Sypris 5080 User manual

NOTES:
1. The first and last sheets of this manual are the front and back
covers.
2. Front and back covers to be 10 point weight, coated one side
(lettering side)(10. C1S), all other sheets to be 20 lb bond.
3. All lettering and graphics to be black, except as follows: The
Sypris logos on front and back covers to be red PMS 200,
except for the word “SYPRIS” which is to be blue PMS 286.
The F.W. Bell logos on the front and back covers to be blue
PMS 286, except for “F.W. BELL” which is to be black.
4. Marking Criteria:
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a character are missing or broken.
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C. Ink spots forming images are uniform: No thin spots or
excessive buildups are present.
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6, 8 etc.
E. Ink is confined to the lines of the characters: No smeared
characters or double images are present.
5. Manuals to be true copies of artwork or electronic file supplied
by Sypris Test & Measurement.
6. First article sample required with any new order.
UN-01-231 Rev. F ECO 13095

Model 5080
GAUSS / TESLA METER
Instruction Manual

THIS SIDE BLANK !
(Inside of front cover)

Model 5080
GAUSS / TESLA METER
Instruction Manual
Manual UN-01-231
Rev. F, ECO 13095
Item No. 359926
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.............................................. 2-5
Standard Axial Probe........................................................ 2-6
Optional Probe Extension Cable....................................... 2-7
Zero Flux Chamber............................................................ 2-8
SECTION-3 OPERATING INSTRUCTIONS
Operator Safety................................................................. 3-1
Operating Features........................................................... 3-3
Instrument Preparation...................................................... 3-6
Power-Up.......................................................................... 3-8
Power-Up Settings............................................................ 3-9
Low Battery Condition....................................................... 3-10
Overrange Condition......................................................... 3-11
AC or DC Measurement Selection..................................... 3-12
UNITS of Measurement Selection..................................... 3-13
RANGE Selection.............................................................. 3-14
HOLD Mode Selection....................................................... 3-16
MIN / MAX Hold Usage...................................................... 3-17
Peak Hold Usage.............................................................. 3-18
ZERO Function.................................................................. 3-20
Automatic ZERO Function................................................. 3-21
Manual ZERO Function..................................................... 3-23
RELATIVE Mode............................................................... 3-25
Automatic RELATIVE Mode.............................................. 3-28
Manual RELATIVE Mode................................................... 3-30

ii
ANALOG OUTPUT Function............................................. 3-31
Analog Output Usage........................................................ 3-33
Sources of Measurement Errors........................................ 3-35
More details on AC Mode Operation................................. 3-38
More details on DC Mode Operation................................. 3-40
SECTION-4 REMOTE OPERATION
RS-232 Interface Parameters............................................ 4-1
RS-232 Interface Connection............................................ 4-1
Remote Command Standards........................................... 4-3
Command Format.............................................................. 4-4
Message Terminators........................................................ 4-4
Error Buffer........................................................................ 4-5
Status Registers................................................................ 4-5
Status Byte and Request For Service (RQS).................... 4-6
Standard Event Register................................................... 4-9
Measurement Event Register............................................ 4-10
Operation Event Register.................................................. 4-10
Questionable Event Register............................................. 4-11
“Common” Command Syntax............................................ 4-11
“Common” Commands………........................................... 4-13
SCPI Command Syntax..................................................... 4-16
SCPI Commands............................................................... 4-18
Error Messages and Commands....................................... 4-21
Status Commands............................................................. 4-23
MODE Commands............................................................ 4-25
RANGE Commands.......................................................... 4-26
HOLD Commands............................................................. 4-27
ZERO Command............................................................... 4-28
RELATIVE Commands...................................................... 4-28
MEASUREMENT Command............................................. 4-29
ANALOG OUTPUT Command.......................................... 4-30
Intermixing Common and SCPI commands....................... 4-31
Using Query Commands................................................... 4-31
Using the Operation Complete Status............................... 4-32
Example Program.............................................................. 4-33

