Instruction Manual HI 95707C Nitrite Low Range ISM w w . h a n n 20 a i n s t . c o m MAN95707CR3 06/06 w 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 occurred during shipment, please notify your Dealer.
GENERAL DESCRIPTION • Press READ/TIMER and “SIP” will blink during measurement. The HI 95707 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 Note: it is possible to interrupt calibration procedure at any time by pressing ON/OFF. Warning: do not validate or 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).
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.
• Hold READ/TIMER for three seconds. The display will show the countdown prior to measurement. Alternatively, wait for 15 minutes and just press READ/TIMER. In both cases “SIP” will blink during measurement. or • The instrument directly displays concentration in mg/L of nitrogen-nitrite (NO2–-N) on the Liquid Crystal Display. • To convert the NO2–-N concentration to the nitrite ion concentration (NO2–), multiply the reading by factor of 3.29.
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.
• It is important that the sample does not contain any debris. This would corrupt the reading. • In order to avoid reagent leaking and to obtain more accurate measurements, it is recommended to close the cuvet first with the supplied HDPE plastic stopper and then with the black cap. • Each time the cuvet is used, the cap must be tightened to the same degree. • Whenever the cuvet is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt.
The flashing digits indicate that: 1) the month can be set 2) the day can be set Under range. A blinking "0.000" indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvet for reference (zero) and measurement. 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.
