CXL3 Cable Avoidance Tool
DXL3 Depth Measuring Cable Avoidance Tool
SGA3 Signal Generator
INSTRUCTION MANUAL
CXL3 Cable Avoidance Tool
DXL3 Depth Measuring Cable Avoidance Tool
SGA3 Signal Generator
Measure-Quip Ltd make every effort to ensure that the information we provide about our products and their use is correct. We do not accept responsibility
for injury, damage, or consequential loss arising from the use of our products. Local, national and international requirements and regulations must take preference.
Copyright © 2017 Measure-Quip Ltd. All Rights Reserved.
CXL 3/ DXL3 Cable Avoidance Tool 42
Contents
General Warnings 3
Features
CXL3 Cable Avoidance Tool 4
DXL3 Cable Avoidance Tool 4
SGA3 Signal Generator 5
Locator Operating Modes
Power Mode 6
Radio Mode 7
Generator Mode 8
Using the Locator
Locator Batteries 9
Holding the Locator 10
Searching 11
Pinpointing 12
Tracing 13
Using the Signal Generator 14
Signal Generator Batteries 15
Direct Connection 16-17
Street Lighting/Furniture 18
Signal Clamp 19
Signal Injector 20
Searching 21
Tracing 22
Induction 23
Searching 24-25
Multiple Services 26
Inductive Sweep 27
Non-Metallic Pipe Tracing
Sonde 28
33kHz General Purpose Sonde Batteries 29
33kHz Duct Sonde Batteries 30
Tracing a Sonde 31-32
Plastic Pipe Tracer and Flexible Tracer 33-34
Depth Measurement
Metallic Services 35-36
Non-Metallic Pipes
- Sond e/ Plastic Pipe Tracer /Flexible Tracer 37
Function Checks
Locator Function Checks 38
Signal Generator Function Checks 39
Depth Measurement Function Checks 40
General Symbols 41
Technical Specifications
SGA3 Signal Generator 43
Maintenance
Maintenance/ Handling /Storage /Cleaning 44
Support Services
Training / Servicing/Repairs 45
GENERAL WARNINGS
ALWAYS EXCAVATE WITH CARE
C.Scope Locators detect services radiating a detectable signal. There may be some services that do not radiate a signal and cannot be located.
Do not use the equipment outside of the temperature range -10˚C to +50˚C (14˚F to 122˚F) as the batteries may cease to function adequately.
Geographical conditions such as hills and mountains may effectively screen signals and prevent a detectable Radio signal.
The Locators alone will not always locate every service. Use a Signal Generator wherever possible.
The Signal Generator leads MUST NOT be connected directly to a live service.
Beware of multiple services. The Locators will not always indicate services that are close together or one above the other.
Do not use t he equipment in areas where h azardou s gases may be p resent.
Check for underground services before using the Earth Stake.
Performance may be impaired by unusually strong electromagnetic fields.
Do not hold the Locator Loudspeaker close to the ear for extended periods.
It is recommended that the operation of the Locator and Signal Generator is regularly checked (see pages 38-40 ).
3
CXL3 and DXL3 Cable Avoidance Tools
The CXL3 and DXL3 Cable Avoidance Tools can provide precise information about the position of buried services.
The DXL3 also provides depth information. The combination of locating modes enables buried services
to be detected quickly and reliably.
On /Off Switch
Depth measurement button (DXL3 model only)
Digital display
Detachable Loudspeaker
Sensitivity Control
3 position Mode Switch:
P. Power
R. Radio
G. Generator
Battery Compartment
Replaceable Wear Foot
4
Mode selected:
G P R
Generator Power Radio
(frequency)
Depth display
(DXL3 model only)
Battery Condition Signal Strength
Indicator Bar Graph
SGA3 Signal Generator
A CXL3/DXL3 Cable Avoidance Tool should be used in conjunction with the SGA3 Signal Generator
in order to fully optimise it’s capabilities. The SGA3 has the facility of high and low output power
and can operate with a pulsed or continuous output signal.
Control Panel
Direct Connection Socket
Auxiliary Earth Lead Socket
Auxiliary 10m Earth Lead
Direct Connection Leads
Crocodile Clips
Batteries
Earth Stake
Accessory Tray
Accessory Tray Holding Clips
5
Low Power
Control
On/Off Control
High Power
Control
Loud/Mute
Control
Pulsed/Continuous
Output Control
Locator Operating Modes: Power Mode
In Power Mode the Locator detects power signals. These power signals are present on all current carrying electricity cables
although not all are detectable. Power signals may also flow along other conductors such as metal gas and water pipes,
telecom cables, metal fences and railway tracks.
Limitations of Power Mode
Not all electricity cables can be found using the Power Mode. Here are the most important examples of electricity cables
that may not be detectable in the Power Mode:
l Street lighting cables. When the lights are off, no current flows and so no power signal is created.
l Supplies to buildings or plant using very little or no electricity may not have a detectable power signal.
l Pot-ended or capped cables. These will never have any current flowing through them but are possibly still live.
l Disused or aband o ned c ables.
l A few high voltage electricity cables. These can be ‘well balanced’, electrically and therefore radiate little or no power signal.
l Direct Current cables (such as those found on railway systems). These do not create their own Power signals.
l Cables more than 3 metres (9’9”) deep.
