Sci Tronic s 1080

8/10/2019 Sci Tronic s 1080

1/36

Metal DetectionSystems

8/10/2019 Sci Tronic s 1080

2/36

1994 SciTronics. All rights reserved. Printed in the U.S.A.

No part of this publication may be reproduced, translated into any language, stored in a retrieval system, or transmitted in anyform by any means without the prior written permission of SciTronics.

Model 1080

Metal Detection System

Product Manual

4630 Churchill, Suite 2

Shoreview, MN 55106

Phone: (612) 415-9690

Fax: (612) 415-9691

8/10/2019 Sci Tronic s 1080

3/36

Table of Contents

i

Table of Contents

Warranty ................................................................................................................ iii

SciTronics Quality Control Standards ................................................................... iv

Section 1 IntroductionUsing This Manual .............................................................................................. 1-1

System Overview................................................................................................. 1-2

Standard Components.................................................................................... 1-3

Theory of Operation ...................................................................................... 1-4

Section 2 System OptionsOverview ............................................................................................................. 2-1Splice Detector .................................................................................................... 2-1

Metal Markers (Tramp Metal Locator)................................................................ 2-1

Flag Drop Solenoid Operated ........................................................................ 2-1

Liquid Spray Pneumatic Operated................................................................. 2-2

Coast Alarm ......................................................................................................... 2-2

Long Bar Detector ............................................................................................... 2-2

Shift Register ....................................................................................................... 2-2

Remote Reset ....................................................................................................... 2-2

Rotating Alarm Beacon ....................................................................................... 2-3

Controller/Sensor Connecting Cable ................................................................... 2-3Single-Unit Coil System...................................................................................... 2-3

Backlit LCD Trip Counter ................................................................................... 2-4

Section 3 InstallationOverview ............................................................................................................. 3-1

Unpacking the Metal Detection System .............................................................. 3-1

Detection Coils Station ........................................................................................ 3-1

Selecting an Installation Location ................................................................. 3-1

Assembling the Coils ..................................................................................... 3-2

Dual Coil System..................................................................................... 3-2Mounting the Structure .................................................................................. 3-3

Controller Enclosure ............................................................................................ 3-3

Mounting ....................................................................................................... 3-3

Wiring ............................................................................................................ 3-3

Options

Single Unit Coil System ................................................................................ 3-6

Splice Detector .............................................................................................. 3-6

Flag Drop Marker .......................................................................................... 3-7

8/10/2019 Sci Tronic s 1080

4/36

SciTronics Model 1080

ii

Liquid Spray Marker ..................................................................................... 3-7

Rotating Alarm Beacon ................................................................................. 3-8

Remote Reset ................................................................................................. 3-8

Section 4 OperationOverview ............................................................................................................. 4-1

Startup.................................................................................................................. 4-1

Operation of the Failsafe Circuitry Option .......................................................... 4-1

Shutdown ............................................................................................................. 4-2

System Calibration .............................................................................................. 4-2

Sensitivity Control ......................................................................................... 4-2

Splice Detector .............................................................................................. 4-3

Alarm Delay .................................................................................................. 4-4

Alarm Duration.............................................................................................. 4-4

Flag Drop Marker Option .............................................................................. 4-5

Liquid Spray Marker Option ......................................................................... 4-5

Long Bar Detector Option ............................................................................. 4-5

LED Indicator Lights........................................................................................... 4-6

Section 5 Maintenance and TroubleshootingOverview ............................................................................................................. 5-1

Maintenance......................................................................................................... 5-1

Spare Parts ........................................................................................................... 5-1

Troubleshooting ................................................................................................... 5-1

Gaining Access to the Electronics Modules .................................................. 5-1

Diagnostic LEDs............................................................................................ 5-2

Coil Drive Indicator Light ....................................................................... 5-2

Power A Indicator Light .......................................................................... 5-2

Power B Indicator Light .......................................................................... 5-2

Power C Indicator Light .......................................................................... 5-2

ASP Indicator Light ................................................................................. 5-2

Splice Indicator Light .............................................................................. 5-2

Section 6 System Specifications

Operational Specifications................................................................................... 6-1Electrical Specifications ...................................................................................... 6-1

Physical Specifications ........................................................................................ 6-2

Section 7 DrawingsList of Drawings .................................................................................................. 7-1

Drawings.............................................................................................................. 7-3

8/10/2019 Sci Tronic s 1080

5/36

Warranty

iii

Warranty

SciTronics warrants all products of its manufacture to be free from defects in material and

workmanship. This warranty is effective for three years from the date of shipment to theoriginal Purchaser.

