LCR Inductance & Capacitance Meters

“Tomorrow’s Instruments Today” — “For Good Measure” ^®

A Leading South African Test and Measurement Instruments Supplier

“For Good Measure”^®

TMI, Established—1982

Test and Measurement Instruments C.C.

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CK 85/07464/23

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Brand Names

T + M®

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Ph: +27 (011) 683 4365

Fax: +27 (011) 683 4461

E-mail: t.m.i@iafrica.com

www.instrumentsgroup.co.za

Physical Address:

1st Floor, TMI House,

37 Garden St,

Cnr 160 Bellavista Rd,

Turfclub, Johannesburg, 2135

SOUTH AFRICA

Postal Address:

P.O. Box 1416,

Southdale,

Johannesburg, 2135,

SOUTH AFRICA

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T.M.I.

This Month’s Special

Click i3 for Specification.

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E-Series Imagers

Clearance Sale:

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Accute PC-Based Instruments from Test andMeasurement Instruments C.C.

T + M^®

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Thermography—Thermal Imager— Infrared Camera.

FLIR i3 — Smallest , Lightest, most affordable camera “point-shoot-detect”. Introductory Nett Price of

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LCR Meters

Part No: DM-9093

LCR + DMM, 2 mH to 20 mH, 2nF to 200uF, 200Ohm to 20 Mohm, Temperature, Frequency, Transistor Test & RS232, Intelligent Functions

Lutron

Part No: TH2821B

Portable 4 wire, 4 Bins comparator. L, C, R, Z, D and Q Measurements with 0.3% Basic Accuracy. Capable of Low Dissipation Capacitance Measurements.

Lodestar

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Notes on LCR Meters.

LCR meters and impedance meters measures inductance (L), capacitance (C), and resistance or impedance (R). Instruments used for LCR measurements are built as universal and multifunctional devices. They enable automatic (triggered or cyclic) measurements of L, C, and R as well as other parameters such as quality and dissipation factors. Instrument type, measurement specifications, test signal or source characteristics, and other measurements are important parameters to consider when searching for LCR meters and impedance meters. Additional specifications that are important to consider include user interface options, display options, additional output options, general features and functionality and environmental parameters.

Instrument types include hand held, portable, and fixtured or permanent. General measurements that are important to consider when searching for LCR meters and impedance meters include resistance or impedance range and accuracy, capacitance measurement range and accuracy, and inductance measurement range and accuracy. Resistance or impedance is the opposition that a device or material offers to the flow of current, equal to the voltage drop across the element divided by the current through the element. Also known as electrical resistance. Also called impedance, parameters are Z or Rac. A capacitor is a system of two conducting electrodes, having equal and opposite charges separated by a dielectric. The capacitance, C, of this system is equal to the ratio of the absolute value of the charge, q, to the absolute value of the voltage between bodies as: C= q/v.The unit of capacitance, the farad, is a large unit; practical capacitors have capacitances in microfarads, nanofarads and picofarads. Self-inductance is defined as the relation between current (i) flowing through the coil and voltage (v) measured at its terminals. Also the property of an electric circuit or of two neighboring circuits whereby an electromotive force is generated in one circuit by a change of current in itself or in the other. One Henry (1 H) is the inductance of a circuit in which as electromotive force of one volt (1 V) is induced, when the current in the circuit changes uniformly by one ampere (1 A) per second (1 s).

Test signal or source characteristics that are important to consider when specifying LCR meters and impedance meters include basic accuracy, number of digits displayed, number of steps, test signal or frequency range, and response time. Basic accuracy is the typical value at 1 kHz. The number of digits displayed refers to the number of digits on the readout. Number of steps in the measurement is important to consider. The test signal frequency range is the frequency range at which the instrument operates. Response time is the amount of time it takes for the LCR meters and impedance meters to make and display measurements.

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