NOTE Locator s can only detect services radiating a detectable electromagnetic signal.
There may be some services that do not radiate these signals and cannot be located.
NOTE The absence of a power signal does not mean the service is not live.
WARNING Generally these services should be detectable using the Radio or Generator Modes.
6
Locator Operating Modes: Radio Mode
In Radio Mode, the Locator detects signals from various radio transmitters. These signals flow through the ground
and will tend to follow the line of least resistance such as a buried metallic service. When this happens the service
can often be detected by using the Locator in Radio Mode.
Limitations of Radio Mode
l Not all services will be detectable in Radio Mode.
l A strong radio signal present on one service may be masking a weaker radio signal present on an adjacent service.
l It is not normally possible to determine what the service is in Radio Mode, only it’s position.
l Radio signals do not favour one utility over another.
l The depth of the buried service cannot be judged by the strength of the radio signal alone.
l Normally it is only possible to detect radio signals present on services up to 2 metres (6’6”) deep.
l A sho rt servic e may no t have enough signal to b e detected.
NOTE Locator s can only detect services radiating a detectable electromagnetic signal.
There may be some services that do not radiate these signals and cannot be located.
WARNING Most buried metallic services not found in Radio Mode should be detectable by using Generator Mode
with the Signal Generator.
7
Locator Operating Modes: Generator Mode
In Generator Mode the Locator detects conductors radiating a signal
applied by the Signal Generator or the signal radiated by a Sonde.
The Signal Generator provides a way of sending a known signal along
buried metallic services which can then be detected using the Locator.
By detecting this signal it is possible to locate, trace and identify
the pipes or cables that may be carrying it.
There are TWO basic methods by which the Signal Generator
signal can be applied to buried services:
l Direct Connection - The Signal Generator is attached directly
to the service using either the Direct Connection Leads or one
of the accessories available for use with the Signal Generator
such as the Signal Clamp or Signal Injector.
l Induction - The Signal Generator can induce a signal onto
a buried metallic service remotely from the surface without
the need to physically connect to that service.
The Limitations of Generator Mode are covered in
the ‘Using the Signal Generator’ section of this manual.
Direct Connection
Induction
WARNING Locators can only detect services radiating a detectable electromagnetic signal.
There may be some services that do not radiate these signals and cannot be located.
8
Using the Locator: Batteries
C.Scope Locators can be powered by either eight standard alkaline
or Nickel-Metal Hydride rechargeable (NiMH) AA (LR6) size batteries.
Locator Battery Check
Switch the Locator on by pulling up on the On/Off trigger positioned
on the underside of the handle. The Locator should emit a clear audible
battery check tone for one second and the display should come on.
Check the battery level indicator in the bottom left hand corner
of the display. If there is only one segment or no segments of the indicator
filled in then the batteries will need to be replaced or recharged before
locating work can begin.
Changing Locator Batteries
Push the two clips back to release the Battery Compartment door.
Remove ALL EIGHT used batteries and replace with new or recharged ones.
Be careful to insert the new batteries the correct way round in the holder.
Replace the holder in the Battery Compartment making sure that the two
terminals on the holder make contact with the two terminals within the
Battery Compartment. Close the Battery Compartment door securely.
Battery Levels OK
Replace /recharge batteries
NOTE A spare battery pack can be carried inside the Battery Compartment.
NOTE Only use alkaline or Nickel-Metal Hydride rechargeable (NiMH) AA (LR6 ) size batteries.
NOTE Dispose of the used batteries safely in accordance with local regulations.
WARNING Do not change batteries in confined spaces where gas may be present.
WARNING Do not mix old and new or different types of batteries.
9
Using the Locator: Holding the Locator
When in use the Locator should always be held upright.
Never swing the Locator such that it moves away from
the vertical.
Your middle or little finger should be used to squeeze,
and hold on, the On/Off trigger. Your index finger will
then be free to adjust the Sensitivity Control.
90º
Correct Incorrect
10
Using the Locator: Searching
There are three stages to the locating process; searching,
pinpointing and tracing.
1. Turn the Mode Switch to the appropriate mode.
2. Hold in the On/Off trigger. The Locator should emit the audible
battery test tone and the digital display should come on.
Check the battery level indicator to confirm the batteries are usable.
3. Rotate the Sensitivity Control fully clockwise to its maximum
setting as indicated by the arrow on the control.
4. Carry out the search using a grid pattern as shown in the diagram.
Walk slowly and keep the Locator upright at all times and stationary
by your side.
5. As you approach the area in which there is a signal the Locator will
emit an audible response and show a visual response on the display.
6. Keep walking until the audible and visual responses disappear.
NOTE This search technique applies only to the Power and Radio Modes. See ‘Using the Signal Generator’ for the correct
search pattern when using Generator Mode.
