User manual HANNA INSTRUMENTS HI 38018

[. . . ] Instruction Manual SPECIFICATIONS Range Smallest Increment Analysis Method Sample Size Number of Tests Case Dimensions Shipping Weight 0 to 0. 7 mg/L (ppm) as Chlorine (LR) 0 to 3. 5 mg/L (ppm) as Chlorine (MR) LR: 0. 02 mg/L MR: 0. 1 mg/L Colorimetric 10 mL (LR), 5 mL (MR) 200 235x175x115 mm (9. 2x6. 9x4. 5") 647 g (22. 8 oz. ) INSTRUCTIONS READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT · To measure free chlorine in the 0-0. 7 mg/L range, verify that the mirror, its holder and the disc are preinstalled in the checker disc. If not, install them as shown in the figure. · Remove the cap and add 1 packet of HI 93701-0 reagent. [. . . ] 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, packet powder (200 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). Note: Any damaged or defective item must be returned in its original packing materials. PRINTED IN ITALY 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. Free chlorine reacts with ammonium ions and organic compounds to form chlorine compounds resulting in diminished disinfecting capabilities compared with free chlorine. Chlorine compounds together with chloramines form combined chlorine. Combined chlorine and free chlorine together result in total chlorine. While free chlorine has a much higher disinfectant potential, combined chlorine has a much higher stability and has a lesser volatility. Note: mg/L is equivalent to ppm (parts per million). · Insert one of the vials into the left hand opening of the checker disc. This is the blank. · 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. ISTR38018 · To measure free 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 opening of the checker disc. · Add to the other vial demineralized water up to the 10 mL mark and shake to mix. Caution: Ultraviolet radiation may cause fading of colors. [. . . ] For best results: Perform the reading three times and take the average value (divide by 3 the sum of the three numbers). Intensely colored samples will make the color matching difficult and they should be adequately treated before performing the test. Suspended matter in large amounts should be removed by prior filtration. [. . . ]