Standard one meter loop configurations as well as large custom loops up to 3 meters by 4 meters are now available for IEC-1000-4-8 testing along with 125 ampere and 1000 ampere generators. For large systems that cannot be elevated above the ground plane, the new proximity array allows you to test IEC 1000-4-8.
IEC 1000-4-8 Magnetic Field Immunity Systems
Magnetic fields generated at AC power mains frequently degrade residential, commercial, industrial and medical electronic equipment. These 50Hz and 60Hz magnetic fields produced in the vicinity of power transformers can cause problems for CRT's, Hall effect sensors and other electronic products. Electronics products can be tested for immunity to power frequency magnetic fields using Fischer Custom Communication, Inc. family of IEC 1000-4-8 magnetic field immunity test systems.
Loops from 1 meter by 1 meter up to 3 meters by 4 meters are available along with a proximity array. Generators are available for 50Hz and 60Hz operation that can provide magnetic fields from 1 ampere/meter up to 1000 amperes/meter. Custom generators are available upon request.
Specifications:
Test dimensions: 0.1 meter
Frequency: 50 or 60 Hz -- selectable
Magnetic Field: 0.5 to 30 ampers/meter
Digital readout of magnetic field
Battery operated
IEC 1000-4-6 IEC 1000-4-8 IEC 1000-4-9 IEC 1000-4-10
Conducted disturbances
induced by RF fields 		Power frequency
magnetic fields		 Pulse magnetic
fields 		Damped oscillatory
magnetic field
Proximity Test for IEC 1000-4-8

Magnetic fields generated at AC power mains frequently degrade residential, commercial, industrial and medial electronic equipment These 50 and 60 Hz magnetic fields produced in the vicinity of power transformers can cause problems for CRT's, Hall effect sensors and other electronic products. Electronics products can be tested for immunity to power frequency magnetic fields using Fisher custom Communications, Inc. hand held proximity loop.
The test can be used in the design phase or to insure the equipments reliable operation after it has been placed in service. The hand help proximity loop allow power frequency magnetic fields to be coupled to the EUT. Then hand held loop can be easily moved around the EUT to identify sensitive areas in horizontal an vertical polarizations. The figure below shows an example of how the test is performed.
Helmholtz Coil
HelmholtzCoil systems are available with diameters up to 2 meters
Test Set-Up
EM II
The EM II is a versatile Isotropic Magnetic Field Survey/Data Recording Meter. Ideal for field versus time (broadband harmonics) or field versus distance (mapping) applications. The optional attachments expand the meter's capabilities. The collected information can be retrieved, analyzed, plotted, and stored with software.
FEATURE STANDARD
Recording YES
Data Collected Actual measurements
Range 0.1 - 3,000 mG (0,01 mT - 300 mT)
Resolution 0.1 mG (0.01 mT)
Typical Accuracy ±2%
Frequency Broadband 40 - 800 Hz
Frequency Harmonic 100 - 800 Hz
Max. Sample 1.5 seconds
Internal Memory 156 or 512 KB
Display (mG/mT units) Alphanumeric - 8 characters
Measurement Method True RMS
Typical Battery Life: Alkaline Up to 7 days
Typical Battery Life: Lithium Up to 21 days
Lnda Wheel or Amp-Logger Use YES
Dimensions 6.6"x 2.6"x 1.5" (16.8cm x 6.6cm x 3.8cm)
Weight 12 ounces (341 grams)
Data Output Port RS-232
Options Optical link (data output port to computer communication port)
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20603 Earl Street • Torrance, CA 90503 • Tel: (310) 303-3300 • Fax: (310) 371-6268
E-mail: sales@fischercc.com