NOTE Sometimes the Locator will give an audible response and strong (full scale) visual response across
the whole of the search area. In this case turn the sensitivity down slightly and repeat the search using the same grid pattern.
11
Search Grid Pattern
Using the Locator: Pinpointing
Having found a signal the next step is to pinpoint the source.
The closer the Locator is to the signal source the stronger
the response.
To Pinpoint a Signal
1. Keeping the Locator vertical, walk through the area
of the signal response. If the visual response goes up
off the scale then stop and reduce the sensitivity
of the Locator slightly before continuing.
2. The width of the signal response will shrink as
the sensitivity is reduced. Once it is reduced enough
then a clear peak response will be seen on the display
as the Locator traverses the service. The Locator
is positioned directly above the buried service
when the display is at its highest (peak ) reading.
3. Carefully rotate the Locator over the peak reading until
the visual response falls to a minimum. The Locator will now
be roughly IN LINE with the direction of the buried service.
NOTE The presence of other signals in the immediate vicinity may result in the visual response not reducing to a minimum
level when the Locator is rotated over the peak response.
4. Mark the position of the buried service.
NOTE The amount of sensitivity adjustment needed to pinpoint a service can vary depending on the mode being used,
the signal strength and the service depth.
12
Using the Locator: Tracing
Having pinpointed a service it should now be possible to trace its route.
1. Carefully follow the direction of the signal holding the Locator at right
angles to the line of the signal. It is necessary to constantly ‘slice’
the Locator from side to side in order to be sure of still being over
the peak signal response.
2. Stop and mark the position of the signal at regular intervals.
As more marks are recorded the precise direction of the service
will become more apparent.
NOTE It may be necessary to readjust the sensitivity to maintain the optimum response.
NOTE After tracing, return to the original search grid to search for further buried services.
WARNING Never rush the tracing process. Small and unexpected changes in the service’s route will be missed
if care is not taken to follow the signal’s path every step of the way.
Lost Signals
This can be because of a curve, or bend in the route, change in depth
of the service, a T connection or the end of the service.
Finding Lost Signals
1. Locate in a circle at least 1 metre (3’3”) around the point where
the signal was lost. This should locate the service if it has simply
changed direction sharply or T’d into another service.
2. If you find nothing then increase the sensitivity and repeat the circle.
This should find the service if it has continued but at a greater depth.
13
Using the Signal Generator
Using the Locator in Power and Radio Modes will only allow you to locate and mark the position
of buried services that are producing a Power signal or re-radiating a Radio signal.
Use of the Signal Generator should enable most, if not all, of the remaining buried metallic
se rvices to be detect e d a nd t r aced.
This section explains the various ways in which the Signal Generator can be used.
It also shows how to use those accessories that allow the Signal Generator to be directly
connected to specific services.
Direct Connection - Physically connecting the Signal Generator to a service is the most effective
way to transfer the signal onto that service and the best way to trace the route of that service.
Signal Clamp - The Signal Clamp is an accessory that allows the Signal Generator signal
to be applied to a specific cable without having to make electrical contact with that cable.
Although the Signal Clamp is not physically fixed to the cable we still consider it as
a Connection method because it is using the Signal Generator in Connection Mode.
Signal Injector - The Signal Injector is an accessory that allows the Signal Generator
signal to be safely applied to an electrical system via a conventional 3-pin power socket.
This signal will then be detectable on the buried supply cable outside the building.
Induction - Induction is a method of applying a signal to a service to which there is no direct access.
NOTE The Locator should always be handled and operated according to the instructions
shown in the ‘Using the Locator’ section unless specifically shown otherwise in this section.
14
Using the Signal Generator: Batteries
C.Scope Signal Generators can be powered by either four standard alkaline
or by four standard Nickel-Metal Hydride rechargeable (NiMH) D (LR20) size batteries.
Signal Generator Battery Check
Switch the SGA3 Signal Generator on by pressing the On/Off Control.
The Signal Generator should emit a loud continuous tone.
If the batteries need replacing or recharging an interrupted tone will be heard.
During use, the Signal Generator will also warn the Locator user of low battery status
by altering its normal continuous or pulsed signal output to a distinct interrupted signal output.
Changing the Batteries
l Remove the Accessory Tray.
l Undo the two round knurled retaining screws situated on the underside of the Signal Generator holding the Battery Cover.
l Remove ALL FOUR used batteries and replace with new ones.
l Be careful to insert the new batteries the correct way round in the compartment as indicated on the case.
l Replace the Battery Cover being careful to not over tighten the retaining screws.
l Replace the Accessory Tray.
) size batteries.
NOTE Only use alkaline or Nickel-Metal Hydride rechargeable (
NOTE Dispose of the used batteries safely in accordance with local regulations.
WARNING Do not change batteries in confined spaces where gas may be present.
WARNING Do not mix old and new or different types of batteries.
NiMH) D (
15
LR20
Using the Signal Generator: Direct Connection
WARNING Never connect directly to electrical services.
WARNING You may need to seek permission from the service owners before connecting on to some buried services.
