Filtec FT-70c, Service And Technical Reference Manual

Page: 90 / 243

Chapter 4: Configuring the FT-70 for Operation
4-21
Setting the Underfill X-ray Threshold
1. Place a sample production container that is empty 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.
2. Record the X-ray Counts value that appears in the X-ray
Threshold display.
3. Repeat the previous two steps four more times and then
average the value to get the average bad count (BC).
4. Use the following equation to determine the Underfill X-ray
Threshold.
5. Press Key 1 until you reach GAMMA THRESHOLD and use
the Arrow Key to enter the Underfill X-ray Threshold Value (T)
you calculated in step 4.
6. If you are finished configuring the FT-70, press Key 5 until you
reach SYSTEM DISPLAY and then press the Arrow Key to
return to the Operate Mode.
where:
GC = Average Good Counts (step 9).
BC = Average Bad Counts (step 3).
T = Overfill X-ray Threshold.
a b c d e + + + +
( )
5
-------------------------------------------- BC =
GC BC +
( )
2
---------------------------- T =
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