User manual HANNA INSTRUMENTS HI 93739

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Manual abstract: user guide HANNA INSTRUMENTS HI 93739

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[. . . ] A flashing value higher than the maximum concentration readable (see specifications) indicates that the sample absorbs too much light, meaning that the concentration is too high. The cuvet is not inserted correctly and an excess ambient light is reaching the detector. If the cover is properly installed, then contact your dealer or the nearest Hanna Customer Service Center. The zero sample is too dark for proper zeroing. [. . . ] 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. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc. , Woonsocket, Rhode Island, 02895 , USA. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. The HI 93739 meter measures the fluoride (F­) content in water, wastewater and seawater in the 0 to 20 mg/L (ppm) range. The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same place every time it is placed into the measurement cell. The reagents are in liquid form and are supplied in bottles. The amount of reagent is precisely dosed to ensure maximum repeatability. Display codes aid the user in routine operations. The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. Light Emitting Diode @ 585 nm Adaptation of the SPADNS method. The reaction between fluoride and the liquid reagent causes a red tint in the sample Light Detector Silicon Photocell Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing Battery Type/Life 1 x 9 volt/40 hours Auto-Shut off After 10' of non-use Dimensions 180 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ). REQUIRED REAGENTS Code HI 93739A-0 HI 93739B-0 Description Buffer Reagent Indicator Reagent Quantity 2 mL 8 mL V REAGENT SETS HI 93739-01 Reagents for 100 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/ OFF. ON OFF · Add with the other syringe exactly 1. 00 mL of sample. TIPS FOR AN ACCURATE MEASUREMENT The instruction listed below should be carefully followed during testing to ensure best accuracy. · Do not touch the cuvet walls with hands. · In order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvet to prevent any contamination. · Do not let the test sample stand too long after reagent is added or accuracy will be lost. · Whenever the cuvet is placed into the measurement cell, it must be completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. · It is important that the sample does not contain any debris. [. . . ] · Press ZERO and "SIP" will appear on the display. ZERO INTERFERENCES Negative interferences may be caused by: Alkalinity (as CaCO3) above 5000 mg/L Aluminum above 0. 1 mg/L Iron, ferric above 10 mg/L Positive interferences may be caused by: Chloride above 700 mg/L Phosphate, ortho above 16 mg/L Sodium hexametaphosphate above 1. 0 mg/L Sulfate above 200 mg/L Highly colored and turbid samples may require distillation Highly alkaline samples can be neutralized with nitric acid. BATTERY REPLACEMENT Battery replacement must only take place in a non-hazardous area using a 9V alkaline battery. Simply slide off the battery cover on the back of the meter. Detach the battery from the terminals and attach a fresh 9V battery while paying attention to the correct polarity. Replace the battery and the cover. 9V · Wait for a few seconds and the display will show "-0. 0-". [. . . ]

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