User manual HANNA INSTRUMENTS HI 96714

[. . . ] INSTRUCTION MANUAL HI 96714 Cyanide 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. [. . . ] The chronometer appears when the reaction timer is running 7. The month, day and date icons appear when a date is displayed 8. Four digit secondary display Standard High: The standard reading is higher than expected. 10 OTHER ERRORS AND WARNINGS: Cap error: Appears when external light enters in the analysis cell. Assure that the cuvette cap is present. 11 12·Press and hold READ/ /TIMER for three 12 seconds and the display will show the countdown prior to measurement or alternatively wait for 25 minutes and press READ/ /TIMER. An audible "beep" indicates the end of countdown period. In all cases the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. Note: Shake the cuvette 4 or 5 times vigorously during the first 20 minutes of the timed reading. Accuracy is not affected by undissolved reagent powder. 13·At the end of measurement, the instrument 13 directly displays concentration in mg/L of cyanide on the LCD. To convert the reading to mg/L of Potassium Cyanide (KCN), multiply by the factor of 2. 5. INTERFERENCES: or 7· Place the CAL CHECKTM Standard HI 96714-11 Cuvette B into the holder and ensure that the notch on the cap is positioned securely into the groove. 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. 7 8 9 Interference may be caused by large amounts of turbidity that will cause high readings. Oxidizing (like chlorine) or reducing agents (such as sulfide or sulfur dioxide) are known to interfere with the measurement. Samples with high pH values should be adjusted to approximately pH 7 before testing. CAUTION: Cyanide, its solution and hydrogen cyanide liberated by acids are very poisonous. 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 1· Turn the meter on by pressing ON/OFF. [. . . ] 15·When the correct month has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the day blinking. 16·Press GLP/ to edit the desired day (01-31). If the key is kept pressed, the day number is automatically increased. [. . . ]