The Direct Connection Leads and Earth Stake that are supplied
with the Signal Generator are used to apply a signal to any metal pipe
at a suitable access point such as a valve, hydrant point, stop cock
or exposed pipe length.
1. Plug the Direct Connection Leads into the Signal Generator
Connection Socket.
2. Attach the red lead to the pipe at your point of access using
the Crocodile Clip. Ensure that you have a secure and clean grip
on the pipe with the Crocodile Clip.
3. Turn the Signal Generator on.
4. Place the Earth Stake in the ground (having first searched the area
for buried cables with the Locator ).
The ideal position for the Earth Stake is at right angles to the assumed
line of the pipe and the full length of the Direct Connection Leads away
from the pipe access point.
NOTE The type of metal that the pipe is constructed from or its use will have little effect on its traceability.
NOTE If it is not possible to get the Crocodile Clip to grip the pipe then use the Magnet on the back of the clip.
1.
2.
16
Using the Signal Generator: Direct Connection
5. Connect the black Earth Lead to the Earth Stake
(or an alternative earth point). If your earth point
is too far away from the pipe access point for
the black Earth Lead to reach then use the
yellow 10 metre Auxiliary Earth Lead instead.
6. As the Earth Lead is connected to the Earth
Stake the audible signal from the Signal Generator
should change in pitch. The lower the pitch,
then the better the signal will be on the metal pipe.
If there is no change in pitch it may be that
some dirt, rust or paint on the pipe is preventing
the Crocodile Clip or Magnet from making a good
contact with the pipe. Alternatively it may be that
your earth point is at fault. Change the position
of the Earth Stake or use an alternative earth point.
NOTE If it is not possible to use the Earth Stake use a nearby metal fence post, manhole cover or gully cover.
NOTE If the Earth Stake cannot be inserted into the ground then simply laying it flat on the ground can sometimes
provide a successful earth connection (especially if the ground is wet).
DO NOT use something that may have another metallic service attached to it, such as a metal street lighting column.
NOTE If the Signal Generator pitch does not change then there is no signal being transferred onto the service.
17
Using the Signal Generator: Direct Connection to street furniture
Direct Connection to a Street Lighting Column
or other street furniture
The best method to determine the position and route
of street lighting, car park lighting cables or any other
item of street furniture with a power supply is by using
a Signal Generator and the pipe connection method.
Follow the same rules as for connecting the Signal
Generator to a metal pipe except attach the red
Direct Connection Lead to a metal part of
the OUTSIDE of the lamp column/ street furniture.
WARNING NEVER open the lamp column door to gain access to the cables, this is potentially dangerous
and is not necessary.
NOTE Make sure that the Direct Connection Crocodile Clip or Magnet is not insulated from the metal of the column by paint.
NOTE If the column is concrete attach the Crocodile Clip or Magnet to the metal surround of the access door.
18
Using the Signal Generator: Signal Clamp
Signal Clamp
1. Plug the Signal Clamp into the Connection Socket
on the Signal Generator.
2. Turn the Signal Generator on.
3. Check that the jaws of the Signal Clamp are clean.
Place the Signal Clamp AROUND the cable making sure that the jaws
are able to fully close. The audible signal from the Signal Generator
should drop in pitch indicating that the jaws have closed correctly.
WARNING NEVER attempt to place the Signal Clamp around electricity cables
that are deliberately suspended out of reach. They may be unsheathed or unprotected cables.
NOTE The Signal Clamp cannot apply a signal to a cable that is not earthed at both ends such as abandoned cables
that have been cut off where they appear above ground or cables supplying unearthed equipment.
19
Using the Signal Generator: Signal Injector
Signal Injector
1. Plug the Signal Injector into the Connection Socket
on the Signal Generator and an electric outlet.
2. Turn the Signal Generator on .
3. Turn the socket on. The audible tone from the Signal Generator
will drop in pitch to indicate a successful connection.
NOTE On two wire Protective Multiple Earth (PME ) systems it may be necessary to also
provide an external earth using the yellow 10 metre Auxiliary Earth Lead and Earth Stake.
NOTE Using the Signal Injector may cause the system protection to trip.
NOTE Always check with the owners that it is acceptable to interrupt the supply before connecting the Signal Injector.
WARNING DO NOT use the Signal Injector on systems with voltages in excess of 240 volts AC.
Domestic systems will normally be below this voltage.
20
Using the Signal Generator: Searching for the Direct Connected Signal
The search pattern used to find the Signal Generator signal when applied
by a direct connection method (Direct Connection Leads, Signal Clamp
or Signal Injector ) is different to the normal search pattern used on
Power or Radio Modes.
1. Move a few paces away from where the Signal Generator has been
connected to the service. Turn the Mode Switch to Generator Mode.
Hold the Locator so that the side of the Locator is facing towards
the Signal Generator.
2. Adjust the sensitivity so that the Locator is just showing a visual
response and just emitting an audible response.
3. If possible walk in a complete circle around the connection
point trying to keep the same distance from this point at all times.
