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What's the 'pin out' for the Diagnostic port? (3.55 mm 'stereo' plug)

Question asked by gmylin62 on Jun 10, 2020
Latest reply on Jun 26, 2020 by gmylin62

We'd like to log pressure from our PCG-750 gauge which has a 3.55 mm serial connection. Found nearly everything else needed in the "RS232C Serial Interface for Pirani Capacitance Diaphragm..." (Manual No. TQRa78e1), but cannot find the corresponding 'pin out' anywhere. Any help would be appreciated.