Thermo Scientific Oretronic III, Руководство по эксплуатации и обслуживанию

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Maintaining & Troubleshooting
4-10 Maintaining & Troubleshooting Thermo Fisher Scientific
REC-4105 Rev L
7. Scroll to the OP FREQ display and change the operating frequency
value from 0 to one of the other values (0 = 900 Hz, 1 = 780 Hz, 2 =
660 Hz, 3 = 1020 Hz).
8. Observe the bar graph.
If the number of LEDs lit decreases, this is a better operating
frequency for the TMD. Skip to Step 14.
If the number of LEDs lit does not decrease, try each value. If the
number still does not decrease, change the operating frequency back
to 0 and go on.
It may also be helpful to change the filter setting used by the TMD.
Although the default filter—filter 1—usually provides the best noise
reduction, filter 0, 2, or 3 may work better in some installations.
9. Scroll to the FILTER display and change the value.
10. Observe the bar graph.
If the number of LEDs lit decreases, this is a better filter for the
TMD. Go on to Step 14.
If the number of LEDs lit does not decrease, try each value. If the
number still does not decrease, change the filter back to 0 and go on.
11. Scroll to the FINE display and return the value to the “as found”
value recorded in Step 2.
With some highly conductive ores, the default measurement window for
detecting metal will cause false tripping similar to high electrical noise
when the ore is conveyed. The typical indication of this situation is a
low noise level when the conveyor is run empty and a higher level when
it is run loaded (as indicated by the bar graph).
This noise signal can be overcome by changing the location of the
measurement window, which determines the timing of the measurement.
Because the magnetic field from mineral ore takes longer to decay, you
need to move the measurement window farther out on the time scale so
the TMD will not be as sensitive to the signal from the ore. To move the
measurement window farther out on the time scale, you increase the
material type code number.
Adjusting for
High Product
Noise (Mineral
Ores)