Safeline STANDARD SERIES, Инструкция по эксплуатации

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Page 25
b) A metal test piece is not required to set these
two parameters
13) Ensure that the photo beam(s) is/are clear of
obstructions and press the ’window time’ soft key. The
display will read ’Cal’ for 5 seconds then ’
‘Run’.
With run displayed pass a pack of the correct size and
orientation along the conveyor making sure that it is
square on to the conveyor or with a skew angle typical for
the line. The detector will automatically set the window
time based on the length of the pack.
14) Repeat step 13 two or three times to check that
window time setting is repeatable,
NOTE:-
a) Ensure that during the CAL period there are no
inadvertent interruptions of the photo-beam.
b) The Window Time is entered into memory
automatically and a correction is applied by the
microprocessor to provide a window that overlaps the
pack at the front and rear by one half pack. This ensures
an accurate and reliable reject action regardless of where
the metal contamination is within the pack.
c) The window time is automatically extended for large
pieces of metal contamination or for more than one piece
of metal contamination.
15) Press the ’sync delay’ soft key. All packs now
passed through the detector .will operate the reject
mechanism, also the detection lamp. and buzzer will
operate continuously.
Repeatedly pass a sample pack along the conveyor and
adjust the sync delay time so that the pack is rejected
accurately and consistently. Press the ’Enter’ key to store
the setting in memory.
16) Press the ’Etc’ soft key the display now reads
Signal Delay # # # #sec
Reject Time # # # #’sec
Etc
Place the sample pack with metal contaminant in
the front or rear edge on the conveyor belt and allow it to
pass through the detector without skewing or slippage.
Press the ’Reject Time’ soft key and adjust the reject time
until the metal contaminated pack is cleanly rejected.
Press the ’Enter’ key to store the setting in memory.
17) Press the ’Enter’ key the display will now read
Timer ’A/B/C’ Type tm2(G) Set/Updated
for five seconds and then returns to the main menu.
18) Further check the operation and settings of the
reject mechanism by passing contaminated packs
through the detector.
Check packs with small metal samples placed in turn at
the front and rear of the pack then repeat the tests using
larger metal samples.
Note: Under normal running conditions with packs
continuously passing along the conveyor if the gap
between a metal contaminated pack and the adjacent
pack is less than half the pack length both packs may be
rejected.
If for any reason the settings of the timer is thought to be
incorrect repeat the whole of the setting up procedure
from step 1.