Instruction Manual C401/301/201/102/101 Portable Colorimeter 68X357704 Rev. 0 08/04 Technology Made Easy ...
Preface This manual functions in two ways: first as a step by step guide to help you operate the waterproof C401/301/201/102/101 Colorimeter; second, it serves as a handy reference guide. It contains basic instructions that you must follow during the operation, care and maintenance of the instrument. The safety protection provided by this equipment may be impaired if it is used in a manner not described in this manual.
TABLE OF CONTENTS 1 INTRODUCTION .................................................................................................................. 1 1.1 1.2 1.3 1.4 2 UNPACKING C401/301/201/102/101 COLORIMETER AND ACCESSORIES ........................... 2 DISPLAY ............................................................................................................................ 3 KEYS AND FUNCTIONS ..................................................................................................
Introduction C401/301/201/102/101 1 INTRODUCTION Thank you for selecting the waterproof portable C401/301/201/102/101 Colorimeter. Depending on the model selected, the C401/301/201/102/101 Colorimeter allows you to measure up to four parameters - namely the pH, Cyanuric acid, Free Chlorine and Total Chlorine of an aqueous sample in the field.
Introduction 1.1 C401/301/201/102/101 Unpacking C401/301/201/102/101 Colorimeter and Accessories The table below indicates the items that you should find in your Colorimeter shipment. Item Quantity 1. Field Portable C401/301/202/102/101Colorimeter with 4 “AAA” batteries 1 2. Instruction Manual 1 3. Instrument Carrying Case 1 4. Empty Vial 4 5. pH Indicator (Phenol Red) Reagent Kit (Only for C101, C301, C401) 1 6. Cyanuric Acid Reagent Kit (Only for C102, C401) 1 7.
Introduction C401/301/201/102/101 Sample Vial Sample Well Meter Index Marking Liquid Crystal Display Keypad Figure 1: Parts of C401/301/201/102/101Colorimeter 1.2 Display All the LCD segments and annunciators that can appear on the display are shown in Figure 2. The display is used for reporting the colorimeter reading, communicate error messages and provide guidance for the operation of the instrument.
Introduction 1.3 C401/301/201/102/101 Keys and Functions The keypad has four keys: ON/OFF, MODE, ZERO and READ/ENTER. Keys Functions ON/OFF - Powers on and shuts off the meter. With the auto switch-off feature the meter automatically shuts off 10 minutes after last key press. MODE - Selects the test to be performed. - Selects the calibration point in an incremental circular manner during calibration. - Blanks the instrument (sets the meter to zero) before chemical reagent is added.
Introduction 1.4 C401/301/201/102/101 Battery Installation Four AAA-sized batteries are included in your meter’s packaging: 1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 4 : Battery Installation. 2. Remove the battery cover. 3. Insert the batteries. Follow the diagram inside the cover for correct polarity. 4. Replace the battery cover onto its original position using the two screws removed earlier. 5. The meter is now ready to operate.
Measurement C401/301/201/102/101 2 MEASUREMENT 2.1 General Information The waterproof C401/301/202/102/101Colorimeter allows you to measure up to four parameters - namely the pH, Cyanuric acid, Free Chlorine and Total Chlorine of a sample and reports the results in appropriate units (ppm or pH). Each specific measurement has its own range as listed in the specifications. The meter will go through a power sequence as shown below.
Measurement C401/301/201/102/101 2.2 Preparation of Sample Vial 1. Obtain a clean and dry sample vial (Figure 6). 2. Take care to handle the sample vial by the top. 3. Rinse the vial with approximately 10 ml of the sample water, capping the vial with the black screw cap and gently inverting it several times. Discard the used sample and repeat the rinsing procedure two more times. 4.
Measurement C401/301/201/102/101 indicate the last test performed 5. Select the desired test to be performed by pressing the MODE key. 6. Press the READ/ENTER key to confirm your selection. The meter will display [STbY] indicating it is ready to accept a measurement or a blanking. 7. Press the ZERO key to perform the blanking of the meter. If the user chooses to skip this step, the meter will use the last value of the blank for the next calculation. 8.
Measurement: Chlorine, Free & Total 2.4 C401/301/201/102/101 Chlorine, Free & Total (0 – 6ppm Cl2) • DPD method1 for Free Chlorine - applicable to water, treated water, estuary water and seawater. • DPD method1 for Total Chlorine - applicable to water, treated water, wastewater, estuary water and seawater. The DPD Method is USEPA accepted for reporting drinking water analyses (Free and Total Chlorine) and wastewater analyses2 (Total Chlorine only).
