User manual HANNA INSTRUMENTS HI 95701

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[. . . ] Instruction Manual HI 95701C Free Chlorine ISM MAN95701R2 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 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. SPECIFICATIONS Range Resolution Precision Typical EMC Deviation Light Source Light Detector Method Environment Battery Type Auto-Shut off or Dimensions Weight REQUIRED REAGENTS Code HI 93701-0 0. 00 to 5. 00 mg/L 0. 01 mg/L from 0. 00 to 3. 50 mg/L; 0. 10 mg/L above 3. 50 mg/L ±0. 02 mg/L @ 1. 00 mg/L ±0. 01 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Silicon Photocell Adaptation of the Standard Method 4500-Cl G. The reaction between free chlorine and the DPD reagent causes a pink 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 Free Chlorine Reagent Quantity/test 1 packet 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 1. 00 mg/L chlorine and a representative lot of reagent, an operator obtained with a single instrument a standard deviation of 0. 02 mg/L. 5 · 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 95701-11 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 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. In both cases "SIP" will blink during measurement. · The instrument directly displays concentration in mg/L of free chlorine on the Liquid Crystal Display. or INTERFERENCES · Alkalinity: above 1, 000 mg/L CaCO3 if present as bicarbonate (HCO3-, sample pH < 8. 3); above 250 mg/L CaCO3 if present as carbonate (CO32-, sample pH > 9. 0). In both cases, it will not reliably develop the full amount of color or it may rapidly fade (negative error). To resolve this, neutralize the sample with diluted HCl. May not reliably develop the full amount of color or it may rapidly fade (negative error). To resolve this, neutralize the sample with diluted NaOH. in case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately 2 minutes after adding the powder reagent. [. . . ] This indicates that the factory calibration is selected. 12 9 The flashing digits indicate that: 1) the month can be set 2) the day can be set "Storage": this prompt appears for 1 second at the end of the calibration procedure, to indicate that the calibration data has been stored. "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. [. . . ]

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