User manual HANNA INSTRUMENTS HI 83741

[. . . ] 7 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 GUIDE TO DISPLAY CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 GENERAL TIPS FOR AN ACCURATE MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 MEASUREMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact your dealer. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 4 17 BATTERIES REPLACEMENT Battery replacement must only take place in a nonhazardous area. The blinking " " will appear when the batteries power gets low. When batteries are completely discharged, "0% bAtt" will appear and after two seconds the instrument is switched off. Remove the battery cover from the bottom of the instrument and change the old batteries with 4 fresh 1. 5V batteries, paying attention to the correct polarity. Replace the cover. SPECIFICATIONS Range Resolution Precision Light Source Light Detector Method Environment Battery Type Auto-Shut off Dimensions Weight REQUIRED REAGENTS Code HI 83741A-0 HI 83741B-0 HI 83742-0 0. 0-15. 0 mg/L 0. 1 mg/L SD ±0. 4 mg/L @ 4. 0 mg/L Tungsten lamp with narrow band interference filter @ 560 nm Silicon Photocell The reaction between Iron and the reagents causes a purple tint in the sample. 0 to 50°C (32 to 122°F); max 95% RH non-condensing 4 x 1, 5 volt AA batteries / 12 to 20 VDC through voltage adapter After 15' of non-use in measurement mode. 225 x 85 x 80 mm (8. 7 x 3. 3 x 3. 1") 500 g (17, 6 oz. ) Description Iron Reagent A Iron Reagent B Wine solvent-1 Quantity/test 1 packet 1 packet 9 mL ACCESSORIES REAGENT SETS HI 83741-20 Iron reagents set for wine (20 tests) OTHER ACCESSORIES HI 740027P 1. 5V AA batteries (10 pcs) HI 731318 Tissue for wiping cuvets (4 pcs) HI 731321 Glass cuvets (4 pcs) HI 731325W Caps for cuvets (4 pcs) HI 93703-50 Cuvets cleaning solution (230 mL) HI 731341 1000 µL automatic pipette HI 731351 Plastic tips for 1000 µL automatic pipette (25 pcs) 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 4. 0 mg/L iron and a representative lot of reagent, an operator obtained with a single instrument a standard deviation of 0. 4 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 Lambert-Beer 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 · Reinsert the cuvet into the instrument and close the lid. · Press TIMER and the instrument will show the countdown or, alternatively, wait for 2 minutes. At the end an acoustic signal alerts the user that the countdown has finished. · Press READ and the display will show "----" during measurement. · The instrument directly displays concentration in mg/L (ppm) of iron on the Liquid Crystal Display. [. . . ] Contact your dealer or the nearest Hanna Customer Service Center. (a) (b) (c) b) on sample reading: "Inverted": the sample and the zero cuvet are inverted. · In order to avoid reagent leaking and to obtain more accurate measurements, it is recommended to close the cuvet first with the supplied HDPE and then with the black plastic stopper cap. · Diluting procedure: Use the 1000 µL automatic pipette to add twice exactly 1 mL of sample to an empty cuvet. Then fill the cuvet up to the mark with iron-free deionized water. Close the cap and invert the cuvet several times. [. . . ]