Model CA-600

The CA-600  Series Analyzers are a family of online sequential sampling analyzers that use Colorimetric or Ion Selective Electrode (ISE) technologies to perform an analysis. The analyzers can be configured to perform most colorimetric or ISE based laboratory analysis that use up to four reagents. These analyzers are easy to start up and use, simply connect the sample, waste and reagent lines and then power up the Factory Calibrated analyzer. Wall mount hardware is standard but an optional bench top stand with reagent holder is also available. Accessing information or customizing an analysis routine are easily accomplished with the simple, user friendly menu structure and touch screen interface.

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The analyzer has two separated enclosures with two lockable doors. The top enclosure, called the Electrical Enclosure, includes the main power supply, the controller PCB assembly and the touchscreen interface. The bottom enclosure, called the Liquids Enclosure, includes all components involved in the sample and reagent flow, mixing and reaction stages (sampling pump, reagent Micro Pumps and colorimetric reaction cell). Numerous analysis configurations can be programmed depending on the accessories and the  number of micro pumps mounted in the Liquids Enclosure.

The colorimetric analysis is based on the measurement of the color formation in the sample after the addition of reagents. The absorbance of the solution is measured through a Quartz Reaction Cell at a specific wavelength using a long life LED light source and a photometer. The absorbance is related to the sample concentration according to the Beer-Lambert Law.

The CA-600 Colorimeters make two measurements during an analysis cycle. The first measurement is of the raw sample which sets the base line for the compensation of color, turbidity and optical characteristics of the cell. The second measurement occurs after the color forming reagents have been added to the sample, mixed and adequate time has past to allow for color formation. The concentration is calculated using the difference between the two absorbance measurements and the stored calibration information in the analyzer.

These analyzers typically make a single measurement per analysis cycle, although a user defined calibration or cleaning sequence can be added to proceed the measurement every “X” number of measurement cycles. A standard sequence would consist of a drain and rinse cycle, sample acquisition, addition of reagents, mixing time, waiting period and measurement. Higher Range samples are accommodated using the optional dilution Module providing 10:1 or 50:1 dilution ratios. Several ISE’s require significant sample conditioning before an accurate measurement can be made. In these cases, the CA-600 analyzer facilitates the online measurement by reducing the amount of conditioning chemicals required and minimizing the associated volume of waste.

The CA-600 analyzer home screen displays the measured parameter, the status, % reagent volumes, time and menu choices. The on screen HELP menu includes information on Start Up, Shut Down, Start/Stop Commands, Calibration, Function List, Programming, Maintenance and Troubleshooting. Outputs include two alarm relays and a 4-20 mA channel.