Ramsey Oretronic IV Tramp Metal Detector REC 4479C
Page 17
To set up synchronization, one TMD IV
is selected to be the “master
,
” the others are “slaves.” The difference
between the master and the slaves is that the master does not have SYNC input turned on; only the slaves do.
The SYNC OUT signal on the master is connected to SYNC IN on the slaves. The master sends the SYNC signal
before it energizes its
’
transmit coil; this prevents the slave units from reading their receive coils and
interpreting the output of the master unit as tramp.
Speed Sensor
An optional belt speed sensor can be added for optimal performance with variable speed belts. Speed input
provides for accurate belt coast determination and other speed-dependent operations. The speed sensor input
is limited to 2.5 KHz.
Clip Detector
An optional belt clip detector is used with conveyor belts having metallic splices or repair clips. The detector
marks the splice so the TMD IV can momentarily reduce sensitivity while metal fasteners traverse the
detection zone. Larger tramp metal will still be detected.
High Pile Detector
The optional high pile detector is designed to help protect the transmitter coil from damage caused by
oversized material on the belt. If the transmitter coil swings away from the support structure because of
impact, the display will show hi pile, indicating that the coils may no longer be balanced. If the transmitter coil
does not swing back into position in four seconds, the alarm relays of the control are activated.
The high pile detector is available on a dual coil TMD IV only. The under belt single coil model does not have
this feature because the transmitter coil is under the belt.
Time Delay Marker
If an optional liquid spray or flag drop marker is used to visually identify the location of tramp metal on the
conveyor, a timed delay can be specified that indicates to the TMD IV how long it takes for the detected tramp
to move from the coils to the marking device. For variable speed belts, the activation of the marker is
coordinated with the measured belt speed. A marker duration variable can also adjust the length of time a
spray marker is fired, thereby controlling the length of the mark and conserving marker fluid.
System Requirements
System requirements for incorporating a dual coil TMD IV into a conveyor system can be found on the
following Engineering Drawings in Appendix A of this manual:
•
Final Assembly, Standard System (D07328C-A001)
•
Installation Placement, Standard System (D07328C-A002)
System requirements for incorporating an under-belt single coil TMD IV into a conveyor system can be found
on the following Engineering Drawings in Appendix A of this manual:
•
Under-Belt Single Coil Final Assembly (D07328C-A101)
•
Under Belt Single Coil Installation Placement (D07328C-A102)
