FAQ No. FAQ00843
Question
When voltage is applied to
61F Floatless Level
Controller, it operates regardless of the actual liquid level. What is
the cause of the problem and how can it be corrected?
Answer
1. Causes in the Controller
When the electrode cables are wired close to power cables or in the same
duct, inductive noise from the power cables may cause the Controller to
operate without any liquid.
Countermeasures:
Wire the electrode cables and power cables separately and avoid wiring
closely.
Also, properly ground the common voltage.
2. Causes in the Electrodes:
Some contaminant such as trash is entangled
with the electrodes and shorting the electrodes.
The electrodes are being shorted within the
Electrode Holder, possibly by condensation.
Countermeasures:
Separate the electrodes and install again.
3. Causes in the Wiring
Operation is not recovering due to a leakage current caused by parasitic
capacitance to ground in the cables.
The cables' surface area increases as the cable length increases and the
parasitic capacitance to ground increases with more conductors, making it
easier for poor recovery to occur.
Countermeasures:
Use a 61F Long-distance Controller.
Other Level Controller
FAQs
 Is it acceptable to wire the 61F Controller’s electrode cable and power cable in the same duct?
With a 61F-G1, the water level of a water supply is above the E2’ height, but the pump does not operate. What is the cause of the problem and how can it be corrected?
The 61F Controller’s power supply is ON, but the Controller does not operate even though the liquid level reaches the detection level. What could be causing this problem?
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