User manual HANNA INSTRUMENTS HI 95747

[. . . ] The blinking "BAT" indicates that the battery voltage is getting low and the battery needs to be replaced. "-bA-", the battery is dead and must be replaced. Once this indication is displayed, the meter will lock up. "Conf", the meter has lost its configuration. [. . . ] 2· When the LCD displays "747", it is ready. 3· Fill the cuvet with 10 mL of unreacted sample, up to the mark, and replace the cap. 4· Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. 5· Press ZERO and "SIP" will blink on the display. 6· After a few seconds the display will show "-0. 0-". The meter is now zeroed and ready for measurement. 7· Remove the cuvet and add the content of one packet of HI 95747-0 Copper Low Range reagent. 8· Replace the cap and shake gently for 15 seconds. 9· Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. 10·Hold READ/TIMER for three seconds. The display will show the countdown prior to measurement. Alternatively, wait for 45 seconds and just press READ/TIMER. In both cases "SIP" will blink during measurement. 11·The instrument directly displays concentration in mg/L of copper on the Liquid Crystal Display. INTERFERENCES · Cyanide · Silver · For strongly buffered alkaline or acidic samples, pH should be adjusted between 6 and 8 before addition of reagent. · To avoid interferences due to fingerprints, oil or dirt it is very important that the cuvet is wiped clean prior to insertion in the cuvet holder. Replacement of scratched cuvets is strongly recommended. 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 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 ON/OFF. 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). 1· Turn the meter on by pressing ON/OFF. 2· When the LCD displays "747", it is ready. 3· Enter the calibration mode by holding CAL CHECK key for three seconds. [. . . ] For accurate validation and calibration results, please perform tests at room temperature (18 to 25°C; 64. 5 to 77. 0°F). Use the optional CAL CHECKTM cuvets (see "Accessories") to validate or calibrate instruments. Factory calibration reset It is possible to restore factory calibration: 1· Enter the calibration mode by holding CAL CHECK key for three seconds. The display will show for 2 seconds "F. CAL" and the parameter code "747" appears. The factory calibration is automatically restored and the instrument is ready for measurement. [. . . ]