User manual HANNA INSTRUMENTS HI 96770C

[. . . ] Instruction Manual HI 96770C Silica High Range ISM www. hannainst. com This Instrument is in Compliance with the Directives 1 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. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. This instrument is in compliance with directives. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] DISPLAY ELEMENTS DESCRIPTION 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) Instrument status indicator appears during different phases of zero or reading measurement Icons displayed in this area are warning or action icons, signaling next operation The battery icon shows the charging level of the battery The hourglass appears when the instrument is performing an internal check up CAL: appears when the instrument operates in the calibration mode The month, day and date icons appear when a date is displayed The chronometer appears when the reaction timer is running Four digit main display Measuring units Four digit secondary display 8 ERRORS AND WARNINGS The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. a) on zero reading Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvet. Light Low: There is not enough light to perform a measurement. Please check the preparation of the zero cuvet. No Light: The instrument cannot adjust the light level. Please check that the samples does not contain any debris. b) on sample reading Inverted cuvets: The sample and the zero cuvet are inverted. Zero: A zero reading was not taken. As a general rule of thumb, they should be doubled at 10°C (50°F) and halved at 30°C (86°F). · In order to maximize accuracy, prior to a measurement follow the validation procedure to be sure that the instrument is properly calibrated. If necessary, calibrate the instrument. 11 START UP Prepare the instrument for measurement as follows: · Unpack the instrument by removing the cuvet holder protection from the instrument cuvet holder. · Place the battery in the instrument as described in the "BATTERY REPLACEMENT" chapter (see pag. 22). · Do not place the instrument in direct sun light. MEASUREMENT PROCEDURE Turn the meter on by pressing ON/OFF and follow instruction manual to perform either the MEASUREMENT, VALIDATION or CALIBRATION PROCEDURE. · Turn the meter on by pressing ON/OFF. The display briefly shows all tags on. · When the beeper sounds and the LCD displays dashes, the meter is ready. The blinking "ZERO" indicates that the instrument needs to be zeroed first. · Fill the cuvet with 10 mL of unreacted sample, up to the mark, and replace the cap. · Place the cuvet into the cuvet holder and ensure that the notch on the cap is positioned securely into the groove. 12 · Press ZERO/CFM and the instrument status indicator will appear, depending on the measurement phase. · After a few seconds, the display will show "-0. 0-". The meter is now zeroed and ready for measurement. · Remove the cuvet. · Add the content of one packet of HI 96770A-0 Silica HR reagent A and shake until complete dissolution. · Remove the cap and add the content of one packet of HI 96770B-0 Silica HR reagent B. until complete dissolution · Press and hold READ /TIMER for three seconds. Alternatively, wait for 10 minutes. 13 · Remove the cap. · Add the content of one packet of HI 96770C-0 Silica HR reagent C and shake vigorously until complete dissolution. · Replace the cuvet into the cuvet holder and ensure that the notch on the cap is positioned securely into the groove. · Wait for 2 minutes and then press /TIMER. READ /TIMER · The instrument status indicator will appear depending on the measurement phase. · 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. 14 INTERFERENCES · Iron (Fe2+ and Fe3+) interferes at high levels. · Phosphates does not interfere up to 50 mg/L PO43-. VALIDATION PROCEDURE Use the validation procedure to ensure that the instrument is properly calibrated. 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 test at room temperature: 18 to 25°C (64. 5 to 77. 0°F) · Turn the meter on by pressing ON/OFF. [. . . ] · If no calibration was performed, the factory calibration message, "F. CAL" will appear on the main display and the instrument returns to measurement mode after three seconds. FACTORY CALIBRATION RESET It is possible to restore the factory calibration. · Press GLP/ to enter GLP mode. · Press READ /TIMER to enter in the factory calibration restore screen. The instrument asks for confirmation before deleting the last calibration. · Press ZERO/CFM to restore the factory calibration or press GLP/ again to abort factory calibration restore. [. . . ]