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Timer Type - tm3 and tm3G
The detector needs to be told the time taken for a
contaminated product to travel from the centre of the
detector aperture to entering the reject bin. This
period plus a small safety margin is known as the RC
Window time and must be entered by the user.
NOTE
The RC Window time must be set with the conveyor
running at its slowest rate, to ensure proper operation
over the rest of its variable speed range.
Important Notes
1)
The reject timer (i.e A, B or C) must have been
set-up prior to adjusting the RC extension/
window time
2)
Small size metal contaminants (test samples)
should be used to set the RC extension/ window
time. The use of large test samples will produce
errors in the setting. If this is not possible use
the smallest test sample available and adjust the
sensitivity so that the test sample gives an
indication of 2 or 3 red bars on the bar graph
display.
Loose Product, Fixed Speed Applications
1)
From the running mode display press
PROG/EXIT key.
2)
Enter the Engineers security code.
3)
Press ETC soft key until the Reject Confirmation
display is reached.
4)
Press the RC exten. time soft key.
5)
Set the extension time to 100 ms.
6)
Pass a test sample through the detector
aperture to trigger the detector.
The reject mechanism will respond according to
its settings. When the reject mechanism is
released and moves from reject back to the
pass position the RC Sensor confirms reject
operation, providing the extension time setting
is long enough.
7)
If the detector goes into a reject fault condition,
increase the extension time by a further
100 ms.
8)
Repeat step 6) and 7) until the detector signals
no fault condition.
106
OPERATING INSTRUCTIONS
3)
For packaged product position the test Sample
on top of the pack at the front/leading edge.
9)
increase the extension time by 200 ms and
press the ENTER key to enter the new value
into memory
Packaged Product, Fixed Speed
Applications
1)
From the running mode display press
PROG/EXIT key.
2)
Enter the Engineers security code.
3)
Press ETC soft key until the Reject Confirmation
display is reached.
4)
Press the exten. time soft key.
5)
Set the extension time to I00 ms.
6)
Pass a pack containing the test sample through
the detector aperture to trigger the detector.
The reject mechanism will respond according to
its settings. The rejected pack when leaving the
conveyor or entering the reject bin will pass the
RC sensor, which will confirm reject operation
to the RCU providing the extension time setting
is long enough.
7)
If the detector goes in to a reject fault condition,
increase the extension time by a further 100 ms
4618-021
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