Filtec FT-70c, Service And Technical Reference Manual

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Chapter 4: Configuring the FT-70 for Operation
4-19
Configuring the X-ray Threshold
The X-ray Threshold defines the x-ray radiation count that is the
dividing line between accepting or rejecting a container during fill
level inspection.
Before you configure the X-ray Threshold, you must have aligned
the Fill Level Inspection Beam properly as explained in
Aligning
the Fill Level Inspection Beam .
1. Remove the FT-70 cover and set dip switch S1-1 to the proper
setting for the type of fill level inspection you want to perform:
• Overfill Inspection: S1-1 = open
• Underfill Inspection: S1-1 = closed
2. Replace the cover.
3. Open the radiation source shutter by pulling the actuating rod
out until it stops.
4. Start the conveyor and run it at the maximum production
speed.
5. If your FT-70 is not in the Calibrate Mode, Press Key 5 until you
reach SYSTEM DISPLAY and then press the Arrow Key to
enter the Calibrate Mode.
6. Press Key 1 until GAMMA THRESHOLD appears.
7. Place a properly filled sample production container on the
conveyor far enough upstream of the FT-70 so that it does not
slip on the chain and is positioned correctly as it passes
through the inspection tunnel.
8. Record the value that appears in the X-ray Threshold display.
9. Repeat the previous two steps four more times and then
average the value to get the average good count (GC).
a b c d e + + + +
( )
5
-------------------------------------------- GC =
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