Measurement: Chlorine, Free & Total C401/301/201/102/101 7. Remove the vial from the meter and add into it the content of one DPD Free sachet (for Free Chlorine determination) or the content of one DPD Total sachet (for Total Chlorine determination). 8. Replace the cap, ensuring it is screwed on finger tight to the vial. Invert the vial repeatedly for approximately 20 seconds, until the powder has dissolved.
Measurement: Chlorine, Free & Total C401/301/201/102/101 Chlorine, Free & Total Measuring Hints & Tips 2.4.1 Sample Collection Chlorine determination must take place as soon as possible after the sample is taken or else low results may be obtained. Plastic containers should not be used to collect the sample because these may have a high chlorine demand which will lead to low reading results. It is advisable to wash the container with sample water before the sample is collected.
Measurement: Chlorine, Free & Total C401/301/201/102/101 2.4.3 Interferences Acidity: Greater than 250ppm CaCO3 may cause interference. To remove this interference, neutralise a separate sample to pH6-7 using 1N Sodium Hydroxide. Record the volume used and add the same volume of 1N Sodium Hydroxide to the sample before carrying out the above test procedure. Use a multiplication factor to correct for the dilution of the sample. Alkalinity: Greater than 250ppm CaCO3 may cause interference.
Measurement: Chlorine, Free & Total 6. C401/301/201/102/101 Subtract the result obtained in step 5 from the result obtained in step 1 to give the true result. 2.4.
Measurement: Chlorine, Free & Total C401/301/201/102/101 To re-calibrate the meter: All instruments are factory calibrated and user calibration is not recommended. However, if a Chlorine standard can be prepared, measured accurately and qualified by a different method (titration, for example) or another instrument of higher precision and accuracy, then a Chlorine standard in the 4.1-5.0 ppm Cl2 range can be used. Please refer to Section 3.2 Chlorine, Free & Total, for details. 2.4.
Measurement: Cyanuric Acid 2.5 • C401/301/201/102/101 Cyanuric Acid (5-90 ppm) For water and treated water 1. Switch the meter on by pressing the ON/OFF key. 2. Press the MODE key repeatedly until [CYNA] is displayed. 3. Press the READ/ENTER key to confirm the test parameter. The meter will read [STbY] indicating it is in stand-by mode, waiting for either blanking or measurement. READ ENTER 4. Select a clean and dry vial, un-screw the cap and fill with sample water to the line on the vial.
Measurement: Cyanuric Acid C401/301/201/102/101 Add content of one Cyanuric Acid sachet 9. Shake for 1 minute Gently push the vial back fully into the sample well of the instrument, whilst again aligning the ▼ mark on the vial with the ▲ mark on the meter. 10. Wait for two minutes and then press the READ/ENTER key within five minutes from when the sachet was added to the vial. 11. The meter will flash [CYNA] whilst the measurement is taken.
Measurement: Cyanuric Acid C401/301/201/102/101 Cyanuric Acid Measuring Hints & Tips 2.5.1 Sample Collection Samples may be collected in either plastic or glass bottles. It is advisable to wash the container with sample water before collecting the sample. Do not store the sample for more than 24 hours before conducting the analysis. 2.5.2 Sample Measurement Due to the nature of the test method, concentrations less than 5 ppm Cyanuric Acid are not detectable.
Measurement: Cyanuric Acid C401/301/201/102/101 be accurately prepared, or measured by a different method or instrument of higher precision and accuracy, then a Cyanuric Acid standard in the 6675 ppm range can be used. Please refer to section 3.3 Cyanuric Acid for details. 2.5.5 Chemistry Cyanuric Acid is commonly used to stabilize the chlorine present in swimming pool water.
Measurement: pH 2.6 • C401/301/201/102/101 pH (5.9-8.2 pH units) For water and wastewater (Phenol Red Method) 1. Switch the meter on by pressing the ON/OFF key. 2. Press the MODE key repeatedly until [PH] is displayed. 3. Press the READ/ENTER key to confirm the test parameter. The meter will read [STbY] indicating it is in stand-by mode, waiting for either blanking or measurement. READ ENTER 4. Select a clean and dry vial, un-screw the cap and fill with sample water to the line on the vial.
