Flexibility, reliability and low maintenance are among the benefits offered by the EXA PH402 pH converter. Designed to meet the exacting requirements of measuring pH and ORP in the modern industrial environment, it contains many features to ensure the best precision whatever the application. This 4-wire unit is housed in a robust IP65 field mountable case. Two mA outputs, four relays, digital communication and a clear LCD make the PH402 a truly comprehensive package.
The PH402 features PI control on both the auxiliary mA outputs and the pulse proportional relay outputs, thus avoiding the need for a separate controller.
The famous EXA sensor diagnostics are enhanced in the PH402, including improved impedance testing, stability and response checks, and a personal computer logbook feature to record events like calibration data and diagnostic messages, show trends and help predict sensor failure.
The sensor washing cycle also provides an on-line response test, giving an immediate indication of sensor deterioration. Microprocessor-aided calibration uses internal buffer tables and stability checking to ensure maximum accuracy with minimum effort.
Process temperature compensation enhances accuracy in applications where the influence of temperature is seen in process changes. Also, pH & ORP or rH measurements can be made simultaneously with an appropriate sensor combination.
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