User manual HANNA INSTRUMENTS HI 93711

[. . . ] This instrument is in compliance with directives. SPECIFICATIONS DISPLAY CODE GUIDE This indicates that the meter is in a ready state and zeroing can be performed. This indicates that the meter is in a zeroed state and measurement can be performed. A blinking "0. 00" indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvet for reference (zero) and measurement. [. . . ] If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc. , Woonsocket, Rhode Island, 02895 , USA. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. The HI 93711 meter measures the free and total chlorine (Cl2) content in water and wastewater. The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same place every time it is placed into the measurement cell. The reagents are in liquid and powder form and are supplied in bottles and in packets. The amount of reagent is precisely dosed to ensure maximum repeatability. The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. Light Emitting Diode @ 555 nm Adaptation of the EPA recommended DPD method 330. 5. The reaction between the chlorine and the DPD reagent causes a pink tint in the sample. 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 POWDER: Code Unit HI 93701-0 Free Cl2 HI 93711-0 Total Cl2 LIQUID: Code Unit HI 93701A-T Free and Total Cl2 HI 93701B-T Free and Total Cl2 HI 93701C Total Cl2 only Description DPD DPD Description DPD1 indicator DPD1 buffer DPD3 solution Quantity 1 packet 1 packet Quantity 3 drops 3 drops 1 drop V OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. ON OFF · When the LCD displays "- - -", it is ready. An "I" or a "C" will appear on the right corner to indicate free or total chlorine, respectively. FREE TOTAL · Replace the cap and shake gently for 20 seconds (or 2 minutes in case of seawater analysis). · Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Wait for 1 minute in case of Free Chlorine or 2 minutes and 30'' seconds in case of Total Chlorine and then press READ. The display will show "SIP" during measurements. · The instrument directly displays concentration in mg/L of Free or Total Chlorine on the Liquid Crystal Display. Note: free and total chlorine have to be measured separately with fresh unreacted samples following the above procedure if both values are requested. · Shaking the cuvet can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the vial. · All the reaction times reported in this manual are referred to 20°C (68°F). [. . . ] · It is important to discard the sample immediately after the reading is taken because the glass might become permanently stained. CE DECLARATION OF CONFORMITY · Wait for a few seconds and the display will show "-0. 0-". · Remove the cuvet Powder reagents procedure · Add the specific test reagent to the cuvet: Free Chlorine: 1 packet of Total Chlorine: 1 packet of DPD Free Chlorine reagent DPD Total Chlorine reagent. · Wait for 1 minute in case of Free Chlorine or 2 minutes and 30'' seconds in case of Total Chlorine and then press READ. The display will show "SIP" during measurements. 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. [. . . ]