1482 Series Standard Inductors are the same specs as GenRad inductance standard.
These inductors are accurate, highly stable standards of self inductance for use as a low frequency reference
of working standard in the laboratory. Records extending over 25 years, including those of inductors that
traveled to national laboratories in several countries for calibration, show long-term stability well
within ±
0.01%.
The 1482 Series Standard Inductors are the standard of choice in metrology labs, and still used today by
standards bodies around the world.
1482 Series Standard Inductor.
Model | Description |
---|---|
1482 | 1482 Series Standard Inductor |
Uniformly wound toroid on a ceramic core.
Packed in a mixture of ground cork and silica gel.
Cast with a potting compound into a cubical aluminum case.
Calibration Certificate Traceable to NIST.
1482-B 100µH
1482-E 1mH
1482-H 10mH
1482-L 100mH
1482-P 1H
1482-T 10H
Each inductor is a uniformly wound toroid on a ceramic core. It has a negligible external magnetic field and
hence essentially no pickup from external fields.
The inductor is resiliently supported in a mixture of ground cork and silica gel, after which the whole assembly
is cast with a potting compound into a cubical aluminum case.
Sizes of 1 mH and above have three terminals,
two for inductor leads and the third connected to the case, to provide either a two- or three-terminal standard.
The 100 µH size has three additional terminals for the switching used to minimize connection errors.
Stability: Inductance change is less than ±0.01% per year.
Calibration: A certificate of calibration is provided with each unit, giving measured values of inductance
at 100, 200, 400, and 1000Hz, with temperature and method of measurements specified.
These values are obtained by comparison, to a precision, typically, of better than ±0.005%, with
working standards whose absolute values, determine and maintained in terms of reference standards
periodically certified by the National Institute of Standards and Technology, are known to an accuracy
typically ±(0.02%+0.1µH) at 100Hz, ±(0.1%+0.1µH) for the 1482-B
Temperature Coefficient of
Inductance: Approximately 30ppm/ºC. Minute temperature corrections may be computed from DC
resistance changes. A 1% increase in resistance, produced by temperature increase of 2.54°C
corresponds to 0.0076% increase in inductance.
Description | Nominal
Inductance |
Adjustment
Accuracy (Percent) |
*Resonant
Frequency (kHz) |
*DC
Resistance W |
*Q at
100Hz |
Milliamperes
rms for: |
|
---|---|---|---|---|---|---|---|
1482-B 1482-E 1482-H 1482-L 1482-P 1482-T |
100µH 1mH 10mH 100mH 1H 10H |
±0.25 ±0.1 ±0.1 ±0.1 ±0.1 ±0.1 |
900 500 220 70 15 5 |
0.083
0.84 8.2 81 616 6400 |
0.76
0.75 0.77 0.78 1.02 0.98 |
1550
490 156 50 18 5.6 |
6010
1890 600 192 70 22 |