Bk-precision 875B - Manual Manual do Utilizador descarregar pdf (Página 10)

(1) Turn unit on.

(2) Set the mode switch to the “LCR” position.

(3) Set the Fun ction/Range switch to the appro priate resista nce

range. If the value of resistance is unknown, select the 2 ohm

range.

(4) Using a short piece of w ire, such as a paper clip, temporarily

connect the po sitive and nega tive m easurement terminals

together. A lternatively, if t he clip leads w ill b e u sed for the

measurement, plug them into t he banana jacks and connect

the clips together.

(5) Use a small, flat-blade screwdriver and slowly turn the “O A dj”

control to calibrate the display for a zero reading. Remove the

calibration short.

(7) Insert the resistor leads into the component test sockets at the

front of th e meter. If the leads are too short, use t he alligator

clip leads provided with the instrument to connect to resistor.

2.4 Measurement Parameter Conversions

The paramet er va lue for a co mponent mea sured in a parallel

equivalent circuit and tha t value me asured in a series equivalent

circuit may be diff erent fro m ea ch o ther. Th is means t hat the

parallel-measured capacitance (inductance) of any given capacitor

(inductor) w ill no t b e equa l t o the ser ies-measured capacitance

(inductance) unless

the dissipation factor of the capacitor (inductor)

equals zero. The equat ions in t he tab le be low sh ow the

relationship be tween the para llel- a nd the serie s- m easured

parameters of any given components:

Dissipation Factor Equations

(See table 1)

E.G.1: With a m easurement fre quency of 1KH z, a para llel mo de

capacitance of 1000pF with a dissipation factor of 0.5 is equal to a

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 36 37

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Bk-precision 875B - Manual Manual do Utilizador Página 10