Safeline STANDARD SERIES Instruction manual

Reference number : 4618 - 007
STANDARD SERIES
METALDETECTORS
INSTRUCTION MANUAL
FIRMWARE 2.01 TO 2.49
Supplied by:
SAFELINE LTD
MONTFORD ST, SALFORD, ENGLAND
Tel: 44 (0)161 848 8636
Fax: 44 (0)161 888 2292
Copyright © Safeline limited, 1990, 1997, 1998
No part of this document may be reproduced, or translated, in any form, electronic or
otherwise without the prior written consent of Safeline limited.
Neither Safeline nor its Agents will be liable for incidental or consequential damage in
connection with the use of this document.
Safeline reserve the right to change the contents or form of this manual at any time without
prior notice having been given.
This detector must only be used for the express purposes as advertised by Safeline and as
referred to in this and other Safeline approved literature.
Aims of this manual.
This manual is intended to help those customers who need to:
1)
Install the detector.
2)
Commission the detector subsequent to installation or replacement.
3)
Operate the detector on a day to day basis.
4)
Change some of the product dependent and installation dependent parameters.
5)
Communicate with the detector using serial communications.
6)
Arrange a maintenance schedule using the printer option.
This manual is NOT intended as either1)
2)
3)
A Service Manual, (although some fundamental diagnosis is included in this manual).
A Workshop Manual - No detailed technical analysis, either mechanical, electrical or electronic is
contained in this manual.
Commercial information - for example sales literature or publicity information.
Safeline technical publications are designed to be backwardly compatible with all previous versions of detectors
in the family. This means that the later issues of manuals will be fully compatible with older equipment, however
the older equipment may not have all of the features of later manuals.
NOTE.
An upgrade service is available from Safeline, at a fee, that will upgrade older detectors to the latest
specification, where possible. Please contact your supplier’s technical departments for information on this
service. Remember to have your serial number ready when making the call.
Published in England
Amendments
Safeline have a policy of updating manuals to include new features, correct erratum, or incorporate customers
requests. The Amendment Record below is provided for the express purpose of the customer, or supplier, to
record any amendments that may have been included in this document.
For further information or to order copies of this document contact Safeline Ltd. at the address shown on the title
page of this document, quoting the reference number given on the title page.
If the document was purchased directly from Safeline, or the supplier is unavailable at the supplier address
given, then contact Safeline directly via the address given on the title page of this document.
If the owner of the manual has any comments or suggestions as to the form, content or presentation of this
manual then they should write their suggestions and send them to the Technical Department at the Safeline
address given on the title page.
Amendment Record
If you receive an update for this manual then:
1.
Attach the update sheet(s) to the rear of the manual.
2.
In the row whose 'Amendment’ number matches that of the received amendment:a) Print your name in the 'Incorporated By’ box.
b) Print the 'Date' box with the date you updated the manual.
AMENDMENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
Issue 9
Issue 10
Issue 11
Issue 12
Issue 13
Issue 14
Issue 15
INCORPORATED BY
Safeline Ltd
Safeline Ltd
Safeline Ltd
Safeline Ltd
Safeline Ltd
Safeline Ltd
Safeline Ltd
DATE
May 1998
Sept 2000
Sept 2001
July 2002
October 2002
July 2003
Jan 2004
Page iii
Warnings and Cautions
WARNING
THE ABOVE CAPTION IDENTIFIES AN OPERATING PROCEDURE OR PRACTICE THAT COULD RESULT
IN PERSONAL INJURY OR DEATH.
!
CAUTION
The above caption identifies an operating procedure or practice that could result in damage, or
destruction, of the detector, the process or its surroundings.
The above caption is used to draw the readers attention to a note of extra importance.
!
CAUTION
This manual is regarded as an integral part of the detector.
This manual must always be kept with the detector for the whole of its operating life.
This manual includes all the features available with the firmware version 2.01 to 2.49. Please note that
all these features may not be included as standard.
WARNING
WHEN THIS CAPTION IS SHOWN ON THE EQUIPMENT IT IS USED TO INDICATE THE POSSIBILITY OF
ELECTRIC SHOCK.
!
CAUTION
WHEN THIS CAPTION IS SHOWN ON THE EQUIPMENT IT IS USED TO INDICATE THAT THE MANUAL
MUST BE CONSULTED BEFORE PROCEEDING.
Page iv
Handling instructions
The detector does not contain any exposed noxious or dangerous substances.
When transporting and handling the detector damage may result if the lifting equipment (i.e. sling, cable
assembly or by hand) passes through the aperture of the detector. The diagrams below show the incorrect way
and the correct way to lift and support the detector during transportation.
CORRECT
INCORRECT
Safeline does not recommend the lifting or supporting of the detector by a person. Always use suitable lifting or
supporting apparatus. Safeline will accept no liability for personal injury caused by attempting to lift or move the
detector without the aid of a mechanical apparatus.
If supporting the detector in a sling or other lifting apparatus always ensure that the detector is securely held
and is not likely to unbalance during lifting.
Page v
Safety Instructions
Most companies have a code of practice for their employees which is designed to ensure their safety in the
working environment. When new equipment is introduced it is important that operators, maintenance engineers
and supervisors are aware of the potential hazards.
The following guidelines must be followed by any person concerned with the operation, installation or handling
of the detector to ensure correct operation and to avoid any damage to the detector or to the person concerned.
WARNING
The equipment should only be used in accordance with the instructions given herein. Failure to comply
with these instructions may lead to the protection provided by the equipment becoming impaired.
Safeline will not be liable for incidental or consequential damage if the equipment is not installed in
accordance with the instructions given.
WARNING
On no account should any of the electrical panels of your detector be opened by anyone other than a
qualified electrical engineer. Voltages in excess of 30 volts rms or 50 volts DC. can, in certain
circumstances be lethal. When working on electrical or electronic equipment always follow current
health and safety practices and observe all other applicable regulations.
!
CAUTION
For correct operation and to prevent any damage to the detector follow the instructions given in this
document under the heading 'Installation'.
!
CAUTION
In accordance with EN 61010-1:1993 this equipment has been designed to be safe at least under the
following conditions:
Indoor use.
Altitude up to 2000m.
Storage temperature: -10 °C to +50 °C (15 °F to 120 °F)
Operating temperature: -10 °C to +45 °C (15 °F to 110 °F)
Maximum relative humidity 93% for temperatures up to 45°C.
For connection to TN (EN60950:1992) power distribution systems only, for connections to other power
distribution systems please contact your supplier.
Mains supply voltage fluctuations not to exceed +10%/-15% of the nominal voltage.
Transient overvoltages according to INSTALLATION CATEGORY III.
Pollution degree 2 in accordance with IEC 664.
Page vi
Detector Precautions
!
CAUTION
During installation and operation of the detector the following points must be considered. Failure to do so may
result in difficulties of operation, degradation in the performance or damage occurring to your detector.
1.
Electric Arc Welding
Electric Arc Welding must not be carried out on the detector or on any part of the attached conveyor
system.
If Electric Arc Welding must be carried out on any attached systems, disconnect and remove the detector
head and detector power supply box prior to welding.
2.
Power Source
It is recommended that the power source should be taken from a source which supplies only low power
equipment.
It is recommended that the detector should not be connected to power sources which are supplying
varying current loads, e.g. Invertors, variable-speed drives etc.
It is recommended that the power source for the detector should be connected via an independent spur.
The power source for the detector should be fitted with an isolation switch and the appropriate circuit
breaker and/or fuse.
3.
Electromagnetic Interference
It is recommended that the detector should not be installed in close proximity to any devices which may
emit electromagnetic interference e.g. Radio transmitters.
Ensure all Inverters and variable-speed drives in the proximity of the detector are installed in full
accordance with their manufacturers instructions.
Where possible avoid placing any cables from Inverters, variable-speed drives etc. in close proximity to
the detector or the detector cables.
In particular take care to avoid placing the detector in the proximity of any equipment that generates
electromagnetic interference in the same frequency range as the detector.
4.
Magnetic Fields (Ferrous Detectors Only)
It is recommended that this type of detector should not be installed in close proximity to any potential
source of magnetic fields.
5.
Metal Free Zone (M.F.Z.)
To achieve the optimum detector performance, an area surrounding the aperture of the detector known
as the Metal Free Zone (M.F.Z.) must be kept free of metal.
The size of this zone will be dependant upon the type of detector, the detector’s aperture height and the
detector’s operating sensitivity.
Stationary metal may be positioned closer to the detector than moving metal.
Typical values of M.F.Z for standard metal detectors are:
M.F.Z. = 1.5 x aperture-height for stationary metal
M.F.Z. = 2.0 x aperture-height for moving metal.
Typical values of M.F.Z for Ferrous detectors are:
M.F.Z. = 1.5 x aperture-height for stationary non-Ferrous metal
M.F.Z. = 2.0 x aperture-height for moving non-Ferrous metal.
M.F.Z. = 2.0 x aperture-height for stationary Ferrous metal
M.F.Z. = 3.0 x aperture-height for moving Ferrous metal.
Page vii
6.
Avoiding aperture damage
At all times ensure that the product does not come in contact with, or impact onto the detector aperture or
aperture lining.
7.
Handling and lifting
When transporting and handling the detector damage may result if the lifting equipment (e.g. sling, cable
assembly or by hand) passes through the aperture of the detector.
Never pass any lifting or supporting equipment through the detector aperture.
Always observe best practices for handling heavy items when lifting or moving the detector.
8.
Detector support structures
Avoid supporting the detector on vibrating structures and/or machines subject to mechanical shock.
No part of the supporting structure should rely on the detector for structural integrity.
No part of the supporting structure should be attached to the detector other than through the detector
mounting blocks supplied.
9.
Belt maintenance
Certain substances (e.g. metal fragments, liquids etc.) which can be detected by the metal detector are
likely to cause unexpected detections (often giving the appearance of erratic/incorrect operation) if they
adhere to the conveyor belt.
To minimise the chance of this occurring:
a)
Avoid any operations that may cause metal fragments to come into contact with the conveyor
belt.
e.g. welding, metal drilling or cutting in the vicinity of the conveyor belt.
b)
Clean the conveyor belt regularly.
10.
Orientation of contaminants
Metal detector sensitivity is expressed as the diameter of the smallest spherical object which can be
detected. (i.e. diameter of a ball).
Sensitivity to non-spherical objects of the same material (e.g. wire fragments) will vary according to the
orientation of the object as it passes through the detector aperture. If the diameter of the object is less
than the stated spherical sensitivity the object may not be detected.
11.
Product packaging materials
To achieve the optimum detector performance in applications where the product being inspected is
packaged - ensure that the packaging materials used are free from metal contamination.
12.
Continuous maintenance and testing
It is recommended that at regular intervals testing with an appropriate test sample is performed to ensure
the detector and any attached reject mechanism is functioning correctly.
It is recommended that inspection and cleaning of the detector system should be carried out at regular
intervals.
Page viii
CONTENTS
PRELIMINARY PAGES
Aims of this manual. ...................................................................................................................................................... ii
Amendments..................................................................................................................................................................iii
Warnings and Cautions ................................................................................................................................................ iv
Handling instructions ..................................................................................................................................................... v
CONTENTS ..................................................................................................................................................................IX
LIST OF ILLUSTRATIONS ......................................................................................................................................... 10
SPECIFICATION - STANDARD SERIES DETECTORS.............................................................................................. 1
BASIC TECHNOLOGY ................................................................................................................................................. 1
INSTALLATION ............................................................................................................................................................ 5
REJECT TIMERS – GENERAL .................................................................................................................................. 19
PROGRAMING THE DETECTOR .............................................................................................................................. 30
APPENDIX A............................................................................................................................................................... 38
Speed Sensor Requirements ...................................................................................................................................... 38
Speed Sensor Electrical Connections ......................................................................................................................... 38
Producing A Rotary Encoder Using A Proximity or Photo-electric Sensor.................................................................. 38
Disc Construction......................................................................................................................................................... 39
Determining The Required Shift Distance Of The Speed Sensor ............................................................................... 39
APPENDIX B ............................................................................................................................................................... 41
APPENDIX C ............................................................................................................................................................... 43
CONNECTION OF PRINTER TO DETECTOR........................................................................................................... 44
APPENDIX D ............................................................................................................................................................... 45
RECOMMENDATIONS FOR THE USE OF INVERTERS .......................................................................................... 61
ATEX DIRECTIVE ............................................................................................ ERROR! BOOKMARK NOT DEFINED.
ATEX system label ........................................................................................................Error! Bookmark not defined.
ATEX Static warning label .............................................................................................Error! Bookmark not defined.
ATEX Enclosure warning label .....................................................................................Error! Bookmark not defined.
Page ix
LIST OF ILLUSTRATIONS
Figure
1
2
3
4
5
6A
6B
6C
7
8
9
10
11
Page
Vector diagram.................................................................................................................................
Detector coil system signals ............................................................................................................
Effect of phase control .....................................................................................................................
Effect of phase control adjustment ..................................................................................................
Metal Free Zone Guidelines - Standard Series Detectors ...............................................................
Layout of Components and Terminals for P/S Connection PCB issues - 6 and 7 ..........................
Power connections...........................................................................................................................
Cable Gland Assemblies for Power Supply Units............................................................................
Roller Shaft Insulation......................................................................................................................
Bearing Block Insulation ..................................................................................................................
Mounting Foot Insulation..................................................................................................................
Belt Joints.........................................................................................................................................
Control Panel ...................................................................................................................................
Page x
3
4
4
4
5
8
9
9A
9B
9B
10
10
11
THIS MANUAL INCLUDES ALL THE FEATURES AVAILABLE WITH THE FIRMWARE VERSION 2.01 to 2.49
PLEASE NOTE THAT ALL THESE FEATURES MAY NOT BE INCLUDED AS STANDARD.
NOTICE
The information contained in this document is subject to change without
notice.
All efforts have been made to ensure the accuracy of this manual. However,
should any error be detected, Safeline would greatly appreciate being
informed of them.
The above notwithstanding, Safeline can assume no responsibility for error in
this manual or their consequences.
No part of this document may be photogated, reproduced, or translated to
another language without the prior written consent of Safeline.
SPECIFICATION - STANDARD SERIES DETECTORS
Product speed
BASIC TECHNOLOGY
Selectable high and low from the control panel,
low - x 1, high - x 3
High frequency low power electromagnetic coil
system.
Low - 0.05 to 2.5 metres / min. / mm. of aperture
height
(4 to 200 feet / min. / inch of aperture height)
Frequency of Operation
Crystal controlled in the range 10 kHz to 500kHz
staggered frequency versions available.
High - 0.05 to 7.5 metres / min. / mm of aperture
height
(12 to 600 feet / min. / inch of aperture height)
Input Power
Higher and lower speeds available on request
Voltage 85 to 265 V AC, Current 1.5 amps max.
Frequency 47 to 440 Hz.
