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In Vibration Monitoring System, Why the output of a Vibration Sensor (Probe / Proximitor) becomes negative in case of vibration measurement?

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Question added by Muhammad Mudassar Shabeer Mudassir , Plant Information Management System (Instrument & Control) Engineer , Yokogawa Middle East & Africa
Date Posted: 2017/10/19
Mohamed Elnakib
by Mohamed Elnakib , Instrumentation and control systems engineer -Al shabab power project Phase II , Pgesco

due to the usage of PNP transistors .

Akhil Kunnath
by Akhil Kunnath , Principal Engineer , Instrumentation , Mott Macdonald Pvt Ltd

Because the circuits for Bentley Nevada systems used PNP transistors and hence negative biased volatage is required

Tarik AITMOULOUD
by Tarik AITMOULOUD , Technicien commissionning , IRMA Algerie

Internal contact of probe closed

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