Thermo Scientific Oretronic III, Operating & Service Manual

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Introduction
1-8 Introduction Thermo Fisher Scientific
REC-4105 Rev L
The touch panel makes it easy to enter and change values and to scroll
the displays. The displays indicate tramp count and coast count during
normal operations and are used during setup and calibration.
LEDs visible from outside the enclosure indicate NORMAL, BYPASS,
and ALARM conditions and a bar graph displays signal strength.
Optional high visibility indicators may be used to indicate NORMAL,
BYPASS, and ALARM. This option is a light bar with bright
incandescent lights that can be wired directly into the control
electronics.
A remote front panel display option using RS-485 serial
communications can be added to the main TMD control unit. Remote
display includes a separate power supply and has a distance limitation of
4,000 ft (1,219 m). Refer to Appendix B for more information about the
remote front panel option.
When two or more detectors are within 30 feet of each other, the SYNC
input feature allows for the synchronization of transmitter pulses. This
prevents the detectors from mistaking a transmitter pulse from another
detector for a metal signal.
To set up synchronization, one TMD is the “master” and the other are
“slaves.” The master does not have SYNC input turned on; only the
slaves have it on. SYNC OUT transmit on the master is connected to
SYNC IN receive on the slaves. The master only transmits; it does not
receive. The slaves only receive; they do not transmit.
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
output must not exceed 2 KHz.
An optional belt clip detector is used with conveyor belts having
metallic splices or repair clips. The detector momentarily reduces the
sensitivity of the TMD while metal fasteners traverse the detection zone.
Larger tramp metal will still be detected. Two clip detectors can be used
on variable speed belts.
Remote Front
Panel
Synchronization of
Transmitter Pulses
Speed Sensor
Clip Detector