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Manual Setup for Non Product Effect
Applications
Many products exhibit little or no product effect signal
when passed through the detector, these products are
often referred to as non product effect or dry products.
Typical dry product are paper, plastics, flour, rice,
noodles, etc.
NOTE
At higher detector head operating frequencies
products previously considered as dry products may
start to exhibit product effects. If this is the situation
use of the phase control may give better results, refer
to 'Manual Setup For Product Effect Applications'
below.
Manual setup may be used to optimise the detector
sensitivity, phase, frequency, and power drive settings
for non product effect applications.
When manual adjustment has been carried out to
optimise the detector performance, the final
adjustment normally required is simply a matter of
setting the sensitivity control to give the required
detection standard, i.e. 1.0, 1.5, 2.0 Fe etc.
Product number 00 has its phase setting fixed for non
product effect applications and may be used to
simplify the manual setup.
All product number settings are factory-set for non
product effect applications and therefore steps 4), 5),
and 6), will not be required on previously unused
product numbers.
1)
Enter Supervisor/Engineer access code, page 19.
2)
Select the lowest available product number (01 to
20), page 40.
3)
Set the Sens to 199, page 40.
4)
Set the 'Phase' to 0° (default setting), page 40.
5)
Set the 'Operating Frequency' to HIGH (default
setting), page 41.
6)
Set the 'Power drive' to HIGH (default setting),
page 41.
7)
Ensure the product is flowing through the
detector in its normal manner. If a product signal
is observable on bargraph display ensure the
product is flowing through the detector creating
worst case product effect conditions, refer to
'Notes On Passing A Product Through The
Detector' earlier.
28
OPERATING INSTRUCTIONS
8)
If a product signal is observable on bargraph
display adjust the sensitivity control, Sens (page
43),so that the peak signal from the product
gives 3 to 4 bars on the bargraph display(s).
Refer to note 1) below.
9)
Test the sensitivity of the detector by passing
metal samples through the aperture of the
detector (preferably positioned on or placed in
the product).
10) If required adjust the Sensitivity (page 40) to
achieve the required spherical performance
standard, i.e. 1.0, 1.5, 2.0 Fe, etc.
11) If there are other product types to be inspected
repeat this procedure from step 2).
12) Press 'PROG/EXIT' to return to the running
mode.
Note
1)
For applications where the peak product signal
indicates between 6 and 19 bars on the bargragh
displays the product may be classified as either a non
product effect or a product effect
type. In order to determine which setup condition will
give the best sensitivity it will be necessary to carry
out both types of setup (i.e. Manual Setup for Non
Product Effect Applications and Manual Setup for
Product Effect Applications). A comparison should be
made between the two sets of results and the most
favourable settings selected.
Manual Setup for Product Effect
Applications
Wet/moist product, i.e. meat, cheese, fish, soups,
sauces, etc. generate product signals when passed
through the detector. At high sensitivity settings the
signal will normally be clearly visible on the bargraph
display.
Manual setup may be used to optimise the detector
phase, sensitivity, frequency, and power drive settings
for product effect applications.
4618 - 021
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