User manual HANNA INSTRUMENTS HI 93715

[. . . ] 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 93715 meter measures the ammonia nitrogen (NH3N) content in water, wastewater and seawater in the 0. 00 to 9. 99 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 @ 470 nm Adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92, Nessler method. The reaction between ammonia and reagents causes a yellow 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 80 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ) V REQUIRED REAGENTS Code HI 93715A-0 HI 93715B-0 Description First Reagent Second Reagent Quantity 4 drops (6 drops in seawater) 4 drops (10 drops in seawater) REAGENT SETS HI 93715-01 Reagents for 100 tests HI 93715-03 Reagents for 300 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · When the LCD displays "- - -", it is ready. · Fill the 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 · Add 4 drops of the Second reagent (10 drops in case of seawater analysis). 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 lost. · Whenever the cuvet is placed into the measurement cell, it must be completely free of fingerprints, oil or dirt. [. . . ] · Remove the cuvet. · The instrument directly displays concentration in mg/L of ammonia nitrogen (NH3-N) on the display. · To convert the reading to mg/L of ammonia (NH3), multiply the display by a factor of 1. 214. BATTERY REPLACEMENT INTERFERENCES Interference may be caused by: Hardness above 1 g/L Iron, Sulfide, Glycine, Various aliphatic and aromatic amines Organic chloramines Acetone Aldehydes Alcohols. 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. [. . . ]