Electrical Troubleshooting Quiz - April 21, 2015 Guru3Ds/iStock/Thinkstock

Electrical Troubleshooting Quiz - April 21, 2015

At random intervals, the “level” will go up and down for several seconds at a time.

A major process area in the plant has been experiencing phantom problems. Tanks that appear nearly empty on the control console suddenly show full. At random intervals, the “level” will go up and down for several seconds at a time. This lasts for several minutes, but then stops completely.

The instrument techs have calibrated the level control loop and every instrument on it multiple times. They have also verified there’s no ground loop. Now one of the senior opera

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