Relay Output
For cases where conformance to various safety
specifications (UL, CSA, etc.) are required, input
voltage range will be 85 to 250 V AC.
Two sets of volt free change over contacts
Rating 5 amps at 250 V AC/30 V DC non- inductive
Alarm Timers
For connection to TN (EN60950:1992) power
distribution systems only. For connections to other
power distribution systems please contact your
supplier.
See timer section in manual.
Counters
Temperature Range
Operating
-10 °C to +45 °C (14 °F to 110 °F)
Storage
-10 °C to +50 °C (14 °F to 120 °F)
If the maximum counter value is reached, the next
increment will change the digits to *.
Both counters are independently resetable from the
control panel.
Humidity Range
Reject Counter.
Maximum relative humidity 93% for temperatures
up to 45°C.
Counts reject relay operations, not the number of
detections or the number of rejects.
Warm Up Time
Maximum counter value - 9999
Zero seconds at an ambient temperature of 20 °C
Pack Counter
Balancing
Requires an on line Pack Sensor if a gated timer is
not used.
Automatic - fast switch on (5 seconds typical)
Maximum counter value - 16777214
Internal Battery Backup
Maximum count rate - 3000 packs/minute at a pack
space ratio of 1:1.
Cell life - 5 years
Discharge time - 6 months from power off at temp.
O
of 20 C
Page 1
Spherical Sensitivity
RS232 Communication
Dependent on aperture size, and frequency of
operation, all sensitivity information is expressed in
diameters of spherical samples.
Two communication ports COM1 and COM2 both
accessible from the P/S Connection PCB within the
Power Unit Enclosure.
Non spherical objects such as wires will exhibit an
orientation effect, ie. they can be more easily
detected in certain axis. If the diameter of the wire
is less than the spherical sensitivity setting the
sample may not be detected in all orientations.
Both communication ports are typically + 9 V levels
and use the following data format:-
Sensitivity Ratios
Dependent on frequency of coil system e.g. at
300 kHz
Non Ferrous x 1.1 Fe to 1.3 Fe diameter
(depending on the metal)
Baud rate:
9600
Data bits:
7
Start bits:
1
Stop bits:
1
Parity bits:
1 Odd
COM1
Stainless Steel type A x 1.2 Fe dia.
Stainless Steel type B x 1.3 Fe dia.
Stainless Steel type C x 1.5 Fe dia.
4 or 2 wire control.
Sensitivity Gradient
2 wire control.
COM2
Less than two diameters.
This is the difference in sensitivity measured at the
centre of the aperture and the sensitivity at any
other point in the aperture not closer than 10 mm to
the surface.
Environmental Protection
Painted version
IP66, NEMA 4
Stainless steel version IP66, NEMA 4X
For more hostile environments a protective cover is
available for the control panel.
To achieve the specified protection the module and
power unit cover must be torqued down to 5 N.m
(45 in.lbs), or 4.5 N.m (40 in.lbs) for the module if
the environmental protection cover is used.
Sound Output
Less than 62 dBA at a distance of 1m (without
printer).
Page 2
BASICS ABOUT METALDETECTORS
Vibration signals can be represented in the same
way as signals, generated by metal particles. ie a
vector with amplitude and phase.
Basic Principles of Operation
Safeline detectors utilise a low power high
frequency magnetic field coil system which has the
ability to sense minute disturbance created by
metal particles. A metal particle passing through
the aperture of the detector will create changes in
the magnetic field inside the detector.
The vibration signal is used as a reference when
comparing the phase angle of signals from the coil
system. For example, If we say stainless steel has
a particular value of phase angle, the phase angle
is the angle relative to vibration. Reasons for
selecting vibration as the reference phase will
become apparent.
The changes in the magnetic field will generate
electrical signals in the coil system which can be
characterised by the parameters Phase and
Amplitude.
Product Effect
The amplitude/size of the signal is related to the
size of metal particle, the larger the metal particle
the greater the amplitude of the signal.
Metal detectors are used to inspect all types of
products.
Food, pharmaceuticals, plastics,
chemicals and many others.
Different types of metal generate signals which
differ in phase. Phase or more precisely phase
angle, it is a comparative term and is a
measurement of phase relationship relative to some
reference.
Some products exhibit a 'product effect'. ie the
product itself generates a signal in the same way as
a metallic particle. This results from the bulk
conductivity of the product at high frequency.
For most products, usually dry products, the
product effect is negligible. However, wet or moist
products, e.g. meat, sauces, soups etc generate a
large product effect signal which will influence the
effective operating sensitivity of the detector.
Product effect signals may be represented diagramatically as a vector with phase and amplitude
in the same manner as the signals from metallic
particles.
Phase Discrimination
Fig. 1
The Safeline detector contains phase discrimination
circuits which discriminate between the wanted
signals from metal particles and the unwanted
signals from vibration and product effect, i.e. it
minimises the effects of the unwanted signals
Diagram Fig. 1 shows the typical phase relationship
of various signals from the detector. All signals
generated by the metal detector coil system can be
represented in this manner, i.e. a vector with
amplitude and phase angle.
Probably the simplest way of reducing the vibration
or product effect signals would be to adjust
the sensitivity control. However, the sensitivity
control reduces the sensitivity to all signals, metallic
signals, vibration and product signals alike.
Vibration Signals
What is required is a more selective adjustment that
will discriminate between different signals.
The phase discriminator does this, it selectively
reduces the signals from vibration or product effect
with minimal effect on the metallic signals.
Great care is taken in the design and manufacture
of the Safeline detectors to minimise the effect of
vibration on the performance of the detectors.
However mechanical disturbances do create
vibration signals from the coil system.
Page 3
A
comparison
can
be
made
with
a
commercial/domestic Hi-Fi system. The volume
control of the Hi-Fi increases/decreases the
amplitude of all signals just like the metal detector
sensitivity control. The bass control of the Hi-Fi
selectively controls the low frequency notes only.
This is similar to the phase discrimination circuit,
however the phase discrimination circuit in the
Safeline metal detector is very much more
selective.
Signals from the detector coil system can also be
represented as shown in Fig 2.
Fig. 4
It can be seen from Fig. 4 that the effects of
unwanted signals may be minimised by aligning the
phase discrimination with the unwanted signal,
such as product signals.
When aligned the
amplitude of unwanted signal required to trigger the
detector will be increased.
Fortunately, most products do not give a significant
product effect signal, this allows the phase
discriminator to be used for rejecting vibration
signals. The optimum setting of phase is 0000. ie
aligned to vibration this gives the maximum
rejection of vibration signals and equalised
sensitivity.
Fig. 2
The characteristic of the phase discrimination.
circuit is as shown in Fig. 3 and may be positioned
by changing the phase setting.
In general, if the phase discrimination is aligned to
some angle other than vibration, the detector's
sensitivity to ferrous metal will increase and the non
ferrous/stainless
steel
sensitivity
decrease.
Vibration effects will also become more noticeable.
Fig. 3
Page 4
INSTALLATION
GENERAL
It is the effect of the leakage magnetic field on the
surrounding metalwork that may influence the
detectors performance and can give rise to
spasmodic detection signals and inconsistent
performance.
Safeline advise users to carefully study the
installation advice provided; a little care taken
during installation will avoid the detectors
performance from being severely impaired.
A little care when installing the detector will be
rewarded by a consistent, highly reliable metal
detector performance.
Safeline detectors utilise a low power high
frequency magnetic field coil system which has the
ability to sense minute disturbances created by
metal particles.
Metal Free Zone (MFZ)
Steel, aluminium, stainless steel any type of metal
particle when passed through the aperture of the
detector will create changes in the magnetic field of
the detector. These changes generate electrical
signals in the coil system.
To achieve optimum metal detector performance,
an area surrounding the aperture of the detector
known as the MFZ should be kept free of metal.
The size of this surrounding area will be dependent
upon the aperture size, the type of detector and the
operating sensitivity.
Most of the detectors high frequency magnetic field
is contained within the metal case of the detector
head. Unavoidably there is some leakage of the
magnetic field from the aperture of the detector.
Stationary metal may be positioned closer to the
detector than moving metal. MFZ guidelines for
standard series detectors are as shown in fig 5.
Please consult the product data sheet for MFZ of
other types of metal detector.
Fig. 5 Metal Free Zone Guidelines - Standard Series Detectors
Page 5
Magnetic Loops
The design and Construction of the metal detector
support framework can be very influential on the
overall performance of the detector.
A metal
detector with excellent vibration characteristics, if
mounted on a structure containing magnetic loops
can be made to look extremely poor and very
sensitive to vibration.
Installing the Detector Head
Metalwork, even though positioned outside the
normal metal free zone can still act as an aerial or
receiver for the magnetic field from the detector
making the whole framework susceptible to loop
effects.
Avoid supporting the detector head on vibrating
structures and/or machines subject to mechanical
shock.
Every effort is made to minimise the effect of
mechanical vibration on the detector head.
However, better sensitivity may be achieved if
vibration from other machines is isolated from the
detector.
Also, remember to position the detector in such a
way to allow removal of the control unit for
servicing.
The leakage magnetic field from the aperture of the
detector can generate minute electrical currents
that flow in the surrounding metalwork. They in turn
influence the detector. An electric current will flow if
a closed electrical path or loop exists.
Provided with the detector are four plastic insulation
sets for mounting the detector feet on to the support
structure. It is important these items are used to
mount the detector to its support framework.
A typical installation could be a standard series
detector mounted on a metallic conveyor frame with
rollers positioned across the frame, page 60.
When installed correctly the detector head should
be electrically insulated/isolated from the support
structure and connected to earth/ground only
through its own electrical connections.
The magnetic field from the detector can radiate
into the conveyor frame, and this in turn would
create minute electrical currents which can flow
through the closed path or loop created by the
rollers across the conveyor frame.
If other ground paths to the detector exist they will
create a ground loop which will cause intermittent
triggering of the detector.
Problems with loops can be avoided by opening or
closing the loop in a permanent manner. It is the
intermittent nature of a loop path that causes
intermittent triggering of the detector.
Installing the Power Unit
WARNING
The problem with the rollers on the conveyor can
be overcome by insulating one end of the roller
from the conveyor frame. This may take the form of
plastic insulation plate and washers on the bearing
mounting block or supply a plastic extension to end
of the roller shaft (see fig. 7). By insulating the
roller in this way the loop is opened permanently.
Ensure all power has been disconnected from the
detector before attempting to work on any electrical
components of the detector.
WARNING
If the detector is supplied as part of a system, read all
the system literature before commencing electrical
installation
The conveyor frame itself should be of welded
construction rather than bolted sections. A welded
construction is an example of a permanently closed
loop.
The power unit may be situated at a convenient
position remote from the detector head. Detection
heads are normally shipped from the factory with a
cable length of three metres.
Any items bolted to the conveyor frame, particularly
items positioned across the conveyor (e.g. guards)
potentially create loops.
To avoid difficulties
insulate/isolate all items bolted to the frame.
When installing the power unit cables avoid running
the cable adjacent to other cables carrying switched
or heavy loads. This will reduce the possibility of
problems with electrical interference.
Electrical connections to the power unit are as
shown in Fig. 6A.
Details of power supply
Page 6
connections and the position and rating of the
recommended circuit breaker are shown in Fig. 6B.
These instructions are for connection to TN
(EN60950:1992) power distribution systems only.
For connections to other power distribution systems
please contact your supplier.
Arrangement of the gland assemblies for
connecting the power cable to the power unit box
are shown in Fig. 6C.
An information booklet is available with more
detailed Guidelines regarding metal detection
conveyor design.
NOTE - with reference to Fig. 6A
If the P/S Connection PCB fitted is an earlier unit
(Issue 4 or 5) then it will not include the two
connectors for terminals 57 to 74. However all other
connectors (for terminals 1 to 56) remain the same
allowing earlier P/S Connection PCB units to be
used, providing the user does not require the
functions offered by the missing terminals.
Page 7
1
45 46 47 48 49 50 51 52 53 54 55 56
FUSE F1: 3.15A (T)
(ON POWER SUPPLY MODULE
UNDERNEATH THE
CONNECTIONS BOARD)
NOT A USER SERVICABLE PART
2
3
4
5
6
7
8
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
9 10 11 12 13 14 15 16 17 18 Layer 1
20 21 22 23 24 25 26 27 28
19
OPTIONAL
REJECT CONFIRMATION
UNIT CIRCUIT BOARD
57 58 59 60 61 62 63 64 65
FUSE: F2: 1.0A (T)
or
ELECTRONIC FUSE
66 67 68 69 70 71 72 73 74
4
5
6
7
8
20 21 22 23 24 25 26 27 28
LINK
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
9 10 11 12 13 14 15 16 17 18 19
USER
RS232
LATCH
LATCH
RESET
RESET
TXD
RXD
GND
REMOTE RESET
DETECT SIGNAL
3
RL2
(NOTE 3)
LIVE
NEUTRAL
EARTH
EARTH
SW. LIVE
SW. NEUTRAL
N/O
COMMON
N/C
N/C
COMMON
N/O
SPARE
N/O
COMMON
N/C
N/C
COMMON
N/O
2
RL1
(NOTE 2)
1
85 TO 265 V AC
47 TO 440 Hz
45 46 47 48 49 50 51 52 53 54 55 56
CONCLAMP AND GLAND FITTING
(SEE FIG. 6B AND 6C)
SPARE
+15 V
0V
OUTPUT.
SPARE
+15 V
0V
OUTPUT.
SPARE
+15 V
0V
OUTPUT.
RED
BLACK
WHITE
BLUE
BROWN
PURPLE
SPARE
YELLOW
TURQUOISE
ORANGE
GREEN
GREY
PINK
BLUE
RED
BLACK
PACK
SENSOR
SPEED
SENSOR
RCU
SENSOR
DETECTOR
HEAD
CABLE
CONNECTIONS
DETECTOR
RS232
CABLE
57 58 59 60 61 62 63 64 65
66 67 68 69 70 71 72 73 74
SCREEN
AUX1
AUX2
TXD2B
RXD2B
TXD1
RXD1
RTS1
CTS1
YELLOW/RED
RED/BLACK
RED/BROWN
WHITE/RED
YELLOW/BLUE
WHITE/BLUE
BLUE/BLACK
ORANGE/BLUE
LINK 2 (NOTE 1)
USER COM1 AND COM2
(TERMINALS 58 TO 61 ARE
RESERVED FOR
FUTURE DEVELOPMENT)
DETECTOR HEAD
CABLE CONNECTIONS
NOTES
1)
2)
3)
LINK 2 MUST BE FITTED IF THE MODULE HARDWARE IS LESS THAN VERSION 62 (INTRODUCED 25/10/93) AND DOES NOT
INCLUDE REJECT CONFIRMATION.
