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DEMAGNETIZATION:
Small pieces, which have become residually magnetized, may be easily
demagnetized by the following procedure: Energize the Probe and pass small parts through the
area between the leg
ends “feet” and withdraw to a distance of approximately two feet. On large
pieces, place the Probe in the same position as inspection, energize the Probe and lift from the
work surface to a distance of approximately two feet. This procedure may need to be performed
more than once to remove the residual field.
AC MAGNETIZATION:
An AC magnetic field induced into a part is a
“skin” or surface field and
does not penetrate the cross section of the material. A by-product of AC is in the form of eddy
currents. These eddy currents tend to guide or direct the magnetic field in a narrow pattern
between the poles. Another by-product is a vibratory action, which adds mobility to the inspection
particles to form a more highly defined powder build-up at the defect. For these reasons, an AC
magnetic field is the most desirable for the detection of surface breaking defects.
HALF WAVE RECTIFIED (DC) MAGNETIZATION:
A DC field induced into a small work piece penetrates a
larger cross section of the part and is inclined to spread out of each side of the line between the poles. The
field energy is dispersed over a greater area. Thus, DC provides greater penetration for the detection of
near-surface defects in small parts.
CAUTION:
Small parts may become magnetically saturated due to excessive field application. This
may cause a masking effect to the point where it is impossible to define a defect.
WARRANTY:
The Parker 400 series are warranted against malfunction due to defective material
and or workmanship. The defective unit will be repaired or replaced (less incoming freight charges)
for a period of one year from the date of sale. This repair warranty does not apply to altered units.
Repair or replacement of the defective unit will be made at the discretion of Parker Research
Corporation. Repaired or replacement unit(s) will be returned to the original customer prepaid.
The obligation of Parker Research Corporation is limited to the repair or replacement of the
defective unit. No other obligation is expressed or implied. Parker Research Corporation assumes
no liability from any claims arising from the use of this equipment.
CAUTION:
For the correct and safe use of this equipment, training of operating personnel is
required. Use of proper inspection procedures, standards compliance and safety requirements is
the obligation of the user.
ALWAYS WEAR SAFETY GLASSES WHEN USING THIS EQUIPMENT
PARKER RESEARCH CORP.
2642 ENTERPRISE ROAD WEST
CLEARWATER, FL 33763