iii
WARRANTY.................................................................... 5-1
List of Tables
Table 4-1 Common Command Summary.................. 4-13
Table 4-2 SCPI Command Summary........................ 4-18
List of Illustrations
Figure 1-1 Flux Lines of a Permanent Magnet............ 1-1
Figure 1-2 Hall Generator............................................ 1-3
Figure 1-3 Hall Probe Configurations.......................... 1-4
Figure 2-1 Standard Transverse Probe....................... 2-5
Figure 2-2 Standard Axial Probe................................. 2-6
Figure 2-3 Optional Probe Extension Cable................ 2-7
Figure 2-4 Zero Flux Chamber.................................... 2-8
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..................................... 3-6
Figure 3-5 Probe Connection...................................... 3-7
Figure 3-6 Power-Up Display...................................... 3-8
Figure 3-7 Missing Probe Indication............................ 3-9
Figure 3-8 Low Battery Indication................................ 3-11
Figure 3-9 Overrange Indication ................................ 3-11
Figure 3-10 MODE (AC-DC) Function........................... 3-12
Figure 3-11 UNITS Function.......................................... 3-13
Figure 3-12 RANGE Function....................................... 3-15
Figure 3-13 HOLD Function.......................................... 3-17
Figure 3-14 Automatic ZERO Function......................... 3-22
Figure 3-15 Manual ZERO Function.............................. 3-24

iv
Figure 3-16 RELATIVE Function................................... 3-28
Figure 3-17 Automatic RELATIVE Function................ 3-29
Figure 3-18 Manual RELATIVE Function...................... 3-31
Figure 3-19 OUTPUT Function...................................... 3-32
Figure 3-20 LO and HI Analog Output Displays............ 3-34
Figure 3-21 Adjusting the DC Offset of the Analog
Output........................................................ 3- 35
Figure 3-22 Probe Output versus Flux Angle................ 3-36
Figure 3-23 Probe Output versus Distance................... 3-37
Figure 3-24 Flux Density Variations in a Magnet........... 3-37
Figure 3-25 Low AC Signal Indication........................... 3-39
Figure 4-1 9-Pin Interface Connector.......................... 4-2
Figure 4-2 Serial Port Connection Schemes............... 4-3
Figure 4-3 Condition, Event and Enable registers....... 4-6
Figure 4-4 Status Byte and Enable registers............... 4-7
Figure 4-5 Standard Event register............................. 4-9
Figure 4-6 Measurement Event register...................... 4-10
Figure 4-7 Operation Event register............................ 4-10
Figure 4-8 Questionable Event register....................... 4-11

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
commonly used term is the tesla (T), which is 10,000 lines per cm2
. Thus

INTRODUCTION
1-2
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. The unit of “H” in the CGS system is an
oersted (Oe), but the ampere-meter (Am) is more commonly used.
The relationship is
1 oersted = 79.6 ampere-meter
1 ampere-meter = 0.01256 oersted
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. The only time the two are considered equal is in
free space (air). Only in free space is the following relationship
true:
1 G = 1 Oe = 0.0001 T = 79.6 Am
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.

INTRODUCTION
1-3
Figure 1-2
Hall Generator
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. This sensitivity to flux direction makes
it possible to measure both static (dc) and alternating (ac)
magnetic fields.
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

INTRODUCTION
1-4
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:
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.

INTRODUCTION
1-5
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.
PRODUCT DESCRIPTION
The MODEL 5080 GAUSS / TESLAMETER is a portable
instrument that utilizes a Hall probe to measure magnetic flux
density in terms of gauss, tesla or ampere-meter. The
measurement range is from 0.01 mT (0.1 G or 0.01 kAm) to
2.999T (29.99 kG or 2387 kAm). The instrument is capable of
measuring static (dc) magnetic fields and alternating (ac) fields.
The MODEL 5080 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.
Three measurement ranges can be selected or the meter can
automatically select the best range based on the present flux
density being measured. 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. Another feature called “relative mode”
allows large flux readings to be suppressed so that small
variations within the larger field can be observed directly. Both the
“zero” and “relative” adjustments can be made manually or
automatically.