METAL DETECTION RELAY CONTACTS - RL1. THE RELAY CONTACTS CHANGE FROM THE STATE SHOWN WHEN METAL
IS DETECTED
SYSTEM FAULT RELAY CONTACTS - RL2.(OPTIONAL). THE RELAY CONTACTS CHANGE FROM THE STATE SHOWN IF THE
REJECT CONFIRMATION UNIT SIGNALS A REJECT FAULT OR THE METAL DETECTOR SIGNALS A HEAD OR MODULE
FAULT.
Fig. 6A Layout of Components and Terminals for P/S Connection PCB issue - 6 and 7
Page 8
RATINGS
1)
RECOMMENDED POWER LEAD
2
AREA 0.75 mm
CONSTRUCTION 24 x 0.2 mm
CURRENT RATING 6 AMP.
COLOURS BROWN-LIVE, BLUE-NEUTRAL,
GREEN/YELLOW-EARTH.
2)
a) RECOMMENDED CIRCUIT BREAKER DOUBLE
POLE, CURRENT RATING 3 AMP OR 4 AMP,
TYPE C CIRCUIT BREAKER TO BE MOUNTED
CLOSE TO EQUIPMENT.
OR
b) RECOMMENDED FUSE RATING CURRENT RATING
4 AMP OR 5 AMP ANTI-SURGE (T).
Figure 6B Power Connections
Page 9
Figure 6C Cable Gland Assemblies for Power Supply Unit
Page 9A
Figure 7 Roller Shaft Insulation
(one end only)
Figure 8 Bearing Block Insulation
Page 9B
THIS PAGE IS LEFT BLANK INTENTIONALLY
Page 9C
Page 10
THE CONTROL PANEL
Introduction
on the LCD display but not altered.
The metal detector control panel (see Fig 11) is the
interface by which the user may observe and
control the metal detectors performance. All of the
metal detectors operating characteristics may be
programed through the control panel.
A Liquid Crystal Display ’LCD’ shows the information contained in the metal detectors computer, with
this display and by use of the touch keys the metal
detectors performance is controlled.
Certain keys on the panel are known as soft keys.
The function of these keys is controlled by the
computers software and changes dependent upon
the situation,
Changing the metal detection characteristics can
only be
achieved by gaining access to the metal detectors
computer. Access is restricted by the use of a four
digit pass code/access code. Different access
codes enable different levels of access. In this way
the control of particular parameters may be
restricted to certain personnel or user groups.
When installed on a product line many different
types of product may pass through the detection
head. To obtain optimum metal detection performance for each product the Safeline metal detector
may be programmed to memorise the required
setting for up to 21 different products. This is
particularly usefui with products such as soups,
meat, cheese etc, also metallized films.
The Safeline digital detector is a very sophisticated high performance but user friendly metal
detector.
With the help of the two colour bar graph display
the user may observe the signals generated by
metal contaminants or products passing through
the detector head.
During normal operation data may be observed
Liquid Crystal Display (LCD)
Detector Indicator
Bargraph Display
DETECT
Safeline
Soft Keys
Soft Keys
SAFELINE LTD., SALFORD, ENGLAND
Enter Key
PROG
ENTER
RECALL
EXIT
PROG/EXIT
Keys
Recall Key
Cursor Keys
Up/Down Keys
Page 11
OPERATING
AND ACCESS MODES
THE DISPLAY
AND TOUCH KEY FUNCTIONS
Running Mode
Liquid Crystal Display (LCD)
This represents the normal running display of
the metal detector. In this mode information
may be observed but the display values
cannot be changed.
Used to display the information in the metal
detector’s computer.
Bar Graph Display
Displays the level/amplitude of signals
generated in the detector head. If green the
signal is below the level required to trigger
the metal detector. When red the signal is in
excess of the level required to trigger the
output signal.
By pressing the RECALL key the user may
observe the following settings:
Serial No #4W# – Metal detector head serial
number.
M/C Model ### - The least significant digit
indicates the module stagger frequency.
The centre digit indicates the metal detector
head frequency.
Detect
A red LED indicates that the output has been
triggered.
The most significant digit indicates the metal
detector head memory size.
Prog/Exit
Used to enter or exit the metal detectors
com- puter programme
Ver #.## - Metal detector module Firmware
issue/version.
By pressing the ETC soft key the user may
observe the following settings:
Recall
Used to step back to the previous page in
the menu system (see using the page
display menu system)
Pack count ########
Reject count
####
Current time ##.##
Cursor Move Key
Next QA test ##.## - If selected
Used to control the movement of the cursor
when entering a digital value.
Operator Access Mode
The operator may change the following
parame- ters
Product Number (Prod No ##)
Up/down key
Used to increase or decrease a digital value.
Sensitivity settings (Sens4##)*
Enter
* Access may be full or limited set from the
engineers mode. If set to limited, sensitivity
cannot be adjusted.
Transfers data from the display and enters it
into the computers memory.
Soft keys
Controlled by the software the function of
these keys will vary dependent upon the
page display.
Page 12
THE PAGE DISPLAY SYSTEM
OPERATING
AND ACCESS MODES - Continued
There is a requirement to display more
informa- tion than the LCD can display at any
one time.
To expand the display capabilities a page
display menu system is used. This can be
compared to the pages of a book. When
there is more than one page of information to
be displayed an etc prompt will appear on
the display. Pressing the appropriate ’soft
key’ adjacent to ’etc’ will cause the display to
move to the next page or scroll forward. To
turn back to the previous page or scroll
backwards press the ’recall’ key. Using this
technique many pages of information can be
stored in the computers memory and
displayed as required.
Supervisor Access Mode
The supervisor may change the following
para- meters.
Product Number (Prod No##)
Sensitivity Setting (Sens ###)
Phase Setting (Phase ####)
Select Timer A B or C
Reset Reject Count
Reset Pack Count
QA Operator Access Mode
Allows Performance Checks to be carried
out.
On the display a small o pointer may appear
adjacent to the soft key. This indicates that
you may change a particular parameter. If
the pointer is not visible the parameter
cannot be changed.
QA Inspector Access Mode
Allows the Performance Validation Routine
(PVR) and the Local Printer Unit (LPU)
report informa- tion to be configured to the
users particular requirements. Used when
first installing the metal detector or making
changes to the set up characteristics.
If the parameter to be changed is a digital
value and the appropriate soft key is pressed
the pointer will now point inwards towards
the digital value to be adjusted and a cursor
bar appear under the digit to be changed.
Using the cursor move keys the digital value
may be changed. (See ’changing digital
values’ for further information)
Allows shift report and settings information to
be output to the LPU.
Allows Performance Checks to be carried
out.
If the parameter to be changed is not a
digital value but requires the user to make a
choice, ie ON or OFF, YES or NO the
selection will be indicated by a flashing
marker on the display.
Engineer Access Mode
Gives access to all variables and is used to
configure the metal detector to the users
particu- lar requirements. Used when first
installing the metal detector or making
changes to the set up characteristics.
Page 13
ENTERING THE ACCESS CODES
USING THE TOUCH KEYS
Cursor Move Key
All Safeline metal detectors are shipped from
the factory with the following access codes.
Code 0001 = Operator Access
This key is used to control the movement of
the cursor bar when changing the setting of a
digital value.
A small cursor bar will appear under the
active digit on the LCD display when a
parameter is available for adjustment
Example 1 2 3 4
one press of the cursor move cursor bar one
step to the left. this key and the Up/Down
adjustment of all the digits.
key will move the Combined use of keys will
enable.
Note:- This key will only operate when the
cursor bar is visible on the LCD display.
Code 0002 = Supervisor Access
Code 0003 = Engineer Access
Code 0004 = QA Inspector Access
These codes may be changed in the
Engineer’s access mode.
Please take care to memorise or
record your new access codes
Up/down keys
To enter the access codes use the following
procedure.
1) Press PROG/EXIT
Display reads 0000 note the cursor bar
under the left digit.
2) Press UP/DOWN keys and set to required
value.
3) Press ENTER 4) Repeat steps 2) and 3)
for each digit.
For security reasons the number changes to
a after each entry.
If a digit is entered in error the RECALL key
may be used to move back to the erroneous
digit.
When entering the security code a time of
sixty seconds is allowed between each key
operation,if this time period is exceeded the
programme will automatically return to the
running mode.
Similarly having entered the security code a
period of five minutes is allowed between
key ’operation before automatically reverting
back to the running mode.
Use of these keys will increase or decrease
the value of a particular digit.
Note:- This key will only operate when the
cursor bar is visible on the LCD display.
Prog/Exit
When operated in running mode will bring up
the ’ENTER SECURITY CODE’ display and
is the first step to gain access into the
programme. If operated whilst in any of the
access modes will exit the programme and
return to the running mode display.
Enter
Used to enter data into the computer
memory. For example when changing the
sensitivity on the display it is necessary to
press the ENTER key to memorise the new
vaIue.
Recall
Use this key to scroll backwards to the
previous display page on the LCD
NB:- The ETC soft key is used to scroll
forward.
Soft Keys
The function of the four soft keys is
controlled by software and will change
dependent upon where you are in the
programme.
Page 14
CHANGING DIGITAL VALUES
PROGRAMMABLE SETTINGS
Various settings in the progamme are stored
as digital values, eg product number,
sensitivity, phase etc.
Digital values can only be adjusted if a
pointer > is visible on the LCD display
adjacent to the parameter to be adjusted and
pointing toward the appropriate soft key.
General
Twenty one presettable programmes can be
stored in the computers memory. Each programme is identified by a product number.
For each programme the various settings are
entered or programmed in one of the three
access modes.
If a > pointer is not visible the value of that
parameter cannot be changed in that
particular programme.
Sensitivity (Sens # # #)
A digital value between 000 8 199, setting
000 represents the minimum setting but not
zero sensitivity.
To change the digital value of a particular
setting use the following procedure.
Phase (Phase # # # #)
1) Enter ACCESS code
A digital value between 0000 and 5788. 0000
represents zero degrees phase angle and
5788 represents 180 degrees.
2) Press appropriate soft key adjacent to
the parameter to be adjusted. The >
pointer will now point inwards towards
the parameter and a cursor bar appear
under the first digit of the number.
The zero setting represents the optimum
setting for the metal detector. At this setting
the detector will have the maximum immunity
to mechanical vibration and will give the best
detection sensitivity to stainless steel.
3) Press the Up/Down keys and adjust to
the required value.
NB:– Product Number 00 is preset to phase
value 0000 and cannot be adjusted.
Some products generate a ’Product Effect’
signal, by adjusting the phase setting these
unwanted signals can be minimised and the
overall detection performance improved.
4) Press cursor move key to move the
cursor bar to the next digit.
5) Repeat step 3)
Timer Selection
(Select timer A/B/C)
One of three preset reject timers A, B or C
can be allocated to a particular Prod No. In
most cases the same timer setting will be
applicable to all product numbers. With
certain reject Situations e.g. a photogated
pusher with highly variable pack length,
optimum rejection can only be achieved with
different timer settings.
6) Repeat step three and four for each digit
to set required value
7) Press enter key to store new value in
memory
NB;– Remember 1o keep a separate record
of product numbers and to which products
they apply,
The timer setting can only be changed in the
Engineers access mode. See section on
timers for further information.
Page 15
PROGRAMMABLE SETTlNGS –
continued
Inverse Detection (Inverse Detect Yes/No)
This feature allows the action of the reject
timer to be reversed, such that product
containing no metal contamination is rejected
whilst metal contaminated product is not
rejected.
This feature is often used to verify that a
product contains a metallic premium.
NB:– This feature can only be selected when
using a gated timer.
Power Drive (Power Drive # # #)
A digital value between 0 and up to a
maximum of 255 (this maximum value will
vary from head to head), which represents
the level of high frequency power being fed
into the coil system.
Power drive can be changed by the user in
Prod No. settings 18, 19, 20 only, this facility
is useful when a lower sensitivity than that
obtainable via the sensitivity control is
required.
On product setting 0 to 17 the power level is
fixed at the time of manufacture and is not
adjustable.
Page 16
CONFIGURING THE DETECTOR
Various operating characteristics of the detector are
programmable and may be altered or configured to
suit the particular requirements of the application.
The configuration process should be performed by
the engineer when first installing the detector.
DETECTOR SPEED
Hi/Lo - select to suit product throughput speed. See
specification for speed range. Will normally be set
to Lo for most conveyor applications and Hi for free
fall applications.
From the Engineers mode the following are
alterable:
RE JECT INHIBIT
Yes/No - when selected will override operation of
reject device. Useful during setting up operations.
Select No for normal operation, if left in Yes
condition will cause bar graph display to flash.
For maintenance work remove the supply to the
reject mechanism, do not rely on the software
inhibit.
SELECT AND UPDATE TIMER
See ’Reject Timers’ section in manual.
ADJUST REFERENCE PHASE
Factory set to give best vibration immunity of the
detector and should not normally require
adjustment.
The setting should align phase 0000 to the vibration
signal.
If the setting requires re-alignment adjust the
reference phase in a similar manner as adjusting
phase discrimination to minimise product effect
(see section ’programming the detector’).
Create a vibration signal by striking/hitting the
detector, use the sensitivity adjustment to give a
signal of suitable amplitude.
The phase of ferrite material (not ferrous) is very
similar to vibration and may be used as an
alternative to striking the detector to produce a
reference signal.
OPERATOR ACCESS
Full/Limited - if limited prevents adjustment of
sensitivity in Operator mode.
REJECT CONFIRMATION
Yes/No - the reject confirmation unit is an optional
board which fits into the power supply unit. Select
Yes when the board is fitted.
REJECT CONFIRMATION EXTENSION TIME
See ’Reject Confirmation Unit Instruction Manual’
for details.
BOOST MODE
Yes/No - when selected will give approximately 20%
sensitivity improvement at full sensitivity.
LANGUAGE
Select one of six languages (including English).
The parameters under ’Configuring The Detector’
remain in English.
Firmware version 2.10 (and greater) has eight
languages and has all displays and printouts
translated.
Firmware version 2.21 (and greater) has nine
languages
DETECTION BUZZER
SET DATE - Firmware 2.21 or less
On/Off - an internal alarm buzzer will sound when
metal is detected if set to On.
Allows the setting of YEAR, MONTH and DAY.
Refer to ’Changing Digital Values’ for adjustment.
CHANGE MODE
Operator / Supervisor / Engineer / QA Inspector
access code may be changed as required.
Page 17
SET TIME - Firmware 2.21 or less
Allows the setting of HOUR and MINUTE. The
clock uses the 24 hour format. Refer to ’Changing
Digital Values’ for adjustment.
PRINTER HANDSHAKE - Firmware 2.10 or greater
HW/SW controls the handshaking mode the Module
uses with Local Printer Unit (LPU).
If software (SW) handshake is selected the Module
uses X-ON and X-OFF flow control.
Normally set to hardware (HW) handshake.
To programme any of the above facilities enter the
Engineer Access code and press the ’ETC’ key until
the required parameter is displayed by using the
’ETC’ and ’RECALL’ keys the Engineer may scroll
backwards and forwards through the various pages
of the programme. When completed press
Prog/Exit key to return to running mode.
