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Question
Why is the long common electrode always grounded in the Floatless Level Controller 61F's connection diagrams?
Answer
There are three reasons for this ground.
1. Preventing Improper Operation Due to Inductive Noise
Since there is just a weak current (about 1 mA at 8 VAC) between the 61F Controller and the electrodes, it is easy for inductive noise to cause improper operation when there is no ground.
2. Protecting the 61F Controller from Surge Voltage
The common electrode must be grounded properly to protect the 61F Controller's internal circuits from surges caused by lightning or other equipment.
3. Preventing Electric Shock
The ground is needed to prevent electric shock in case of electric leakage.
Other Level Switches FAQ
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How do I secure underwater Electrodes?
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Is there a way to tell whether the sensitivity of 61F Floatless Level Controllers is suitable for the liquid being used?
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Can you explain the wiring for combining 61F-G Floatless Level Controllers with an upper-limit float switch and a lower-limit float switch in order to control upper and lower limits?
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