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. The blinking "ZERO" asks for instrument zeroing. 12· Press GLP/ to edit the desired year 12-13 (2000-2099). 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. If the key is kept pressed, the day number is automatically increased. Note: It is possible to change the editing from day to year and to month by pressing READ /TIMER. 18· The instrument displays "Stor" for one second and the calibration is saved. 19· The instrument will return automatically to measurement mode by displaying dashes on the LCD. FACTORY CALIBRATION RESET It is possible to restore the factory calibration. 1 Factory Calibration Reset Accessories: REAGENT SETS HI 96770-01 Reagents for 100 SILICA HIGH RANGE tests HI 96770-03 Reagents for 300 SILICA HIGH RANGE tests OTHER ACCESSORIES HI 96770-11 CAL CHECKTM Standard Cuvets (1 set) HI 721310 9V battery (10 pcs) HI 731318 Tissue for wiping cuvets (4 pcs) HI 731331 Glass cuvets (4 pcs) HI 731335 Caps for cuvets (4 pcs) HI 93703-50 Cuvets cleaning solution (230 mL). INTERFERENCES Calibration · Iron (Fe2+ and Fe3+) interferes at high levels. · Phosphates does not interfere up to 50 mg/L PO43-. 14-15 or 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 cuvets (see "Accessories") to validate or calibrate instruments. 3 2· When the beeper sounds briefly and the LCD displays dashes, the meter is ready. 3· Place the CAL CHECKTM Standard Cuvet A into the cuvet holder and ensure that the notch on the cap is positioned securely 4-5 into the groove. 4· Press ZERO/CFM and the instrument status indicator will appear on the display, depending on the measurement phase. 5· After a few seconds the display will show "-0. 0-". [. . . ] For yours and the instrument safety do not use or store the instrument in hazardous environments. Safety Data Sheets Read the relevant SDS sheets before performing the test. 16 Safety Data Sheets are available at: www. hannainst. com IST96770R1 02/07 4· Place the CAL CHECKTM Standard Cuvet A into the cuvet holder and ensure that the 4 notch on the cap is positioned securely into the groove. 6· Press ZERO/CFM and the instrument status indicator will appear on the display, 6-7 depending on the measurement phase. 7· After a few seconds the display will show "-0. 0-". [. . . ]