Thermo Scientific Oretronic III, Руководство по эксплуатации и обслуживанию

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Maintaining & Troubleshooting
Thermo Fisher Scientific Maintaining & Troubleshooting 4-7
REC-4105 Rev L
False tripping often occurs from mechanical vibrations that produce
background noise. The TMD software has signal processing to
recognize the difference between a signal from metal passing through
the coils and a signal from metal vibrating in the region of the coils.
However, severe metal vibrations can sometimes produce the same
signal as the metal passing through the coils.
Electrical disturbances from the conveyor belt motor or the wiring from
the motor may also produce noise that interferes with TMD operations.
Even other electrical systems near the TMD may be generating the
noise.
Follow this procedure to find the source of mechanical or electrical
noise.
1. Balance the coils as evenly as possible using the procedure from
“Correcting Coil Imbalance”.
2. Scroll to the fine display and write down the “as found” fine
sensitivity value shown in the counter, then set the value to 950.
3. Watching the LED bar graph, press a Value key to increase or
decrease the fine sensitivity value until about 70 percent of the
LEDs are lit. (The actual number of bars lit will change
continuously; 70 percent is an average.)
Finding the
Source of
Mechanical or
Electrical Noise