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Lake Shore Model 480 Fluxmeter User’s Manual
Accessories, Coils, and Probes 7-3
7.2 FIELD MEASURING PROBES
Lake Shore offers two standard field measuring probes. Check Lake Shore brochures or our website for
recent additions to this line.
Probes are accurately calibrated using field standards maintained at Lake Shore. Most standards are
traceable to physical standards such as carefully controlled dimensions, or sometimes, proton
resonance. Probes are calibrated for use in flux or flux density units. Pertinent calibration information
including number of turns, effective area, and resistance are stored in a PROM located in the probe
connector. Users need only attach the probe to the fluxmeter, turn on the instrument, set the range, and
re-set the zero before taking readings. No manual input of coil parameters is necessary.
7.2.1 100 cm 2 Field Probe
For years, the most common field probe had 100 cm 2 area-turns. Specifications are defined as
follows. See Figure 7-1.
Area-Turns
(approx.)
100 cm 2
Coil Resistance
(approx.)
6.5

Average Coil Diameter 1.04 cm
Frequency Range 10 kHz
Operating Temp. Range
10 to 40

C
Input Resistance
10 k

100 k

DC Ranges
30 mVs (3 tesla)
3 mVs (300 mT)
300 mVs (30
tesla)
30 mVs (3 tesla)
F-480-7-1.eps
Figure 7-1. 100 cm
2
Field Probe