User manual HANNA INSTRUMENTS HI 93703-11

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Manual abstract: user guide HANNA INSTRUMENTS HI 93703-11

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[. . . ] Instruction Manual HI 93703-11 Portable Microprocessor Turbidity Meter with RS232 Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument, as well as a more precise idea of its versatility. This instrument is in compliance with the directives EN 50081-1 and EN 50082-1. TABLE OF CONTENTS Preliminary Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] To reactivate the display, simply press the ON/OFF key. MEASUREMENT PROCEDURE: HI 93703-11 CLR ON OFF HI93703 Range Resolution Accuracy 0. 00 to 50. 00 FTU * 50 to 1000 FTU * 0. 01 and 1 FTU * ±0. 5 FTU* ±5% of reading (whichever greater) ±2% Full Scale High Emission Infrared LED Life of the instrument Silicon Photocell 4 x 1. 5V AA alkaline batteries 60 hours or 900 measurements After 5 minutes 0 to 50°C (32 to 122°F); 0 to 95% RH (non-condensing) 220 x 82 x 66 mm (8. 7 x 3. 2 x 2. 6") 510 g (18 oz. ) EMC Typical Deviation Light Source Light Source Life Light Detector Power Source Battery Life Auto-Shut off Operating Conditions Dimensions Weight · Turn the meter on by pressing the ON/OFF key. VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT · The meter will carry out a self-test displaying a full set of figures. · The meter will carry out a battery test showing in percentage the battery life left. · When the LCD displays "----" the meter is ready to measure. LOG 188 DATE % TIME LOBAT 98 ba % · Fill a clean cuvet up to one quarter inch (0. 5 cm) from its rim with the thoroughly agitated sample. · Allow sufficient time for bubbles to escape before securing the cap. Note: do not overtighten the cap. * 1 FTU = 1 NTU 1/4" 0. 5 cm 7 8 NOTE: Wipe the cuvet thoroughly with a lintfree tissue (HI 93703-70) before inserting into the measurement cell. The cuvet must be completely free of fingerprints and other oil or dirt, particularly in the area where the light goes through (approx. · Place the cuvet into the cell and check that the notch on the cap is positioned securely into the groove. · Even though HI93703-11 covers a very wide range of turbidity values, for very accurate measurements of samples exceeding 40 FTU *, Standard Methods require dilution. In such cases, the correct amount of HI 93703-0 or turbidity-free water to be added to the sample can be calculated as follows: Vos = 3000 / T where: Vos = volume of sample (mL) to be combined with HI 93703-0 to obtain the final volume of 100 mL. T = HI 93703 reading (exceeding 40FTU*) E. g. : HI 93703 reading = 200 FTU * 3000 / 200 = 15 mL (Vos) 15 mL (Vos)+85 mL (HI 93703-0) = 100 mL · The mark on the cuvet cap should point towards the LCD. At this point, take a sample of this solution and measure its turbidity. The correct turbidity value of the original sample will be: Tn x 100 mL / Vos = Ta · Press the READ key and the LCD will display a blinking "SIP" (Sampling in Process). The turbidity value will appear after approx. 20 seconds. HI 93703-11 CLR ON OFF VIEW STO DATE READ where: Tn = new HI 93703 reading Ta = actual turbidity value of the original sample E. g. If Tn = 27 FTU * Ta = 27 FTU *x100 mL / 15 mL = 180 FTU * CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT 51 NOTE: Any sample taken above 1000 FTU will show out of range by blinking "1000". 9 * 1 FTU = 1 NTU 10 LOG-ON-DEMAND: · After taking a read- HI 93703-11 ing, press the STO button. The last sample read will be stored in memory. The display will also show on the bottom right corner the reference number of the stored sample. CLR ON OFF VIEWING LOGGED DATA: · Press the ALT & VIEW buttons together. The last sample will be displayed. HI 93703-11 CLR ON OFF VIEW STO DATE READ VIEW STO CAL GLP CAL DATE GLP READ LOGGING MICROPROCESSOR TURBIDITY METER LOGGING MICROPROCESSOR TURBIDITY METER LOGGING MICROPROCESSOR TURBIDITY METER ALT ALT HI 93703-11 NOTE: When the maximum number of samples has been reached (199), the LCD display will show "FULL". This is a warning that you will be overwriting the oldest sample recorded. To store the current sample, press the STO button again and this will overwrite the oldest sample in the memory. All samples are shifted (reference numbers reduced by one). Sample number one remains the oldest sample. FULL · Press the right arrow to scroll between turbidity value, date and time of the sample. CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT HI 93703-11 · Press the UP/DOWN arrows to view the samples and use the right arrow to scroll the date and time . CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT CLEARING LOGGED DATA: HI 93703-11 · Press ALT & VIEW again to exit this mode. VIEWING AND SETTING DATE AND TIME: VIEW STO DATE READ · Press the ALT & CLR buttons together. [. . . ] Replace all four batteries at this point. 0 % LO BAT When the batteries are too weak to perform measurements, the message 0% LO BAT appears for a few seconds, and then the meter will automatically switch itself off. At this point, the batteries must be replaced. 20 Battery replacement must only take place in a non hazardous area using AA type alkaline batteries. To install or replace the batteries, turn the unit off and unscrew the 2 screws located on the back of the battery cover. Remove the battery cover exposing the battery compartment. [. . . ]

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