User manual HANNA INSTRUMENTS HI 93705

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[. . . ] A flashing value higher than the maximum readable concentration (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 93705 meter measures the silica (SiO2) content in water and wastewater in the 0. 00 to 2. 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 liquid and powder form and are supplied in bottles and 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 @ 890 nm Adaptation of the ASTM D859 method of the heteropoly blue method. The reaction between silica and reagents causes a blue 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 93705A-0 HI 93705B-0 HI 93705C-0 Description Molybdate Citric acid Amino acid Quantity 6 drops 1 packet 1 packet V REAGENT SETS HI 93705-01 Reagents for 100 tests HI 93705-03 Reagents for 300 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. ON OFF · Remove the cuvet and add the content of one packet of HI 93705C amino acid reagent and shake until it has dissolved. 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. [. . . ] This is the blank. · 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 Interference may be caused by: Phosphate above 60 mg/L (causes a 2% reduction in reading) Phosphate above 75 mg/L (causes an 11% reduction in reading) Sulfide and high concentration of iron Eliminate color and turbidity interferences by zeroing the meter with the original water sample. 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. [. . . ]

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