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Today's automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for information about the CCST program. This question comes from the Level I study guide, Domain 3, Troubleshooting. Level I represents a professional who has a five-year total of education, training, and/or experience.
A continuity check should take place prior to hookup of a field transmitter to the control room so the technician:
a) can make sure the transmitter is being hooked up to the proper indicator/controller
b) can make sure the proper voltages are present
c) can make sure that he continues hook-up on a particular transmitter
d) knows he may connect another transmitter to the loop circuit
e) none of the above
A continuity check is a test performed on a length of finished wire or cable to determine if the electrical current flows continuously throughout the length. Each conductor may also check off against each other to ascertain that no shorts exist. This makes sure the transmitter is hooking up to the indicator that one is expecting it to hook up to, which is to say, they are connected.
The best answer is A.