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The SciPro automates pH maintenance as well as titration in large-volume reactor applications. The SciPro is connected to a Process pH Transmitter (with 4-20mA output). The SciPro provides a user-definable pH-Setpoint and pH-Bandwidth, which the SciPro maintains by adding small increments of reagent, i.e. acid or base. The reagent addition rate is automatically reduced as the pH-Setpoint is approached. The userdefinable pH-Delta represents the pH range during which the pump speed is automatically reduced for optimal pH control. The pH-Setpoint can be maintained indefinitely within a 0.10 pH unit range, i.e. smallest selectable pH-Bandwidth.

For process titration applications, the user-definable pH-Setpoint represents the titration endpoint, e.g. pH = 7.00 for a simple acid / base neutralization. The SciPro adds reagent incrementally to the reactor until a stable pH-endpoint is reached. A userdefinable Endpoint Delay represents a time interval during which a stable pH must be maintained. The Endpoint Delay feature is particularly useful in large volume reactor applications where solution homogenity is more difficult to achieve. An appropriate Endpoint Delay will ensure that solution homogenity has been obtained before the titration is terminated at the end of the delay period.

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