Upon notification by the Purchaser, SciTronics will correct any defects in equipment of its

manufacture either by repair in our plant or by supply of replacement parts to the Purchaser.

SciTronics must decide to its own satisfaction that the equipment is defective and has not

developed malfunctions as a result of misuse, modification, abnormal conditions of

operation, or attempted service not authorized by SciTronics.

SciTronics will not accept any product returned for refund or approve any backcharge for

labor, materials, or other costs incurred by the Purchaser or others in modification,

adjustment, service, or repair of SciTronics equipment unless such return or backcharge hasbeen authorized in writing to the Purchaser.

Any special test or requirement placed upon SciTronics products or products of other

manufacture used in SciTronics systems must be mutually agreed upon in writing by

SciTronics and the Purchaser prior to the date of shipment.

SciTronics reserves the right to make changes in design or construction of its products at any

time without incurring any obligation to make any changes whatsoever on units previously

purchased.

This warranty is expressly made by SciTronics and accepted by the Purchaser in lieu of all

other warranties, including warranties of merchantability and fitness for particular purpose,

whether written, oral, express, implied, or statutory. SciTronics shall not be liable for normal

wear and tear nor for any contingent, incidental, or consequential damage or expense due to

partial or complete inoperability of its products for any reason whatsoever. In no event shall

SciTronics liability exceed the original purchase price of the equipment.

8/10/2019 Sci Tronic s 1080

6/36


iv

SciTronics Quality Control Standards

SciTronics visually inspects all incoming goods and then assembles them according to

the best electronics shop standards.

SciTronics powers and tests each circuit to exacting operating specifications, observing

the correct function of each component.

When the unit is complete, the entire operating system is assembled and tested to meet or

exceed factory and customer specifications.

After a substantial burn-in period of up to 100 hours, the system is rechecked to the

original specifications. Only then is the system ready for shipment.

8/10/2019 Sci Tronic s 1080

7/36

Section 1 Introduction

1-1


This manual contains the installation, operation, and maintenance

instructions for your SciTronics Metal Detection System.

NOTEThe warranty for your SciTronics Metal Detection

System is on page iii in this manual. Be sure to read it

so you are aware of its provisions and exclusions.

This manual is arranged in the following sections so that you can

find the information you need quickly and easily:


describes the organization of this manual as well as the

features and general operation of the metal detection system.

Section 2 System Options

describes the options that are available from SciTronics for

the metal detection system.

Section 3 Installation

provides instructions for unpacking and installing the metal

detection system and options.

Section 4 Operation

contains startup, shutdown, and calibration procedures for the

metal detection system and describes the function of the LED

indicator lights during normal operation of the system.

Section 5 Maintenance and Troubleshooting

explains how to fix minor problems that may occur with the

metal detection system, such as detecting damaged coils,

cables, and connectors.

Section 6 System Specificationsprovides the specification data for the metal detection system.

Section 7 Drawings

includes the drawings for your specific metal detection

system.

Using This Manual

8/10/2019 Sci Tronic s 1080

8/36


1-2

The SciTronics Metal Detection System is designed to detect tramp

while scanning products such as highly mineralized or magnetic

ores (including magnetite and pyrites, even when conveyed on steel

cable belts) as well as copper, nickel, aluminum, aggregates, coal,rubber, wood chips, sinter, and tar sands. It can also be used in

recycling plants to detect tramp while scanning plastics, glass, or

paper.

The metal detection system has the following features:

The latest electronic design, utilizing all solid-state ICs to

ensure long operating life and trouble-free operation.

Pulsed field operation, which requires no balancing or tuning

and is not affected by temperature and humidity.

A resident diagnostic monitor using LEDs to indicate the

operational status of the circuit.

Programming at the front panel for Alarm Delay, Alarm

Duration, Sensitivity Scale Factor, and Splice Detector

Duration and Threshold.

Automatic spike (interference) protection (ASP) circuitry.

Dual primary (120/240 V) electrostatic-shielded power

transformer and additional RFI-EMI filter for maximum

electrical isolation.

Field-replaceable relays and circuit modules.

Swing-away coil protection.

Conveyor velocity from 6 ft/min to 1,200 ft/min (1.83 m/min

to 365.76 m/min).

The SciTronics Metal Detection System is carefully engineered and

constructed to your specifications. SciTronics uses only the highest

quality components and materials available. With proper installation

and maintenance, your system will provide years of satisfactory

service.

System Overview

8/10/2019 Sci Tronic s 1080

9/36


1-3

The following components are included on all metal detection

systems

Externally located (mounted on the door):

Indicator LightsGreen normal light.

Red alarm light.

