F.W. Bell 5060 User manual

Model 5060
GAUSS / TESLA METER
Instruction Manual
Manual UN-01-229
Rev. E, ECO 13097
Item No. 359924
Sypris Test & Measurement
All rights reserved.

This symbol appears on the instrument and probe.
It refers the operator to additional information
contained in this instruction manual, also identified
by the same symbol.
NOTICE:
See Pages 3-1 and 3-2
for SAFETY
instructions prior to first use !

i
Table of Contents
SECTION-1 INTRODUCTION
Understanding Flux Density.............................................. 1-1
Measurement of Flux Density............................................ 1-2
Product Description........................................................... 1-5
Applications....................................................................... 1-6
SECTION-2 SPECIFICATIONS
Instrument......................................................................... 2-1
Standard Transverse Probe.............................................. 2-3
Standard Axial Probe........................................................ 2-4
Optional Probe Extension Cable....................................... 2-5
Zero Flux Chamber............................................................ 2-6
SECTION-3 OPERATING INSTRUCTIONS
Operator Safety................................................................. 3-1
Operating Features........................................................... 3-3
Instrument Preparation...................................................... 3-5
Power-Up.......................................................................... 3-7
Power-Up Settings............................................................ 3-8
Low Battery Condition....................................................... 3-9
Overrange Condition......................................................... 3-10
UNITS of Measure Selection............................................. 3-11
RANGE Selection.............................................................. 3-12
ZERO Function.................................................................. 3-13
Automatic ZERO Function................................................. 3-14
Manual ZERO Function..................................................... 3-16
Sources of Measurement Errors........................................ 3-18
WARRANTY.................................................................... 4-1

ii
List of Illustrations
Figure 1-1 Flux Lines of a Permanent Magnet............ 1-1
Figure 1-2 Hall Generator............................................ 1-2
Figure 1-3 Hall Probe Configurations.......................... 1-4
Figure 2-1 Standard Transverse Probe....................... 2-3
Figure 2-2 Standard Axial Probe................................. 2-4
Figure 2-3 Optional Probe Extension Cable................ 2-5
Figure 2-4 Zero Flux Chamber.................................... 2-6
Figure 3-1 Auxiliary Power Connector Warnings......... 3-1
Figure 3-2 Probe Electrical Warning........................... 3-2
Figure 3-3 Operating Features.................................... 3-3
Figure 3-4 Battery Installation..................................... 3-5
Figure 3-5 Probe Connection...................................... 3-6
Figure 3-6 Power-Up Display...................................... 3-7
Figure 3-7 Missing Probe Indication............................ 3-8
Figure 3-8 Low Battery Indication................................ 3-9
Figure 3-9 Overrange Indication ................................ 3-10
Figure 3-10 UNITS Function.......................................... 3-11
Figure 3-11 RANGE Function....................................... 3-12
Figure 3-12 Automatic ZERO Function......................... 3-15
Figure 3-13 Manual ZERO Function.............................. 3-17
Figure 3-14 Probe Output versus Flux Angle................ 3-19
Figure 3-15 Probe Output versus Distance................... 3-19
Figure 3-16 Flux Density Variations in a Magnet........... 3-20

1-1
Section 1
Introduction
UNDERSTANDING FLUX DENSITY
Magnetic fields surrounding permanent magnets or electrical
conductors can be visualized as a collection of magnetic flux lines;
lines of force existing in the material that is being subjected to a
magnetizing influence. Unlike light, which travels away from its
source indefinitely, magnetic flux lines must eventually return to
the source. Thus all magnetic sources are said to have two poles.
Flux lines are said to emanate from the “north” pole and return to
the “south” pole, as depicted in Figure 1-1.
Figure 1-1
Flux Lines of a Permanent Magnet
One line of flux in the CGS measurement system is called a
maxwell (M), but the weber (W), which is 108 lines, is more
commonly used.
Flux density, also called magnetic induction, is the number of flux
lines passing through a given area. It is commonly assigned the
symbol “B” in scientific documents. In the CGS system a gauss
(G) is one line of flux passing through a 1 cm2area. The more

INTRODUCTION
1-2
commonly used term is the tesla (T), which is 10,000 lines per cm2
. Thus
1 tesla = 10,000 gauss
1 gauss = 0.0001 tesla
Magnetic field strength is a measure of force produced by an
electric current or a permanent magnet. It is the ability to induce a
magnetic field “B”. It is commonly assigned the symbol “H” in
scientific documents. It is important to know that magnetic field
strength and magnetic flux density are not the same. Magnetic
field strength deals with the physical characteristics of magnetic
materials whereas flux density does not.
MEASUREMENT OF FLUX DENSITY
A device commonly used to measure flux density is the Hall
generator. A Hall generator is a thin slice of a semiconductor
material to which four leads are attached at the midpoint of each
edge, as shown in Figure 1-2.
Figure 1-2
Hall Generator

