Instruction Manual HI 95706C Phosphorus ISM MAN95706R2 06/06 w w w . h a n n 20 a i n s t . c o m This Instrument is in Compliance with the CE 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 FACTORY CALIBRATION RESET It is possible to restore factory calibration: • Enter the calibration mode by holding CAL CHECK for three seconds. Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occured during shipment, please notify your Dealer.
GENERAL DESCRIPTION • Press READ/TIMER and “SIP” will blink during measurement. The HI 95706 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 special tungsten lamp and a narrow band interference filter that allows most accurate and repeatable readings.
CALIBRATION PROCEDURE SPECIFICATIONS Dimensions Weight 0.0 to 15.0 mg/L 0.1 mg/L ±0.2 mg/L @ 6.0 mg/L ±0.2 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Silicon Photocell Amino Acid Method, adapted from Standard Method for the Examination of Water and Wastewater. The reaction between phosphorus and the reagents causes a blue tint in the sample.
PRINCIPLE OF OPERATION VALIDATION PROCEDURE 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.
• Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. • Hold READ/TIMER for three seconds. The display will show the countdown prior to measurement. Alternatively, wait for 5 minutes and just press READ/TIMER. In both cases “SIP” will blink during measurement. • The instrument directly displays concentration in mg/L of phosphorus on the Liquid Crystal Display. INTERFERENCES • Calcium (Ca2+): above 10,000 mg/L as CaCO3.
KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. • ZERO: to zero the meter prior to measurement. • READ/TIMER: this is a bi-functional key, just press for making a measurement, or hold the key for 3 seconds to start a pre-programmed countdown prior to measurement. • CAL CHECK: this bi-functional key allows to perform validation of the instrument just pressing the CAL CHECK key, or hold the key for 3 seconds to enter the calibration mode.
• Proper use of the dropper: (a) to get good reproducible results, tap the dropper on the table for several times and wipe the outside of the dropper tip with a cloth. (b) always keep the dropper bottle in a vertical position while dosing the reagent. GUIDE TO DISPLAY CODES This prompt appears for 1 second each time the instrument is turned on. This indicates that the meter is in a ready state and zeroing can be performed. Sampling in Progress.
The flashing digits indicate that: 1) the month can be set 2) the day can be set “Storage”: this prompt appears for 1 second at the end of the calibration procedure, to indicate that the calibration data has been stored. “Error”: the concentration of the calibration solution used is not correct. Repeat the calibration procedure with the right standard solution, and verify it is not expired. If the calibration procedure fails again, contact your dealer or the nearest Hanna Customer Service Center.
