Hanna Instruments HI 95762C Instruction Manual

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Hanna Instruments HI 95762C Instruction Manual Manual pdf 5 page image

5Range 0.000 to 0.500 mg/LResolution 0.001 mg/LPrecision ±0.004 mg/L @ 0.200 mg/LTypical EMC Deviation ±0.001 mg/LLight Source Tungsten lamp with narrow band interference filter @ 525 nmLight Detector Silicon PhotocellMethod Adaptation of the Standard Method 4500-Cl G. The reactionbetween free chlorine and the DPD reagent causes a pink tint inthe sample.Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensingBattery Type 1 x 9 voltAuto-Shut off After 10' of non-use in measurement mode;after 1 hour of non-use in calibration mode.Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")Weight 290 g (10 oz.).REQUIRED REAGENTSCode Description Quantity/testHI 95762-0 Free Chlorine Reagent 1 packetPrecision is how closely repeatedmeasurements agree with each other.Precision is usually expressed as standarddeviation (SD).Accuracy is defined as the nearness of atest result to the true value.Although good precision suggests goodaccuracy, precise results can be inaccurate.The figure explains these definitions.In a laboratory using a standard solutionof 0.200 mg/L chlorine and arepresentative lot of reagent, an operatorobtained with a single instrument astandard deviation of 0.004 mg/L.SPECIFICATIONSPRECISION AND ACCURACY16CALIBRATION PROCEDURE• Turn the meter on by pressing ON/OFF.• When the LCD displays “762”, it is ready.• Enter the calibration mode by holding CAL CHECKfor three seconds.• The date of the last calibration appears (e.g.:month “01”, day “08”). “F.CAL” means thatthe factory calibration is selected.Note: at this point it is possible to reset theinstrument to restore FACTORY CALIBRATION,see instructions page 18.• Place the CAL CHECK™ Standard Cuvet A intothe holder and ensure that the notch on the capis 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.• Remove the cuvet.• Place the CAL CHECK™ Standard HI 95762-11Cuvet B into the holder and ensure that thenotch on the cap is positioned securely into thegroove.orCALIBRATION PROCEDURENote: 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 HannaCAL CHECK™ Standards, otherwise erroneous results will be obtained.