User manual HANNA INSTRUMENTS HI 95717C

[. . . ] Instruction Manual HI 95717C Phosphate High Range ISM MAN95717R2 08/06 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 20 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. 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. [. . . ] · Place the CAL CHECKTM Standard Cuvet A into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will blink on the display. · After a few seconds the display will show "-0. 0-". The meter is now zeroed and ready for calibration. · Place the CAL CHECKTM Standard HI 95717-11 Cuvet B into the holder and ensure that the notch on the cap is positioned securely into the groove. SPECIFICATIONS Range Resolution Precision Typical EMC Deviation Light Source Light Detector Method 0. 0 to 30. 0 mg/L 0. 1 mg/L ±0. 5 mg/L @ 12. 0 mg/L ±0. 2 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Silicon Photocell Amino Acid Method, adapted from Standard Methods for the Examination of Water and Wastewater. The reaction between phosphate and the reagents causes a blue 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. ). Description Phosphate HR Reagent A Phosphate HR Reagent B Quantity/test 10 drops 1 packet Environment Battery Type Auto-Shut off or Dimensions Weight REQUIRED REAGENTS Code HI 93717A-0 HI 93717B-0 PRECISION AND ACCURACY Precision is how closely repeated measurements agree with each other. Precision is usually expressed as standard deviation (SD). 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 12. 00 mg/L phosphate and a representative lot of reagents, an operator obtained with a single instrument a standard deviation of 0. 5 mg/L. 5 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 pure absorption occurs, the fraction of light absorbed depends both on the optical path length through the matter and on the physical-chemical characteristics of the substance according to the LambertBeer Law: -log I/Io = c d or A = c d Where: -log I/Io Io I c d = = = = = = Absorbance (A) intensity of incident light beam intensity of light beam after absorption molar extinction coefficient at wavelength molar concentration of the substance optical path through the substance VALIDATION PROCEDURE Use the validation procedure to ensure that the instrument is properly calibrated. Replace the cap and shake gently until dissolution is complete. · 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. or A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvet. The optical path is fixed by the diameter of the cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity Io or I. [. . . ] "No Light": the instrument cannot adjust the light level. Please check that the sample does not contain any debris. "Light Low": there is not enough light to perform a measurement. Please check the preparation of the zero cuvet. [. . . ]