User manual HANNA INSTRUMENTS HI 96723

[. . . ] 0 to 50°C (32 to 122°F); max 95% RH non-condensing 1 x 9 volt After 10' of non-use in measurement mode; after 1 hour of non-use in calibration mode; with last reading reminder. 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 prior to measurement. [. . . ] 10 OTHER ERRORS AND WARNINGS: Cap error: Appears when external light enters in the analysis cell. Assure that the cuvette cap is present. Alternatively, wait for 6 minutes and just press READ/ /TIMER. In both cases, the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 11·The instrument directly displays concentration in µg/L of chromium VI on the Liquid Crystal Display. or 11 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 INTERFERENCES Interference may be caused by: Vanadium above 1 ppm: wait 10' prior to reading the sample to remove vanadium interference. Iron above 1 ppm Mercurous and mercuric ions, slight inhibition of the reaction. CALIBRATION 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. The blinking "ZERO" asks for instrument zeroing. Calibration 3 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. 4 VALIDATION 1· Turn the meter on by pressing ON/OFF. 2· When the beeper sounds briefly and the LCD displays dashes, the meter is ready. 3 Validation 4· Place the CAL CHECKTM Standard HI 96723-11 Cuvette A into the cuvette 5-6 holder and ensure that the notch on the cap is positioned securely into the groove. 5· Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 6· After a few seconds the display will show "-0. 0-". 8· Place the CAL CHECKTM Standard HI 96723-11 Cuvette B into the holder and ensure that the notch on the cap is positioned securely into the groove. 9· Press READ/ /TIMER and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 10·The instrument will show for three seconds the CAL CHECKTM standard value. 3· Place the CAL CHECKTM Standard HI 96723-11 Cuvette A into the holder and ensure that the notch on the cap is positioned securely into the groove. 4-5 4· Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 5· After a few seconds the display will show "-0. 0-". 7· Place the CAL CHECKTM Standard HI 96723-11 Cuvette B into the holder and ensure that the notch on the cap is positioned securely into the groove. [. . . ] If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Recommendations for Users Before using these products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. [. . . ]