User manual HANNA INSTRUMENTS HI 3812

[. . . ] HI 3812 1 2 HARDNESS TEST KIT 3 4 x5 x1 5 mL sample 50 mL sample 5 Instruction Manual Range SPECIFICATIONS 0 to 30 mg/L (ppm) CaCO3 0 to 300 mg/L (ppm) CaCO3 0. 3 mg/L [in the 0-30 mg/L range] 3 mg/L [in the 0-300 mg/L range] EDTA titration 5 mL and 50 mL (average) 100 (average) 200x120x60 mm (7. 9x4. 7x2. 4") 460 g (1 lb. ) INSTRUCTIONS READ ALL THE INSTRUCTIONS BEFORE USING THE TEST KIT LOOK AT THE BACK PAGE FOR THE ILLUSTRATED PROCEDURE Note: push and twist pipet tip into tapered end of syringe ensuring an air-tight fit. · Continue adding the titration solution until the solution becomes purple, then mix for 15 seconds after each additional drop until the solution turns blue. HI 3812 Hardness Test Kit Smallest Increment Analysis Method Sample Size Number of Tests Case Dimensions Shipping Weight HIGH RANGE ­ 0 to 300 mg/L CaCO3 · Remove the cap from the small plastic vessel. Rinse the plastic vessel with the water sample, fill to the 5 mL mark and replace the cap. [. . . ] · Remove the cap from the large plastic vessel. Rinse it with the water sample, fill to the 50 mL mark and replace the cap. · Proceed with the titration as for the high range test. · Read off the milliliters of titration solution from the syringe scale and multiply by 30 to obtain mg/L (ppm) CaCO3. SPECIFICATIONS www. hannainst. com ISTR3812R3 03/02 Dear Customer, Thank you for choosing a Hanna Product. Please read the instructions carefully before using the chemical test kit. It will provide you with the necessary information for correct use of the kit. Remove the chemical test kit from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna office immediately. Each kit is supplied with: · Hardness Buffer, 1 bottle with dropper (30 mL); · Calmagite Indicator, 1 bottle with dropper (10 mL); · HI 3812-0 EDTA Solution, 1 bottle (120 mL); · 1 calibrated plastic vessel (20 mL) with cap; · 1 calibrated plastic vessel (50 mL) with cap; · 1 syringe (1 mL) with tip. Note: any damaged or defective item must be returned in its original packing materials. · Add 1 drop of Calmagite Indicator through the cap port and mix as described above. The solution becomes a redviolet color. x1 x 30 = CaCO 3 REFERENCES Standard Methods for the Examination of Water and Wastewater. 11. 01, Water (I). CHEMICAL REACTION The hardness level as mg/L (ppm) calcium carbonate is determined by an EDTA (ethylene-diamine-tetraacetic acid) titration. [. . . ] · Place the syringe tip into the cap port of the plastic vessel and slowly add the titration solution dropwise, swirling to mix after each drop. HEALTH AND SAFETY The chemicals contained in this kit may be hazardous if improperly handled. Read Health and Safety Data Sheet before performing this test. [. . . ]