When a signal is detected, ‘pinpoint’ that signal as shown
in the ‘Using the Locator’ section.
4. Having pinpointed the first signal, do not readjust the Sensitivity
Control but continue with the circle to see if any other signals
are detected. If more signals are detected compare the strength
of each signal by observing the bar display. The strongest signal
will usually be coming from the service that the Signal Generator
is connec ted to.
21
Using the Signal Generator: Tracing the Direct Connected Signal
The tracing technique used to follow the Signal
Generator signal when applied by a direct connection
method (Direct Connection Leads, Signal Clamp
or Signal Injector ) is almost exactly the same as
the normal tracing technique used on Power or Radio
Modes except that the signal that the Locator
is detecting will get weaker the further away from
the Signal Generator that you go. It will be necessary
to regularly adjust (increase ) the Locator Sensitivity
Control to compensate for this.
NOTE It is not possible to search for the signal above any leads connecting the Signal Generator to the service
or above the Earth Lead connected to the Earth Stake.
22
Using the Signal Generator: Induction
This is the standard method for inducing signals onto buried metallic
services. It produces a strong signal directly below the Signal Generator
but the signal strength drops off quite quickly either side of the Signal
Generator.
1. Check that there are no accessories plugged into the Connection
Socket. The Signal Generator switches automatically to Induction Mode
when the socket is unus ed.
2. Place the Signal Generator upright on the ground where you suspect
the services are buried. Make sure the Signal Generator is in line with
the expected route of these services.
3. Turn the Signal Generator on and check that the batteries are OK.
4. The signal will be radiated into the ground immediately below and for
approximately 3 metres (10’) either side of the Signal Generator.
NOTE The closer the Signal Generator is to the position of the buried service then the stronger the signal will be
on that service.
NOTE Only metallic services that are approximately in line with the Signal Generator orientation will be energised
with a signal. Metallic services that are crossing the line of the Signal Generator will NOT be energised.
21
23
Using the Signal Generator: Searching for an Induced Signal
The search pattern used to find the Signal Generator signal
when applied by Induction Mode is slightly different
to th e se arch patte rn used on other mode s.
1. Move AT LEAST 10 metres (33’) away from the Signal Generator
position with your Locator. This is to avoid the Locator picking
up the airborne signal rather than the signal induced onto
the buried service.
2. Stand so that you are roughly in line with the end
of the Signal Generator and hold the Locator so that
the side of the Locator is facing towards the Signal Generator.
3. Select Generator Mode.
4. Adjust the sensitivity so that the Locator is JUST showing
a visual response and emitting an audible response.
NOTE A Signal Generator will transmit a significant amount of signal into the air as well as into the ground.
NOTE Make sure you keep the Locator upright at all times to reduce the risk of picking up the airborne signal.
24
10m (33’)
Using the Signal Generator: Searching for an Induced Signal
5. Walk in a straight line across the end line of the Signal Generator.
When a signal is detected ‘pinpoint’ that signal as shown in
the ‘Using the Locator’ section.
If no signal is found move the Signal Generator 5 metres (16’)
and try again. Continue this procedure moving the Signal Generator
in 5 metres (16’) steps, following a grid pattern, until a signal
can b e fo und.
6. It may be possible to increase the strength of the induced signal on
the buried service by improving the positioning of the Signal Generator.
Once the buried service has been pinpointed, moving the position
of the Signal Generator from side to side will give an increase or
decrease in the Locator response. Remember, the closer the Signal
Generator is to the position of the buried service then the stronger
the signal will be on that service.
NOTE The Signal Generator signal that the Locator is detecting will get weaker the further away from the Signal Generator
that you go. It will be necessary to regularly adjust (increase ) the sensitivity to compensate for this.
25
Using the Signal Generator: Induction: Multiple Services
It is important to check for the presence of adjacent services running
close, or parallel, to the service that you have already located.
1. Check that there are no accessories plugged into the
Connection Socket.
2. Turn the Signal Generator on and check that the batteries are OK.
3. Place the Signal Generator on the ground on one side over
the previously located service. That service will not have a signal
induced onto it.
4. Re-scan the area looking for another peak signal close to where
the original signal was found. This operation should be repeated until
you are satisfied that no further services can be located.
NOTE The signal will be radiated up to 3 metres (9’9”) either side of the Signal Generator but NOT directly below
when the Signal Generator is on its side.
Limitations of Induction Method - There are limitations concerning what can be achieved when using a Signal Generator
on the Induction Mode compared to the Connected Mode. It is not normally possible to identify what the service is that has been
detected with an induced signal. If the signal can be followed far enough, a visible feature such as a valve cover or cable pit cover
may be found that can indicate the identity of the service.
Cables with a very small cross section may not have enough signal induced onto them to make them detectable.
It is often not possible to apply an induced signal onto just ONE specific buried service, in order to trace it alone,
when other services are positioned in a close proximity.
NOTE An induced signal cannot be applied to a buried service that lies beneath reinforced concrete. The reinforcing bars
will re-radiate the induced signal masking any signal that has been induced onto the buried service below.
