Related Manuals for Chemtrac CCA3100
Summary of Contents for Chemtrac CCA3100
- Page 1 OPERATIONS MANUAL OPERATIONS MANUAL OPERATIONS MANUAL OPERATIONS MANUAL CCA3100 CCA3100 CCA3100 CCA3100 Coagulant Charge Analyzer Revised 04/11/12 MQ...
- Page 2 CCA 3100...
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Page 3: Table Of Contents
TABLE OF CONTENTS SYMBOL KEY & SAFETY PRECAUTIONS PAGE 4 WARRANTY INFORMATION PAGE 5 1.0 COAGULANT CHARGE ANALYZER PAGE 6 1.1 INTRODUCTION Page 6 1.2 BACKGROUND Page 6 1.3 STREAMING CURRENT AND DOUBLE LAYER Page 7 2.0 SPECIFICATIONS AND COMPONENTS PAGE 9 2.1 SPECIFICATIONS Page 9... -
Page 4: Symbol Key & Safety Precautions
SYMBOL KEY Risk of Electric Shock Note SAFETY PRECAUTIONS BEFORE ATTEMPTING UNPACK, OPERATE THIS INSTRUMENT, PLEASE READ THIS ENTIRE MANUAL. MAKE CERTAIN THE UNIT IS DISCONNECTED FROM THE POWER SOURCE BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY COMPONENT. FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN PERSONAL INJURY OR DAMAGE TO THE EQUIPMENT. -
Page 5: Warranty Information
The warranty cannot be guaranteed if the customer fails to service and maintain the equipment in accordance with Chemtrac’s written instructions and policies, as stated in the Operations Manual. CCA 3100... -
Page 6: Coagulant Charge Analyzer
1.0 COAGULANT CHARGE ANALYSIS 1.1 INTRODUCTION The Coagulant Charge Analyzer (CCA) can provide valuable data concerning charge demand and coagulation for water treatment systems. The CCA’s output is the STREAMING CURRENT VALUE (SCV), a term which is commonly interchanged with “charge” or “charge measurement.”... -
Page 7: Streaming Current And Double Layer
1.3 STREAMING CURRENT AND THE DOUBLE LAYER Surface chemistry and physics are important to water treatment chemistry and the destabilization of colloidal particles that naturally occur in water. One branch of surface chemistry is colloidal chemistry, which is the study of a stable combination of particles that are dissolved or suspended in a second substance. - Page 8 FIGURE 1 The Double Layer CCA 3100...
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Page 9: Specifications And Components
2.0 SPECIFICATIONS AND COMPONENTS 2.1 SPECIFICATIONS Dimensions 8.5”W x 9.2”D x 26”H Weight 18 lbs. (8.2 kg) Power Requirements 115VAC, 50/60Hz, 410 mA Optional 220VAC, 50/60Hz, 205 mA Environmental Temperature 15-45° ° ° ° C Enclosure Aluminum Information Derived Streaming Current in mV Measured Parameter Streaming Current Sample... -
Page 10: Probe Assembly
2.2 PROBE ASSEMBLY The CCA consists of a probe assembly and a signal processor. The probe assembly is comprised of the piston and sensor, which houses the electrodes that measure the streaming current. The signal processor is the circuit board inside the CCA. A simplified picture of the probe assembly is presented in Figure 2. - Page 11 FIGURE 2 Probe Assembly It may then be assumed that the surfaces of both the piston and cylinder become adsorbed or coated with particles from the sample. (There are other ways of viewing this phenomenon, but this assumption provides a workable explanation.) These particles, namely the anionic species, adhere to the piston and cylinder walls by Van der Waal’s forces.
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Page 12: Signal Processing
therefore, the fluid motion is upwards), and the attached particles are negatively charged (and, therefore, the outer charged layer is positive), then according to convention the electrical current is traveling from the lower to the upper electrode. It should be clear that the STREAMING CURRENT VALUE is dependent on the fluid direction and velocity. - Page 13 because the calibration would be sensitive to small differences in the physical dimension of the annulus. Another reason the instrument is not calibrated to display a discrete charge value is that the instrument is sensitive to differences in charge distributions that vary from simple systems to complex systems.
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Page 14: Operation
3.0 OPERATION The CCA 3100 offers two power switches. The first is located below the face plate and supplies power to motor that drives the piston. The second power switch is located on the back of the unit near the power cord connection. The switch in back allows the operator to turn the power off entirely to the unit. -
Page 15: Standard Cleaning Procedure
banana plugs are no longer visible. This will ensure a good electrical connection and prevent fouling of the connections. 5. Tighten the thumbscrew to secure sensor. 3.1.3 Standard Cleaning Procedure With some particles, cleaning is easily accomplished by rinsing with tap water. Others (especially cationic particles) are tenacious and must be removed with fairly vigorous cleaning. -
Page 16: Replacement Parts
3.2 REPLACEMENT PARTS Figure 4 illustrates the CCA3100 parts identification with part numbers. FIGURE 4 Parts Identification CCA 3100... -
Page 17: Practical Charge Measurement
4.1 CONDITIONING Chemtrac recommends that the sensor and piston be conditioned before the actual charge measurement is performed. Conditioning will replace foreign molecules with ones that are similar to the sample being tested. Additionally, one may consider that conditioning will “coat”... -
Page 18: Charge Demand (Titration)
4.3 CHARGE DEMAND (TITRATION) To determine the charge demand of a sample, a coagulant of opposite charge is added until the isoelectric (0.00) point is achieved. The coagulant is made-up to a known concentration and referred to as the “titrant.” The CHARGE DEMAND refers to the amount of titrant, in milliliters, that is required to bring a sample to the isoelectric point. -
Page 19: Suggested Titration Procedure
4.3.1 Charge Demand Procedure Please read this procedure completely and thoroughly prior to starting the titration. Operators may make adjustment specific to their facility after determining how the CCA unit works. Purpose: The purpose of this procedure is to demonstrate how quickly the CCA can ballpark chemical dosages in place of routine jar tests. - Page 20 Procedure: 1. Add 2000 mls of raw water to a 2 L beaker. 2. Place the beaker under the CCA. Turn on the stirrer, the CCA and allow the unit to stabilize. Slow changes in the hundredths decimal place are acceptable. 3.
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Page 21: Suggested Charge Measurement Procedure
4.3.2 Suggested Charge Measurement for Process Control: 1. Collect a sample from the flash mix – the chemical must be thoroughly mixed with the raw water prior to your sample point. Also, the plant must be producing good quality water as determined by turbidity, pH, alkalinity, etc. Measure 2000mls into a 2 L beaker and place under the CCA probe. -
Page 22: Applications
4.4 APPLICATIONS Effective utilization of the CCA 3100 is the responsibility of the operator. Ingenuity and creativity are required. Charge analysis can be utilized on the following sample locations: 1. Test the raw water to determine coagulant demand by titration. 2.
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