User's Guide ExStik® CL200 Waterproof Total Residual Chlorine Tester Patent Pending Introduction Congratulations on your purchase of the ExStik® CL200 chlorine tester. The CL200 is a revolutionary first of its kind measurement device that offers direct reading of Total Chlorine from 0.01 to 10.00 ppm. The electrode method employed by the ExStik® is approved by the U.S. Environmental Protection Agency (EPA) as an acceptable method for wastewater compliance monitoring of total chlorine. For this type of electrode method, a reagent tablet must be added to the measurement solution before testing. The advantages of the CL200 to the user include: Easy to use and maintain, high accuracy, self-calibration, and fast response. The CL200 offers simultaneous Chlorine and Temperature displays and a 15-reading memory storage. Careful use and maintenance will provide years of reliable service. Applications The CL200 can be used wherever a measurement of the total chlorine in water is needed. This is also referred to as total residual chlorine. It measures the total of all chlorine present in all forms, including dissolved free chlorine, chloramines, hyporchlorous acid and hypochlorite ion. Typical applications include measurements of discharge water from water treatment plants, public drinking water supplies and cooling towers, and measurement of disinfectant properties in swimming pools and cooling water applications. 2 CL200 V6.0 06/05 Meter Description CL200 Front Panel Description 1 The ExStik’s® keys have functions which change depending on the electrode attached (pH, ORP or Chlorine). Key descriptions here apply for the ExStik® with a chlorine electrode attached. 1. Battery compartment 2 3 4 5 2. LCD Display 3. MODE/HOLD button (store data) 4. CAL/RECALL button (change temperature units and recall data. Calibration not required for chlorine) 5. ON/OFF button 6. Electrode Collar 6 7. Electrode (Note: The Electrode cap is not shown) ExStik® CL200 Display 1. Bargraph display 2. Measurement display 3. BAT (low battery) and HOLD (data hold) indicators 4. Temperature display 5. Bargraph scale designations 6. Unit of measure Accessories • CL203 – ExTab Reagent tablets (10-pack for 100 tests) • CL205 – Spare chlorine electrode • EX006 – Weighted base with 5 solution cups • PH100 – pH Electrode • RE300 – ORP Electrode • EX007 – Solution cups (24 pack) ® 3 CL200 V6.0 06/05 Getting Started Equipment Required A chlorine test requires a 20ml sample cup, a reagent tablet and the CL200 with a chlorine electrode attached. The optional EX006 Weighted base is a recommended accessory. Battery Activation An insulating tab is located in the battery compartment and prevents battery drain during storage. It must be removed before use. Refer to the battery replacement paragraph in the maintenance section. Measurement Procedure Sample Preparation: 1. Place the test sample into the sample cup up to the 20mL line. 2. Drop one reagent tablet into the sample, wait 10 seconds and then shake or stir vigorously until it is dissolved. Measurement: 1. Press the ON button and insert the electrode into the sample. 2. Stir the sample with the electrode for 5 to 10 seconds. The “HOLD” indicator will appear after 120 seconds. Reading: The value in the display is the total chlorine in ppm. Note: After running a test, wipe the entire electrode with a clean/dry paper towel. 4 CL200 V6.0 06/05 Storing Readings 1. Press the MODE button to store a reading. The storage location number will be displayed followed by the stored reading and the “HOLD” indicator. 2. Only one reading can be stored during the 120 second measurement cycle. 3. Press the MODE button again to return to normal operation. 4. If more than 15 readings are stored, previously stored readings (starting with number 1) will be overwritten. Recalling Stored Readings 1. Press the CAL button and then press the MODE button immediately after CAL is displayed; a location number (1 through 15) will flash. 2. The last stored reading taken will be displayed first. To scroll through the stored readings, press the MODE button. The location number is displayed first, followed by the reading stored in that location. 3. To exit the storage mode, press the CAL button and the CL200 will return to normal operation. Note: If the batteries are removed all stored readings will be lost. Changing the Temperature Units Press and hold the CAL button for approx. 3 seconds to change the temperature units. Auto-Power OFF The auto power off feature automatically shuts the CL200 off 10 minutes after the last keypress. Low Battery Indication When the batteries become weak the “BAT” icon will appear in the display. Refer to the Maintenance section for battery replacement information. 