Hanna Instruments HI 95721C Instruction Manual

Contents

5Range 0.00 to 5.00 mg/LResolution 0.01 mg/LPrecision ±0.01 mg/L @ 1.50 mg/LTypical EMC Deviation ±0.01 mg/LLight Source Tungsten lamp with narrow band interference filter @ 525 nmLight Detector Silicon PhotocellMethod Adaptation of the USEPA method 315B and Standard Method3500-Fe B. The reaction between iron and the phenanthrolinereagent causes an orange tint in the 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 93721-0 Iron HR Reagent 1 packetPrecision is how closely repeated measurementsagree with each other. Precision is usuallyexpressed as standard deviation (SD).Accuracy is defined as the nearness of a testresult to the true value.Although good precision suggests good accuracy,precise results can be inaccurate. The figureexplains these definitions.In a laboratory using a standard solution of 1.50mg/L Iron and a representative lot of reagent, anoperator obtained with a single instrument astandard deviation of 0.01 mg/L.SPECIFICATIONSPRECISION AND ACCURACY16CALIBRATION PROCEDURE• Turn the meter on by pressing ON/OFF.• When the LCD displays “721”, 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 that thefactory calibration is selected.Note: at this point it is possible to reset theinstrument to restore FACTORY CALIBRATION, seeinstructions page 18.• Place the CAL CHECK™ Standard Cuvet A intothe holder and ensure that the notch on the cap ispositioned 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 95721-11Cuvet B into the holder and ensure that the notchon the cap is positioned securely into the groove.Note: 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 Hanna CALCHECK™ Standards, otherwise erroneous results will be obtained.orCALIBRATION PROCEDURE