Specifications

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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 permeability mea-
surements of toroidal-shaped magnetic materials. Since the con-
struction 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 permeabili-
ty are possible. In addition, it is furnished with a small and a large
fixture to adapt to a wide range of sizes.
Applicable Instruments: (4294A + 42942A, E4991A with Opt.
E4991A-0024291B*withpt.4291B-002***
*denotestheinstrumentisobsolete.
**applicableinalimitedreuencyrange.
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 characteristic 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 ) Measurement Accuracy
h*lnc/b10
Permeability measurement method of 16454A
Material size