Control and Instrumentation Engineer Study Guide
Are you an Control and Instrumentation Engineer ? Recently joined as a Fresher or Trainee engineer in Instrumentation department ? then this article helps you to get an overall outlook...
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History of 3-15 psi, 10-15 mA, and 4-20 mA signals
Before 4-20 mA the signals were 3-15 psi and 10-50 mA. These signals all have a “live zero” (3 psi, 10 mA, and 4 mA) rather than a “dead zero”...