Calculation of solenoid coil resistance
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It is common to encounter the need to measure solenoid coils on site; how can the resistance of a solenoid coil be calculated accurately?
Measurement under power and wire disconnection. The wire diameter and number of turns for solenoid valves vary depending on the brand and model.
Measurement is also used to determine whether there is a short circuit or a low resistance; the specific resistance values vary depending on whether it is AC or DC, as well as the voltage level and the manufacturer, but generally these values can be ignored. Even if it’s a tube, as long as it doesn’t go over the limit.
The nameplate on the solenoid valve indicates the voltage, current, and power; by doing some calculations, it is possible to estimate the resistance value when the circuit is open
Why is it necessary to know the resistance of the solenoid valve?
If there is a problem with the solenoid coil, it can be determined by checking for things such as short circuits or open circuits, or conditions that are neither fully short nor fully open; this can be done by measuring the resistance