Instruction Manual HI 96770C Silica High Range ISM This Instrument is in Compliance with the Directives www.hannainst.
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. This instrument is in compliance with directives. TABLE OF CONTENTS PRELIMINARY EXAMINATION ................................................................................................
PRELIMINARY EXAMINATION Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please notify your Dealer.
GENERAL DESCRIPTION The HI 96770 is an auto diagnostic portable microprocessor meter that benefits from HANNA’s years of experience as a manufacturer of analytical instruments. It has the advanced optical system based on a Light Emitting Diode (LED) and a narrow band interference filter that allows most accurate and repeatable readings. All instruments are factory calibrated and the electronic and optical design minimizes the need of frequent calibration.
SPECIFICATIONS Dimensions Weight 0 to 200 mg/L 1 mg/L ±5 mg/L @ 100 mg/L ±1 mg/L Light Emitting Diode Silicon Photocell with narrow band interference filter @ 466 nm. Adaptation of the USEPA METHOD 370.1 for to drinking, surface and saline waters, domestic and industrial wastes and Standard Method 4500-SiO2 C. The reaction between silica and the reagents causes a yellow tint in the sample.
PRINCIPLE OF OPERATION Absorption of Light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices.
A microprocessor controlled LED emits radiation which is first optically conditioned and beamed to the sample contained in the cuvet. The optical path is fixed by the diameter of the cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity Io or I. The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range.
KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. • ZERO/CFM: to zero the meter prior to measurement, to confirm edited values or to confirm factory calibration restore. • READ /TIMER: this is a multi-functional key. In measurement mode, press to make a measurement, or press and hold for three seconds to start a pre-programmed countdown. In GLP mode press to view the next screen. • CAL CHECK: this is a bi-functional key.
ERRORS AND WARNINGS The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. The beeper is playing a beep on errors. 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.
Over Range: A flashing value of the maximum concentration indicates an over range condition. The concentration of the sample is beyond the programmed range: dilute the sample and re-run the test. c) during calibration procedure Standard Low: The standard reading is out of range. Standard High: The standard reading is out of range. d) other errors and warnings Cap error: the cuvet is not inserted correctly and an excess ambient light is reaching the detector.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy. • For a correct filling of the cuvet: the liquid in the cuvet forms a concavity on the top; the bottom of this concavity must be at the same level of the 10 mL mark. • Proper use of the powder reagent packet: (a) use scissors to open the powder packet; (b) push the edges of the packet to form a spout; (c) pour out the content of the packet.
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). • Place the instrument on a flat table. • 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.
• 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. Replace the cap and shake vigorously until complete dissolution dissolution.
• 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 READ /TIMER /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.
INTERFERENCES • Iron (Fe2+ and Fe3+) interferes at high levels. • Sulfide (S2-) 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 CHECK™ Standards, otherwise erroneous results will be obtained.
• After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for validation. • Remove the cuvet. • Place the CAL CHECK™ Standard HI 96770-11 Cuvet B into the cuvet holder and ensure that the notch on the cap is positioned securely into the groove. • Press CAL CHECK and the instrument status indicator together with “CAL CHECK” will appear on the display, depending on the measurement phase. • The display will show the validation standard value.
CALIBRATION PROCEDURE Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or ON/OFF. Warning: Do not calibrate the instrument with standard solutions other than the HANNA CAL CHECK™ 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. • When the beeper sounds and the LCD displays dashes, the meter is ready.
• After a few seconds the display will show “-0.0-”. The meter is now zeroed and ready for calibration. • Remove the cuvet. • Place the CAL CHECK™ Standard HI 96770-11 Cuvet B into the cuvet holder and ensure that the notch on the cap is positioned securely into the groove. • Press READ /TIMER and the instrument status indicator will appear, depending on the measurement phase. • After measurement the instrument will show for three seconds the Cal Check Standard value.
DATE INPUT • Press GLP/ to edit the desired year (2000-2099). If the key is kept pressed, the year number is automatically increased. or • When the correct year has been set, press ZERO/CFM or READ /TIMER to confirm. Now the display will show the month blinking. • Press GLP/ to edit the desired month (01-12). If the key is kept pressed, the month number is automatically increased. or • When the correct month has been set, press ZERO/CFM or READ /TIMER to confirm.
GLP In the GLP mode, the last user calibration date can be consulted and the factory calibration can be restored. LAST CALIBRATION DATE To display the calibration date: • Press GLP/ to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display. • 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.
• The instrument briefly notifies “done” when restores factory calibration and returns to measurement mode. BATTERY MANAGEMENT To save battery, the instrument shuts down after 10 minutes of non-use in measurement mode and after 1 hour of non-use in calibration mode. If a valid measurement was displayed before auto-shut off, the value is displayed when the instrument is switched on. The blinking “ZERO” means that a new zero has to be performed.
BATTERY REPLACEMENT To replace the instrument’s battery, follow the steps: • Turn the instrument off by pressing ON/OFF. • Turn the instrument upside down and remove the battery cover by turning it counterclockwise. • Extract the battery from its location and replace it with a fresh one. • Insert back the battery cover and turn it clockwise to close.
WARRANTY HI 96770 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact your dealer. If under warranty, report the model number, date of purchase, serial number and the nature of the failure.
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