Trip Counter

Reset Switch

Internally located within the enclosure:

Sensitivity ControlAdjusts the level of detection.

Fuse, Power Switch, and Operate/By-Pass Switch

Alarm DelayDelays relay contact transfer and is also used for timing for

downstream removal of tramp by a flopgate or diverter belt.

Alarm DurationFor timing the active interval of the metal marker, flopgate, or

diverter mechanism.

ASP (automatic spike detector)An internal monitor that detects electrical noise interference

and discards it from the signal flow path before it can cause a

false trip. Typical noise interference includes communication

radio transmission, lightning, and startup of SCR-controlled

equipment.

Status and Diagnostic LEDsFive standard LEDs and one optional LED (for the splice

detector) on the front panel indicate the operational status of

the following functions:

Generator coil continuity and drive

P-1: Power Logic A

P-2: Power Logic B P-3: Power Logic C

ASP operation

Splice

Standard Components

8/10/2019 Sci Tronic s 1080

10/36


1-4

Theory of Operation The SciTronics Metal Detection System measures the electricalconductivity of material conveyed through the sensor area by

detecting the variations in a pulsed electromagnetic field.

The magnetic properties of a material are completely independent of

conductivity. Even highly mineralized ore has a much lower

conductivity than refined metal. Therefore, both magnetic and

nonmagnetic metals are efficiently detected while so-called product

effects are virtually eliminated.

The pulsed induction technique intensifies the generated

electromagnetic field for very short time intervals. Measurements

taken many hundred times every second during the concentrated

energy pulse provide a very high signal-to-noise ratio without the

heating and stress of the conventional continuous wave method.

A multicoil sensor system, mounted above and below the conveyed

material, causes a more uniform field, providing better detection

sensitivity throughout the burden cross-section. By generating a

configured field pattern, the desired tramp metal signals are

reinforced and extraneous electrical field signals are cancelled.

8/10/2019 Sci Tronic s 1080

11/36


2-1


This section describes the options that are available from SciTronics

for your metal detection system.

Splice Detector (Model 2055) or (Model 2050)

lowers the detection sensitivity, allowing splice/repair areas to pass the

sensor without tripping the alarm. The splice detector is mounted

adjacent to the main sensors, minimizing the splice signal duration

time. The splice detector includes a splice threshold that provides an

adjustable threshold of sensitivity or override. Large tramp may be

detected even though the splice/repair area is traversing the detectionstation coils. The splice detector senses the belt splice before it passes

through the detector coil. The coil is desensitized for an instant while

the splice passes through.

The Model 2055 splice detector is recommended as the standard

application splice detector because it provides outstanding performance

in the less demanding application areas and is very cost efficient.

The Model 2050 splice detector is the proprietary coil. It utilizes the

same generator field and signal processing characteristics as the

main coils. This model is recommended for heavy-duty applicationswith conductive magnetic ores and steel cable conveyor belts.

Single-Flag Drop (Model #2075)orMulti-Flag Dropfor two flags

(Model #2075-2) or three flags (Model #2075-3)

accurately indicates the location of tramp metal on the conveyor.Detector reset is locked out until the flag is retrieved. This flag drop

marker consists of a solenoid, armature/flag assembly, and a lockout

circuit. A normally open contact connected to the active power line

causes the solenoid to operate upon metal alarm. The armature flag

assembly is released and drops on the conveyer. A switch operated by

the armature locks out the metal detector reset until the flag assembly is

retrieved and replaced. A length of chain is used on the flag so that it

does not bounce as it falls onto the moving conveyor. The flag drop

metal markers are available at 120 V or 240 V ac.

Overview

Splice Detector

Metal Markers(Tramp MetalLocator)

Flag Drop SolenoidOperated

8/10/2019 Sci Tronic s 1080

12/36

8/10/2019 Sci Tronic s 1080

13/36

8/10/2019 Sci Tronic s 1080

14/36


2-4

Backlit LCD Trip Counter (Model #4095)

most useful in environments where the lighting is poor, such as

underground mining installations, tunnels, etc.

Backlit LCD TripCounter

8/10/2019 Sci Tronic s 1080

15/36


3-1


Overview This section provides instructions for unpacking and installing themetal detection system and options.

1. Place the shipping containers on a stable surface and open

them, taking care not to damage the contents.

2. Carefully remove the metal detection system from the

shipping containers.

3. Inspect the contents and report any shipping damage or

missing parts to the carrier as soon as possible (most carriers

will not consider a claim unless notified within 15 days of

delivery).