26
Using the Signal Generator: Using an Inductive Sweep
If a large area needs to be searched for buried services then
an ‘Inductive Sweep’ could be used. It is an ideal method
for detecting the position of buried services as they cross
the boundary of a large site.
An Inductive Sweep requires two people; one to operate the Locator
and one to position the Signal Generator.
1. Stand about 10 metres (33’) apart.
2. The first person holds the Signal Generator, switched to it’s lowest
Output Power Level, close to the ground and ‘end on’ (see diagram)
whilst the other holds the Locator switched to Generator Mode.
3. Adjust the sensitivity so that the Locator is just showing a visual
response and emitting an audible response.
4. Together, slowly walk across the site, staying the same distance
apart and being careful to keep in line with each other. When the
Signal Generator gets close to a buried metallic service the signal will
be induced onto it and you should see this in the increased response
on the Locator.
5. Immediately tell your colleague to stop and place the Signal
Generator on the ground at that point. Now you can pinpoint
the service and trace out it’s route. Continue the sweep across
the length and width of search area.
NOTE It is important to maintain the same distance and between the Locator and Signal Generator at all times.
NOTE Only metallic services that are approximately in line with the Signal Generator orientation will be energised with a signal.
Metallic services that are crossing the line of the Signal Generator will NOT be energised.
27
10m (33’)
Non-Metallic Pipe Tracing using a Sonde
Non-metallic pipes such as sewers or drains, service ducts, plastic gas and water pipes are not electrically conductive
and so will not be detectable using a Locator on Power or Radio Modes. It is also impossible to apply a detectable
Signal Generator signal to the non-metallic pipe or, for that matter, to the water or gas within that pipe.
If access can be gained into these pipes then a C.Scope Sonde, Plastic Pipe Tracer or Flexible Tracer
should make it possible to determine their position and route.
Sondes
The C.Scope 33kHz General Purpose Sonde and Duct Sonde are small, battery powered, waterproof transmitters that can
be inserted into a pipe, such as a sewer, drain or cable duct. The position of the Sonde (and therefore the location of the pipe)
can be pinpointed by using the Locator switched to Generator Mode.
The Sonde is inserted into and then moved along the pipe to the point at which the pipe needs to be located.
This is normally done by fitting the Sonde to drain rods. Alternatively, the Sonde can be attached to a continuous
fibreglass duct rodder, jetter hose or camera inspection system.
l The 33kHz General Purpose Sonde can be used in pipes as small as 5 0mm (2”) in diameter and up to 4.5metres (14’9”) deep.
l The 33kHz Duct Sonde can be used in pipes as small as 3 0mm (1.1”) in diameter and up to 4.5 metres (14’9”) deep.
General Purpose
NOTE Only the
Other frequency Sondes will not be detectable using the CXL3 and DXL3.
NOTE A
33kHz
33kHz
Sonde will NOT transmit a signal through a metal pipe.
Sonde
28
can be used with the
Sonde
Duct
33kHz
and
CXL3
and
DXL3
Locators.
Non-Metallic Pipe Tracing using a Sonde: Batteries
33kHz General Purpose Sonde
The General Purpose Sonde is powered by a single standard alkaline
or Nickel-Metal Hydride rechargeable (NiMH) AA (LR6) size battery.
1. To turn the Sonde on, separate the two halves of the Sonde casing.
Insert a new battery into the battery compartment with the positive end down.
2. Screw the two halves of the Sonde together being careful not to over tighten
them. The Sonde is now transmitting a signal.
3. To turn the Sonde off the battery must be removed or reversed.
NOTE Only use an alkaline or Nickel-Metal Hydride rechargeable (NiMH) AA (LR6) size battery.
NOTE Dispose of the used battery safely in accordance with local regulations.
NOTE Always use a new battery in a Sonde if you expect to take a long time to trace the pipe or duct route.
+
-
----
WARNING The Locator must always be set to Generator Mode when using the Sonde.
29
Non-Metallic Pipe Tracing using a Sonde: Batteries
33kHz Duct Sonde
The Duct Sonde is powered by a single AAA (LR03) size alkaline battery.
Rechargeable batteries are not recommended for this product.
1. To turn the Duct Sonde on, use a large flat bladed screwdriver to unscrew
the battery cover located within the hollow end of the Sonde casing.
Insert a new battery into the battery compartment with the positive end down.
2. Replace the battery cover fully using the screwdriver to secure.
The Duct Sonde is now transmitting a signal.
3. To turn the Sonde off the battery must be removed.
NOTE Only use an alkaline battery.
NOTE Dispose of the used battery safely in accordance with local regulations.
NOTE Always use a new battery in a Sonde if you expect to take a long time to trace the pipe or duct route.
+
-----
WARNING The Locator must always be set to Generator Mode when using the
30
Sonde.
Non-Metallic Pipe Tracing using a Sonde: Tracing a Sonde
The technique used to determine the position of a Sonde is always
the same irrespective of which Sonde is being used.
