User manual HANNA INSTRUMENTS HI 38017

[. . . ] DPD Total Chlorine reagent. HI 38017 Free & Total Chlorine Low and Medium Range Test Kit with Checker Disc SIGNIFICANCE AND USE Chlorine is the most commonly used water disinfectant in applications that vary from treatment of drinking water and wastewater, pool and spa sanitization, to food processing and sterilization. Chlorine present in water binds with bacteria, leaving only a part of the original quantity (free chlorine) to continue its disinfecting action. If the free chlorine level is improper with respect to pH, water will have an unpleasant taste and odor and the disinfecting potential of the chlorine will be diminished. [. . . ] Rotate the disc while looking at the color test windows and stop when you find the color match. Read the value in the result window and divide it by 5 to obtain mg/L (or ppm) of Chlorine. · Insert one of the vials into the left hand opening of the checker disc. This is the blank. www. hannainst. com Note: Any damaged or defective item must be returned in its original packing materials. ISTR38017 Dear Customer, Thank you for choosing a Hanna Product. Please read the instruction sheet carefully before using the test kit. It will provide you with the necessary information for correct use of the kit. If you need additional information, do not hesitate to e-mail us at tech@hannainst. com. 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: · HI 93701-0 Free Chlorine reagent, packets (100 pcs); · HI 93711-0 Total Chlorine reagent, packets (100 pcs); · Demineralizer Bottle with filter cap for about 12 liters of deionized water (depending on the hardness level of water to be treated); · 1 checker disc (containing a mirror, a mirror holder and the disc); · 2 glass vials with caps; · 1 plastic pipette (3 mL). · Remove the cap and fill the Demineralizer Bottle with tap water. · Replace the cap and shake gently for at least 2 minutes. · Flip open the top of the Demineralizer Bottle cap. By gently squeezing the bottle, add demineralized water to the other vial up to the 20 mL mark. Replace the cap and shake to mix. 02/00 CHEMICAL REACTION The reaction between chlorine and the DPD reagent causes a pink tint in the sample which is proportional to the chlorine concentration. · To measure chlorine in the 0-3. 5 mg/L range, remove the disc, mirror and its holder, if pre-installed. Then install just the disc as shown here. · Use the pipette to fill each glass vial with 5 mL of sample (up to the mark) and insert one of them into the left hand 5 mL opening of the checker disc. · Add to the other vial demineralized water up to the 10 mL mark and shake to mix. you find the color match. Read the value in the result window directly in mg/L (or ppm) of Chlorine. For best results: Perform the reading three times and take the average value (divide by 3 the sum of the three numbers). [. . . ] In the case of Total Chlorine determination, wait for 2 minutes to allow reaction to occur. · Remove the cap and insert the reacted sample into the right hand opening of the checker disc. · Hold the checker disc so that a light source illuminates the samples from the back of the windows. [. . . ]