Instruction Manual HI 93711 Free & Total Chlorine ISM Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct operation of the meter. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. 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. Sampling in Progress. This prompt appears each time the meter is performing a measurement. This indicates that the meter is in a zeroed state and measurement can be performed. A zero reading was not taken. Insert a sample before adding reagent and press ZERO. Under range. 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. Over range. A flashing value higher than the maximum concentration readable (see specifications) indicates that the sample absorbs too much light, meaning that the concentration is too high. Dilute the sample. Light over range. 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. Light under range. The zero sample is too dark for proper zeroing. If this is not the case, contact your dealer or the nearest Hanna Customer Service Center. The "V" indicates that the battery voltage is getting low and the battery needs to be replaced. This indicates that the battery is dead and must be replaced. Note: once this indication is displayed, the meter will lockup. Change the battery to restart. PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipment. If there is any damage, notify your Dealer. Each Ion Specific Meter is supplied complete with · 9V Battery · Two Sample Cuvets and Caps · One Transport Cap Note: Conserve all packing material until the instrument has been observed to function correctly. Any defective item must be returned in its original packing. SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method Free Cl2 0.00 to 2.50 mg/L Total Cl2 0.00 to 3.50 mg/L 0.01 mg/L ±0.03 mg/L ±3% of reading ±0.01 mg/L www.hannainst.com This Instrument is in Compliance with the CE Directives GENERAL DESCRIPTION WARRANTY HI 93711 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. 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. All rights are reserved. 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. Display codes aid the user in routine operations. 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. · Select free or total Chlorine by pressing FREE/TOTAL. 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). As a general rule of thumb, they should be doubled at 10°C (50°F) and halved at 30°C (86°F). INTERFERENCES Interference may be caused by: Bromine Iodine Fluorine Ozone Oxidized manganese and Chromium Alkalinity above 250 mg/L or acidity above 150 mg/L will not reliably develop the full amount of color or it may rapidly fade. To resolve this, neutralize the sample with diluted HCl or NaOH. In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately 1 minute after adding the powder reagent. ACCESSORIES REAGENT SETS HI 93701-01 HI 93701-03 HI 93711-01 HI 93711-03 HI 93701-T HI 710009 HI 710010 HI 721310 HI 731318 HI 731321 HI 731325 HI 93703-50 Reagents for 100 free chlorine tests (powder) Reagents for 300 free chlorine tests (powder) Reagents for 100 total chlorine tests (powder) Reagents for 300 total chlorine tests (powder) Reagents for 300 chlorine tests (liquid) Blue rubber boot Orange rubber boot 9V battery (10 pcs) Tissue for wiping cuvets (4 pcs) Glass cuvets (4 pcs) Caps for cuvets (4 pcs) Cuvets cleaning solution (230 mL). or · Fill the cuvet with 10 mL of unreacted sample, up to the 10 mL mark, and replace the cap. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will appear on the display. ZERO OTHER ACCESSORIES · The instrument directly displays concentration in mg/L of Free or Total Chlorine on the Liquid Crystal Display. Liquid reagents procedure · To an empty cuvet add 3 drops of HI 93701A-T x3 DPD1 indicator, 3 drops of HI 93701B-T DPD1 buffer and only in case of Total Chlorine measurement add also 1 drop of HI 93701C DPD solution. Swirl gently to mix and immediately add 10 mL of unreacted sample. Replace the cap and shake gently again. · Reinsert the cuvet into the instrument. x3 x1 TIPS FOR AN ACCURATE MEASUREMENT The instruction listed below should be carefully followed during testing to ensure best accuracy. · Do not touch the cuvet walls with hands. · In order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvet to prevent any contamination. · Do not let the test sample stand too long after reagent is added or accuracy will be lost. · Whenever the cuvet is placed into the measurement cell, it must be completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. · It is important that the sample does not contain any debris. This would corrupt the readings. · It is possible to take multiple readings in a row, but it is recommended that a zero reading be taken for each sample and that the same cuvet is used for zeroing and measurement. · 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-". Now the meter is zeroed and ready for measurement. · 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. 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. IST93711R4 09/03 or ...