User manual HANNA INSTRUMENTS HI 93719

[. . . ] directives This instrument is in compliance with EN 50081-1 and EN 50082-1. SPECIFICATIONS DISPLAY CODE GUIDE This indicates that the meter is in a ready state and zeroing can be performed. This indicates that the meter is in a zeroed state and measurement can be performed. A blinking "0. 00" indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvet for reference (zero) and measurement. [. . . ] 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 93719 meter measures the magnesium hardness content, as CaCO3, 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 amount of reagent is precisely dosed to ensure maximum repeatability. The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. Light Emitting Diode @ 555 nm Adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, EDTA colorimetric method. The reaction between Mg and reagents causes a violet 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 93719A-0 HI 93719B-0 HI 93719C-0 HI 93719D-0 Description Mg indicator Alkali solution EDTA solution EGTA solution Quantity 0. 5 mL 0. 5 mL 1 drop 1 drop V REAGENT SETS HI 93719-01 Reagents for 100 tests HI 93719-03 Reagents for 300 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · Add 0. 5 mL of HI 93719A Magnesium indicator solution, then swirl to mix. · Add 0. 5 mL of HI 93719B Alkali solution for Magnesium, then swirl to mix. · Fill two cuvets up to 1. 5 cm (¾") below the rim with 10 mL of sample each. ON OFF · Wait for a few seconds and the display will show "-0. 0-". · Remove the blank and insert the sample into the instrument, making sure that the notch on the cap is positioned securely into the groove. · Press READ TIMED and the display will show the countdown prior to the measurement. In both cases "SIP" will appear during measurement. of the sample is the reading obtained multiplied by a factor of one hundred (the dilution factor). For your reference, factors to convert readings in mg/L to French degrees (FD), German degrees (DD) and English degrees (ED) of hardness are as follows: 1 mg/L = 0. 1 FD = 0. 056 DD = 0. 07 ED. ACCESSORIES REAGENT SETS HI 93719-01 Reagents for 100 tests HI 93719-03 Reagents for 300 tests INTERFERENCES Interference may be caused by excessive amounts of heavy metals. OTHER ACCESSORIES HI 710009 HI 710010 HI 721310 HI 731318 HI 731321 HI 731325 HI 93703-50 Blue rubber boot Orange rubber boot 9V battery (10 pcs) Tissue for wiping cuvets (4 pcs) Glass cuvets (4 pcs) Caps for cuvets (4 pcs) Cuvets cleaning solution (230 mL). A TIPS FOR AN ACCURATE MEASUREMENT The instruction listed below should be carefully followed during testing to ensure best accuracy. · 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 possible to take multiple readings in a row, but it is recommended that a zero reading be taken for each sample and that the same cuvet is used for zeroing and measurement. · It is important to discard the sample immediately after the reading is taken because the glass might become permanently stained. [. . . ] · Fill the beaker up to the 50 mL mark with hardness-free water. The true value D · Place the blank 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 Recommendations for Users Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. [. . . ]