Instruction Manual HI 98713 ISO Portable Turbidimeter w w w. h a n n a i n s t .
Dear Customer, Thank you for choosing a Hanna Instruments product. This manual will provide you with the necessary information for correct use of the instrument. Please read this instruction manual carefully before using the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com or see the back side of this manual for our worldwide sales and technical service contacts. directives.
GENERAL DESCRIPTION GENERAL DESCRIPTION TAG IDENTIFICATION SYSTEM HI 98713 is a high accuracy ISO compliant portable turbidimeter that benefits from Hanna’s years of experience as manufacturer of analytical instruments. The HI 98713 meets and exceeds the requirements of the ISO 7027 for water quality. The instrument is specially designed for water quality measurements, providing a reliable and accurate reading on low turbidity values. The HI 98713 instrument measures the turbidity of a sample in the 0.
PRINCIPLE OF OPERATION MEASUREMENT UNITS Turbidity of the water is an optical property that causes light to be scattered and absorbed, rather than transmitted. The scattering of the light that passes through a liquid is primarily caused by the suspended solids. The higher the turbidity, the greater the amount of scattered light. Because even the molecules in a very pure fluid scatter light to a certain degree, no solution will have zero turbidity.
FUNCTIONAL DESCRIPTION INSTRUMENT DESCRIPTION 8) ON/OFF, press to turn the instrument ON/OFF. If no key is pressed for more than 15 minutes, the instrument automatically shuts off. 9) GLP , press to enter/exit GLP feature. In SETUP it is used to increase the set values. In Log Recall it is used to select a newer record (scroll up). 10) AVG , press to set the average reading mode ON/OFF. In SETUP it is used to decrease the set values. In Log Recall it is used to select an older record (scroll down).
DISPLAY DESCRIPTION SPECIFICATIONS Range Range Selection Resolution 1) Battery icon. When it is ON, it shows that the instrument works on battery. When blinking, the batteries are almost empty and need to be replaced. 2) Wait icon. It is displayed when the instrument performs an internal checkup. 3) Measurement icon. The icon shows the measuring scheme of the instrument. 4) LED icon. The LED icon is shown when the LED is turned on. 5) Four digit main display.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT HI 98713 is a highly accurate turbidimeter. To meet the instrument performance and fully benefit of its properties it is very important that the analyst perform accurate, precise and repeatable readings using proper measurement techniques. Special care must be taken during sample preparation and handling. The instructions listed below should be carefully followed during measurement and calibration to ensure best accuracy.
In order to index a cuvet follow the next steps: • Fill the cuvet with high quality water (<0.1 FNU) up to the line. • Clean and oil the cuvet as described before. MATCHING MULTIPLE CUVETS Precise measurements require the use of a single cuvet. If it is not possible, the cuvet selection and matching must be performed before taking measurements. In order to match multiple cuvets follow the next steps: • Fill some cuvets with high quality water (<0.1 FNU) up to the line.
• Open the instrument lid, slightly rotate the cuvet and take a new reading. • Repeat the last step for the second cuvet until the reading is within 0.01 FNU of the value obtained for the first cuvet. • Alternatively, keep READ pressed and, after the first value is displayed, open the lid and start rotating the cuvet until the displayed value matches the first cuvet. • Mark this position on the second cuvet with a water resistant pencil. • Follow the same procedure for all the necessary cuvets.
HEATING THE SAMPLE Use of heat to remove air bubbles, although very effective in some cases, should be handled with care because it can alter the turbidity of the sample. When heating a sample, the volatile components from the sample can vaporize, the suspended components can dissolve or the sample characteristics can change. Therefore, the heating procedure should be used with extreme care. The best way is to use a warm water bath and immerse the cuvet with sample into the bath.
NORMAL MEASUREMENT This type of measurement can be used for regular measurements, when the sample is stable and normal accuracy is required. In normal measurement mode, the led is ON for a minimum period of time (about 7 seconds), saving the battery life. Normal measurement takes about 10 seconds. If normal measurement is selected, the “AVG” tag will not be displayed. • Press READ to start the measurement.
