Ramsey Oretronic IV Tramp Metal Detector REC 4479C
Page 45
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Covers over the electronics and rotating parts must always remain in place during normal
operation. Remove only for maintenance, with the
machine’s power OFF. Replace all covers
before resuming operation.
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During maintenance, a safety tag (not supplied by the factory) must be displayed in the ON/OFF
switch areas instructing others not to operate the unit (ANSI:B157.1).
False Tripping
False tripping means that something other than the metal the TMD IV is set up to detect is causing it to trip.
The most common problem is a sensitivity setting that is too high for the amount of background noise present.
This makes it difficult for the TMD IV to distinguish between the signal produced by tramp metal and the
background signal. Another common problem is coil imbalance, which can cause the receiver coil to generate
output signals when there is no tramp metal passing.
If your TMD IV is false tripping, use the procedures in this section to help determine the cause. The procedures
are written for a user familiar with the operator interface. The Operating the TMD IV section of this manual
describes the operator interface in detail.
Correct the Coil Imbalance
Coil imbalance can result from the transmitter and receiving coils not being aligned well. It can also result
from different amounts of metal in the conveyor structure on each side of the coils.
Use this procedure to balance the coils. Always perform this procedure first, before trying to determine any
other cause of false tripping.
WARNING.
Keep hands and clothing away from all moving or rotating parts.
1.
Stop the conveyor belt
2.
Clear the burden off the belt for four feet on each side of the coil structure
Also, check the immediate area around the support structure and on the coils and remove any loose
metal objects.
3.
Go to the Settings menu from the Run screen.
Figure 4-1. Selecting the Material Code