Atec Agilent-16047A - Manual (Page 73)

68
16454A Magnetic Material Test
Fixture
Terminal Connector: 7 mm
Dimensions (approx.):
(Large Test Fixture) 30(D) x 35(H) [mm]
(Small Test Fixture) 24(D) x 30(H) [mm]
Weight (approx.):
(Large Test Fixture) 140 g
(Small Test Fixture) 120 g
Measurement Accuracy (typical.):
Up to 3 GHz (7 mm) Material
Description: The 16454A is designed for accurate perme-
ability measurements of toroidal-shaped magnetic materi-
als. Since the construction of this fixture creates one turn
around the toroid (with no magnetic flux leakage), the
need of winding a wire around the toroid is unnecessary.
The following figure shows the one-turn mechanism and
how complex permeability is calculated from it.
Complex permeability is calculated from the inductance
with and without the toroid. When E4991A with option
E4991A-002 is used as the measurement instrument,
direct readouts of complex permeability are possible. In
addition, it is furnished with a small and a large fixture to
adapt to a wide range of sizes.
Applicable Instruments: E4991A with Opt.E4991A-
002, (4291A/B with Opt.4291A/B-002)*
* denotes the instrument is obsolete.
Frequency: 1 kHz to 1 GHz,
DC Bias: -500 mA to +500 mA (max)
Operating Temperature: -55°C to 200°C
When Option E4991A-007 temperature characteristic test
kit is used with E4991A, the operating temperature range
is between -55°C and +150°C. The temperature charac-
teristic test kit is unavailable for the 4294A.
Material Size: See figure below.
Typical Permeability (µr’) Measurement Accuracy
(@ h* ln c/b = 10)
Typical Loss Tangent (tan δ ) Measurement Accuracy
(@ h* ln c/b = 10)
Permeability measurement method of 16454A
Material size