Thermo Scientific Oretronic III, Operating & Service Manual

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Maintaining & Troubleshooting
Thermo Fisher Scientific Maintaining & Troubleshooting 4-5
REC-4105 Rev L
1. Stop the conveyor belt.
2. Clear the burden off the belt for four feet on each side the coil
structure.
Also, check the immediate area around the support structure and on
the coils and remove any loose metal objects.
3. Place the TMD in Setup/Calibrate mode.
4. Scroll to the MAT CODE display and verify that the material type
code shown in the counter is 3. (For mineral ores, this value should
be 4.)
5. Scroll to the COARSE display and write down the “as found” coarse
sensitivity value shown in the counter, and then set the value to 2.
6. Scroll to the COIL BAL display and observe the LED bar graph.
There should be fewer than five LEDs lit on either side of the
middle of the bar graph. The LEDs may be going on and off and
changing sides (from top to bottom and visa versa).
If five or more LEDs are lit, you need to manually balance the coils.
If the coil imbalance exceeds the ability of the TMD to self-balance,
the ALARM indicator lights and the BALANCE fault message
appears in the display. Press ENTER to clear the message and
proceed with Step 7.
7. Adjust the coil position for your TMD model as follows.
For a dual coil TMD:
• Use the adjusting bolts on the swing arm stop.
• As the transmitter coil is moved, the bar graph display will
change. Find the position where the minimum number of LEDs
in the middle of the bar graph are lit.
• If the balance improves significantly, proceed with Step to “fine
tune” the coil balance.
• If adjusting the transmitter coil does not affect the bar graph
significantly, move the TMD coil frame a few inches towards
WARNING
K e e p h a n d s a n d c l o t h i n g aw a y f r o m a l l m o vi n g o r
r o t a t i n g p a r t s .