Measurement: pH C401/301/201/102/101 pH Indicator Phenol Red Add 20 drops of pH Indicator (Phenol Red) reagent 9. Invert several times to mix. Gently push the vial back fully into the sample well of the instrument, whilst again aligning the ▼ mark on the vial with the ▲ mark on the meter. 10. Wait for 1 minute and then press the READ/ENTER key within 3 minutes from when the time the reagent was added to the vial. 11. The meter will flash [PH] whilst the measurement is taken.
Measurement: pH C401/301/201/102/101 pH Measuring Hints & Tips 2.6.1 Sample Collection Samples may be collected in either plastic or glass bottles. It is advisable to wash the container with sample water before the sample is collected. For accurate results, analysis should be conducted as soon as possible after sample collection. 2.6.2 Sample Measurement The amount of sample used and the amount of reagent added is critical to obtaining correct test results.
Measurement: pH C401/301/201/102/101 2.6.5 Chemistry The monitoring and control of the pH of water is important in many different applications. This test method provides a quick and accurate method for measuring pH in the range pH5.9 - 8.2. A precise amount of phenol red indicator is added to a sample of water. The phenol red changes color from yellow at pH5.9 through to dark red at pH8.2. The amount of red color is related to its pH.
Calibration C401/301/201/102/101 3 CALIBRATION The C401/301/201/102/101 Colorimeter was calibrated and tested prior to leaving the factory. Therefore, it is possible for you to use the instrument directly out of the box. Re-calibration of the instrument is NOT recommended particularly in the case of chemical tests of very unstable and/or difficult to prepare calibration solutions. However, the meter allows you to calibrate in one point for each chemical test fitted in the instrument.
Calibration: Chlorine, Free & Total 3.2 C401/301/201/102/101 Chlorine, Free & Total 1. Prepare a Chlorine standard in the 4.1-5.0 ppm Cl2 range, measure and record the concentration value. 2. Ensure the meter is switched off. Press and hold the ZERO key while switching the meter on by pressing the ON/OFF key. The meter will momentarily flash the model number and then display the CAL annunciator at the top left corner of the screen indicating the instrument is in calibration mode. 3.
Calibration: Chlorine, Free & Total C401/301/201/102/101 10. Select another clean vial, un-screw the cap and fill it with 10 ml of the prepared Chlorine standard (fill up to the line on the vial). 11. Select a DPD Free sachet, or a DPD Total sachet, depending on the selected test. Open the sachet and tip the contents into the vial containing the calibration standard. 12. Replace the cap, ensuring it is screwed on finger tight to the vial.
Calibration: Chlorine, Free & Total C401/301/201/102/101 NOTE: If you wish to abort the calibration process, do NOT press the READ/ENTER key as in step 16. Press the ZERO key instead. The meter will display [AbRT] and CAL annunciator to signify that the calibration has been aborted without saving the calibration value. The meter will then return to the beginning of the user calibration as in step 4. CAL NOTE: If an error occurs during calibration, the display will present an error message.
Calibration: Cyanuric Acid C401/301/201/102/101 3.3 Cyanuric Acid 1. Prepare a Cyanuric Acid standard solution in the 66 - 75 ppm range and record the concentration value. 2. Ensure the meter is switched off. Press and hold the ZERO key while switching the meter on by pressing the ON/OFF key. The meter will momentarily flash the model number and then display the CAL annunciator at the top left corner of the screen indicating the instrument is in calibration mode. 3.
Calibration: Cyanuric Acid C401/301/201/102/101 11. Select another clean vial, un-screw the cap and fill it with 10 ml of the prepared Cyanuric Acid standard solution (fill up to the line on the vial). 12. Select a Cyanuric Acid sachet. Open the sachet and tip the contents into the vial containing the calibration standard. 13. Replace the cap, ensuring it is screwed on finger tight to the vial. Shake the vial for approximately one minute, until the powder has dissolved.
Calibration: Cyanuric Acid C401/301/201/102/101 NOTE: If you wish to abort this calibration process, do NOT press the READ/ENTER key as in step 17. Press the ZERO key instead. The meter will display [AbRT] and CAL annunciator to signify that the calibration has been aborted without saving the calibration value. The meter will then return to the beginning of the user calibration as in step 4. CAL NOTE: If an error occurs during calibration, the display will present an error message.
Calibration: pH C401/301/201/102/101 3.4 pH 1. Ensure at least 10 ml of clear pH7.0 buffer is available. 2. Ensure the meter is switched off. 3. Press and hold the ZERO key while switching the meter on by pressing the ON/OFF key. The meter will momentarily flash the model number and then display the CAL annunciator at the top left corner of the screen indicating the instrument is in calibration mode. 4. Press the MODE key repeatedly until [PH] is displayed.
