F.W. Bell 4080 Operating Instructions Manual

SPECIFICATIONS

Measurement
Range

0.1-511 mG (std.)

0.01-51.1 µ T(opt.)

Accuracy
Error
(typical)
>4 mG

<4 mG

± (2% of rdg. +

1 digit)
± (1 digit)

Directionality
Error

± 1%, typ.

± 3%, max.

Overall Error
>4 mG
<4 mG

± 5% of rdg., max.

± 2 digit, max.

Frequency
Response

25 Hz - 1 kHz

Calibration
Frequency

60 Hz

(50 Hz opt.)
Display 3 digit LCD
Measurement

Type

True RMS

Sampling
Interval

0.4 sec.

Battery Life 40 hours (typ.)
Power

Source

9V alkaline

battery

Operating
Temp

0° to + 50° C

Weight 5 oz.
Size 4.7”L x 2.4”W x

1.0”D

Warranty One Year

REFERENCES

1. Questions and Answers about
Electric and Magnetic Fields,
NIEHS/DOE, 1994. (800) 363-

2383. (Free)

2. Electric and Magnetic Fields
From 60 Hertz Electrical Power.
Department of Engineering and
Public Policy, Carnegie-Mellon
University, Pittsburgh, PA 15213,

1989. [phone]. ($3.50)

3. Microwave News, P.O. Box 1799,
Grand Central Station, New York,
NY 10163; published bi-monthly
[phone].

WARRANTY

Sypris Test & Measurement warrants this
product against defects in material and
workmanship for a period of one year from
the date of purchase. This warranty does not
cover damage due to accidents, misuse or
tampering, nor does it cover damage
resulting from non-authorized repair. If a
malfunction or failure occurs, send the unit
insured and properly packaged to the
address listed below. Sypris Test &
Measurement will, at its option, repair or
replace the unit and return it to the
purchaser, with charges only for shipping.
This warranty is limited to the original
purchaser and is not transferable.

THE ABOVE WARRANTY IS EXPRESSLY IN LIEU OF ALL
OTHER WARRANTIES EXPRESSED OR IMPLIED AND ALL
OTHER OBLIGATIONS AND LIABILITIES ON THE PART OF
SYPRIS TEST & MEASUREMENT AND NO PERSON
INCLUDING ANY DISTRIBUTOR, AGENT OR
REPRESENTATIVE OF SYPRIS TEST & MEASUREMENT IS
AUTHORIZED TO ASSUME FOR SYPRIS TEST &
MEASUREMENT ANY LIABILITY ON ITS BEHALF OR ITS
NAME, EXCEPT TO REFER THE PURCHASER TO THIS
WARRANTY. THE ABOVE EXPRESS WARRANTY IS THE
ONLY WARRANTY MADE BY SYPRIS TEST &
MEASUREMENT. SYPRIS TEST & MEASUREMENT DOES
NOT MAKE AND EXPRESSLY DISCLAIMS ANY OTHER
WARRANTIES, EITHER EXPRESSED OR IMPLIED,
INCLUDING WITHOUT LIMITING THE FOREGOING,

WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE OR ARISING BY STATUTE OR
OTHERWISE IN LAW OR FROM A COURSE OF DEALING
OR USAGE OF TRADE THE EXPRESS WARRANTY
STATED ABOVE IS MADE IN LIEU OF ALL LIABILITIES
FOR DAMAGES, INCLUDING BUT NOT LIMITED TO
CONSEQUENTIAL DAMAGES, LOST PROFITS OR THE
LIKE ARISING OUT OF OR IN CONNECTION WITH THE
SALE, DELIVERY, USE OR PERFORMANCE OF THE
GOODS. IN NO EVENT WILL SYPRIS TEST &
MEASUREMENT BE LIABLE FOR SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES EVEN IF SYPRIS TEST &
MEASUREMENT HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

This warranty gives you specific legal rights,
and you may also have other rights that vary
from state to state.

Answers to any questions concerning the
use of and authorized repair of this product
may be obtained by writing:

6120 Hanging Moss Road

Orlando, Florida 32807

[phone] Phone

[phone] Fax

www.sypris.com

Manual UN-01-226
Rev. D
Item No. 359193

Assembled in Mexico Printed in Mexico

ELF Meter

Model 4080

Operating Instructions

GENERAL INFORMATION

The Model 4080 is the first economical,
handheld, triaxial magnetic field meter
available for the measurement of Extremely
Low Frequency (ELF) magnetic fields. The
Model 4080 allows the user to make quick,
accurate spot field measurements from a
variety of ELF sources, including AC power
lines, office equipment, video display
terminals (VDTs), household appliances, and
all types of electrical and electronic
equipment.

