The 1482 is an accurate, highly stable standard of self-inductance for use as a low frequency reference or working
standard in the laboratory.Records extending over 40 years,including those of inductors that traveled to national laboratories in several countries for calibraƟon,show long-term stability well within±0.01%., typically <10 ppm/year.
Features:
• A standard for naƟonal laboratories
• Stability within ±0.01% per year and
typically <10 ppm/year
• Values from 1 μH to 10 H
• Standard for quality factor (Q)
• Low, known temperature coefficient
• Self-shielding toroidal design
• Calibrated at mulƟple frequencies
• Ceramic non-magneƟc core
Accuracy of Adjustment: Adjustment is performed at one specific frequency, see table for
accuracy and frequency.
Calibration: A certifi cate of calibration is provided with each unit, giving measured values of
inductance at 100, 200, 400, and 1000 Hz, with test
conditions and method of measurements specifi ed. These values are obtained by comparison, to
a precision, typically, of better than ±0.005%, with
standards whose absolute values, traceable to an
SI, are known to an accuracy typically better than
±(0.02%) at 100 Hz. Measurement uncertainties
are listed on certifi cate.
Stability: Inductance change is less than ±0.01%
per year.
DC Resistance: See table for typical values. A measured value of resistance at a specifi ed temperature
is given on the certifi cate of calibration.
Low-Frequency Storage Factor Q:
See table for typical values of Q at 100 Hz (essentially from dc resistance). An individual value of Q is
given on each certifi cate of calibration.
Temperature Coefficient of Inductance: Approximately 30 ppm/°C. Small temperature corrections
may be computed from resistance changes.
A 1% increase in resistance, produced by temperature increase of 2.54°C corresponds to 0.0076%
increase in inductance
Resonant Frequency: See table for representative
values. A measured value is given on the certifi cate
of calibration.
Maximum Input Power: For a rise of 20°C, 3 W; for
precise work, a rise of 1.5°C, 200 mW. See table for
corresponding current limits.
Terminals: 5-way gold-plated, tellurium-copper binding posts that feature low resistance. Terminals have
standard ¾-in spacing with removable gold-plated
ground strap.
Dimensions: 16.6 cm H x 16.6 cm W x 20.4 cm D
(6.5" H x 6.5" W x 8" D)
Weight: 5.3 kg (11.5 lb) net, 6 kg (13 lb) shipping
