With the continuous monitoring of the chromatographic detector output signal, the mobile phase is recycled to the solvent reservoir when the baseline is below a threshold value. If the value is exceeded, the flow is redirected to waste, accounting for the transport time from the detector to the switching valve. When the signal returns below the threshold, the mobile phase is shifted back to the reservoir. In addition, the SRS Pro is designed to recycle the mobile phase only when switched on. In case of a power failure, the valve is automatically positioned in the waste position and the mobile phase reservoir remains uncontaminated.
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