5
OPERATION
COIL MAGNETIZATION
1. Attach (2) 15' lengths of 4/O cable to the appropriate connectors of the front panel.
2. Wrap three turns of the 15 foot cable around or through the part to be inspected.
Connect in series with the two other cables to form a 30 foot closed circuit.
3. Plug remote control cable into "Control Cable" receptacle. Use switch to control
magnetizing current.
4. Turn current control to position that provides desired current level.
5. Apply magnetic inspection powder or bath to the surface to be inspected while current
is on. Inspect for lines of magnetic particle build-up indicating circular defects.
PROD MAGNETIZATION
1. Attach two 15' lengths of 4/O cables to appropriate connectors on front panel.
2. Plug prod control cable into "Control Cable Receptacle".
3. Turn current control to position that gives desired current level.
4. Make prod contacts with clean surface of part. Place prod tips approximately six inches
apart on either side of the line of suspected defect. Press prod handle switch to initiate
current flow. Use very firm contact pressure to minimize chances of arcing and burning.
Ammeter will indicate magnetizing current.
5. Apply magnetic powder to the surface while magnetizing current is on.
6. Release prod handle switch to stop current flow. Remove prods from parts.
DEMAGNETIZATION
1. Connect a formed coil to the AC and common output terminals. Set the current control
to desired current level. Depending upon the size, the part is either passed through the
coil, or the coil is passed completely over the part and slowly withdrawn while current is
on. As the part or coil is withdrawn, the diminishing intensity of the AC field completes the
demagnetization.
Содержание DA750
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