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...for accurate, in situ calibration
of on-line conductivity and pH monitors The Martek Mark 22 In Situ Calibrator is a completely portable analyzer capable of verifying the performance of on-line conduct-ivity and pH monitors. Designed to eliminate grab sample analysis and the inherent errors due to carbon dioxide contamination, the Mark 22 can be calibrated in the laboratory to traceable NIST and ASTM standards, then carried to the sample panel for direct measure-ment of the sample stream. This light weight analyzer contains its own rechargeable battery power supply, internal clock, memory, and both analog and digital communications port. The Mark 22's large back-lit display provides both raw and temperature-compensated data in direct engineering units while its menu-driven software makes calibration and data logging easy and straightforward. Other Mark 22 features include: • Autoranging conductivity measurements • Three user-selectable temperature compensation formulas for conductivity • Solution compensation for both conductivity and pH • Automatic electronic temperature calibration • Up to four pre-set cell constants • Certified Calibration Plugs for electronic calibration of conductivity • Data storage in non-volatile RAM with RS232 digital output at user-selectable printing intervals • 0-1 volt analog recorder output • Removable carrying strap and built-in stand |
 While Martek Instruments offers its own certified, unbreakable conductivity reference cells and pH sensor, the Mark 22 can also be used with any conductivity reference cell or pH electrode regardless of manufacturer. The ability to provide traceable calibration and verification data make the Mark 22 ideal for high purity water processes in nuclear and high-performance fossil fuel power plants; condensate polishing systems and demineralizers, semiconductor and pharmaceutical manufacturing plants; and other industrial applications.  |
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