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13
E-Z Tec DSP Control
Eriez’ state–of–the–art Digital Control
System provides a user–friendly
interface through a menu–driven digital
hierarchy. The digital screen offers
alphanumeric displays of all preset
functions or reject occurrences as they
take place and also records the date and
time of product changes.
Digital processing and controls on all
E-Z Tec DSP Metal Detectors allow
fast product changes. The active
(present) product can be changed via
the Touch–Screen Interface or remotely
through RS-485 computer interface
connections.
50 different product selections can be
stored with each product selection
defining such parameters as sensitivity,
gain, phase, product description and
relay states. Unauthorized changes are
eliminated by a four level security code.
Data memory retention prevents
memory loss. The control provides
user–specified self–checking and
periodic calibration procedures.
The report menu displays report number,
product, date, time and magnitude of the
reject signal. The internal memory
holds full details of the last 100 rejects
for visual review, counting up to 10,000
rejects. Reports may be uploaded to a
computer via the RS-485 interface port.
An unlimited record of reject reports can
be stored on the computer.
• Bar Graph will provide a visual
indication of the strength of the
detection signal in relation to the
metal size, and is also used to monitor
the phasing–out procedure for
products.
• Threshold adjustment allows for
setting of the detection threshold for
minimum and maximum metal
sensitivities.
• Phase adjustment provides the
user with the capability to adjust
the metal detector to minimize
product effect and the ability to
peak a response to a particular
metal.
• Shift Register stores multiple
detections for precise rejection of
metal. A tachometer input is
provided for variable product
speeds.
• Travel Time is an adjustment
controlling delay of the detection
signal output. This will allow
time for the detected contaminant
to be positioned at the
downstream reject device (such
as, air blow off, pusher arm, flip
gate, etc.). It can be set from 0-60
seconds with a 0.05 second
resolution.
• Reject Time is a variable
adjustment for extending the
reject output signal. This feature
allows the user to adjust the reject
output time from 0.05 to 60
seconds.
• Output Relays include two
individually programmable relays,
one with two form “C” contacts
and the other with one form “C”
contact.
• Frequency of operation is
optimized for the aperture size and
the product to be inspected.
• Product Speed ranges from 3 fpm
to 8000 fpm (0.02mps to 40 mps)
depending on aperture size.
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