INTRODUCTION
1-3
A constant current (Ic) is forced through the material. In a zero
magnetic field there is no voltage difference between the other
two edges. When flux lines pass through the material the path of
the current bends closer to one edge, creating a voltage difference
known as the Hall voltage (Vh). In an ideal Hall generator there is
a linear relationship between the number of flux lines passing
through the material (flux density) and the Hall voltage.
The Hall voltage is also a function of the direction in which the flux
lines pass through the material, producing a positive voltage in
one direction and a negative voltage in the other. If the same
number of flux lines pass through the material in either direction,
the net result is zero volts.
The Hall voltage is also a function of the angle at which the flux
lines pass through the material. The greatest Hall voltage occurs
when the flux lines pass perpendicularly through the material.
Otherwise the output is related to the cosine of the difference
between 90°and the actual angle.
The sensitive area of the Hall generator is generally defined as the
largest circular area within the actual slice of the material. This
active area can range in size from 0.2 mm (0.008”) to 19 mm
(0.75”) in diameter. Often the Hall generator assembly is too
fragile to use by itself so it is often mounted in a protective tube
and terminated with a flexible cable and a connector. This
assembly, known as a Hall probe, is generally provided in two
configurations:

INTRODUCTION
1-4
Figure 1-3
Hall Probe Configurations
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 axis of sensitivity is the primary difference,
as shown by “B” in Figure 1-3. 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, solenoid or traveling wave tube.
Either probe can be used where there are few physical space
limitations, such as in geomagnetic or electromagnetic
interference surveys.
Handle the Hall probe with care. Do not bend the stem or
apply pressure to the probe tip as damage may result. Use
the protective cover when the probe is not in use.

INTRODUCTION
1-5
PRODUCT DESCRIPTION
The MODEL 5060 GAUSS / TESLAMETER is a portable
instrument that utilizes a Hall probe to measure static (dc)
magnetic flux density in terms of gauss or tesla. The
measurement range is from 0.1 mT (1 G) to 1.999T (19.99 kG).
The MODEL 5060 consists of a palm-sized meter and various
detachable Hall probes. The meter operates on standard 9 volt
alkaline batteries or can be operated with an external ac-to-dc
power supply. A retractable bail allows the meter to stand upright
on a flat surface. A notch in the bail allows the meter to be wall
mounted when bench space is at a premium. The large display is
visible at considerable distances. The instrument is easily
configured using a single rotary selector and two pushbuttons.
Two measurement ranges can be selected. A “zero” function
allows the user to remove undesirable readings from nearby
magnetic fields (including earth’s) or false readings caused by
initial electrical offsets in the probe and meter. Included is a “zero
flux chamber” which allows the probe to be shielded from external
magnetic fields during this operation. The “zero” adjustment can
be made manually or automatically.
The meter, probes and accessories are protected when not in use
by a sturdy carrying case.

INTRODUCTION
1-6
APPLICATIONS
•Sorting or performing incoming inspection on permanent
magnets, particularly multi-pole magnets.
•Testing audio speaker magnet assemblies, electric motor
armatures and stators, transformer lamination stacks,
cut toroidal cores, coils and solenoids.
•Determining the location of stray fields around medical
diagnostic equipment.
•Determining sources of electromagnetic interference.
•Locating flaws in welded joints.
•Inspection of ferrous materials.
•3-dimensional field mapping.
•Inspection of magnetic recording heads.

2-1
Section 2
Specifications
INSTRUMENT
RANGE RESOLUTION
GAUSS TESLA GAUSS TESLA
2 kG 200 mT 1 G 0.1 mT
20 kG 2 T 10 G 1 mT
ACCURACY (including probe): ±4 % of reading, ±3
counts
ACCURACY CHANGE WITH
TEMPERATURE
(not including probe): ±0.02 % / ºC typical
WARMUP TIME TO RATED
ACCURACY: 15 minutes
OPERATING TEMPERATURE: 0 to +50ºC (+32 to +122ºF)
STORAGE TEMPERATURE: -25 to +70ºC (-13 to +158ºF)
BATTERY TYPE: 9 Vdc alkaline (NEDA 1640A)
BATTERY LIFE: 8 hours typical (two batteries)
AUXILIARY POWER: 9 Vdc, 300 mA
AUXILIARY POWER CONNECTOR: Standard 2.5 mm I.D. / 5.5 mm
O.D. connector. Center post is
positive (+) polarity.

