Foil detection sensor

After capping, every bottle passes under the foil detection sensor. It checks that the cap contains its aluminium foil liner. Bottles with foil pass; bottles without foil are rejected, because they cannot be induction sealed (I-07). The sensor is mounted on a threaded column: the large knob raises or lowers it to suit the bottle height. Its display and indicator lights show the reading and the output; the setting buttons are for authorised staff only.

1. 1Set the sensor height with the large knob so it sits just above the cap and is centred over it; lock it.
2. 2Check the display and indicator lights respond as each bottle passes.
3. 3Pass a bottle with a cap that has no foil: it must be rejected.
4. 4Pass a correct bottle: it must pass.
5. 5If either test fails, stop. Re-check height and centring; only authorised staff may change the sensor settings with its buttons.
6. 6Record the challenge test at start-up, after stops or adjustments and at batch end.