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Hp agilent 4271A lcd 1MHZ digital lcr meter guaranteed
HP Agilent 4271A LCD 1MHz Digital LCR Meter Guaranteed
* Automatic high speed measurements of low value L (1000 nH-1000 H)
* Dissipation factor or conductance is also measured. Basic measurement accuracy of 0.1% to 1.2%
* Minimum resolution of 0.1 nH, 0.001 pF or 1 mohm
The HP Agilent 4271A has four-terminal pair measurement technique is used to reduce errors due to electromagnetic coupling of leads as well as reducing residual inductance or stray capacitance.
"The first digital instrument dedicated to component tests and manufactured by HP was the 4270A Capacitance Bridge. It was fully automatic with a five-digit Nixie readout (this example is a later version with LCD display) of capacitance from 18 pF to 1.2 F and a .001 pF resolution.
One year later, the specifications of the first HP Digital LCR Meter were defined by the very fast evolution of the first generation of integrated circuits at this time. The 4271A was especially designed for the measurement of low-value components in integrated circuits and thin-film hybrid circuits, as well as of discrete components. The 4271A LCR Meter typically makes five or more readings per second to display capacitance from 0.001 picofarad to 19.000 nanofarads and inductance from 0.1 nanohenry to 1900.0 microhenry. The HP 4271A uses a four-pair measurement technique to reduce errors caused by stray capacitance, residual inductance, and mutual inductance of the test leads."
Pic 1. Shows a cap marked 52PF +/-2%
Pic 2. Shows an inductor marked 3.3uH +/-5%
