User manual HANNA INSTRUMENTS HI 93753

[. . . ] A flashing value higher than the maximum range (see specifications) indicates that the sample absorbs too much light and that the concentration is too high. The cuvet is not inserted correctly and an excess ambient light is reaching the detector. If the cover is properly installed, then contact your dealer or the nearest Hanna Customer Service Center. The zero sample is too dark for proper zeroing. [. . . ] Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. The HI 93753 meter measures the chloride (Cl­) content in water and wastewater in the 0 to 20 mg/L (ppm) range. The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same position every time it is placed into the measurement cell. The reagents are in liquid form and are supplied in bottles. The amount of reagent is precisely dosed to ensure maximum repeatability. Display codes aid the user in routine operations. The meter has an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. Light Emitting Diode @ 470 nm Adaptation of the mercury(II) thiocyanate method. The chloride ion displaces thiocyanate ion from mercury(II). The iron(III) present forms with thiocyanate an orange colored complex. The intensity of color is proportional to the chloride ion concentration. 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 80 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ) REQUIRED REAGENTS Code HI 93753A-0 HI 93753B-0 Description Displacing Reagent Complexing Reagent Quantity 1. 0 mL 1. 0 mL REAGENT SETS HI 93753-01 Reagents for 100 tests and two 1 mL syringes HI 93753-03 Reagents for 300 tests and six 1 mL syringes OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · When the LCD displays "- - -", it is ready. · Fill one cuvette (#1) with 10 mL of distilled water (up to the mark). ON OFF INTERFERENCES The pH of sample after addition of reagents should be about 2. For alkaline samples, neutralize before adding reagents. Intensely colored samples will cause interference, therefore they should be adequately treated before performing the test. Suspended matter in large amounts should be removed by prior filtration. BATTERY REPLACEMENT Battery replacement must only take place in a non-hazardous area using a 9V alkaline battery. Simply slide off the battery cover on the back of the meter. Detach the 9V battery from the terminals and attach a fresh 9V battery while paying SLIDE OFF attention to the correct polarity. Replace the battery and the cover. #1 #2 10 mL #1 · Fill another cuvette (#2) with 10 mL of sample (up to the mark). 10#mL 2 Note: for low chloride ions concentration, rinse the cuvette a couple of times with sample before filling it with 10 mL of sample (up to the mark). Note: for most accurate results, use two graduated pipettes to deliver exactly 10 mL of distilled water and 10 mL of sample to the cuvets. · Using the 1 mL syringe, add 0. 5 mL of HI 93753A-0 Displacing Reagent to each cuvet. · Replace the caps and mix each cuvet by turning the cuvette upside down for approximately 30 seconds. · Place the cuvet with the reacted distilled water (#1) into the instrument. ACCESSORIES · 2 syringes (1 mL), included in the HI 93753 reagents set. #1 ACCESSORIES REAGENT SETS HI 93753-01 Reagents for 100 tests HI 93753-03 Reagents for 300 tests TIPS FOR AN ACCURATE MEASUREMENT The instructions below should be carefully followed during testing to ensure best accuracy. [. . . ] · Press READ DIRECT and "SIP" will blink on the LCD during measurement. CE DECLARATION OF CONFORMITY 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. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. To avoid damages or burns, do not perform any measurement in microwave ovens. Note: to dose exactly 0. 5 mL of reagent with the syringe, push the plunger completely into the syringe and insert the tip into the HI 93753A-0 Displacing Reagent bottle. [. . . ]