Calibration: pH C401/301/201/102/101 11. Select another clean vial, un-screw the cap and fill it with 10 ml of the pH7.0 colorless buffer. (fill up to the line on the vial). Note: A proper calibration requires exactly 10 ml volume of pH7.0 buffer. 12. Select a bottle of pH Indicator (Phenol Red) reagent. Unscrew the cap and holding the bottle vertically; gently squeeze 20 drops of reagent into the contents into the vial. Replace the cap onto the reagent bottle. Be careful not to over-tighten the cap.
Calibration: pH C401/301/201/102/101 NOTE: If you wish to abort this calibration process, do NOT press the READ/ENTER key as in step 17. Press the ZERO key instead. The meter will display [AbRT] and CAL annunciator to signify that the calibration has been aborted without saving the calibration value. The meter will then return to the beginning of the user calibration as in step 4. CAL NOTE: If an error occurs during calibration, the display will present an error message.
Restoring Factory Calibration 3.5 C401/301/201/102/101 Restoring Factory Calibration The C401/301/201/102/101 Colorimeter allows you to reset the meter back to the factory default calibration values. This feature is extremely useful when there are errors in calibration or when you have new calibration standards. 1. With the meter switched off, press MODE and ON/OFF keys simultaneously for about 2 seconds. 2. The meter will momentarily flash the model number and [URST] (UserReset) and then display [No].
Restoring Factory Calibration C401/301/201/102/101 METER OFF Press MODE and ON/OFF keys simultaneously and hold for 2 seconds before releasing MODE ON OFF MODE Press MODE key to select YES or No To restore factory calibration READ ENTER READ ENTER Meter’s Model Number Meter’s Revision Number Measurement Selection Mode The meter is now ready for measurement Figure 9: Restoring Factory Calibration 34 To retain last calibration values without retrieving factory calibration.
Troubleshooting Guide C401/301/201/102/101 4 TROUBLESHOOTING GUIDE The C401/301/201/102/101 Colorimeter routinely performs selfdiagnostics, and will automatically generate messages to provide you with specific diagnostic information. These messages are for your use and do not indicate a reduction in the performance of the instrument or a failure of any component in the instrument, unless otherwise stated in this list.
Routine Maintenance C401/301/201/102/101 5 ROUTINE MAINTENANCE The supplied carrying case is optimal for protecting the instrument. If you do not plan on leaving the instrument in the supplied carrying case, when not in use, ensure that the instrument has been turned off and that a clean sample vial fitted with a black cap has been placed in the sample well. This will ensure that a minimal amount of dust and/or debris will be able to settle on the optics of the instrument. 5.
Accessories C401/301/201/102/101 6 ACCESSORIES The items shown below are recommended accessories and replacement parts for the instrument. Eutech Instruments Oakton Instruments Order Code. Order Code.
Specifications C401/301/201/102/101 7 SPECIFICATIONS Measurement Method Photometric Light Source Light Emitting Diode (LED) Wavelength 525 nm Detector Silicon photodiode Absorbance Range 0 – 2.5 Abs Photometric Precision +/- 0.0015 Abs 0 – 1.99 ppm (Free & Total Chlorine) Automatic Range Selection 2.0 – 6.0 ppm (Free & Total Chlorine) 5.9 – 8.2 pH 5 – 90 ppm (Cyanuric Acid) 0.01 ppm (0 – 1.99 ppm; Free & Total Chlorine) Resolution 0.1 ppm (2.0 – 6.0 ppm; Free & Total Chlorine) 0.1 pH (5.
Warranty & Return Of Items 8 C401/301/201/102/101 WARRANTY The C401/301/201/102/101 Colorimeter is supplied with a 2-year warranty from manufacturing defects. If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return – freight pre-paid – and correction will be made without charge. Eutech Instruments/ Oakton Instruments will determine if the product problem is due to deviations or customer misuse.
For more information on Eutech Instruments/ Oakton Instruments’ products, contact your nearest distributor or visit our website listed below: Oakton Instruments P.O Box 5136, Vernon Hills, IL60061, USA Tel: (1) 888-462-5866 Fax: (1) 847-247-2984 E-mail: info@4oakton.com Web-site: www.4oakton.com Eutech Instruments Pte Ltd Blk 55, Ayer Rajah Crescent, #04-16/24 Singapore 139949 Tel: (65) 6778 6876 Fax: (65) 6773 0836 E-mail: marketing@eutechinst.com Web-site: www.eutechinst.
