LCR meter is an electronic testing device used to gauge the inductance (L), capacitance (C), and resistance (R) of an electronic component. These three characteristics are commonly referred to as the passive attributes of an electrical circuit and are indispensable for the proper operation of various electronic devices. Inductance is a quality inherent to a conductor that resists alterations in current and arises from the magnetic field produced by current passing through the conductor. Capacitance refers to an elements capacity to store electrical energy and originates from the separation of opposing charges across a dielectric material. Resistance represents the opposition to current flow within a conductor and is the result of electron collisions with the conductors atoms. LCR Meters from Tessio brand come in many different types, each designed to suit specific test environments, accuracy requirements and use cases are following:

• Handheld-type LCR Meter
• Benchtop-type LCR Meter
• With Continues frequency (100Hz to 100MHz resolution : 0.01Hz)
• With Fixed frequency (100Hz, 120Hz, 200Hz,..........)

Tessio's product is mainly launch in Benchtop type range with high-accuracy, reliable to use for laboratory quality control to a customer and also in production line, R&D section so on, etc.

Impedance Analyzer is an electronic measuring instrument used to measure and analyze the alternating current resistance (impedance or Z value) of various devices and materials. It can continuously change the frequency of the electrical current (frequency sweep) to observe how the resistance changes at each frequency.

The basic working principle of an impedance analyzer is by inputting an electrical signal and measuring the response of the device. There are four main steps:

- AC Signal Generation: The instrument outputs an alternating voltage (V) with a constant frequency and magnitude to the device under test (DUT).

- Voltage and Current Measurement: The instrument simultaneously measures the voltage across the device (V) and the current flowing through the device (I).

- Phase Shift Detection: In AC, voltage and current may not occur simultaneously (phase shift occurs due to capacitance (C) or inductance (L)). The instrument measures this phase angle (theta).

- Conversion of the result to impedance (Z): The instrument uses Ohm's law (Z = V / I) in conjunction with the phase angle. To calculate the total resistance (Z) and separate it into real resistance (R), virtual resistance (X), as well as capacitance (C) and inductance (L).