Page 18
REJECT TIMERS – GENERAL
TlMER TYPES
A wide range of timer types and settings are
available to the engineer. Five different timer types,
each with variable settings can be pro- grammed
for use within the metal detector.
The types are as follows:
the reject solenoid, and the reject mechanism may
need to be taken into account.
RECOMMENDED APPLICATIONS
Listed below are various types of reject
mechanisms encountered in detection applications
with recommended timer types for fixed speed
applications. For variabIe speed applications use
tm3[G] tor tm2[G].
tm1
Simple reject timer without delay time Variable
reject time, range 50 millisec. to 60 sec
REJECT ACTION
TIMER TYPE
tm2(G)
Timed Audible Alarm
tm1
tm2
tm2(G)
Delayed reject timer for fixed speed applications
Variable reject time, range 50millisec. to 60 sec
Variable delay time, range 50 millisec. to 60 sec, it
may also be set to zero.
Conveyor Stop
X
-
-
Gravity Fall Systems
X
-
-
Instant Reject with
X
-
-
Retracting Band
-
X
-
Air Blast
-
X
XX
Photogated and non-gated modes.
Timed Reject Period.
tm3(G)
A delayed reject timer for variable speed applications. Requires external sensor to monitor speed
Variable signal shift, range 0 to 128
Punch/P usher
-
-
X
Variable reject shift / time, range 3 to 256 /
50millisec. to 60 sec.
Drop/lift Flap
-
X
XX
Photogated and non-gated modes.
Plough action diverter
-
X
X
Timers tm2 8 tm3 may be photogated, however an
external photo sensor is required to sense the
position of the product/pack when used in the
photo-gated mode.
Flip action diverter
-
-
XX
Photogated reject timers provide very precise and
effective reject operations. For example, if an air
blast reject is used to reject boxed product,
photogating ensures that the air blast hits the pack
in the same position every time. Without
photogating the air blast operation would be
dependent upon the position of the metal
contaminant in the pack and hence be more
variable in operation.
Timer Selection A, B or C
NOTE: At high product throughput rates the
responce time of the reject relay (typically 15ms),
timer settings may then be selected as required.
Both timer selection and setting may be made in the
engineers mode but only timer selection may be achieved
from the supervisor mode.
XX = preferred type, X = OK, - = not applicable
The engineer may allocate different timer types and
settings to position A, B or C, only three selections
are allowed. In general only one timer type and
setting will be required for most applications.
For applications with a greater than +/- 25%
variations in pack length or for those operating at
different fixed speeds it may be beneficial to have
different timer settings for A, B and C. The different
Page 19
tm1 – TIMER
6) Enter required value
The tm1 reject timer is useful for applications
requiring instantaneous reject action with zero
delay time. Typical applications would be gravity fall
reject mechanism or simple stop alarm conveyor
system.
7) Press enter twice: display reads:
Timer A,B,C
Type tm1 SET/UPDATED
for five seconds and then returns to main menu
Sample Size
Small size metal contaminants should be used to
set the timer, the use of large contaminants will
produce errors in the settings. Try to use the
smallest metal sample that can be detected. If this
is not possible use the smallest sample available
and adjust the sensitivity so that the sample gives
an indication of 2 to 3 red bars on the bar graph
display.
Setting Timer type tm1
At this stage the user should be familiar with use of
the control panel and adjusting digital values.
Setting the timer can only be achieved from the
Engineers Mode.
8) Test operation of the reject device to check
tm 1setting is correct.
If no further adjustment is required press Pro Exit
and return to running mode.
Notes:a) The reject time is automatically extended in
relation to the size of the metal detected, ie the
smaller the piece the shorter the time. b) If two or
more metal pieces pass through the detector within
the set reject time, the reject time is automatically
extended to ensure rejection of; pieces.
To programme the timer setting:
1) Enter the Engineer Access Code
2) Press ’ETC’ key: display reads:
Select Timer ABC
3) Select type A, B or C: display reads:
Timer ’x’ Update Yes / No
Note:- ’x’ represents the selected timer A, B or C
4) Select YES: display reads:
Timer Type tm3(G),tm2(G),tm1.
5) Select tm1: display reads:
tm1 Reject Time #### sec
Page 20
tm2[G] TIMER – NON GATED MODE
The tm2[G] timer used in the non-gated mode is an ideal
delayed reject timer for use with loose product where the
reject device is a reasonable distance from the detector
head. It can also be used with individual products where
precise reject operation is not crucial. When setting up
the timer there are some basic rules that must be applied.
device to reject contaminated product. The mini- mum
value will be the operate time of the reject device.
Setting Up Timer Type tm2(G)
To set up the timer use the following procedure:
1)
If inspecting individual products prepare a sample
pack containing a small metal contaminant
positioned at the rear/trailing edge.
2)
Enter the Engineers access code.
3)
if inspecting individual products pass the sample
pack containing the small metal contamination
through the detector and adjust the sensitivity so that
the bar graph indicates 2 to 3 red bars.
Sample Size
Small size metal contaminants should be used to set the
timer, the use of large contaminants will produce errors in
the settings. Try to use the smallest metal sample that
can be detected. If this is not possible use the smallest
sample available and adjust the sensitivity so that the
sample gives an indication at 2 to 3 red bars on the bar
graph display.
Product Presentation
Sample product or packs used to set up the timer should
be passed through the detector at their normal speed
without skewing or slippage.
If product is loose place metal sample on belt and adjust
sensitivity in a similar manner.
4)
Press ’Etc’ soft key, the display reads: Select timer A
/B/ C
5)
Select timer A, 8 or C display now reads:
Product Length
Where a variety of individual products with differing
lengths are being inspected ensure that for a particular
timer setting the variation in pack length does not exceed
+/- 25% of the pack length used to set up the timer.
Timer ’x’ Update Yes / No
Note:- ’x’represents the selected timer A, B or C
Three different timer settings are available, ie A, B, and C
to accommodate variations in pack length.
6)
Select ’Yes’ display now reads: Timer type tm1 /
tm2(G) / tm3(G)
Select ’tm2(G)’, it previously set to gated mode
display will read
Delay Time
7)
Delay time is the time taken for a metal contaminant to
travel from the metal detector to the reject device.
Gated Timer Still Required Yes / No
Reject Time
Reject time is the time required by the reject
if not set previously to gated mode, display will be as
shown in 8)
Page 21
8)
Select ’No’, display now reads:
Signal Delay # # # #sec
Reject Time # # # #sec
tests using larger metal samples.
If product is loose test reject operation using large and
small samples, also check using two metal samples
spaced at different distances apart on belt.
If for any reason the settings at the timer are thought to
be incorrect repeat the whole of the setting up procedure
from step 1
9) If inspecting individual product place the sample
pack with metal contaminant in the rear/trailing edge
(must be correct size sample) on conveyor belt and allow
it to pass through the detector without skewing or
slippage.
Press the ’Signal Delay’ soft key and adjust the Signal
Delay Time so that the reject mechanism operates just as
the front/leading edge of the pack reaches the reject
device.
If product is loose place metal sample on belt and allow it
to pass through the detector in a similar manner.
However, adjust the Signal Delay Time so that the reject
mechanism just begins to operate as the metal sample
reaches it.
10) Now position the metal contaminant at the
front/leading edge of the individual pack, pass the pack
along the conveyor and through the detector as before.
Press the ’Reject Time’ soft key and adjust the Reject
Time until the metal contaminated pack is rejected
accurately and consistently.
If the product is loose adjust the Reject Time so that
metal sample is consistently rejected with the minimum of
wasted product.
Press the ’Enter’ key to store the settings in memory.
11) Press ’Enter’ key again, display now reads:
tm2(G) Gated Yes/No
12) Select No, display now reads
Timer ’A/B/C’ Type tm2 Set/Updated
for five seconds and then returns to the main
menu.
13) For individual products further check the operation of
the reject mechanism by passing contaminated packs
through the detector. Check packs with small metal
samples placed first at the front and then at the rear of
the pack. Repeat the
Page 22
tm2[G] TIMER – GATED MODE
Sync Delay
The tm2(G) photogated reject timer gives precise
operation of the reject device where individual products,
eg cartoned products, individual chocolate bars etc are
transported on a conveyor. Photogating ensures that the
reject operation is independent of the position of metal
contamination within the product.
Sync delay is the time taken for the pack to travel from
the photo beam to the optimum reject position.
Delay Time
Delay time is the time taken for a pack with a metal
contaminant in its rear/trailing edge to travel from the
metal detector and have its front/leading edge line up
with the centre of the reject device as it operates.
When setting up the timer there are some basic
rules that must be applied.
Sample Size
Reject Time
Small size metal contaminants should be used to
set the timer. The use of larger contaminants will produce
errors in the settings. Try to use the smallest metal
sample that can be detected. If this is not possible use
the smallest sample available and adjust the sensitivity
so that the sample gives an indication of 2 or 3 red bars
on the bar graph display.
Reject time is the time required by the reject device to
reject a pack. The minimum value will be the operate time
of the reject device.
Selecting Photo-Electric Devices
Use a two part photo electric device, ie with separate
transmitter and receiver or with combined transmitter and
receiver and reflector. Avoid the use of photo electrics
that require the pack itself to reflect the beam.
Product Presentation
Sample product or packs used to set up the timer
should be passed through the detector at their normal
speed and without skewing or slippage.
Preferred types are infra red with a maximum current
demand of 30 milliamps. Other types may be used,
however, if they exceed the current limitations an
additional power supply will be required.
Product Length
Where a variety of individual products with different
lengths are being inspected ensure that for a particular
timer setting .the variation in pack length does not exceed
+/- 25% of the pack length used to set up the timer. Three
different timer settings are available, ie A, B, or C to
accommodate variations in pack length.
Light energised or dark energised systems may be used.
The metal detector will set itself automatically and
accommodate either mode during the calibration (CAL)
procedure.
The output device should normally be NPN open
collector, min voltage 15V, min current 10 milliamps. PNP
output devices can be accommodated by changing the
internal link arrangement in the detector head.
Window Time
Positioning the Photo-Sensors
Window time is the time period equal to 2 times the pack
length at normal conveyor speed. This time setting is
derived automatically in the set up process.
Position the photobeam on the conveyor at right angles
to flow of product along the conveyor
Page 23
such that the pack/product breaks the beam before
reaching the reject device. The beam may be positioned
either side of the detector. Ensure the sensors do not
effect the operation of the metal detector itself by
infringing the metal free zone limitations.
At line speeds of 61m/min (200ft/min) or greater the
sensors must not be positioned too close to the reject
device, ensure a minimum distance of 0.5m (1.5ft).
Adjust the height and alignment of the sensors so that all
packs break the beam at the same leading edge position
irrespective of the type or size of pack.
6) Select ’Yes’ display now reads
Timer type tm1/tm2(G)/tm3(G
7) Select ’tm2(G)’ if previously set to gated mode
display will read
Gated Timer Still Required Yes/No
If not set previously to gated mode, display will be as
shown in 8)
8) Select ’No’, display now reads:
Signal Delay # # # #sec
Electrical Connections (Photo-Sensors)
Electrical connections from the sensor should be
connected to the metal detector power supply
unit.
See ’Power Unit Electrical Connections’ in the Installation
section. Connect the sensor to the terminals labelled
Pack Sensor.
Setting Up Timer Type tm2fG] in Gated Mode
To set up the timer use the following procedure:
1) Prepare a sample pack containing a small metal
contaminant positioned at the rear/trailing edge
2) Enter the Engineers access code
Press the ’Enter’ key to store the settings in memory.
3) Pass the sample pack containing the small metal
contamination through the detector and adjust the
sensitivity so that the bar graph indicates 2
to 3 red bars
Reject Time # # # #sec
8) Place the sample pack with metal contaminant in
the rear/trailing edge (must be correct size sample) on
conveyor belt and allow it to pass through the detector
without skewing or slippage.
Press the ’signal delay’ soft key and adjust the signal
delay time so that the reject mechanism operates just as
the front/leading edge of the pack reaches the centre of
the reject device.
10) Pass the pack along the conveyor, and through the
detector as before.
Press the ’Reject Time’ soft key and adjust the reject time
so the reject device responds in a way which would reject
the pack if it were positioned correctly. We are not
attempting to reject the pack at this stage.
11) Press ’Enter’ key again, display now reads Tm2(G)
Gated Yes/No
12) Select ’Yes’ display now reads
Sync Delay # # # #sec
4) Press ’ETC’ soft key the display reads.
Window Time ####sec
Select Timer A/B/C
Etc
5) Select timer A B or C, display now reads
Timer ’x’ Update Yes / No
Note:– ’x’represents the selected timer A, 8 or C
NOTE:a) Always set the window time first.
Page 24
b) A metal test piece is not required to set these
two parameters
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.
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.
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.
14) Repeat step 13 two or three times to check that
window time setting is repeatable,
18) Further check the operation and settings of the
reject mechanism by passing contaminated packs
through the detector.
NOTE:-
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.
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.
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.
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
Page 25
tm3[G] TIMER
The tm3[G] is a variable speed version of the tm2[G)
timer,
Setting Up Timer Type tm3[G] – Non Gated
Mode
The tm2[G] timer has four time clock controlled functions
that will provide an accurate reject action on a fixed
speed conveyor.
To set up the timer use the following procedure:
The tm3[G] timer has three of these functions controlled
by a speed sensor attached to the conveyor, which
enables an accurate ”reject action to be maintained over
a wide range of speeds.
The speed sensor provides a number of digital pulses in
relation to the distance moved by the conveyor. The
incremental distance moved between pulses is known as
the SHIFT distance.
Customers fitting/producing their own speed sensor
should refer to Appendix A.
Setting Up Timer
Before making any adjustments the following points a)
through to c) should be noted, and to ensure accurate
rejection of alI sizes of metal contamination in any
position within the pack these procedures must be
rigorously applied.
1) If inspecting individual products prepare a
sample pack containing a small metal contaminant
positioned at the rear/trailing edge.
If product is loose use smallest detectable metal test
sample available.
2)
3) If inspecting individual products pass the
sample pack containing the small metal contamination
through the detector and adjust the sensitivity so that the
bar graph indicates 2 to 3 red bars.
If product is loose place metal sample on belt and adjust
sensitivity in a similar manner.
4)
Press ’ETC’ soft key and display reads Select Timer
A/B/C
5)
Select timer A B or C, display now reads Timer ’x’
Update Yes/No Note: ’x’ represents the selected
timer A B or C
6)
Select ’Yes’ display now reads Timer Type
tm1/tm2(G)/tm3(G)
7)
Select ’tm3(G)’ if previously set to gated mode
display will read
a) The same small metal test piece should be used to
make the following settings.
For loose product it can be placed on the belt, for
packaged products it is convenient to position the metal
test piece always on top of the pack at the front or rear
edge and pass it down the centre line of the conveyor.
b) The sensitivity should be adjusted such that the
metal test piece is only just detected, i.e. 2 or 3 red bars
illuminated on the bar graph display.