NOTEThe bill of lading for this shipment is an acknowledg-

ment by the carrier of the receipt of the equipment in

good condition. SciTronics is not responsible for any

loss or damage incurred during shipment. Note any

damaged or missing parts on the carriers delivery re-

ceipt. Sign the notation and have the carriers driveralso sign it. The consignee is responsible for initiating

claims against the carrier.

Consider the following factors when selecting a location for the

detection coils station on the conveyor: Allow accessibility for tramp removal.

Do not place near large metal machinery that may move or

rotate within the range of the coils field.

Do not place near high voltage and current power cables for

SCR-controlled drive and crushing equipment.

Unpacking the MetalDetection System

Detection CoilsStation

Selecting an Installation

Location

8/10/2019 Sci Tronic s 1080

16/36


3-2

Be sure that the return idler is not within 4 ft (1.22 m) up or

downstream of the coils location.

There should be a minimum of crossbracing beneath the

coils.

The tramp should not coast over the head pulley.

Remove the metal conveyor deck plate and top cover between the

idlers. If a cover is needed, replace it with wood or plastic. The

spacing between idlers should be 36 in. (914.4 mm) or greater.

Remove the metal skirting approximately 3 ft (.91 m) from the coils.

Replace it with wood or plastic if desired.

Assemble the coils by doing the following:

1. The field generator is the top coil, identified by the four-pin

connector. Position the connector facing up through the

fiberglass support member, away from the belt.

2. The receiver coil looks like the top coil but has a three-pin

connector. Position the connector facing down through the

fiberglass support members, away from the belt. The

connector should face the side of the conveyor closest to thecontroller.

3. Referring to Drawing 1080-200-02, secure the two coils to the

support members using the nylon bolts and nuts that are

included.

Arrange the coils connectors on the same side of the support frame

(the side of the support frame that will provide the most direct route

to the controller enclosure).

Since the frame has a swing-away support for generator coilprotection, mount the frame on the conveyor so the hinge

arrangement for the top coil swings in the direction of belt travel.

The coils support members are drilled so the connector end of the

coils can be placed on either side of the conveyor; mount the coils

connectors on the same side of the conveyor as the controller.

Assembling the Coils

Dual Coil System

8/10/2019 Sci Tronic s 1080

17/36


3-3

Mounting the Structure The coils frame has a 2-in. x 2-in. x 18-in. (50.8-mm x 50.8-mm x3.2-mm) angle iron footing that sits directly on the conveyor

stringers. Bolt or weld it into position. Refer to Drawing 1080-200-

02 for the completed assembly details.

NOTEThe frame may be shipped partially assembled.

Position the frame on the conveyor stringer so that the angle-iron

footing is centered between the idler sets (equal distance from the

upstream and downstream idler sets). Refer to Drawing 1080-200-

011. Be sure that the belt does not rub or touch the receiver (bottom)

coil. A 1- 12-in. (38.1 mm) clearance is recommended; a clearance of

more than 2 in. (50.8 mm) is not recommended. Adjustment holesare provided, allowing the clearance of the generator coil above the

belt to be changed.

Mount the controller enclosure within 25 ft (7.62 m) of the coils

cables supplied. When using additional cable, you may mount the

enclosure up to 300 ft (91.44 m) from the coils cables.

Mount the junction box (if provided) on the coils connector side of

the conveyor.

Mount the controllers of synchronized pairs of detectors (for

operation on adjacent conveyors) within range of the required

interconnected 10-ft (3.05-m) synchronizing cable.

Power and process control wiring is not supplied. Two customer-

supplied electric cables are required:

One 110 V, 60 Hz, electric cable to supply power to the

detector, which is approximately 40 W.

One cable to connect the process control relay to the

conveyor and feed system.

Controller Enclosure

Mounting

Wiring

8/10/2019 Sci Tronic s 1080

18/36


3-4

NOTEOnly 110 V power should be controlled by the relay.

Do not run 480 V lines into the controller enclosure.

Wire the controller enclosure by doing the following:

1. Make openings in the enclosure for coils and process control

and power cables on site in the bottom of the controller box.

The holes may be placed elsewhere in the controller box if

necessary.

CAUTIONDo not allow metal chips or drill turnings from the

openings to enter the detector circuitry. Although thecircuit boards are vertically mounted to minimize the

collection of debris, it is still possible for a conductive

chip to lodge between component leads, which could

destroy the electronics when power is applied.

Cleanliness and caution in this area is strongly

recommended.

2. Route the power and process control wiring through or near

the bottom of the hinge side of the enclosure.