Before inserting the Sonde into the pipe it is best to set up the Locator
so that the Sensitivity is correctly adjusted to suit the pipe depth.
This is much easier to do when the Sonde is visible at the bottom
of the manhole rather than already some distance up the pipe.
The blade of the Locator must be held IN LINE with the Sonde
at all times.
1. Turn the Locator to Generator Mode. Check the Battery Level
Indicator to confirm the Locator batteries are usable.
Replace if necessary.
2. Keeping the blade of the Locator in line with the Sonde,
move the Locator backwards and forwards over the length
of the Sonde. Adjust the Sensitivity until a clear peak response
is shown on the display as the Locator passes directly over
the position of the Sonde.
NOTE This is at 90 degrees to the way in which the Locator is held for most other locating tasks.
Still keeping the blade of the Locator in line with the Sonde, now move
the Locator from side to side over the position of the Sonde. A similar
peak resp onse should be seen o n t he displ ay as the Locator passes
directly over the position of the Sonde. The Locator is now set up
ready for tracing the Sonde.
3. Pu sh t he Sonde up the pipe .
31
Non-Metallic Pipe Tracing using a Sonde: Tracing a Sonde
4. With the Locator turned on, walk from the pipe access
point in the direction that the Sonde was pushed. A strong
peak signal directly over the Sonde should be detected with
two lesser ‘ghost’ signals found, one in front of and one
behind the Sonde’s true position. These ghost signals
are always weaker than the main signal and should
not be mistaken for the true Sonde signal.
5. Pinpoint the Sonde’s exact position by moving the Locator
first backwards and forwards and then from side to side
to ge t th e peak respon se o n bo th occasio ns.
6. Push the Sonde further up the pipe and repeat
the pinpointing process.
Se e P a ge 3 7 f o r de pth measur ement using a Sonde .
ghost
signal
true
signal
ghost
signal
32
Non-Metallic Pipe Tracing: Plastic Pipe Tracer s / Flexible Tracer
The Plastic Pipe Tracers and Flexible Tracer can
be used in small diameter non-metallic pipes that
normal Sondes cannot fit into. Two methods
of detecting and tracing can be used: line tracing
and end tracing.
For Line Tracing , the Plastic Pipe Tracer needs
to be inserted into the pipe before a signal from
the Signal Generator is applied to the length
of the Tracer. The slip-ring mechanism of the
Flexible Tracer allows the Signal Generator
to be connected before it is inserted into
the pipe.
The Signal Generator signal is applied using
the ‘Direct Connection to a metal pipe’ method.
Connect the red Direct Connection Lead to the red
terminal of the Plastic Pipe Tracer/ Flexible Tracer.
Connect the black lead to the Earth Stake. Leave
the other terminal of the Plastic Pipe Tracer/
Flexible Tracer unconnected.
WARNING Authorisation may be required before using the Plastic Pipe Tracer/ Flexible Tracer on some pipes or ducts.
7 3 7
NOTE It is important that a change of pitch is heard when making the connections to ensure that there is a detectable
signal present on the Tracer.
NOTE The Signal Generator signal is unlikely to travel the entire length of the Tracer within the pipe.
Never assume that you have located the end of the Tracer on Line Tracing Mode. Use End Tracing if required.
NOTE The Plastic Pipe Tracer and Flexible Tracer can be used inside a metal pipe or duct but the signal will transfer
onto the pipe or duct itself.
33
Non-Metallic Pipe Tracing: Plastic Pipe Tracer s / Flexible Tracer
End Tracing
The very tip of the Plastic Pipe Tracer/ Flexible
Tracer can be energised with the signal from
a Signal Generator. It is acting much like a Sonde
and offers a very reliable way of pinpointing
the position of the tip. Pipes and ducts up to
4metres (13 ’) deep can be traced.
The Signal Generator signal is applied by
connecting the red Direct Connection Lead
to the red terminal on the Tracer and the black
Earth Lead to the other terminal. As the second
connection is made a change of pitch should be
heard from the Signal Generator signal indicating
successful connection.
The tip of the Plastic Pipe Tracer/ Flexible Tracer
is then pinpointed using the same technique
as for Sonde tracing with the Locator blade
always in line with the Tracer.
WARNING Authorisation may be required before using the Plastic Pipe Tracer/ Flexible Tracer on some services.
NOTE It is important that a change of pitch is heard when making the connections to ensure that there is a detectable
signal present on the Tracer.
NOTE End Tracing is the ideal method to use to determine where the end of the pipe is but does not give the route
of the pipe.
NOTE The Plastic Pipe Tracers and Flexible Tracer do not work on End Tracing mode when inside a metal pipe or duct.
34
ghost
signal
true
signal
ghost
signal
Depth Measurement of Metallic Services (DXL3 only )
The DXL3 can be used in conjunction with the Signal Generator, Sonde, Plastic Pipe
Tracer or Flexible Tracer to indicate the depth of a buried service.
Depth cannot be measured on the Power or Radio Modes.