Enter the Engineers access code
Gated Timer Still Required Yes/No
If not set previously, display will be as shown in 8)
c) The metal test piece has to pass through the
aperture along the same axis for every test, i.e. the same
distance from the top of the aperture or nearest surface
of the detectors aperture.
Page 26
8)
Select ’No’ display now reads
Setting Up Timer Type tm3[G] – Gated Mode
Signal Shift # # #
To set up the timer use the following procedure:
Reject Shift # # #
1)
Prepare a sample pack containing a small metal
contaminant positioned at the rear/trailing edge.
9)
2)
Enter the Engineers access code
For loose product use the smallest metal test piece
positioned on the belt, for packaged products use the
smallest metal test piece positioned at the rear/trailing
edge of the pack.
3)
Pass the sample pack containing the small metal
contamination through the detector and adjust the
sensitivity so that the bar graph indicates 2 to 3 red
bars.
Press the key adjacent to Signal Shift and adjust the shift
setting using the up/down and cursor keys such that the
reject operates just. before
4)
Press ’ETC’ soft key and display reads Select Timer
A/B/C
On loose product the metal reaches the reject device.
5)
Select timer A B or C, display now reads Timer ’x’
Update Yes/No Note: ’x’ represents the selected
timer A B or C
6)
Select ’Yes’ display now reads Timer Type
tm1/tm2(G)/tm3(G)
7)
Select ’tm3(G)’ if previously set to gated mode
display will read
To set signal shift set the conveyor to its mid-range
speed.
On Packaged product – the front/leading edge of the
pack reaches the reject device.
When set - press ENTER once
10) To set reject shift, for loose product use the smallest
metal test piece positioned on the belt, for packaged
products use the smallest metal test piece positioned at
the front/leading edge of the pack.
Press the key adjacent to Reject Shift and using the
up/down and cursor keys adjust the reject time until the
metal test piece is accurately rejected.
When set – press ENTER key once
Gated Timer Still Required Yes/No If not set previously,
display will be as shown in 8)
8)
Select ’No’ display now reads Signal Shift ### Reject
Shift ###
9)
To set signal shift set the conveyor to its mid-range
speed.
If no further adjustments are required press ENTER
again. The display will change showing the type of timer
and asking the question
tm3 Gated? Yes /No
No – completes the programming and will display the
type ot timer – ’Set/Updated’ for a period of five seconds
after which it returns to the main menu.
Place the sample pack with the smallest metal test piece
positioned at the rear/trailing edge of the pack on the
conveyor belt and allow it to pass through the detector
without skewing or slippage.
Press the key adjacent to Signal Shift and adjust the shift
setting using the up/down and cursor
Page 27
keys such that the reject mechanism operates just
as the front/leading edge of the pack reaches the
centre of the reject device.
When set – press ENTER once
10) The reject shift will be adjusted as the last
operation so do not worry at this stage about the
reject mechanism operation.
Shows CAL for 5 seconds after which ‘RUN’
Appears.
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 shift based on the
length of the pack.
If no further adjustment is required press ENTER
again. The display will change showing the type of
timer and asking the question
The window shift can be measured several times to
assess the effects of skewing of the pack simply by
repeating the above procedure.
tm3 Gated? Yes /No
NOTE:–
10) Select ’Yes’ displays reads
a) CAL is calibrating the photo sensor so that
either a light energised or a dark energised sensor
can be used.
tm3G Sync Shift ###
ETC Window Shift ##4
b) Ensure that during the CAL period there are no
inadvertent interruptions of the photo-beam.
NOTE:–
a) Always set the window shift first.
b) A metal test piece is not required to set these
two parameters.
c) The position on the conveyor of the photogate
sensor should always precede the reject mechanism. Ensure the sensors do not effect the operation
of the metal detector itself by infringing the
metalfree zone limitations.
At line speeds of 61m/min (200ft/min) or greater,
the sensors must not be positioned too close to the
reject device, ensure a minimum distance of 0.5m
(1.5ft).
Adjust the height and alignment of the sensors
so that all packs break the beam at the same
leading edge position irrespective of the type or
size of pack.
d) When the Gated option is selected the Reject
Shift is changed from being controlled by the speed
sensor to being controlled by the internal time clock
with units in seconds. A pre-set time setting of
100ms is the initial setting of the Reject Time and
this should be sufficient to allow the Window Shift
and the Sync Shift to be set first, before trimming
the ’Reject Time’.
c) The detector head is always pre-set to operate
with a NPN photo-sensor but it can be switched
(internally) to operate from a PNP photo-sensor.
Both photo-sensor and speed sensor must be the
same output type, NPN or PNP.
d) The Window Shift 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.
e) The window shift is automatically extended for
large pieces of metal contamination or for more
than one piece of metal contamination.
13) To set Sync Shift
Sync Shift is the distance measured in shift pulses
from the front edge of the pack interrupting the
photo-beam to the pack being in its optimum reject
position.
Press the key adjacent to ’Sync Shift’.
Pass the correct size of pack along the conveyor.
Both the detection light and the buzzer are
operated continuously during this procedure, and all
packs will now operate the reject mechanism even
without having a metal test piece.
12) To set ’Window Shift’
Press key adjacent to ’Window Shift’.Display
Adjust the Sync Shift setting until the pack is
accurately rejected.
Page 28
When a satisfactory setting has been achieved. Press
ENTER once.
The Reject Time should now be adjusted.
14) Press the ’Etc’ soft key the display now reads Signal
Shift 4## 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 Shift’ soft key and adjust the reject time
until the metal contaminated pack is cleanly rejected.
When accurate reject action has been achieved
Press ENTER once.
Using the ETC key will toddle the display between the
two pages to allow for any trimming to be done before
finally entering the data into memory.
When satisfactory settings have been achieved
Press ENTER once again.
The display will show the type of timer Set/ Updated for a
period of five seconds after which it returns to the main
menu.
15) 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 are thought to
be incorrect repeat the whole of the setting up procedure
from step 1.
Page 29
PROGRAMING THE DETECTOR
GENERAL
At this stage the metal detector should have been installed
and configured and the user be familiar with the basic
operation of the control panel as described in previous
sections.
The Safeline detector has the ability to store settings for 21
different product numbers. Each product number represents
a group of settings, the appropriate setting of sensitivity,
phase, timer type and inverse detection may be allocated to
each product number.
Sensitivity and phase when set correctly will optimise the
detection sensitivity while selection of timer type will
optimise reject operation, for different pack lengths or
speeds. Inverse detection will allow the action of the reject
timer, in the selected product number, to be reversed.
For most products the optimum setting of the detector will
be with phase 0000. With products exhibiting a product
effect improved detection sensitivity may be achieved by
aligning the phase discriminator to the product signal.
To decide which of the two set up conditions give the best
sensitivity it will be necessary to set up the detector first with
phase 0000, and then, with phase aligned to the product
effect. Comparison should be made between the two results
and the most favourable setting selected.
Before making an adjustment to the detector ensure that
product is continually moving through the detector aperture
in its usual manner.
NB:– The detector will not operate correctly with product
stationary in the aperture.
Worst case, product effect condition, ie. greatest
disturbance of the coil system/largest product signal is
experienced when the coil system condition changes from
no product to maximum product. This is because the
detector senses the changes in the amount of product in the
detector.
lf the product is in a continuous strip a large product signal
may be experienced from the leading face followed by a
much reduced signal as the product fills the detector.
With boxed/cartoned product the worst case
Page 30
condition occurs as the box enters and leaves the detector.
The gaps between the boxes will create the worst case
product effect condition. If the boxes are touching a reduced
product signal will result.
NON PRODUCT EFFECT APPLlCATIONS
If when set at phase 0000 and sensitivity at maximum there
is no product signal visible on the LED bar graph, as will be
the case with most dry products. Adjustment of the detector
is simply a case of adjusting the sensitivity to give the
required detection standard, ie 1.0, 1.5, 2 Fe etc. To do this
use the following procedure:–
1)
Ensure product is flowing thorough detector in normal
manner.
2)
Enter Supervisor/Engineer Access Code.
3)
Select appropriate product number.
4)
Manually set phase to 0000.
5)
Adjust sensitivity and check detection level with metal
sample passing through detector.
6)
Press ’Enter’ to enter new values in memory.
signal of 2 to 3 green segments on the bar graph
display.
PRODUCT EFFECT APPLICATIONS
6) Test the detection sensitivity with metal samples.
Wet/moist product, ie meat, cheese, soups etc
generate product signals when passed through the
detector. At setting Phase 0000 the signal will be
clearly visible on the LED Bar graph display.
Minimising Product Effect Signal By Manually
Adjusting The Phase Discriminator.
With this type of product there are two alternative
settings for the detector. Without phase discrimination
(ie phase 0000) and with phase discrimination, ie
phase aligned to the product.
The most favourable condition is ascertained by
setting the detector to both conditions and comparing
the results.
The objective of the following procedure is to
ascertain the setting of phase which will align the
phase discriminator with the product signal. The
correct setting will give minimum signal from the
product on the bar graph display.
There will be one value of phase which will give
minimum signal, this is known as the null point
Before adjusting the detector ensure that the product
is passing through the detector in its normal manner.
Note:– the product should be continually moving, the
detector will not operate with standing/stationary
product in the aperture.
If the product is a continuous length/strip, the worst
case product effect is given from the leading
edge/face of the product. Product fully spanning the
detector head gives a much reduced signal.
Vibration
Ferrous
Product Signal
Non -
For the purpose of setting up the detector it is usual to
use the worst case product effect conditions. This will
necessitate setting up to the leading edge/face signal.
Similar circumstances exist with individual or cartoned
products. The worst case product effect occurs when
the detection senses the change from full product to
no product, ie the gap between products.
Ferrou s
Stainless
Steels
It is recommended that the detector is set up initially
to worst case product effect conditions. With
experience it may prove possible to increase the
sensitivity setting without having to re-adjust the
phase setting.
0000
3000
0000
PHASE VALUE
Minimising Product Effect Signal without the Use
of Phase Discrimination
setting. Changing the phase setting up or down in
value from this setting will increase the amplitude of
the signal.
1) Ensure product is flowing through the detector,
creating worst case product effect condition”.
it is much easier to find the correct phase setting by
starting at a low sensitivity setting then repeating the
process in stages at increased sensitivity.
2) Enter the access code.
3) Select appropriate product number (00 to 20).
4) Manually set phase to 0000, (NB product No 00 is
preset to phase 0000 and cannot be altered).
5) Observe the bar graph display and adjust the
sensitivity such that the product gives a maximum
When using phase discrimination to minimise product
signals the detector will become more susceptible to
vibration. The final setting of sensitivity may be limited
by vibration effects rather than product effect.
1) Ensure product is flowing through the detector
creating worst case product effect conditions.
Page 31
2) Enter access code.
phase setting up and down until minimum signal ie. the
null point is found.
3) Select lowest available product number (01 to 20).
11) The phase discriminator is now aligned to the
product signal, next adjust the sensitivity so that the product
signal gives a maximum signal of 2 to 3 green bars on the
bar graph display.
4) Manually set phase to 0000.
5) Adjust sensitivity so that the peak signal from the
product gives just less than full scale indication on the LED
bar graph display. If the signal is very large, such that zero
sensitivity does not reduce the product signal to less than
full scale indication on the LED bar graph, it may be
necessary to reduce the power level (see Power Drive in
’Programmable Settings’).
12) Check the susceptibility of the detector to vibration
if unacceptable reduce the sensitivity until acceptable.
13) Press the ’Enter’ key to store the new settings in
memory.
6) To find the null point, change the phase setting to
0500 and observe if amplitude of product signal indicated on
the bar graph display reduces. Repeat the process
increasing the phase setting in steps of 0500, ie 1000, 1500,
2000, 2500, 3000 etc, until the null point is located.
Lets say for example as we increased the setting there is a
clear reduction in signal as we change from 2500 to 3000,
then from 3000 to 350Q the signal starts to increase again.
This indicates that the null point is between 2500 and 3500.
7) Now reduce phase setting in steps of hundreds ie
3500, 3400, 3300, 3200, etc. the product signal indicated on
the bargraph display should now reduce in amplitude.
Decrease the phase setting in steps of hundreds until the
product effect signal is reduced to a minimum and then just
starts to increase again.
8) At this stage the product effect signal indicated on
the bar graph display should be quite small. To obtain
a more precise phase setting increase the sensitivity setting
to give a larger signal indication on the bar
graph display.
9) Now use the ’tenth digit’ and increase the setting, ie.
3010, 3020, 303Q, 3040, 3050, etc. until the product effect
signal is reduced to a minimum and then just starts to
increase again. Using the tenths digit adjust the phase
setting up and down until minimum signal ie. the null point is
found.
10) Although not always necessary an even more
precise null point will ( be found by now using the ’units
digit” in a similar manner to the tenths digit as described in
9). Using the units digit adjust the
14) Test the sensitivity of the detector by passing metal
samples through the aperture of the detector (preferably on
or in the product) and note the results.
Minimising Product Effect Signal By Using The
Automatic Setup Facility
Using the auto-setup feature the system will automatically
setup the phase and sensitivity to a product passed through
the detector.
The product will need to be passed through the detector at
least two times during auto-setup and at worst (under large
product signal applications) up to five times.
The system cannot be used to setup automatically on a
continually running product line.
The auto-setup will work successfully with any packaged or
loose product which exhibits a product signal.
For example minimum product effect signal may have
occurred at 3100 and starts to increase again at 3000.
For product effect applications where the product flow is
continuous, such as that found on pipe line systems, manual
phase adjustment must be used. See ’Minimising Product
Effect Signal By Manually Adjusting The Phase
Discriminator’
1) Ensure no product is passing through the detector.
2)
Select a sample product which will create a worst case
product effect condition.
3)
Enter access code.
4)
4) Select lowest available product number (01 to 20).
5) Select phase.
6) Select automatic – from this point the auto-setup routine
will guide you through each step. Simply follow the
displayed instructions.
Page 32
7) When asked to pass product through aperture
ensure the product is passed in the same orientation
and position each time.
8) When the auto-setup routine has finished it will
display the message ”Product adjustment completed’. The
phase and sensitivity have now been set passing the
product through the aperture should now give 2 to 3
segments on the bar graph display.
NOTE – If the message ’WARNING the phase setting may
be in error appears it may be necessary to trim the phase
and possibly the sensitivity manually (see ’Minimising
Product Effect Signal By Manually Adjusting The Phase
Discriminator’).
9)Test the sensitivity of the detector by passing metal
samples through the aperture of the detector (preferably on
or in the product) and note the results.
SELECTING INVERSE DETECTION
The action of the reject timer can be reversed such that
product containing no metal contamination is rejected whilst
metal contaminated product is not rejected.
This feature is often used to verify that a product contains a
metallic premium.