The Model 4080 measures a wide range of
ELF magnetic fields, independent of
measurement angle. The instrument uses
three internal sensors and a microprocessor
to accurately compute and display the vector
magnitude of the magnetic field in milligauss
(or microtesla). The autoranging feature
adjusts the instrument to the proper scale,
yielding a wide measurement range of 0.1 to
511 mG (0.01 to 51.1 µT). The typical
accuracy error is less than 2%, sufficient for
characterizing all electrical and electronic
equipment.

The instrument comes complete with a
padded, durable carrying case, and a full
one-year warranty, covering both parts and
labor.

Note: The term “magnetic field” is used
loosely throughout the manual. All
references to magnetic field levels in this
manual actually refer to the “magnetic flux
density”, which is measured in (CGS) units of
milligauss (mG) or (SI) units of microtesla
(µT).
Possible health effects associated with the
exposure to ELF magnetic fields have been
reported in scientific literature. Although
evidence of direct cause and effect between
ELF magnetic fields and health
problems has not been established,
many respected authorities recommend
“prudent avoidance” of ELF magnetic fields

until further research leads to more
conclusive results.

For more information on the subject of ELF
magnetic fields, see the references listed at
the end of this manual.

OPERATING INSTRUCTIONS

Turning the Instrument On: To operate the

Model 4080, first flip the ON/OFF switch to
the UP (ON) position. The instrument will
perform a self test and display “-8.8.8” for
approximately one second, verifying proper
operation.

Operation: After the power-on sequence
has finished, the display will indicate the
magnetic field reading, in mG (instruments
ordered with Option T display the magnetic
field level in µT). Simply bring the instrument
into the vicinity of ELF magnetic fields and
note the magnetic field level. As a result of
its inherent 3-axis method of measurement,
the Model 4080 eliminates the measurement
error due to improper instrument orientation.
Unlike single-axis meters, no special
handling or orientation is necessary to obtain
an accurate reading.

Battery Replacement: Under normal
operating conditions, the unit will provide
approximately 40 hours of continuous use
using a standard 9V alkaline battery. When
the battery level falls below 5.4V, a low
battery indication (signaled by a minus sign)
will appear. Approximately one additional
hour of measurement time is available before
accuracy will become degraded. When
replacing, use only an alkaline battery.

! Make sure the ON/OFF switch is in

the “OFF” position before replacing
the battery.

Dead Battery: If, after turning the instrument
on, either nothing happens or the unit
behaves in an unpredictable fashion, try
replacing the battery. If this solves the
problem, it may be that the instrument was
left on accidentally for an extended period of
time, resulting in a “dead” battery.

TECHNICAL DESCRIPTION

This section describes some of the technical
properties of the Model 4080. The
information below explains how the Model
4080 measures magnetic fields.

Magnetic fields are created by electrical
current. They have two basic properties:
their strength (or level) measured in mG or
µT, and their direction. Magnetic fields form
closed, continuous loops around currents,
and are therefore, 3-dimensional in nature.

There are three orthogonal magnetic field
sensors (one for each dimension) located
internal to the Model 4080 just below the
F.W. Bell logo. If the three components of
the magnetic field are labeled Bx, By, and
Bz, then the resultant field is calculated by
the microprocessor as:

The display will indicate the magnetic field
level, B. Rotating the instrument will not
result in a changing field indication, as long
as the magnetic field is constant across the
dimensions of the internal sensors. Some
degree of directionality will be observed in
near fields (i.e., where the magnetic field
level changes rapidly over distances
comparable to the dimensions of the
instrument). In far fields, where the magnetic
field is essentially constant, directionality of
the instrument is typically less than ±2%.

Calibration: The Model 4080 has been
calibrated in accordance with Sypris Test &
Measurement Quality Assurance manual and
is traceable to the National Institute of
Standards and Technology (NIST). The
Sypris Test & Measurement quality system is
registered to ISO 9001:2000 and the
calibration was performed in compliance with
MIL-STD-45662A. For maximum continued
accuracy the 4080 should be calibrated
annually.