sophiecentaur said:As you mention a Clamp-on Ammeter, you are clearly considering pretty low frequencies
Idea04 said:With no inductance in the circuit the magnetic field will collapse.
Idea04 said:In a series LC resonant circuit the capacitor acts to cancel out the inductance of the the circuit. With no inductance in the circuit the magnetic field will collapse. So my question is, with this collapse of the magnetic field will it be be harder to measure the current in the circuit with a clamp on ammeter that measures the current from the magnetic field it develops around the conductor?
Some AC clamp on ammeters are good enough only up to 400-500 Hz. Readings at 1 kHz can be quite off with them. Do you measure circuit at steady state AC power or want to measure its' transient response? What exactly is your circuit and how do you know resonant freq is below 1 kHz?Idea04 said:When calculating the capacitance for the circuit I did include the inductance of the wire. The resonate frequency is less than a kilohertz. I measured the circuit inductance with and inductance meter and the value dropped below the inductance of a single wire. I just wanted to be sure because that the clamp on meter would still be accurate.
What sort of Capacitance are you using in your calculations? Resonant frequency is 1/(2π√(LC))Idea04 said:When calculating the capacitance for the circuit I did include the inductance of the wire. The resonate frequency is less than a kilohertz. I measured the circuit inductance with and inductance meter and the value dropped below the inductance of a single wire. I just wanted to be sure because that the clamp on meter would still be accurate.
Probably you have situation where adding the cap decreases or increases overall impedance/reactance of the circuit. That depends on parallel or series connection of two reactive components with respect to the source. That's a normal thing, your ammeter is OK.Idea04 said:The capacitance in the circuit is 500uF, the inductance of the circuit including the wires is 810.56uH and the resonant frequency is 250Hz. I measured the inductance of the wire to be 13.5uH with a MTP MS5300 inductance meter. The clamp meter I am using is good for frequency from 50Hz to 500Hz. I wanted to make sure that the clamp on ammeter was reading properly because without the capacitor the current output was higher than the supply voltage of the circuit, and with the capacitor the current was much lower than the supply voltage. But the impedance with the capacitor was much lower.
No, that is not quite true. What happens is that a energy flows from current in the inductance to voltage across the capacitor and back again. Since the voltage and current is 90° out of phase, no power is involved. The amplitudes can be quite high, though.Idea04 said:In a series LC resonant circuit the capacitor acts to cancel out the inductance of the the circuit.
But it's true that the Reactance of one will cancel out the reactance of the other at resonance.Svein said:No, that is not quite true. What happens is that a energy flows from current in the inductance to voltage across the capacitor and back again. Since the voltage and current is 90° out of phase, no power is involved. The amplitudes can be quite high, though.
A series lc circuit is a type of electrical circuit that consists of a resistor (R) and a capacitor (C) connected in series. When an alternating current (AC) source is connected to the circuit, the capacitor stores energy and the resistor dissipates energy, resulting in a lag between the voltage and current. This lag is known as the phase angle and it can be used to calculate the impedance of the circuit.
A clamp-on ammeter is a type of electrical measuring instrument that is used to measure the current flowing through a conductor without having to physically disconnect the conductor. It is commonly used in situations where it is difficult or unsafe to break the circuit to insert a traditional ammeter. The clamp-on ammeter works by using a magnetic field to measure the current passing through the conductor.
To measure the current in a series lc circuit using a clamp-on ammeter, simply clamp the ammeter around one of the conductors in the circuit. The ammeter will measure the current flowing through the conductor and display the value on its screen. Make sure to position the clamp-on ammeter perpendicular to the conductor for accurate readings.
The accuracy of a clamp-on ammeter can be affected by factors such as the position of the ammeter on the conductor, the orientation of the ammeter relative to the conductor, and the presence of other nearby electrical or magnetic fields. It is important to carefully follow the manufacturer's instructions and guidelines for accurate measurements.
Most clamp-on ammeters are designed to measure AC current only, but there are some models that can measure both AC and DC current. It is important to check the specifications of the ammeter to ensure that it is capable of measuring both types of current before use. Using a clamp-on ammeter to measure DC current is similar to measuring AC current, but the polarity of the leads must be correctly aligned with the polarity of the current for accurate readings.