Agilent Technologies DC110 Especificaciones descargar pdf (Pagina 32)

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Compensation and Measurement: There are three measurement methods for the 16451B. They are the Contacting

Electrode Method (used with 16451B's rigid metal electrode, without any electrodes on the material under test), the

Contacting Electrode Method (used with thin film electrodes made on the material under test), and the Non-Contacting

Electrode (Air Gap method). Select the suitable measurement method and the suitable electrode for the material under test

according to the following table.

Summary of Measurement Method

Open and short compensations are recommended in combination with the cable length compensation before measure-

ment.henmeasuringaboe5MHzwiththe4285Aorthe4294A*loadcompensationisalsorecommended.Firstset

the instrument's cable length compensation function to 1 m. Then, open and short compensation is performed by using the

furnished electrode attachment. Load compensation is performed, by preparing a working standard. After performing open,

short and load compensations, the MUT is sandwiched by the parallel electrodes and the capacitance is measured.

Relative permittivity is calculated from the measured capacitance in the following manner:

 C

r'= ———————

  (—)

 ε

r' : Relative permittivity

: Capacitance (measurement data)

: 8.854  10

–12

[F/m]

: Average thickness of test material

d : Diameter of guarded electrode

*Formoreinormationonloadcompensationwiththe4294Areertosection6calibrationothe4294Aoperationmanual

(Fixture Compensation when the 16451B is used) and section 13 of the 4294A programming manual (Measuring Dielectric

Materials).

Up to 110 MHz (4-Terminal Pair) Material

Measurement

Method

Contacting Electrode Method (used

with Rigid metal electrode)

Contacting Electrode Method (used

with thin ﬁlm electrode)

Non-contacting Electrode Method

Accuracy Low .................................................................................................................................................................................→ High

Operation Simple ............................................................................................................................................................................→ Complex

Applicable

Materials

Thick, solid and smooth materials Materials on which thin ﬁlm can be

applied without changing its charac-

teristics

Thick, and soft materials Rough

materials also

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 79 80

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Agilent Technologies DC110 Especificaciones Pagina 32

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