3. Referring to Drawings 1080-101-01 and 1080-101-02,connect power and process control wires to TS-2.

4. The coils station cables may be run in 34-in. (19.1-mm)

conduit for permanent installation. Coils station cable

connections are shown on Drawing 1080-100-011 and

identified on the instrument front panel. Connect coils cables

to TS-1: G = top coil = generator

R = receiver coils = junction box

S = splice coil

CAUTIONSharing coils cable conduit with any other lines or

cables may result in interference.

8/10/2019 Sci Tronic s 1080

19/36


3-5

5. Extra cable may be coiled within the enclosure. Since the coil

cables look similar, keep them identified for pulling through

the conduit.

NOTEThe metal detection system is designed for operation

from an ac power source with neutral at or near earth

potential. The system is not designed for operation from

two phases of a multi-phase system or across the legs

of a single-phase, three-wire system.

CAUTIONCheck the polarity of the power mains. Many conduits

and outlets have incorrect identification or connections.

An incorrect ground may cause major electrical damage

within the instrument when power is applied.

8/10/2019 Sci Tronic s 1080

20/36


3-6

Refer to Section 2 - System Options for more information on the

splice detector option.

Install the splice detector by doing the following:

1. Referring to Drawing 1080-200-03, place the rectangular

inductance splice coil at the edge of the belt between the coils

station and the upstream idler set.

2. Position the supporting angle iron so the top of the coil is as

high as the end of the troughing idler roller.

3. Weld or bolt the support angle to the stringer approximately 8

to 12 in. (203.2 to 304.8 mm) upstream from the edge of the

adjacent receiver coil for a dual coil. Mounting distance for a

single unit coil system is 6 to 8 in. (152.4 to 203.2 mm).

4. Secure the support pipe to the angle bracket with hose

clamps.

5. Mount the coil with the connector facing down, away from

the bottom of the belt in the direction of the belt edge.

6. Adjust the clearance between the face of the coil and belt by

sliding the support pipe either up or down on the angle

bracket.

7. Set the clearance to approximately 1 in. (25.4 mm) andtighten the clamps.

Options

Single Unit Coil System

Splice Detector


single unit coil system option.

The single unit coil system is shipped fully assembled and ready for

installation on the conveyor. Refer to Drawing 1080-200-011B for

dimensional information.

8/10/2019 Sci Tronic s 1080

21/36

8/10/2019 Sci Tronic s 1080

22/36


3-8


rotating alarm beacon option.

Install the rotating alarm beacon on a flat surface or a

1

2

-in. (12.7-mm) pipe. Any convenient distance from the controller is

acceptable. The mounting conduit and connecting wire for the alarm

beacon are not supplied by the factory.


remote reset option.

Wire the remote reset to the controller enclosure by doing the

following (refer to Drawing 1080-101-02):

1. Remove the jumper on TS-2 between terminals 10 and 11.

2. Connect wires WHITE on the remote reset to terminal 10 on

the controller enclosure and BLACK on the remote reset to

terminal 11 on the controller enclosure.

3. Connect the shield wire to earth ground at terminal 1 or to a

chassis ground.

The detector may now be reset after an alarm by either pressing the

pushbutton on the controller enclosure door or by pressing the

pushbutton on the remote enclosure.

Remote Reset

Rotating Alarm Beacon

8/10/2019 Sci Tronic s 1080

23/36

Section 4 Operation

4-1

Section 4 Operation

Overview This section contains the startup, shutdown, and calibrationprocedures for the metal detection system and describes the function

of the LED indicator lights during normal operation of the system.

1. Be sure that power is connected to TS-2 terminals 1, 2, and 3.

2. Turn the contacts switch to BYPASSED to prevent

inadvertent shutdown of the conveyor.

3. Turn the power on at the control panel.

NOTEIf the red light is on at the control panel, press the

RESET switch to put the system into its normal

operating mode.

The failsafe circuitry operates on relay K4 (refer to Drawing 1080-

101-01). The contacts are held in the normal operating position by

the detector power supply. If the line power fails or the detectorpower supply malfunctions, these process control contacts will

change to the alarm state.

A BYPASSED/OPERATE contacts switch enables you to restore

the contacts to normal regardless of the alarm condition of the

detector. This allows you to perform setup and calibration

procedures without stopping the conveyor or dropping the marker

flag.

NOTEThe failsafe circuitry is supplied as a no-charge option

by customer request only.

Startup

Operation of the

Failsafe CircuitryOption

8/10/2019 Sci Tronic s 1080

24/36


4-2

1. Turn the contacts switch to BYPASSED so the conveyor will

continue operation.

2. Turn the power off at the control panel.

NOTEIf you do not turn the contacts switch to BYPASSED,

the conveyor is turned off also.

