User manual HANNA INSTRUMENTS HI 93712

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Manual abstract: user guide HANNA INSTRUMENTS HI 93712

Detailed instructions for use are in the User's Guide.

[. . . ] 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 93712 meter measures the aluminum content in water and wastewater in the 0. 00 to 1. 00 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 powder form and are supplied in packets. 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 @ 470 nm Adaptation of the aluminon method. The reaction between aluminum and reagents causes a reddish 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 93712A-0 A HI 93712B-0 B HI 93712C-0 C Description Quantity Ascorbic acid 1 packet Aluminum reagent 1 packet Bleaching powder 1 packet V REAGENT SETS HI 93712-01 Reagents for 100 tests HI 93712-03 Reagents for 300 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. ON OFF · Press READ TIMED and the display will show the countdown prior to zeroing the blank. Alternatively wait for 15 minutes and press ZERO. In both cases "SIP" will appear during zeroing. READ TIMED 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. [. . . ] "SIP" will appear during measurement. READ · Add the contents of one packet of HI 93712A ascorbic acid reagent and mix until dissolution is complete. B DIRECT CE DECLARATION OF CONFORMITY · Add the content of one packet of HI 93712B aluminum reagent and mix until dissolution is complete. · Fill two cuvets up to 1. 5 cm (¾") below the rim with 10 mL of sample each. 1. 5 cm 1. 5 cm · The instrument directly displays concentration in mg/L of aluminum on the Liquid Crystal Display. INTERFERENCES Interference may be caused by: Iron above 20 mg/L Alkalinity above 1000 mg/L Phosphate above 50 mg/L Fluoride will interfere at all levels. · Add the content of one HI 93712C bleaching powder packet to one of the two cuvets and agitate. · Place the blank into the holder and ensure that the notch on the cap is positioned securely into the groove. C 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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