INTRODUCTION
1-6
Other features include three “hold” modes, allowing either the
arithmetic maximum, minimum or true peak values to be held
indefinitely until reset by the user. An analog signal is available
from a standard BNC connector that is representative of the
magnetic flux density signal and is calibrated to ±3 volts full scale
in dc mode or 3 Vrms in ac mode. This output can be connected
to a voltmeter, oscilloscope, recorder or external analog-to-digital
converter.
The meter can be fully configured and flux density readings
acquired from a remote computer or PLC using the RS-232
communications port. This is a standard 9-pin “D” connector
commonly used in personal computers. The commands follow
widely accepted protocols established by the IEEE-488.2 and
SCPI-1991 standards.
The meter, probes and accessories are protected when not in use
by a sturdy carrying case.
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 Am GAUSS TESLA Am
300 G 30 mT 23 kAm 0.1 G 0.01 mT 0.01 kAm
3 kG 300 mT 238 kAm 1 G 0.1 mT 0.1 kAm
30 kG 3 T 2388 kAm 10 G 1 mT 1 kAm
ACCURACY (reading on display and from RS-232 port,
including probe)
dc mode: ±1 % of reading, ±3 counts
ac mode:
20 - 10,000 Hz: ±2.5 % of reading, ±5 counts
10,000 - 20,000 Hz: ±5 % of reading, ±5 counts
ACCURACY (analog output, including probe)
dc mode: ±1 % of reading, ±5 mV.
ac mode, low range:
20 - 2000 Hz: ±3 % of reading, ±5 mV
7,000 Hz: - 3 dB (typical)
ac mode, mid and high range:
20 - 3500 Hz: ±3 % of reading, ±5 mV
13,000 Hz: - 3 dB (typical)
WARMUP TIME TO RATED
ACCURACY: 15 minutes

SPECIFICATIONS
2-2
MIN / MAX HOLD ACQUISITION TIME:
dc mode: 180 ms typical
ac mode: 300 ms typical
PEAK HOLD ACQUISITION TIME:
dc mode: 1 ms typical
ac mode: 1 ms typical
ANALOG OUTPUT SCALING:
dc mode: ±3 Vdc
ac mode: 3 Vrms
ANALOG OUTPUT NOISE: 4 mV rms typical
ANALOG OUTPUT LOAD: 10 kΩmin, 100 pF max.
ACCURACY CHANGE WITH
TEMPERATURE
(not including probe): ±0.02 % / ºC typical
BATTERY TYPE: 9 Vdc alkaline (NEDA 1640A)
BATTERY LIFE: 8 hours typical (two batteries,
analog output and RS-232 port
not used)
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.
ANALOG OUTPUT CONNECTOR: BNC
OPERATING TEMPERATURE: 0 to +50ºC (+32 to +122ºF)
STORAGE TEMPERATURE: -25 to +70ºC (-13 to +158ºF)

SPECIFICATIONS
2-3
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
2-4
COMMUNICATIONS PORT:
Format: RS-232C
Lines supported: Transmit, receive, common.
Connector type: 9-pin “D” female
Cable length: 3 m (9.8 ft.) maximum
Receive input resistance: 3 kΩminimum
Receive voltage limit: ±30 V maximum
Transmit output voltage:±5 V min, ±8 V typical
Baud rate: 2400
Stop bits: 1
Character length: 8
Parity: None
Standards supported: IEEE-1987.2, SCPI-1991
EMC APPLICATION NOTE
Use only high quality, double shielded cables for RS-232
connection. Keep the length of the cables less than
3 meters (9.8 ft.). Long cables (>3m) with insufficient EMI
shielding can cause excessive emissions or may be
susceptible to external interference.