User manual HANNA INSTRUMENTS HI 95711

[. . . ] Instruction Manual HI 95711C Free & Total Chlorine ISM MAN95711R3 05/06 w w w . h a n n a i n s t . c o m www. hannainst. com This Instrument is in Compliance with the CE Directives 24 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. USER NOTES Date Parameter Code Validation Value (mg/L) Passed yes not Calibration yes not TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The display will show for 2 seconds "F. CAL" and the parameter code ("701" or "711") appears. The factory calibration is automatically restored and the instrument is ready for measurement. or Therefore, the concentration "c" can be calculated from the absorbance of the substance as the other factors are known. Photometric chemical analysis is based on the possibility to develop an absorbing compound from a specific chemical reaction between sample and reagents. Given that the absorption of a compound strictly depends on the wavelength of the incident light beam, a narrow spectral bandwidth should be selected as well as a proper central wavelength to optimize measurements. The optical system of Hanna's HI 95 series colorimeters is based on special subminiature tungsten lamps and narrow-band interference filters to guarantee both high performance and reliable results. Block diagram (optical layout) 6 19 · Press READ/TIMER and "SIP" will blink on the display. · The instrument will show for three seconds the CAL CHECKTM standard value. Then the date of last calibration (e. g. : "01. 08") appears on the display, or "01. 01" if the factory calibration was selected. In both cases the number of the month is blinking, ready for date input. Note: if display will show "ERR" the calibration procedure failed. Furthermore, in order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvet to prevent any contamination. FUNCTIONAL DESCRIPTION 1) 2) 3) 4) 5) 6) 7) Liquid Crystal Display Cuvet Holder Cuvet alignment indicator ON/OFF key ZERO/SET key READ/TIMER key CAL CHECK key or 18 7 KEYPAD DESCRIPTION · ON/OFF: to turn the meter on and off. · ZERO/SET: this is a bi-functional key: press to zero the meter prior to measurement, or hold the key for 3 seconds to select the desired parameter (Free or Total Chlorine). · 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. OPERATING MODES · Measurement mode: default operation mode, enables both validation and measurement. · Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds (the "CAL" icon appears), it enables calibration of the instrument. DISPLAY ELEMENTS DESCRIPTION CALIBRATION PROCEDURE 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 CHECKTM Standards, otherwise erroneous results will be obtained. CALIBRATION PROCEDURE · Select the parameter code for free chlorine "701" ot total chlorine "711" by holding ZERO/SET (see pag. · Enter the calibration mode by holding CAL CHECK for three seconds. · The date of the last calibration appears (e. g. : month "01", day "08"). Note: at this point it is possible to reset the instrument to restore FACTORY CALIBRATION, see instructions page 19. · Place the CAL CHECKTM Standard Cuvet A into the holder and ensure that the notch on the cap is positioned securely into the groove. or 1) 2) 3) 4) four digit main display area. [. . . ] · Press ZERO/SET and "SIP" will blink on the display. · Add the content of one packet of the specific test reagent, for: Free Chlorine: Total Chlorine: 1 packet of 1 packet of or HI 93701-0 HI 93711-0 · Replace the cap and shake gently for 20 seconds (or 2 minutes in case of seawater analysis) · Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. Under range. A blinking "0. 00" 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. [. . . ]