Filtec FT-70c, Service And Technical Reference Manual

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Chapter 6: Calibration Procedures
6-41
4. When the test is completed the Dynamic Reject Margin is
displayed. The margin is typically 2-3 sigma. If the sigma is out
of this range, you may be instructed to repeat the test at a lower
setting. Press the Arrow Key to repeat the test.
5. If the margin is within the 2-3 sigma range, COMPLETE is
displayed. Press Key 1 to proceed to the Dynamic Product
Good Test.
The Dynamic Product Good Test
The Dynamic Good Product Test is used to verify the inspection
accuracy under production conditions. You need 30 good (not
marginal) production containers to perform this test.
If you run this test with actual production flow, the FT-70 will
sense this and automatically change the sample batch size to 128.
1. Start the conveyor and run it at production speed.
2. Press the Arrow Key and you are instructed to run thirty good
production containers through the FT-70. Start them far
enough upstream so they do not slide on the conveyor as they
pass through the inspection area. If you are using production
flow the FT-70 automatically samples 128 containers.
The FT-70 must accept all 30 (or 128) containers in order to
establish the Dynamic Good Margin. The Dynamic Good
Margin compensates for fill level variance due to conveyor
motion.
3. If during this test the message LOW MARGIN, RAISE 2 TICKS
appears, then a container has failed the test. You must raise the
inspection head 2 ticks and then press the Arrow Key to repeat
the test.
4. When the test is successfully completed you are asked to set
the Underfill Threshold. During the Dynamic Reject Point Test
and the Dynamic Product Good Test the threshold is fine
tuned. Press the Arrow Key to accept the new threshold.
5. The Dynamic Product Good Test is complete. Press Key 1 to
proceed to Review Fill Level Test.
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