User manual HANNA INSTRUMENTS HI 93751

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Manual abstract: user guide HANNA INSTRUMENTS HI 93751

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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 93751 meter measures the sulfate content in water, wastewater and seawater in the 0 to 150 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 reagent is in powder form and is supplied in packet. 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. ±1 mg/L Light Emitting Diode @ 470 nm Sulfate is precipitated with barium chloride crystals. Light absorbance of the suspension is measured. 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 80 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ) V REQUIRED REAGENTS Code HI 93751-0 Description Indicator Reagent Quantity 1 packet REAGENT SETS HI 93751-01 Reagents for 100 tests Operational Guide MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · When the LCD displays "- - -", it is ready. · Fill a cuvet up to 1. 5 cm (¾") below the rim with 10 mL of unreacted sample and replace the cap. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will appear on the display. ZERO · Reinsert the cuvet into the instrument. ON OFF 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 affected. [. . . ] Calcium (as CaCO3) Chloride (as Cl-) Magnesium (as MgCO3) Silica (as SiO2) >20000 mg/L >40000 mg/L >10000 mg/L >500 mg/L · Wait for a few seconds and the display will show "-0. 0-". Now the meter is zeroed and ready for measurement. · Add the content of one packet of HI 93751-0 reagent 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. [. . . ]

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