F.W. Bell 8000 series, Инструкция по эксплуатации

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F.W. BELL 8000 Series Gauss/Tesla Meter Instruction Manual
Section 3 - Probes 3-1
SECTION 3 Probes
Overview
F.W. Bell’s 8000 series gauss/tesla meter probes are designed to meet
the electrical and mechanical requirements of virtually any application.
Models are available for transverse, axial, and very low field
measurements. The probe style is dependent upon the measurement
environment. The standard polypropylene or fiberglass stem is generally
adequate for laboratory or light handling environments, while the heavy
duty aluminum stem is recommended for harsher environments. The
probe’s length, outside diameter (axial probes) or thickness and width
(transverse probes) are important if there are physical constraints where
the probe will be used.
In “transverse” probes the Hall generator is mounted in a thin, flat stem
whereas in “axial” probes the Hall generator is mounted in a cylindrical
stem. The primary difference is the axis of measurement, as shown by
“+B” in
Figure 3-2
. Generally transverse probes are used to make
measurements between two magnetic poles such as those in audio
speakers, electric motors and imaging machines. Axial probes are often
used to measure the magnetic field along the axis of a coil or solenoid.
Either probe can be used where there are few physical space limitations,
such as in geomagnetic or electromagnetic interference surveys.
The low field probes are designed for high sensitivity, volumetric
measurement such as mapping variations in the earth’s magnetic field or
detecting the presence of ferrous objects.
Each probe is physically identified with model number, serial number and
a maximum voltage rating of “30VRMS / 60Vdc MAX” on a durable
polyester label wrapped around the cable jacket.
Handle Hall probes with care. Do not bend the stem or apply
pressure to the probe tip or drop the probe as damage may result.
Probe Extension Cables
are available in several lengths as
Model XOVNK-xx, where xx is 05, 10, 15 or 20 feet. The 20 foot model
may present problems reading the probe memory in locations with higher
levels of electrical noise. The probe must be connected to the extension
before connecting extension to the gaussmeter.