CALIBRATION PROCEDURE HI 98713 has a powerful calibration function that compensates for LED aging or changing. The calibration can be done using the suplied calibration solutions or user prepared standards. HI 98713 turbidimeter is supplied with 4 AMCO standards: <0.1 FNU, 15 FNU, 100 FNU and 750 FNU. The Hanna standards are specially designed for this instrument. The turbidity standards have a shelf life and should not be used after the expiration date. Alternatively, formazin standards can be used.
• At the end of the measurement, the third calibration point (100 FNU) is displayed on the primary LCD, “CAL P.3” on the secondary LCD, and “READ” tag will blink. • Close the lid and press READ . The display will show blinking dashes and the icons for cuvet, detectors and LED will appear during measurement. • At this moment it is possible to exit calibration by pressing CAL. The instrument will memorize the two-point calibration data and will return to measurement mode.
LOGGING HI 98713 has a log space for up to 200 records. With each measurement, the date, time and tag ID is stored. In this way, each record is fully characterized and can be easily analyzed when downloading data on the PC application (HI 92000). LOGGING The log function is active after a valid measurement is obtained (no errors). • To log a value, press LOG/CFM when the measurement result is displayed. The instrument asks to READ TAG for identification of the sampling location.
• The instrument asks for confirmation and if LOG/CFM is pressed, all records are deleted. To abort the delete function, press READ instead of LOG/CFM. • Measurement date in YYYY.MM.DD format. • After all records are deleted, dashes are displayed for one second and the instrument returns to idle mode. • Measurement time in hh:mm format. • Delete the last record panel (only for last record). GOOD LABORATORY PRACTICE (GLP) The GLP feature allows the user to view last calibration data.
SETUP • Third calibration point (if available). Setup mode allows viewing and modifying the instrument parameters. The blinking “CAL” tag during setup mode suggest to press CAL for parameters editing. • To enter/exit SETUP, press SETUP/DEL. • Fourth calibration point (if available). • To select the parameter to be edit, press UP or DOWN keys until the desired panel is displayed. • Delete calibration panel.
• Press LOG/CFM to save the change. The new selected option will be displayed on the LCD. Alternatively, press CAL to exit without saving the changes. SET THE DATE The HI 98713 turbidimeter has a built-in real time clock (RTC). The RTC time is used to generate a unique time stamp for each recorded value and to automatically store the last calibration date. The current time can be displayed on the LCD when the instrument is in idle mode. • To set the current date, press CAL when set date panel is displayed.
• Press LOG/CFM to save the change. The new instrument ID will be displayed. Alternatively, press CAL to exit without saving the changes. SET BAUD RATE The HI 98713 has a RS232 and a USB link. When the USB connection is used, the RS232 connection becomes inactive. To successfully communicate with the PC, the same baud rate must be selected on the instrument and on the PC application. The available baud rates are 1200, 2400, 4800 and 9600.
LED REPLACEMENT In case of LED failure, the defective LED can be easily replaced. When the LED is broken, the instrument displays “no L” error message. BATTERIES REPLACEMENT To replace the batteries follow the next steps: • Press ON/OFF to turn OFF the instrument. • Open the batteries cover by pressing the locking clip. To replace the LED follow the next steps: • Remove the battery lid. • Unscrew the LED connection using a screwdriver.
PC INTERFACE ACCESSORIES To fully use the instrument tag identification system function, the measured data has to be downloaded to a computer. The instrument can use RS232 or USB connection to communicate with the PC. When using the RS232 protocol, simply connect a HI 920011 serial cable between the instrument and the computer. To use the USB protocol, simply connect a regular USB cable between instrument and PC. In both cases, the PC must run the HI 92000 application for successful data transfer.
SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (210) 4584.2941 • Fax (210) 4584.2942 Japan: Tel. (03) 3258.9565 • Fax (03) 3258.9567 Korea: Tel. (02) 2278.5147 • Fax (02) 2264.1729 Malaysia: Tel. (603) 5638.9940 • Fax (603) 5638.9829 Singapore: Tel. 6296.
