User manual HANNA INSTRUMENTS HI 93741

[. . . ] HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as: Instruction Manual MULTIPARAMETER ION SPECIFIC METERS · · · · · · · Water Treatment Process Swimming Pools Agriculture Food Laboratory Thermometry and many others. New reference material is constantly being added to the library. For these and other catalogs, handbooks and leaflets contact your dealer or the Hanna Customer Service Center nearest to you. [. . . ] To resolve this, neutralize the sample with diluted HCl or NaOH. In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately 1 minute after adding the reagent. MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · The meter will automatically default to pH measurement mode. · When the LCD displays "- - -", it is ready. ON OFF pH pH MEASUREMENTS In order to perform pH measurements, follow the procedure on page 46. CYANURIC ACID MEASUREMENTS · Press the pH/CYS key to select the cyanuric acid scale. "pH" will disappear from the LCD. · Follow the procedure on page 38. HI 93724 Cyanuric A. & pH 10 43 Iodine IODINE MEASUREMENT · Fill the cuvet up to the mark 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 HI 93725 - pH & Total Hardness 10 mL The HI 93725 meter measures pH and Magnesium/Calcium and Total Hardness content in water and wastewater. · Wait for a few seconds and the display will show "-0. 0-". Now the meter is zeroed and ready for measurement. · Remove the cap and add the content of one packet of HI 93718 reagent. · Reinsert the cuvet into the instrument. SPECIFICATIONS Range pH Mg Hardness Ca Hardness Total Hardness Resolution pH Hardness Accuracy pH Hardness Typical EMC pH Deviation Hardness Light Source Method 5. 9 to 8. 5 0. 00 to 2. 00 mg/L 0. 00 to 2. 70 mg/L 0. 00 to 4. 70 mg/L 0. 1 0. 01 mg/L ±0. 1 ±0. 11 mg/L ±5% of reading) ±0. 1 ±0. 02 mg/L Light Emitting Diode @ 555 nm For pH, Phenol red method. The reaction with reagent causes a red tint in the sample. For total hardness, adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, Calmagite/colorimetric method. The reaction between hardness and reagents causes a maroon tint in the sample. · Wait for 2 minutes and 30 seconds and press READ. "SIP" will appear during measurement. · The instrument directly displays concentration in mg/L of iodine on the Liquid Crystal Display. Iodine 42 11 HI 93725 pH & Total Hardness REQUIRED REAGENTS Code HI 93710-0 HI 93719A-0 HI 93719B-0 HI 93719C-0 HI 93719D-0 Description pH Phenol red Ca & Mg indicator Alkali solution EDTA solution EGTA solution Quantity 5 drops 0. 5 mL 0. 5 mL 1 drop 1 drop · Pressing READ will result in the meter scrolling through the hardness concentration in mg/L (ppm) by first displaying the Magnesium (n), then the Calcium (C) and then the Total (t). · By pressing ZERO the meter will be reset and be ready for another test of Hardness. ZERO REAGENT SETS HI 93710-01 Reagents for 100 pH tests HI 93710-03 Reagents for 300 pH tests HI 93719-01 Reagents for 100 hardness tests HI 93719-03 Reagents for 300 hardness tests For other accessories see page 48. SAMPLE DILUTION This meter is designed to determine low levels of hardness, typically found in water purification systems. When testing some other sources of water, it is not uncommon to come across levels of hardness that are greater than the range of this meter. This problem can be overcome through dilution. Dilutions must be performed with hardness-free water or the readings will be erroneous. A dilution to reduce the level of hardness by a factor of one hundred is performed as follows: · Fill a 1 mL syringe with the sample. · Place the syringe in a 50 mL beaker, making sure that the beaker is clean and empty, and inject 0. 5 mL into the beaker. · Fill the beaker up to the 50 mL mark with hardness-free water. [. . . ] For Hardness, adaptation of the Standard Meth21 HI 93744 Hardness/Iron LR/pH Bromine 32 ods for the Examination of Water and Wastewater, 18th edition, Calmagite/colorimetric method. The reaction between hardness and reagents causes a maroon tint in the sample. REQUIRED REAGENTS Code HI 93710-0 HI 93746-0 HI 93719A-0 HI 93719B-0 HI 93719C-0 HI 93719D-0 Unit pH Iron LR Hardness Hardness Hardness Hardness · At this point, follow the chlorine procedure on page 36. Note: Free and total chlorine have to be measured separately with fresh unreacted samples following the above procedure if both values are requested. Description Phenol red TPTZ Reagent Ca & Mg indicator Alkali solution EDTA solution EGTA solution Quantity 5 drops 2 packets 0. 5 mL 0. 5 mL 1 drop 1 drop CYANURIC ACID MEASUREMENTS · Press SET to select the cyanuric acid scale. "A" will appear on the LCD. SET REAGENT SETS HI 93710-01 Reagents for 100 pH tests HI 93710-03 Reagents for 300 pH tests HI 93746-01 Reagents for iron LR (100 packets) HI 93746-03 Reagents for iron LR (300 packets) HI 93719-01 Reagents for 100 hardness tests HI 93719-03 Reagents for 300 hardness tests For other accessories see page 48. · At this point, follow the procedure on page 38. MEASUREMENT PROCEDURES ON OFF · Turn the meter on by pressing ON/OFF. · When the LCD displays "- - - -" keep SET pressed until the desired parameter is displayed. SET · Release the key and when the LCD displays "- - -", it is ready. [. . . ]