NOTECalibration can be performed with the contacts in

bypassed mode. Refer to Operation of Failsafe

Circuitryin this section of the manual.

Adjust the metal detection system for the desired detection

sensitivity by doing the following:

NOTE

You can make this adjustment with the belt stopped ifdesired. Move the test tramp by hand through the

detection coils at approximately the same rate as the

actual belt speed.

1. Select a round or cube shape piece of tramp approximately

the size of the smallest piece of metal to be detected.

NOTEA round or cube shape piece of tramp produces the

most uniform calibration results.

2. Transfer the metal through the coils at approximately the

speed of the belt.

Shutdown

System Calibration

Sensitivity Control

8/10/2019 Sci Tronic s 1080

25/36

Section 4 Operation

4-3

3. Adjust the tramp sensitivity control to a value that causes an

alarm each time the metal travels through the coils. Moving

the control knob clockwise increases the sensitivity to detect

the smaller sizes of tramp. Moving the control knobcounterclockwise decreases the sensitivity, causing the

system to detect only larger tramp.

4. If the value needed to attain the desired sensitivity is greater

than 8 or less than 3, change the scale factor by doing the

following:

1) Locate the control recessed behind the panel.

2) Using a screwdriver, turn the screw counterclockwise to

shift the scale to lower the sensitivity and clockwise to

shift the scale to increase the sensitivity. By adjusting the

scale factor control, you can achieve the desired

sensitivity within the sensitivity control range of 8 and 3.

NOTEIf the test tramp is elevated above the bottom of the

belt during adjustment to simulate riding on top of the

burden, a smaller piece of tramp will cause alarm if it

passes through the coils on the bottom of the belt. This

is normal because even multicoil detection systems are

less sensitive near the center of the aperture.

Calibrate the splice detector by doing the following:

NOTES1. Follow steps 15 for the Model 2050 and steps 1,

4, and 5 for the Model 2055.

2. Before calibrating the splice detector, be sure that

you have already calibrated the sensitivity control

by following the procedure in Sensitivity Controlin this section of the manual and set the threshold

control to 10.

1. Turn the conveyor on so the belt is running and turn the

contacts switch to BYPASSED so the conveyor operation will

not be interrupted if the detector alarms on the splice.

Splice Detector

8/10/2019 Sci Tronic s 1080

26/36


4-4

2. Set the splice sensitivity dial to 2.

3. Adjust the splice scale control (screwdriver slot) so that the

splice indicator light turns on each time the splice clamps

traverse the coil. Increase the splice sensitivity setting to 7.

4. Adjust the DURATION control so the splice just clears the

detection coils without alarm. Increase the setting slightly to

provide a margin for normal operational variations in speed

and loading.

NOTERepair patches must be marked with four or more pilot

clips, which should be mounted starting at the edge of

the belt that is scanned by the splice coil. Align them

with the leading edge of the clamp repaired area.

5. Decrease the threshold setting incrementally from 10 until the

splice just causes alarm after passing through the coils. Then

increase the setting by a value of 1 to allow for minor

variations caused by conveyor loading, etc.

NOTEBecause the variations in the above procedure depend

on the individual characteristics of each conveyor belt,

the margin required for reliable operation varies andmust be determined on site.

The alarm delay control can be used to calibrate a metal marking

device or to stop the conveyor at a more accessible location for

removing tramp. Otherwise set it to zero.

The alarm duration control can be used to time the duration of a

spray-type metal marker or diverter gate for automatic trampremoval. Otherwise set it to zero.

Alarm Delay

Alarm Duration

8/10/2019 Sci Tronic s 1080

27/36

Section 4 Operation

4-5

Use the alarm delay control to calibrate the flag marker. Adjust the

control to provide a sufficient delay for the flag to land on the tramp

location. This method allows the marker to be located any

convenient distance from the coils sensing station.

CAUTIONTo minimize the possibility of losing the flag marker

or causing an inadvertent shutdown of the conveyor,

always turn the contacts switch to BYPASSED when

adjusting the metal detection system or turning the

power either on or off.

Calibrate the liquid spray marker by doing the following:

1. Be sure the conveyor is traveling at its rated speed and that

the metal detector is turned on.

2. Place a piece of tramp metal on the belt.

3. Observe the actuation of the marker as the tramp passes

through the sensor coils station.

4. Adjust the alarm delay control until consistent spotting of the

tramp is achieved.

5. Adjust the alarm duration control to increase or decrease theduration of the spray, as desired.

6. The spray gun on the support rod can be rotated for finer

calibration control while using the minimum alarm delay

time.