5 CL200 V6.0 06/05 Considerations and Techniques 1. If the meter has not been used for several weeks or is new, at least two tests should be made to condition the electrode. 2. Do not touch the reagent tablets. Touching can cause contamination. 3. If the electrode has not been used for in a 24hr period, wipe the tip with a clean/dry paper towel before use. 4. Before use, wash the sample cups and the caps and then rinse them completely. 5. The CL200 should not be left in a solution while turned off. If left in solution while turned off, subsequent readings may take longer to reach the correct value. 6. Do not touch the sensor surface except with a clean/dry paper towel. 7. When measuring solutions that have large differences in chlorine concentration, i.e. 0.1ppm and 5.0ppm, use separate sample cups. 8. Discard the sample cup when it shows a color change. 9. Maintain the electrode by completely wiping dry and then replacing the electrode cover immediately after taking a measurement. The electrode should always be stored in the dry cap. 10. Cover the connector with the clear cover whenever the electrode is removed from the meter body. 11. Gently stirring the probe in the solution for 10 seconds, within the first minute of operation, will accelerate the process and yield more accurate readings. Do not stir after 10 seconds. Troubleshooting Guide 1. If the unit appears locked it is possible that the Data Hold mode has been inadvertently accessed. If the HOLD icon is displayed, simply press the MODE button or turn the meter off and restart. 2. If the meter latches up and cannot be reactivated by a button press, remove the batteries and restart. Note that if the batteries are removed, any stored readings will be lost. Electrodes Types The CL200 can also measure ORP and pH. To perform these tests, the appropriate electrode must be acquired and connected to the ExStik®. When the unit is turned on, it recognizes the type of electrode that is connected and displays the appropriate unit of measure. 6 CL200 V6.0 06/05 Maintenance Battery Replacement 1. Twist off the battery compartment cap 2. Replace the four (4) CR2032 batteries observing polarity. 3. Replace the battery compartment cap Cleaning and Maintaining the Electrode The CL200 Chlorine Electrode arrives in a factory-cleaned condition and is ready to be used. The electrode will perform best and yield more stable readings after the first few tests. Before and after tests, firmly wipe the electrode tip with a clean, dry paper towel to remove any compounds that may have formed. When not in use, the CL200 should be stored with the electrode cap in place. Electrode Replacement The CL200 is shipped with an electrode attached. If the electrode has to be replaced, or if a pH or ORP electrode is to be installed, follow these steps: 1. Turn the unit off. 2. To remove an electrode, unscrew and remove the electrode collar (turn the collar counter-clockwise). 3. Gently rock the electrode from side to side, pulling it downwards, until it disconnects from the meter. 4. To attach an electrode, allign the slots and carefully plug the electrode into the meter socket. 5. Tighten the electrode collar firmly enough to make a good seal (a rubber gasket seals the electrode with the meter). 7 CL200 V6.0 06/05 Specifications Display Multifunction LCD with Bargraph Operating conditions 32 to 122oF (0 to 50oC) and < 80% RH Chlorine range 0.01 to 10.00 ppm (Total Chlorine) Chlorine accuracy 0.05 to 5.00ppm; ± (10%reading + 0.01ppm) 5.00 to 10.00ppm; ± (15%reading + 0.05ppm) Temperature measurement range 23 to 194oF (-5 to 90oC) Temperature range for Chlorine measurement 32 to 122oF (0 to 50oC) Temp. Resolution 0.1o up to 99.9 then 1o Temp. Accuracy ± 1.8oF (1oC) from 23 to 122oF (-5 to 50oC); ± 5.4oF (3oC) from 122 to 194oF (50 to 90oC) Measurement storage 15 readings can be stored and recalled Low battery indication ‘BAT’ appears on the LCD Power Four CR2032 button batteries Auto power off Automatically turns off after 10 minutes after the last key press 8 CL200 V6.0 06/05 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Calibration and Repair Services Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for most products. Call the Customer Service Department for information on calibration services available for this product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy. Support line (781) 890-7440 Technical support: Extension 200; E-mail: [email protected] Repair & Returns: Extension 210; E-mail: [email protected] Product specifications subject to change without notice For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451 Copyright © 2005 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form. 9 CL200 V6.0 06/05