User manual HANNA INSTRUMENTS HI 95729

[. . . ] Instruction Manual HI 95729C Fluoride Low Range ISM MAN95729CR2 10/04 w w w . h a n n a i n s t . c o m www. hannainst. com This Instrument is in Compliance with CE Directives 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. CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. [. . . ] The reaction between fluoride and the liquid reagent causes a red tint in the sample. 0 to 50°C (32 to 122°F); max 95% RH non-condensing 1 x 9 volt After 10' of non-use in measurement mode; after 1 hour of non-use in calibration mode. 180 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") 290 g (10 oz. ). Environment Battery Type Auto-Shut off or Dimensions Weight REQUIRED REAGENTS Code HI 93729-0 Description Fluoride Reagent Quantity/test 4 mL (2 mL x 2) PRECISION AND ACCURACY Precision is how closely repeated measurements agree with each other. Accuracy is defined as the nearness of a test result to the true value. Although good precision suggests good accuracy, precise results can be inaccurate. In a laboratory using a standard solution of 1. 00 mg/L fluoride and a representative lot of reagents, an operator obtained with a single instrument a standard deviation of 0. 03 mg/L. 5 · Press ZERO and "SIP" will blink on the display. · Place the CAL CHECKTM Standard HI 95729-11 Cuvet B into the holder and ensure that the notch on the cap is positioned securely into the groove. 16 PRINCIPLE OF OPERATION 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. If the value found is out of specifications, please check that the cuvets are free of fingerprints, oil or dirt and repeat validation. If results are still found out of specifications then recalibrate the instrument. 15 6 · Replace the cap to the cuvet, and shake gently a couple of times. · Place the cuvet with the reacted sample into the holder and ensure that the notch on the cap is positioned securely into the groove. · Hold READ/TIMER for three seconds and the display will show the countdown or, alternatively, wait for two minutes. · Press READ/TIMER and "SIP" will blink during measurement. · The instrument directly displays concentration in mg/L (ppm) of fluoride on the Liquid Crystal Display. Note: For wastewater or seawater samples, before performing measurements, distillation is required. A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity o or The photoelectric cell collects the radiation that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range. The microprocessor uses this potential to convert the incoming value into the desired measuring unit and to display it on the LCD. The measurement process is carried out in two phases: first the meter is zeroed and then the actual measurement is performed. The cuvet has a very important role because it is an optical element and thus requires particular attention. It is important that both the measurement and the calibration (zeroing) cuvets are optically identical to provide the same measurement conditions. It is necessary that the surface of the cuvet is clean and not scratched. [. . . ] "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. 9 · Add 2 mL of HI 93729-0 Fluoride Reagent to the cuvet by use of the 2000 µL automatic pipette. [. . . ]