Calibrate the long bar detector by doing the following:

1. Turn the conveyor on if it is not running.

2. Select a piece of tramp approximately the size to be detected.3. Adjust the tramp sensitivity control to zero so there is no

interference with the bar calibration.

Flag Drop MarkerOption

Long Bar DetectorOption

Liquid Spray MarkerOption

8/10/2019 Sci Tronic s 1080

28/36


4-6

4. Start with a high sensitivity setting on the long bar detector to

establish that the selected bar tramp is within the detectable

range. Lower the setting, reducing the sensitivity on

subsequent passes of the tramp through the coils station untilthe tramp is just reliably detected.

NOTEThe scale adjustment (screwdriver access) may be set

so the required detection is within midrange of the

sensitivity control.

The LED indicator lights monitor the following: Coil Drive

This light turns on to indicate the correct connection and

operation of the generator (top) coil.

Power A, B, and C

This light turns on to indicate proper functioning of the three

main power blocks of the detector electronics.

ASP

This light indicates operation of the automatic spike

protection circuitry. The light is off or flickers momentarilyduring normal operating conditions. When the light remains

on or flickers continuously, a problem in the receiver coils

(bottom) or cables is indicated.

Splice

This light indicates operation of the splice detector and turns

on when the splice goes through the coils station.

During normal operation, the coil drive and power A, B, and C

lights should turn on. The ASP light should be off and the splice

light should turn on only when the splice passes through the coilsstation.

LED Indicator Lights

8/10/2019 Sci Tronic s 1080

29/36


5-1


Overview This section explains how to fix minor problems that occur with themetal detection system, such as detecting damaged connectors,

coils, and cables.

NOTEAny repair to the metal detection system should be done

by someone knowledgeable in electronics using a

quality oscilloscope.

No periodic maintenance is either required or recommended.

No spare parts are recommended. Replacement indicator lights,

fuses, and socket-mounted relays and ICs are standard and usually

available locally. The factory maintains an inventory of all

components in case an item is not available in your area.

A problem is indicated when the metal detector does not detect

tramp or when it alarms at random or on a splice/repair area.

The electronics in the metal detector are technically complex.

Therefore, a quality oscilloscope and knowledge of electronics are

required to correctly diagnose an electronic problem. Since the

majority of field problems consists of damaged connectors, severed

or bruised cables, and an occasional IC component failure, a

knowledgeable electrician using a volt-ohmmeter and inexpensive

ICs can correct most of the problems encountered. The information

following addresses these types of problems.

To gain access to the electronics modules, first remove the control

knobs on the cover panels using a 116-in. Allen wrench.

Maintenance

Spare Parts

Troubleshooting

Gaining Access to theElectronics Modules

8/10/2019 Sci Tronic s 1080

30/36


Diagnostic LEDs

Coil Drive Indicator L ight The coil drive indicator light turns on when the generator coil,

cable, and connectors are operating properly. When the light isnot on, the metal detector will not detect tramp metal. Check the

coil and cable for damage. Using the ohmmeter, check the cable/connector assembly for an open circuit or shorting between wires.

Power A Indicator Light When the power A indicator light is not on, the detector may stillfunction but only at half or less of normal sensitivity. Replace IC

74C221 and IC 74C00.

Power B Indicator Light When the power B indicator light is not on, the detector may stillfunction but only at half or less of normal sensitivity. Replace IC

74C221 and IC 74C00.

Power C Indicator L ight The power C indicator light should be continuously lit. If it is not,the detector may indicate false alarms. Replace IC 74C20 (two).

ASP Indicator Light The ASP indicator light flickers or turns on only whenintercepting potential alarm-causing interference. If the light

is on continuously, there may be a problem in the receiver

coil and cable system. Use the ohmmeter to check for continuity

of the coils and cable. The receiver coil resistance at theconnector with standard 25 foot cable lengths is

approximately 540 ohms 10%

Splice Indicator Light The splice indicator light turns on only when the splice coil sensesmetallic clips. When clips cannot be detected even at maximum

splice sensitivity, check the physical alignment of the coil. The

belt may have traversed out of the detection range of the coil.

5-2

8/10/2019 Sci Tronic s 1080

31/36


6-1

Tramp Metal Detects both nonmagnetic andmagnetic metals.

Sensitivity Maximum sensitivity is approximately5% of aperture height; stable to 10%

within the same sector of the aperture

location.

Conveyor Velocity Minimum: 6 ft/min (1.83 m/min).Maximum: 1,200 ft/min (365.76

m/min).

Indicators Red alarm light.Green ready light.

Alarm totalizer: electronic LCD

counter, NEMA 4. May be wired to

provide zero set from front of case.

