Thermo Scientific Oretronic III, Operating & Service Manual

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Maintaining & Troubleshooting
Thermo Fisher Scientific Maintaining & Troubleshooting 4-13
REC-4105 Rev L
5. Follow the procedure in Correcting Coil Imbalance on page 4-4 to
balance the coils. Follow the procedure in Mechanical or Electrical
Noise on page 4-7 to reduce system noise.
Some false trips may occur from the clips used for belt repair or
splicing. Check the installation of the clip detector(s) to make sure they
are positioned correctly. (Refer to the appropriate Installation Placement
drawing for your system.)
Make sure you have correctly determined the clip delay, which is
designed to prevent the TMD from tripping when a clip goes through.
(Refer to “Determining Clip Delay”.) Calibrate the system for clip
detection and delay as described in Section “Determining Clip Delay”.
A false trip on a clip can usually be easily diagnosed. The TMD will
trip just as or just after a clip has passed. If the conveyor is wired to stop
on a trip, the clip will generally be the same distance downstream from
the coils each time the trip occurs and the belt is shut down. False
tripping from clips is generally caused by one of three conditions:
• The clip detector did not see the clip
• The clip delay is too short
• The clip sensitivity is too high
Follow this procedure to determine whether the clip detector saw the
clip.
1. Reset the TMD (press the RESET key) and wait for a false trip.
2. Check the display to see if it shows CLIP.
3. If the display does not show CLIP, scroll to the CLIP DLY display
and check the value shown in the counter.
If the value is 0, clip detection is not active.
4. Determine the correct clip delay (refer to Determining Clip Delay on
page 2-17) and enter the value.
5. Repeat Steps 1 and 2 of this procedure.
If the display still does not show CLIP, the clip detector is not
working properly.
Adjusting for Clip
(Belt Splice)
Detection