This option is only selectable in the engineers mode.
To select inverse detection:
1)
2) Press ’ETC’ key until the inverse detection page
is displayed
3)
SELECTING TIMER A B or C
The timer setting A B or C controls the operation of the
reject device. There are three different timer settings
available however for most applications only one timer
setting will be required.
Possible circumstances which may necessitate different
timer settings are as follows.1) Photogated punch/push reject device with a wide
variation in pack length. Adjusting the timing will ensure the
pusher hits the pack in the most effective position.
2)
a)
This option can only be selected if the current timer is
gated (i.e. a tm2G or tm3G).
b)
A gated timer can not have its parameters changed if
this option is selected. Inverse detection must be
deselected prior to adjustments.
If the user attempts either a) or b) above, the system
prevents its implementation and displays the required action
on the LCD display, i.e. in the case of note a) – ”Timer must
be gated for this option’.
The settings of timers A B and C are set by the Engineer
when the detector is configured.
At this stage the objective is to allocate a previously set
timer to a particular product number as advised by the
Engineer.
Enter the supervisor or Engineers Access code
2)
Press ’ETC’ key
Press the soft key adjacent to YES 4) Press ’Prog/Exit’
key and exit programme.
NOTE:-
Applications running at different conveyor speed that
necessitate different reject timer setting.
1)
Enter the Engineers Access code
3) The display asks for a selection A B or C. Select the
appropriate timer setting as advised by engineer.
4) Press ’Prog/Exit’ key and exit programme.
Page 33
PERFORMANCE VALIDATION ROUTINE
General
Accessing The PVR
The performance validation routine (PVR) helps
users comply with ISO 9000 and BS5750 by
ensuring that the metal detector system is tested
and operating to the users specified quality
assurance (QA) standards of performance.
All Safeline metal detectors are shipped from the
factory with the following PVR access codes
Code 0004 = QA Inspector Access
Code 1000 = QA Operator 1 Access
The quality standards of may user companies
require the metal detector and its reject system to
be manually tested at specified intervals by
authorised QA personnel to validate compliance.
Code 2000 = QA Operator 2 Access
Code 3000 = QA Operator 3 Access
–
QA personnel may programme the detector to
indicate when testing is required and to give an
alarm if testing is not carried out at the appropriate
time. Individual QA personnel may be allocated a
private access code to the metal detector ensuring
that the individual charged with testing the metal
detector does so at the specified time.
ETC through to –
Code 9000 = QA Operator 9 Access
CONFIGURING THE PVR
Local Printer Unit (Optional)
Although effective as a stand alone function the
PVR is most effective when used in conjunction
with a local printer unit (LPU), the printer will
provide a date and time stamped hard copy print
out showing when the metal detector was tested
and by whom.
Various operating characteristics of the PVR are
programmable and may be altered or configured to
suit the particular requirements of the application.
The configuration process should be performed by
the QA Inspector when first installing the metal
detector or making changes to the setup
characteristics.
The hard copy print out can be used to demonstrate
authorised personnel’s compliance with company
standards and hence the user companies
compliance with the agreed quality standard. This
may prove invaluable to companies wishing to
demonstrate compliance with the ISO 9000,
BS5750, the UK Food Act, and for users supplying
the major retail organisations with strict metal
detector standards.
On entering the QA inspector mode select QA
SETUP to gain access and allow alteration of the
following settings:
The LPU also records general information relating
to the metal detector performance, it will date and
time stamp events such as rejections and changes
made to the metal detector settings. The LPU is a
very useful management tool for recording events
that effect detector performance.
Allows the setting of HOUR and MINUTE. The
clock uses the 24 hour format. Refer to ’Changing
Digital Values’ for adjustment.
Set Date - Firmware 2.22 or qreater
Allows the. setting of YEAR, MONTH and DAY. I
Refer to ’Changing Digital Values’ for adjustment.
Set Time - Firmware 2.22 or qreater
Line Identification (Line ID. # # # #)
A line identification number can be entered.
The customer may use their own LPU (providing
the module firmware is 2.10 or greater) or purchase
a Safeline LPU.
See Appendix D for illustrations of typical printouts.
For example the upper two digits may be the line
number and the tower two digits may be the metal I
detector number.
Printer (Printer - YES/NO)
Select YES if a printer is installed.
No should always be selected when a printer is not
installed.
Page 34
Test Samples (FERROUS – #.#mm / NONE
FERROUS – #.#mm / STAINLESS STEEL 0.#mm)
This allows the user to setup test sample materials
and sizes which will be prompted for during the
performance check. There are three independent
settings for each of the twenty one product
numbers.
Setting the time to 0 00 disables timed shift reports.
Shift Report Start Time (Shift Report Start H.## /
M W) – Firmware 2.10 or qreater
The start time of the shift report can be set to allow
automatically printed shift reports to be started from
a specified time.
Selecting the soft key adjacent to the material will
allow selection of ferrous (Fe.), none ferrous (NFe.), or stainless steel S/S)l.
The ’H’ stands for hours and can be adjusted to a
maximum of 23.
The ’M’ stands for minutes and can be adjusted to a
maximum of 59.
Having selected the material select the soft key
adjacent to #.0mm and enter the test sample size.
Press ENTER to store the selected material and
test sample size in memory.
Test Interval (Test interval - H #/ M.##)
The test interval is the time period between which
the metal detector system requests the QA
personnel to carry out a performance check.
Shift Report Options
The following options, if selected ’IN’, will be
recorded and printed out as part of the shift report.
The message ’REQUEST FOR PERFORMANCE
CHECK’ appears on the control module display
when a test is due.
Reiect Relay Operations (Reject Rly Oper’ns –
IN/OUT)
If ’IN’ is selected the shiff report will include the date
and time of all reject delay operations since the last
shift report.
With Module firmware version 2.10 (or greater) an
optional output is available which could be used to
drive an external indicator to attract the attention of
the QA operator.
The test interval time is restarted when a
performance check is carried out.
Modified Settings (Modified Settings – IN OUT)
If ’IN’ is selected the shift report will include certain
settings which have been changed since the last
shift report. The shift report will include the settings
new value / condition and the date and time when it
was changed.
The ’H’ stands for hours and can be adjusted to a
maximum of 8.
The settings which are recorded are;
This will allow a time interval of up to 8.59 between
performance checks.
The ’M’ stands for minutes and can be adjusted to a
maximum of 59.
Prod No, Sens, Phase, Timer Type, Reference
Phase, Pack and Reject Count Resets and Reject
Inhibit
Setting the time to 0.00 disables requests for timed
performance checks.
Shift Report Interval (Shift Report Int. – H. / M.M)
Overdue Period (Overdue Period - H. # /M.##)
The shift report can be automatically printed on a
timed basis.
This is the time period allowed, following a
performance check request, before the test is
classed as being overdue.
The ’H’ stands for hours and can be adjusted to a
maximum of 8.
The ’M’ stands for minutes and can be adjusted to a
maximum of 59.
This will allow a time interval of up to 8:59 between
shift reports.
If the overdue period is reached the ’REQUEST
FGR PERFORMANCE CHECK’ message is
changed to ’OVERDUE FOR PERFORMANCE
CHECK’ and the bar graph display and buzzer are
sequenced on and off to attract attention. An alarm
output is also available, see ’Alarm if overdue’.
The maximum overdue period is restricted to half of
the test interval time.
Page 35
Alarm If Overdue (Alarm If Overdue – YES/NQ)
Carrying out a performance check;
If Reject Confirmation hardware is fitted this option can
be selected to operate the system fault relay (See ’Power
Unit Electrical Connections’ in the Installation section)
when a performance check becomes overdue.
The test sample(s) should be passed though the metal
detector with the product.
If inspecting individual products prepare a sample pack
(one for each> test sample) containing the test sample.
Note on module firmware version 2.02 and less the RCU
must be selected in the Engineers mode for this facility to
operate.
Position the test sample at the rear/trailing edge of the
product and in a position which places it as close as
possible to the centre at the aperture metal detector
aperture when the product is passed through the
detector.
Change QA Operator Code (Change Cod” QA # ####)
Allows the setting of the nine QA operator codes.
1) Enter the QA access code (QA inspector or QA
Operator ).
Select the soft key adjacent to the arrowed line ( ^ – -) to
select the QA operator number (i.e 1 to 9).
2) It accessed by QA inspector code press ’TEST’, the
display reads
Select the soft key adjacent to # # # # and enter the
required code Press ENTER to store the new code in
memory.
FERROUS NONE FERRQUS
EXIT STAINLESS STEEL
PERFORMANCE VALIDATlON PROCEDURE
3) Select the material to be tested, the display reads Pass . #.#mm i Fe. / N-Fe. / S/S sample
A performance check may be carried out at any time.
PASSED
The PVR may have been configured to automatically
prompt the user (normally authorised QA personnel) to
carry out a performance ctieck. This will occur at regular
intervals, determined by the pre-programmed test
interval.
4) The display prompts the operator to pass the’ selected
test sample through the metal detector.
If inspecting individual product place the sample pack
prepared earlier on the conveyor belt and allow it to pass
through the detector.
If the test interval has been set the time of the next
performance check can be checked by pressing ETC
twice from the normal running display. the display will
show the ’Current Time” and the Next QA Test time .
if the product is loose place the test sample on the
conveyor belt (or into the product flow) and allow it to
pass through the detector.
NOTE5
1)
If the PVR has been configured for timed
performance checks then the test interval time will be
restarted when-ever a performance check is carried
out
2) If the operator wishes to check the operation of the
reject mechanism to its highest level, to ensure correct
operation at the worst case extremes it will be necessary
to follow instruction
13) on Page 22 when passing through the sample or
contaminated pack Also refer to ’Sample Size’ on Page
21 to ensure that the correct size sample is used.
FAILED
Ensure that the test sample is detected and (if applicable)
that the sample pack / test sample i-; successfully
rejected.
If note 2) is being followed it may be necessary at this
point to pass the contaminated product or test sample
through again.
Enter the result of the test by pressing the ’PASSED’ or
’FAILED’ soft key, the display reads as shown in 2).
If a LPU is installed, the result will be printed for
confirmation of the test.
If there are more test samples to be checked continue
from step 3),
If the performance check has been completed press the
’EXIT’ soft key or the ’PRQG/EXIT’ key.
Page 36
Settings printout
PRINT-OUTS / DATA COLLECTION
This printout contains all the Engineer and QA settings.
1)
Information (or data) being transmitted by the metal
detector may be transferred directly to paper by using a
local printer unit (LPU). Alternatively it may be collected
by other types of ’intelligent’ equipment.
Enter QA Inspector access code.
2) Press ’PRINT’ soft key the display reads.
PRINT ALL SETTINGS PRINT SHIFT REPORT
3) Setect PRINT ALL SETTINGS.
The following description assumes that a LPU is being
used to obtain a ’hard copy’ print out of information
available from the metal detector.
For this facility to work the ’Printer – YES/NO’ option in
the QA Inspector setup mode must be selected.
See Appendix D for ’Sample Printed Reports Showing
Format And Contents’.
Connection of the LPU is to COM1 on the metal detector
power supply unit. See Appendix C for ’Setting ’Up And
Connecting A Printer To The Metal Detector’.
3)
If nothing further is required press the PROG/ EXIT
key to return to the running mode.
Performance Check printout
As detailed in The Performance Validation Rou- tine
section above, printouts are immediate when a
performance check is carried out.
Printer Error Messages
There are currently two error messages associated with
the printer / data collection unit, these are:-
Shift Report printout
1) DATA COLLECTION UNIT NOT READY
Depending on how the QA Inspector has setup the PVR
the shift report printout may include all reject relay
operations and/or modified settings or no shift information
at all.
This occurs if the module can not communicate with the
printer,
Check –
Once a shift report has been printed the metal detector
starts to accumulate information for the next shift and the
previous shift report is abandoned.
The shift report is printed under any one of the following
three condition;
1)
On a timed basis – see under ’Configuring The PVR’
the ’Shift Report Interval’,
2)
When selected in the QA Inspector mode.
a)
Enter QA Inspector access code.
b)
Press ’PRINT’ soft l<ey the display reads.
a) is the printer powered up?
b) is the printer set up correctly (see Appendix C for
’Requirements Of Your Serial Printer’) ?
c) is the wiring and connections from the metal detector
to the printer correct ’?
d) has the printer paper run out or the paper jammed?
e) is the printer ’on line’?
2) DATA COLLECTION UNIT NOT CONFIGURED
PRINT ALL SETTINGS
This occurs if the printer is not configured in, either by the
supplier, or by the customer from within the QA Inspector
mode.
PRINT SHIFT REPORT
c) Select PRINT SHIFT REPORT.
c) If nothing further is required press the PROG/ EXIT
key to return to the running mode.
This will only occur following an attempt to drive the
printer from the QA Inspector mode.
3) If the accumulated shift report information exceeds the
available storage space. This is not likely to happen
under normal operating conditions.
Page 37
APPENDIX A
A Rotary Encoder Used As A Speed Sensor
For The tm3[G] Timer
Speed Sensor Requirements
Speed Sensor Electrical Connections
The speed sensor may be:
Refer to the Installation section.
a) a purpose bought item, known as a Rotary
Encoder, or
Connect the sensor to the terminals labelled Speed
Sensor.
b) a Proximity/Photo-electric sensor together
with
the necessary hardware to produce a
pulse output
from rotary movement.
Producing A Rotary Encoder Using A
Proximity or Photo-electric Sensor
In either case the device must be coupled up to the
conveyor drive system to give a pulse output signal in
direct relation to the distance moved by the conveyor.
The device chosen must have the following
electrical specification:
Operating Voltage-
+15 V D.C.
Quiescent Current -
60 mA maximum.
Output Type -
NPN open collector.
PNP output devices can be accommodated by
changing the internal link arrangement in the detector
head.
Note
If a pack sensor is also being used, both the pack
sensor and the speed sensor must be the same
output type, NPN or PNP.
Output Voltage:-
15 V minimum.
Output Current:-
10 mA minimum.
Output Waveform:-
Pulse output
Pulse width:-
10 ms minimum.
Frequency:-
50 Hz maximum
Figure A-1
Figure A-1above shows a possible technique for
producing a rotary encoder using a proximity or
photo-electric sensor.
The disk shown has been drilled so that the sensor
will give a pulse output as the rotating disk
intermittently interrupts its sensing area.
The sensor shown would typically be a proximity type
and the disk would be fabricated from mild steel.
Alternatively a two part photo-electric sensor could be
used, i.e with separate transmitter and receiver or
with combined transmitter and receiver and reflector.
Avoid the use of photoelectrics that require the disk
itself to reflect the beam.
Page 38
(see Figure A-3 below), follow these steps.
Both proximity and photo-electric devices are
available in a slot sensor type construction, which can
be mounted to sit astride the disk. If this technique is
used the disk should be slotted rather than drilled.