SPECIFICATIONS
2-2
METER DIMENSIONS:
Length: 13.2 cm (5.2 in)
Width: 13.5 cm (5.3 in)
Height: 3.8 cm (1.5 in)
WEIGHT:
Meter w/batteries: 400 g (14 oz.)
Shipping: 1.59 kg (3 lb., 8 oz.)
REGULATORY INFORMATION:
Compliance was demonstrated to the following specifications as
listed in the official Journal of the European Communities:
EN 50082-1:1992 Generic Immunity
IEC 801-2:1991 Electrostatic Discharge
Second Edition Immunity
IEC 1000-4-2:1995
ENV 50140:1993 Radiated Electromagnetic
IEC 1000-4-3:1995 Field Immunity
EN 50081-1:1992 Generic Emissions
EN 55011:1991 Radiated and Conducted
Emissions

SPECIFICATIONS
2-3
STANDARD TRANSVERSE PROBE
MODEL NUMBER: HTV56-0602
FLUX DENSITY RANGE: 0 to ±2 T (0 to ±20 kG)
FREQUENCY BANDWIDTH: dc only
OFFSET CHANGE WITH
TEMPERATURE: ±30 µT (300 mG) / ºC typical
ACCURACY CHANGE WITH
TEMPERATURE: - 0.05% / ºC typical
OPERATING TEMPERATURE RANGE: 0 to +75 ºC (+32 to +167ºF)
STORAGE TEMPERATURE RANGE: -25 to +75 ºC (-13 to +167ºF)
Figure 2-1
Standard Transverse Probe

SPECIFICATIONS
2-4
STANDARD AXIAL PROBE
MODEL NUMBER: SAV56-1904
FLUX DENSITY RANGE: 0 to ±2 T (0 to ±20 kG)
OFFSET CHANGE WITH
TEMPERATURE: ±30 µT (300 mG) / ºC typical
ACCURACY CHANGE WITH
TEMPERATURE: - 0.05% / ºC typical
FREQUENCY BANDWIDTH: dc only
OPERATING TEMPERATURE RANGE: 0 to +75 ºC (+32 to +167ºF)
STORAGE TEMPERATURE RANGE: -25 to +75 ºC (-13 to +167ºF)
Figure 2-2
Standard Axial Probe

SPECIFICATIONS
2-5
OPTIONAL PROBE EXTENSION CABLE
MODEL NUMBER: X5000-0006
OPERATING TEMPERATURE RANGE: 0 to +75 ºC (+32 to +167ºF)
STORAGE TEMPERATURE RANGE: -25 to +75 ºC (-13 to +167ºF)
Figure 2-3
Optional Probe Extension Cable

SPECIFICATIONS
2-6
ZERO FLUX CHAMBER
MODEL NUMBER: YA-111
CAVITY DIMENSIONS:
Length: 50.8 mm (2”)
Diameter: 8.7 mm (0.343”)
ATTENUATION: 80 dB to 30 mT (300 G)
PURPOSE: To shield the probe from
external magnetic fields during
the ZERO operation.
Figure 2-4
Zero Flux Chamber

3-1
Section 3
Operating Instructions
OPERATOR SAFETY
Do not connect the auxiliary power connector to an ac power
source. Do not exceed 15 Vdc regulated or 9 Vdc
unregulated. Do not reverse polarity. Use only a regulated
ac-to-dc power supply certified for country of use.
Figure 3-1
Auxiliary Power Connector Warnings

OPERATING INSTRUCTIONS
3-2
Do not allow the probe to come in contact with any voltage
source greater than 30 Vrms or 60 Vdc.
Figure 3-2
Probe Electrical Warning
Batteries contain ferrous materials that are attracted to
magnetic fields. Be careful when operating the instrument
near large magnetic fields, as it may move without warning.
Extension cables are available to increase the probe cable
length, so that the instrument can remain in a safe position
with respect to the field being measured with the probe.

OPERATING INSTRUCTIONS
3-3
OPERATING FEATURES
Figure 3-3
Operating Features
1 Display. Liquid crystal display (LCD).
2 Manual ZERO Control. In the ZERO mode of operation
the user can manually adjust the zero point using this
control.
3 Function Selector. This control allows the operator to
change the meter’s range and units of measure. It also
engages the ZERO and MEASURE modes of operation.
4 Battery Compartment Cover. This cover slides open to
allow one or two 9 volt batteries to be installed.
5 Power Switch. Push-on / push-off type switch to apply
power to the meter.
6 SELECT Switch. Momentary pushbutton used in
conjunction with the Function Selector 3 to configure
the meter’s range and units of measure.