Backlit LCD (option).

Reset Manual pushbutton switch located

between the indicator lights on theenclosure door. Jumper-wire

selectable for automatic reset. Remote

stations available.

Line Power Dual primary power transformer for240/120 V 10%; 50/60 Hz; 40 VA; 1

phase.

Fuse Protection Fuse: 1 A at 120 V: 0.5 A at 240 V.

Timed Output Contacts One single-pole double-throw (SPDT)passive contact set. 120 V at 10 A ac.


OperationalSpecifications

ElectricalSpecifications

8/10/2019 Sci Tronic s 1080

32/36


6-2

Process Control Contacts The alarm activates two sets ofpassive isolated contacts: one set is

wired normally closed and one set is

wired normally open. Specify forother contact arrangements. 120 V at

10 A ac.

Marker Contacts Timed normally open passive contactset. 120 V at 10 A ac.

Beacon/Horn Contacts One passive normally open contactset. 120 V at 10 A ac.

Spare SPDT Contacts One SPDT passive contact set.

Jumper-wire selectable for timedactivation. 120 V at 10 A ac.

Operators Relays, lights, and counter arepowered by a regulated 12 V supply

to ensure long operating life.

Socket plug-in electromechanical

relays with 2P2T and 3P2T contacts.

Relay coils rated for 12 V dc at 0.1 A.

#756 14 V dc bulb.

Controller NEMA 12 enclosureDimensions: 20 in. x 20 in. x 8 in.

(508 mm x 508 mm x 203.2 mm)

Includes lockable latch handle and

drip shield. NEMA 9, 7, and 4

available.

Control instrument and sensors rated

from 30oF to 140oF (34.4oC to

60oC). Specified for outdoor all-

weather use.

Coils Sensor coils constructed frommonolithic, impact-resistant PVC.

PhysicalSpecifications

8/10/2019 Sci Tronic s 1080

33/36


6-3

Coils Support Structure Fabricated from Extran 500 fiberglassreinforced pultrusions. Fire retardant

Extran 525 available.

Weight Controller: 60 lb (27.21 kg).

Coils Set: 40 lb (18.14 kg), 42-in.

(1,067-mm) size.

Structure: 30 lb (13.61 kg).

Cables: 5 lb (4.54 kg).

Coils Junction Box (if provided): 5 lb

(4.54 kg).

8/10/2019 Sci Tronic s 1080

34/36


6-4

8/10/2019 Sci Tronic s 1080

35/36

Section 7 Drawings

7-1

This section includes the following drawings for your metal

detection system:

1080-100-01 Wiring Diagram, Coils StationConnections (TS-1) with 3-coil flat

sensor coils

1080-100-01A Wiring Diagram, Coils StationConnections (TS-1) with 2-coil flat

sensor coils

1080-100-01B Wiring Diagram, Coils StationConnections (TS-1) with underbelt

mono coil flat

1080-100-011 Wiring Diagram, Coils StationConnections (TS-1) with 3-coil sensor

coils contoured receiver coils

1080-100-011A Wiring Diagram, Coils StationConnections (TS-1) with 2-coil sensor

coils contoured receiver coils

1080-100-011B Wiring Diagram, Coils StationConnections (TS-1) with underbelt

mono coil contoured

1080-100-011C Wiring Diagram, Coils StationConnections (TS-1) with underbelt

mono coil U-shaped

1080-100-011D Wiring Diagram, Coils Station

Connections (TS-1) with open-endedsearch coil

1080-100-02 Wiring Diagram, Transducer Connections(TS-1) with pipe coil

1080-101-01 Schematic, Power and Process ControlConnections (TS-2)

List of Drawings

Section 7 Drawings

8/10/2019 Sci Tronic s 1080

36/36


1080-101-02 Wiring Diagram and Process ControlConnections (TS-2)

1080-200-00 NEMA 12 Enclosure

1080-200-000 NEMA 4 Enclosure

1080-200-01 Coil Support Structure 3-coil flatsensor set

1080-200-011 Coil Support Structure 3-coilcontoured sensor set

1080-200-011A Coil Support Structure 3-coil

contoured sensor set

1080-200-02 Coil Support Structure Assembly

1080-200-03 Splice Detector Coil Mounting

1080-200-04 Liquid Spray Metal Marker

1080-200-05 Flag Drop Metal Marker Enclosureand Dimensions

1080-200-07 Flag Drop Metal Marker MountingLocation

___________ ________________________________

________________________________

___________ ________________________________

________________________________

___________ ________________________________

________________________________

Documents

Sci Tronic s 1080