Disc Construction
The disk diameter and number of holes/slots can be
determined when the required shift distance of the
speed sensor is known (see following section). If the
required shift distance is 25mm/shift then the hole/slot
pitch of the disk should be designed so the sensor
gives one pulse cycle out for 25mm moved by the
conveyor, see Figure A-2 below.
1)
If
Find the point on the table where d lies
between the minimum and maximum limits.
this value lies at more than one point in the
table select the point that corresponds to the
smallest shift distance,
Example.
Hole Pitch = 6.283 x radius / number of holes
For, d = 1000 mm (39 inch)
Figure A-2
This value lies at four points in the table,
which corresponds to shift distances of
13 mm, 19 mm, 25.5 mm and 32 mm.
In building the disk, make sure that the solid and gap
width are such as to keep the pulse width and
frequency within the specified limits.
Select the smallest value, 13 mm (0.5 inch).
Determining The Required Shift Distance
Of The Speed Sensor
2)
The speed sensor provides digital pulses in relation to
the distance moved by the conveyor. The
incremental distance moved between pulses is known
as the SHIFT distance and is the smallest interval
measurable by the detector (i.e. its resolution).
Table A-1 can be used to determine the shift distance
for your system. Using distance, d, between the
detection and rejection points
Shift Distance
Detection to
Rejection.
Distance, d
Minimum
Maximum
Maximum conveyor
speed
6.5 mm
(0.25 inch)
191 mm
(7.5 inch)
635 mm
(25 inch)
19 m/min
(62.5 ft/min)
Next check that your maximum conveyor
speed does not exceed the limit specified in the
table.
Example.
For, d = 1000 mm (39 inch) and,
Shift Distance = 13 mm (0.5 inch)
The maximum conveyor speed is 38
m/min (125 ft/min).
13 mm
(0.5 inch)
381 mm
(15 inch)
1270 mm
(50 inch)
38 m/min
(125 ft/min)
Page 39
19 mm
(0.75 inch)
572 mm
(22.5 inch)
1905 mm
(75 inch)
57 m/min
(187.5 ft/min)
25.5 mm
(1.0 inch)
762 mm
(30 inch)
2540 mm
(100 inch)
76 m/min
(250 ft/min)
32 mm
(1.25 inch)
953 mm
(37.5 inch)
3175 mm
(125 inch)
95 m/min
(312.5 ft/min)
If your maximum conveyor speed exceeds this limit
then choose the next point up, where in our example
the shift distance is 19 mm. At this point distance d
still lies within limits, and we have an improved
maximum conveyor speed at the expense of a larger
shift distance.
If your maximum conveyor speed still exceeds the
tabulated limit then choose the next point up,
providing, as in our example, distance d still lies
within limits.
Page 40
APPENDIX B
Hardware Failure Numbers, Variable Error Numbers
Circuit Fault Numbers And Warning Numbers.
GENERAL
The metal detector carries out various test functions to
ensure that it is operating correctly. Some of these
tests are carried out during power-up and others are
done on a continuous basis.
Any test which fails is displayed on the LCD display as
an error number. The type of errors are categorised as:
The flashing segments of the bar graph are cleared by
powering down and back up again with no Variable
Errors.
Action
Check all your programmed settings and the operation
of the system and contact the supplier.
Hardware Failure No’s.
Variable Error No’s.
CIRCUIT FAULT NO’S
Circuit Fault No’s.
During power-up and normal running of the system the
firmware carries out various monitoring tasks to ensure
circuit functionality, any error is displayed as a Circuit
Fault Number.
Warning No’s.
Circuits Fault 1, 2 and 3 prevent the metal detector
from operating and forces a reject condition.
HARDWARE FAILURE NO’S
During power-up the firmware runs basic tests on the
CPU Board hardware, any error is displayed as a
Hardware Failure Number.
If a Reject Confirmation Unit (RCU) is fitted and
operating the ‘system fault relay’ contacts will be
activated.
Any of the above Hardware Failure numbers prevents
the metal detector from operating.
Action
Action
Replace the module or contact the supplier.
Replace the Module or contact the supplier.
Circuit Fault 4 and 5 do not prevent system operation
but action must be taken.
VARIABLE ERROR NO’S
Action
During power-up ‘SELF TEST’ the firmware runs test
on all the user programmable variables, such as the
SENSitivity, PHASE and Timer settings.
Contact the supplier.
Any corrupted variable is replaced with its default value
and the 21st to 25th segment of the bar graph display is
flashed to warn the user.
Action
The metal detector is not prevented from operating.
Circuit Fault 6 does not prevent system operation.
Repeat auto-setup and when the LCD message reads
“Ensure no product is passing through aperture” please
make sure that this instruction is followed. If the
problem still exists contact the supplier.
Page 41
WARNING NO’S
OTHER FAULT MESSAGES
During power-up the firmware checks the module
memory and the detector head memory for validity, any
errors are displayed as Warning Numbers.
BALANCE FAULT CONTACT SUPPLIER
If Warning 1 occurs it will be followed by the question:
Maintain Module
YES>
settings ??
NO>
This message on the LCD prevents the metal detector
from operating and forces a reject condition.
Select the ’YES’ soft key option - be patient it will take
several seconds to transfer the module settings to the
head.
If a Reject Confirmation Unit (RCU) is fitted and
operating the ‘system fault relay’ contacts will be
activated.
Action
Action
Contact the supplier.
Ensure that the metal detector is not powered down for
30 seconds, following a change to any of the settings.
WARNING - No communications hardware.
If the problem still persists contact the supplier.
Note: If it is the first time the metal detector has been
switched on with a new interconnection board then
there is nothing to worry about.
Warning 2, 3 and 4 are displayed continually and
prevent the system from running. Pressing any key will
put the metal detector into its normal running mode.
This message appears on the LCD during power-up
‘SELF TEST’ if communications is configured in and
the module does not have the correct hardware.
The display remains for approximately 10 seconds and
then self clears.
Action
If RS232 communications is required contact the
supplier.
The metal detector may still be used if the message
was a Warning 4.
Action
BAD ROM CHECKSUM FOUND: MACHINE FAULT
XXXX.
Check all your programmed settings and the operation
of the system and contact the supplier.
This message appears on the LCD during power-up
‘SELF TEST’ if a fault is found with the firmware.
This condition prevents the metal detector from
operating and forces a reject condition.
Action
Contact the supplier.
WARNING DATE/TIME NOT SET UP
The message will normally follow a WARNING 4
condition and is displayed continually preventing the
system from running. Pressing any key will put the
metal detector into its normal running mode.
Action
Set the date and time and check all your programmed
settings and the operation of the system and contact
the supplier.
Page 42
APPENDIX C
Setting Up And Connecting A Printer
To The Metal Detector
GENERAL
Information (or data) being transmitted by the metal
detector may be transferred directly to paper by using a
printer.
Alternatively it may be collected by other types of
‘intelligent’ equipment such as a terminal or computer.
This appendix is intended for users who wish to use
their own printer or data collection device, and although
all references throughout this text assume it is a printer
that is being used, it applies just as equally to a data
collection device.
Connecting Your Printer
The metal detector has two serial communication ports
COM1 and COM2 both accessible from the P/S
Connection PCB within the Power Unit Enclosure. See
‘Power Unit Electrical Connections’ in the installation
section.
The printer connects to COM1.
See ‘Connection Of Printer To Metal Detector’ over leaf
for details.
COM2 is not used for the printer.
Requirements Of Your Serial Printer
Currently the printer driver supplied as standard with
the metal detector is designed to drive any serial dotmatrix printer.
The format of the information being output by the metal
detector is in columns of up to 42 characters. This
means that for optimum appearance and clarity your
printer should be 42 columns or greater.
The serial communication parameters of your printer
must be setup as follows:
Baud rate : 9600
Data bits : 7
Start bits : 1
Stop bits : 1
Parity bits : 1 Odd
The printer must operate with RS232 voltage levels (i.e.
typically +-9V) and not TTL voltage levels.
The printer ideally will use hardware handshaking
although X-ON and X-OFF software handshaking is
supported but must be selected from the engineers
mode.
Page 43
CONNECTION OF PRINTER TO DETECTOR
NOTES
1)
Many printers do not require CTS, DSR or DCD to be at active levels.
However it is accepted good practice to connect these signals together as shown.
2)
The printer pin numbers shown are for an RS232 25-way D-type connector - if your
printer uses a 9 way D-type connector consult the printer manual for the correct pin numbers.
3)
These are the terminal numbers of the COM1 connectors on the P/S
Connection PCB within the Power Unit Enclosure.
Page 44
APPENDIX D
Sample Printed Reports Showing
Format And Contents
Metal Detector Current Settings
Note: Individual printouts will vary according to the settings stored in the detector
** SETTINGS**
Date
01 Jan 1998
Serial No
Machine ID
Time
13:41:47
; 4321
; 203
*Detector Settings*
Prod
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
Sens
199
195
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
180
Phase
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
Timer
A
B
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Timer Group
Type
Reject
;A
; TM1
; 100ms
Timer Group
Type
Reject
Sig Delay
;B
; TM2
; 100ms
; 200ms
Timer Group
Type
Reject
Sig Delay
;C
; TM3
; 10ms
; 100
Ref Phase
Speed ; LOW
Drive Lvl
Boost
Reject Inh
Buzzer; ON
; 2600
Current
Prod No
Page 45
; 100
; NO
; NO
; 00
QA Settings Printout
Shift Report Printout
** SHIFT REPORT START **
* QA Settings *
Line ID
Printer
Relay Rpt
Settings Rpt ; YES
Report Int
Test Int
Overdue Int
Alarm
Prod No
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
Fe
1.2
1.5
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
; 0205
; YES
; YES
;
;
;
;
Time
01 Jan 1998
10:30:15
*Reject Relay Operated*
8:00
2:00
0:30
NO
N/Fe
1.5
1.8
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Date
Date
S/S
1.5
1.8
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Time
01 Jan 1998
09:00:45
01 Jan 1998
09:00:45
01 Jan 1998
09:00:46
01 Jan 1998
09:00:47
01 Jan 1998
09:00:48
01 Jan 1998
09:31:03
01 Jan 1998
10:05:59
01 Jan 1998
10:06:00
*Modified Settings*
Date
Time
01 Jan 1998
09:01:15
Prod No
; 01
Sens
; 156
Phase
; 3100
Timer
;B
Rej Count
Pack Count
; RESET
; RESET
Current
Prod No
Page 46
; 00
Shift Report Printout - continued
Date
Time
01 Jan 1998
09:01:15
Prod No
; 02
Sens
; 185
Timer
;A
Ref Phase
; 2850
Reject Inh
; YES
Current
Prod No
; 01
Date
Time
01 Jan 1998
09:01:15
Reject Inh
; NO
Performance Check
* Performance Check *
Date
01 Jan 1998
Time
10:45:00
Line ID
; 0205
Operator
; QA INSPECTOR
Prod No
; 01
Sens
; 156
Phase
; 3100
Timer
;B
Material
; FERROUS
Size
; 1.5mm
Dtection
; YES
Reject Rly
; YES
Result
; PASSED
Material
; STAINLESS STEEL
Size
; 1.8mm
Dtection
; YES
Reject Rly
; YES
Result
; PASSED
Current
Prod No
; 01
**SHIFT REPORT END**
Page 47
APPENDIX E
Firmware Versions 2.13, 2.15 and Higher
Product Signal Cancellation
-
loose or variable product
Phasing out a product effect signal whether
manually or automatically very often does not
eliminate the product signal entirely. The
remaining signal normally means that the
metal detectors sensitivity must be reduced to
eliminate the product signal entirely, and this in
turn leads to reduced performance.
-
pipe line systems
-
gravity fall systems
-
variable speed systems (unless PSC is
setup each time the speed is changed)
PSC Setup
Product Signal Cancellation (PSC or Product
cancellation) aims to eliminate any remaining
product effect signal without the need for
running at reduced sensitivity.
1) Pack sensor calibration
If the reject timer used is a tm2(G), the
following setup is not required.
System /Product Requirements
-
-
Fixed speed photogated conveyor
system.
The pack sensor must be
mounted before and as close to the head
as possible.
Minimum belt speed of approximately 10
m/min.
i)
Select tm2(G) from a different timer
group.
ii)
Select Window Time. When RUN is
displayed, pass the product. After a
Window Time value is displayed, press
Enter.
iii) Reselect the original timer group.
-
Maximum pack length 1 m.
-
The product effect must be consistent.
-
There must be sufficient space between
consecutive packs for the pack sensor to
register them as discrete products.
Note - this only needs to be done ONCE.
2) Cancellation Setup
-
-
i) Set the following display to YES
(Firmware Version 2.15 or greater).
Presentation of the product must be
consistent, product guides may be
needed.
ii) PSC is available in Prod. No. 1 to 5.
Select the appropriate Prod. No.
Up to 5 correctly presented products may
be in the aperture at any one time.
iii) Select
PHASE
and
carry
AUTOMATIC Product adjustment.
If any one of the above requirements are not
met, consult with your supplier.
out
iv) At the end of Product adjustment, it
should display:
PSC Limitations
There are certain applications where PSC will
not work:
Page 47A
If not, it will mean the sensitivity setting can not
be improved upon and cancellation will be
ineffective.
v) Select YES
vi) The product will require three further
passes, after the first
Once PSC is setup and working, if required
SENS can be manually adjusted but PHASE
cannot. If PHASE is adjusted PSC will stop
working and the 'P' in PHASE will stop flashing
(Firmware Version 2.15 or greater).
VIEWING Mode
The VIEWING mode is a new access level.
The user may view all settings that are
normally set in the ENGINEERS mode but
cannot change them. The default code is
0005.
Will be displayed. After the second
This may be changed in the ENGINEERS
access mode.
will be displayed. After the third
Japanese Language
Japanese has been added to the list of
languages available to the metal detector. As
with the other language options, all displays
have been translated. Printouts however, have
not, they will remain in English (2.21 and
above have Japanese printouts).
will be displayed. The final message will
be
Due/Overdue Alarm Output
vii)If at any stage an error has occurred or
the PROG/EXIT key has been pressed,
the following will be displayed
There has been a change to a Performance
Validation Routine setting. In QA SETUP,
Alarm if Overdue -
YES/NO
has changed to,
and the settings from the first part of
Product adjustment will be used with PSC
not working.
viii) The letter 'P' in 'PHASE' will flash
(Firmware Version 2.15 or greater)
indicating PSC is working.
Alarm if -
- DUE/OVERDUE
An independent alarm output is available if a
Performance Check becomes either due or
overdue.
This is an open collector output, capable of
sinking a maximum current of 100 mA, at a
maximum voltage of 30 V.
IMPORTANT
To achieve optimum performance and prevent
false detections, the conveyor belt MUST be
free from contamination.
The position of the pack sensor MUST detect
the pack at a regular point. If the pack has a
tag or joint on the leading edge, the pack
sensor detection point could be inconsistent
and lead to impaired operation.
Page 47B
(Note - reject confirmation does not have to be
selected).
DRAWING LIST
Flow Chart – Running Mode
Page 49
Flow Chart – Operator Mode
Page 50
Flow Chart - Supervisors Mode
Page 51
Flow Chart – Engineers Mode
Page 52
Flow Chart – QA Operator Mode
Page 54
Flow Chart – QA Inspector Mode
Page 55
Flow Chart - Auto-setup Routine
Page 56
Flow Chart – tm1 Timer
Page 57
Flow Chart – tm2[G]
Page 58
Flow Chart – tm3[G]
Page 59
Typical Metal Detector Conveyor System
Page 60
Serial Number # # # #
Ver #.# #
M/C Model # # #
RECALL
Product Number 00
SENS. # # #
PROD. No.00
< ETC Safeline Ltd.
ETC
SENS. # # #
< ETC
Pack Count
########
< ETC
Reject Count # # # #
Product Number 01 to 20
PROG
/EXIT
ETC
< ETC
Current Time # # : # #
Next QA Test # # : # #
ETC
PROD. No. # #
PHASE # # #
Enter security code ####
Next QA Test is Omitted if
QA Test Intervals is set to
Zero.
Access Modes
RUNNING MODE
FLOW CHART - VERSION 2.01 to 2.49
Page 49
ETC
RUNNING
MODE
Pack count
Reject count
ETC
########
####
ETC
PROG/EXIT
ENTER
OPERATOR CODE
SENS. # # #
>
PROD.No. # # >
PHASE # # # #
ENTER
Full Access
sensitivity adjustable
SENS. # # #
PROD.No. # # >
PHASE # # # #
PROG/EXIT
ENTER
Limited Access
( Sensitivity not adjustable )
OPERATOR MODE
FLOW CHART - VERSION 2.01 to 2.49
Page 50
CURRENT TIME
NEXT QA TEST
##:##
##:##
ETC
RUNNING
MODE
Pack count
Reject count
ETC
########
####
CURRENT TIME
##:##
NEXT QA TEST
##:##
ETC
PROG/EXIT
ENTER
SUPERVISOR - CODE
SENS. # # #
PROD.No. # #
PHASE # # # #
>
>
>
ENTER
Product
Adjustment
AUTOMATIC>
MANUAL >
ETC
SELECT TIMER A B C >
ETC
REJECT COUNT # # # #
RESET >
ETC
ETC
PACK COUNT # # # # # # # #
RESET >
PROG/EXIT
SUPERVISOR MODE
FLOW CHART - VERSION 2.01 to 2.49
Page 51
To Auto-setup
Sub-routine
ETC
PACK COUNT
RUNNING
MODE
########
CURRENT TIME
##:##
NEXT QA TEST
##:##
ETC
ETC
REJECT COUNT
####
PROG/EXIT
ENTER
ENGINEERS MODE
SENS. # # # >
PROD. No. # # >
PHASE
>
ENTER
ProductAdjustment
AUTOMATIC>
MANUAL>
To Auto-setup
Sub- routine
ETC
POWER DRIVE
###>
ENTER
ETC
To timer sub-routine
Select Timer A B C >
ETC
INVERSE DETECT - YES/NO
ETC
REJECT COUNT # # # #
RESET >
ETC
PACK COUNT # # # # # # # #
RESET >
ETC
SEE OPERATING MANUAL
PRIOR TO ADJUSTMENT
ADJUST REFERENCE PHASE >
ETC
REFERENCE PHASE # # # # >
SENS. # # # # >
ETC
OPERATOR ACCESS - FULL/LIMITED
ETC
A
B
ENTER
C
CONTINUED ON
NEXT PAGE
ENGINEERS MODE
FLOW CHART - VERSION 2.01 to 2.49
Page 52
CONTINUED FROM
LAST PAGE
A
B
C
DETECTION BUZZER -ON/OFF
ETC
CHANGE CODE - OPERATORS
SUPERVISORS
CHANGE( .......... ) CODE
####
ETC
CHANGE CODE - OPERATORS
QA INSPECTOR
ENTER
NEW (...........) CODE
####
ETC
DETECTOR SPEED. - HIGH/LOW
ETC
REJECT INHIBIT - YES/NO
ETC
REJECT CONFIRM - YES/NO
ETC
ETC
REJECT CONFIRMATION
EXTENSION TIME # # # # >
ENTER
Extension time becomes
window time when atm3
or tm3G timer is selected.
BOOST MODE - YES/NO
ETC
LANGUAGE - ENGLISH/FRENCH/GERMAN/SPANISH/DUTCH/ITALIAN
SWEDISH/DÄNISH/JAPANESE
ETC
Firmware-Version 2.10 or greater
ETC
SET DATE >
YEAR # # # # >
MONTH # # >
DAY # # >
ENTER
Firmware-Version
2.21 or less.
SET TIME >
ETC
ETC
24 HOUR # # >
MINUTE # # >
ETC
PRINTER HANDSHAKE - HW/SW
ETC
Firmware-Version 2.10 or greater
ETC
PROG/EXIT
ENGINEERS MODE
FLOW CHART - VERSION 2.10 to 2.49
Page 53
ENTER
ETC
PACK COUNT
REJECT COUNT
RUNNING
MODE
########
####
ETC
PROG/EXIT
EXIT
ENTER
QA OPERATOR CODE
FERROUS >
NONE FERROUS >
Pass #.#mm Fe/NFe/SS
sample
PASSED >
FAILED >
QA-OPERATOR MODE
FLOW CHART - VERSION 2.01 to 2.49
Page 54
CURRENT TIME
NEXT QA TEST
##:##
##:##
ETC
RUNNING
MODE
PACK COUNT # # # # # # # #
REJECT COUNT # # # #
ETC
ETC
CURRENT TIME # # : # #
NEXT QA TEST # # : # #
PROG/EXIT
ENTER
QA INSPECTOR
CODE
ETC
PRINT ALL SETTINGS >
PRINT SHIFT REPORT
PRINT>
TEST>
QA SETUP>
See QA Operator Mode
ETC
YEAR # # # # >
MONTH # # >
DAY # # >
SET DATE >
FIRMWARE-VERSION
2.22 OR GREATER
SET TIME >
ETC
ENTER
24 HOUR # # >
MINUTE # # >
ENTER
ETC
LINE ID. # # # # >
ENTER
ETC
Printer – YES/NO
ETC
FERROUS/NON FERROUS/STAINLESS STEEL >
#. # >
ENTER
EETC
Reject Relay operations IN/OUT
SHIFT REPORT OPTIONS>
ETC
ETC
Modified Settings IN/OUT
ETC
Shift Report Int.
ENTER
H. #>
M.# # >
ETC
Firmware version 2.10 or greater
Shift Report Start
H. #>
M. # #>
ENTER
ETC
Test Interval
H. #>
M. # #>
ENTER
Overdue Period -
H. #>
M. # #>
ENTER
ETC
ETC
Alarm if Overdue – YES/NO
ETC
Change Code – QA # # # # #>
^ - - - - ->
ETC
PROG/EXIT
QA-INSPECTOR MODE
FLOW CHART=VERSION 2.01 to 2.49
Page 55
Entered from Engineer or Supervisor mode.
Make sure that no product is passed through
the metal detector when this message is displayed.
Ensure no product is
passing through aperture
Please wait
Product signal too large
Please wait.
Pass product through
aperture.
Adjusting phase.
Please wait.
Product signal too large
Please wait.
Pass product through
aperture.
Adjusting sensitivity.
Warning phase setting
may be in error.
This display may appear if the
product signal level was very small.
Product adjustment
complete.
Return to Engineer or Supervisor mode.
PROG/EXIT Key will terminate the routine at any point.
AUTO SETUP SUB -ROUTINE
FLOW CHART - VERSION 2.01 to 2.49
Page 56
SELECT TIMER A
>
SELECT TIMER B
>
SELECT TIMER C
>
< TIMER
° A/B/C ° UPDATE
NO
< TIMER
° A/B/C ° UPDATE
NO
TIMER TYPE
tm3[g]
>
TIMER TYPE
tm2[g]
>
TIMER TYPE
tm1[g]
>
See separate sub routine
tm1
ENTER
REJECT TIME
###
>
TIMER
° A/B/C °
TYPE tm1 SET/UPDATED
Return to main menu
tm 1 TIMER SUB-ROUTINE
Engineer Mode – Version 2.01 to 2.49
Page 57
Tm2[G]
TIMER SUB-ROUTINE
ENGINEER MODE – VERSION 2.01 to 2.49
SELECT TIMER A
>
SELECT TIMER B
>
SELECT TIMER C
>
< TIMER " A/B/C " UPDATE
NO
< TIMER " A/B/C " UPDATE
YES
See separate sub routine
TIMER TYPE
tm3[g]
>
TIMER TYPE
tm2[g]
>
TIMER TYPE
tm1
See separate sub routine
GATED TIMER STILL
YES
REQUIRED
<
tm2[g]
SYNC DELAY
<
tm2[g]
WINDOW TIME
NO
###
<
tm2[g]
SIGNAL DELAY # # #
<
tm2[g]
REJECT TIME # # #
###
ETC
ENTER
<
tm2[g]
SIGNAL DELAY
<
tm2[g]
REJECT TIME
###
<
tm2[g]
GATED
YES
<
tm2[g]
GATED
NO
###
ENTER
TIMER "A/B/C"
TYPE
tm2[g] SET/UPDATED
Return to main menu
Page 58
tm3[G]
[G]
TIMER SUB-ROUTINE
ENGINEER MODE – VERSION 2.01 to 2.49
SELECT TIMER A
>
SELECT TIMER B
>
SELECT TIMER C
>
< TIMER "A/B/C" UPDATE
NO
< TIMER "A/B/C" UPDATE
YES
TIMER TYPE
tm3[G] >
TIMER TYPE
tm2[G] >
See separate sub routine
TIMER TYPE
tm3[G]
tm3[G]
tm1
>
SYNC SHIFT # # #
WINDOW SHIFT # # #
ETC
ETC
< tm3[G] SIGNAL SHIFT
###
< tm3[G] REJECT TIME
###
GATED TIMER STILL
YES
REQUIRED
NO
< tm3[G]
SIGNAL SHIFT
###
< tm3[G]
REJECT SHIFT
###
ENTER
ENTER
< tm3[G]
GATED
YES
< tm3[G]
GATED
NO
TIMER
"A/B/C"
TYPE
tm3[G] SET/UPDATED
Return to main menu
Page 59
TYPICAL METAL DETECTOR CONVEYOR
Page 60
RECOMMENDATIONS FOR THE USE OF INVERTERS
This is a typical layout of the inverter supplied by safeline.
Do attempt to install, operate, maintain or inspect the inverter until you have read through
the instruction manual supplied with the inverter.
Safeline use Mitsubishi as our supplier of inverters, we know this works well with the metal detector
and we have carried out extensive tests to meet the requirements of the CE regulations.
General counter measures.
1.
2.
3.
4.
5.
6.
7.
8.
Keep wiring inside control box as far away from inverter as possible.
Motor cables should be run separate from any other cables and as far from
the metal detector as possible.
External screened cables should be grounded at suitable intervals where possible.
Remove insulation only where screening clamps are shown to provide good earth
continuity at that point.
Do not run the power cables(I/O cables) and signal cables of the inverter in parallel
with each other and do not bundle them.
Use twisted shield cables for the detector connecting and the control signals.
Ground inverter, motor, etc. at one point.
Capacitances exist between the inverter’s I/O wiring, other cables, earth and motor, through
which leakage currents flow to cause the earth leakage circuit breaker, earth leakage relay to
operate unnecessarily.
To prevent this. take appropriate measures, e.g. set the carrier frequency to a lower value, use
earth leakage circuit breaker designed for suppression of harmonics and surges, and use the
electronic overcurrent protection built in the inverter.
Page 61
(Applicable only if ATEX option is ordered)
ATEX DIRECTIVE
•
•
•
•
•
•
This product complies with the ATEX Category as stated on the ATEX system label shown below.
A static hazard may exist – Do not clean non-metallic parts with a dry cloth.
Ensure torque setting on fixings highlighted below conform to the values stated on page 5 “Technical
Specification”.
Do not open any electrical enclosures when product is energized or when an explosive dust atmosphere is
present.
Regular inspection of plastic and gasket materials should be made to ensure no wear or damage has occurred
that may affect the ingress integrity of the system.
The power supply/module enclosure can in some cases accommodate additional glands that can be fitted by
the end user. If new glands or blanking plugs are fitted by the end user they must ensure that the fitting are of
metal construction and that the ingress integrity of the enclosure is maintained. (Must be sealed to IP6X or
better).
Module cover
fixing bolts
Power supply lid
fixing bolts
Position of EX Label ~
See over for more
details
Endplate fixing
bolts torque 4Nm
Module cover
and power supply
lid fixing bolts
Page 62
(Applicable only if ATEX option is ordered)
ATEX system label
Montford St.
Salford
METAL DETECTION
England
System Identifier
Year of Manufacture
Model
System Rating
IP Rating
Voltage/Spannung/
Tension/Voltaje
100 110 120 220 230 240
Vac
380 400 415 440
Phase/Phase/Phase/ Fase
Frequency/Frequenz
Fréquence/Frecuencia
Power/Leistung/
Puissancé/Poder/
1Ø
3Ø
50
60
Max surface temp/ Maximale
oberflächentemperatur/ Température
maximum de surface/ Temp. superficial max.
Ambient temperature range/
Umgebungstemperaturbereich von/ Gamme
de température ambiante/ Límites de
temperatura
0539
Hz
100 300 600 1K 3K
5K 10K Watts (Max.)
79 oC
-10oC to +40 oC
II 2 D c DEMKO 02ATEX134042
ATEX Static warning label
CAUTION
ACHTUNG
Refer to manual for
connection details
Vor inbetriebnahme
bedienanleitung beachten
ATTENTION
CAUCION
Voir le manuel
avant tout cablage
Le refiere a manual
por conection detalla
A static hazard may exist - do not clean non -metallic parts with a
dry cloth
Es gibt gegebenfalls Probleme mit statischen Aufladungen - Bitte
nicht-metallische Teile nicht mit trockenen Tüchern o.ä. reinigen
Un risque d’électricité statique peut exister - Ne pas nettoyer les
parties non méalliques avec un chiffon sec
Pueden generarse cargas estáticas. No limpiar las partes no
metálicas con un paño seco
ATEX Enclosure warning label
Warning
Achtung
Do not open when
energised or when an
explosive dust
atmosphere is present
Nicht öffnen bei
eingeschalteter anlage
oder in explosiver
atmosphäre
Precaucion
Attention
No abrir bajo tensión eléctrica
conectada, o cuando una
atmosfera de polvo deflagrante
esté presente
Ne pas ouvrir sous
tension ou en présence
d’une atmosphère
explosive
Page 63