WARNING The depth indication MUST NOT be used to decide if mechanical
digging over the buried service is appropriate.
WARNING If the following procedure for Depth Measurement is not followed
then an inaccurate depth may be indicated.This is worse than having no depth
information at all.
1. The Signal Generator must be set to ‘Continuous’ signal output, not ‘Pulsed’ output.
2. It is vital that the signal being measured is a good quality signal. This is best achieved
by using the Signal Generator in Connected Mode rather than Induced Mode.
3. Set the Locator to Generator Mode and pinpoint the position of the buried service.
Make sure the Locator is directly over the buried service and at right angles to it’s route.
Rest the Locator on the ground with the body vertical.
WARNING If the pinpointing of the service is inaccurate then the Depth Measurement will be inaccurate.
NOTE A poor quality signal is indicated by an unstable visual response on the Locator.
Depth Measurement may be inaccurate in these circumstances.
35
Depth Measurement of Metallic Services (DXL3 only )
4. Press and hold down the depth button. The depth will be shown on the display,
measured in metres.
5. The depth can be verified by lifting up the Locator whilst keeping the depth button
depressed. The depth indication should increase by the same amount that the Locator
has b een rais ed.
Limitations of Depth Measurement
There are some situations where it is not possible to gain accurate depth information:
l A curve or bend in the route of the service.
l Close to where the service changes in depth.
l Near to a ‘T’ junction in the service.
l At the very end point of a service.
l At any point where the signal has coupled onto an adjacent service.
l Close to any large metallic objects such as metal fences or vehicles.
l Within 25 metres (82’) of the position of the Signal Generator if used on Induction Mode.
l Under reinforced concrete.
l The signal is of poor quality.
l Too close to the Signal Generator or leads if used in Connected Mode.
Depth Measurement: Error Readings of Metallic Services
The Locator may show the following error codes when attempting a Depth Measurement:
1. 000 - The metallic service is too shallow for the Locator to obtain an accurate depth,
less than 0.2m (8inches). It should be possible to calculate the depth by raising the Locator a set amount
and then carrying out the Depth Measurement again.
2. 888 - The metallic service is too deep for the Locator to measure its depth or there is no signal at all present.
3. LO - The signal is not strong enough for the Locator to give a reliable depth measurement.
4. OL - Overload. The signal is too strong for the Locator to give a reliable depth measurement.
NOTE The depth shown will be to the centre of the service and is not the depth of cover.
This is of greater significance on large diameter pipes. Reading is to the nearest 0.05m. Range is 0.2m to 3.0m (8” to 10’).
36
Depth Measurement of Non-Metallic Pipes
using Sonde s/ Plastic Pipe Tracer s/ Flexible Tracer (DXL3 only)
NOTE The following instructions apply equally to all Sondes, Plastic Pipe Tracers and the Flexible Tracer in End Tracing Mode.
1. Pinpoint the exact position of the Sonde or Plastic Pipe Tracer /Flexible Tracer tip.
Take care to ensure that you are not over one of the two ‘ghost’ signals in front of and behind
the true position.
2. Rest the DXL3 on the ground, keeping it vertical and IN LINE with the Sonde or Tracer tip.
3. IMPORTANT. Push the depth button TWICE and hol d on the second push, to select
Sonde Depth Mode. The word ‘SONDE’ will flash on the display and the depth will then
be displayed (see picture). If the word ‘SONDE’ is not displayed then the depth reading
will not be accurate.
NOTE The depth shown is that of the
Depth Measurement: Error Readings of Non-Metallic Pipes using Sondes/Plastic Pipe
Tracer s/Flexible Tracer
The Locator may show the following error codes when attempting a Depth Measurement
to a Sonde or the tip of a Plastic Pipe Tracer or Flexible Tracer:
1. 000 - The Sonde/Plastic Pipe Tracer/Flexible Tracer is too shallow for the Locator
to obtain an accurate depth, less than 0.8m (31inches). It should be possible to calculate
the depth by raising the Locator a set amount and then carrying out the Depth Measurement again.
2. 888 - The Sonde/ Plastic Pipe Tracer/Flexible Tracer is too deep for the Locator to measure its depth
or there is no signal at all present.
3. LO - The signal from the Sonde/Plastic Pipe Tracer/Flexible Tracer is not strong enough for the Locator
to give a reliable depth measurement.
4. OL - Overload. The signal from the Sonde/Plastic Pipe Tracer/Flexible Tracer is too strong for the Locator
to give a reliable depth measurement.
Sonde
and NOT of the pipe.
37
CXL3 and DXL3 Locator Function Checks
It is recommended the following checks are carried out regularly:
Battery Condition
Check the Locator battery condition by depressing the On/Off Switch beneath the handle. The display will show at least two solid
segments if the batteries are OK. Ensure power on tone is heard.
Power Mode
Select Power Mode. Set sensitivity fully clockwise and point the base of the Locator at a fluorescent light from a distance
of 1metre (3’). Switch the light on. A loud tone should be heard and the display should read greater than 50% full scale.
Reducing the sensitivity should cause the displayed reading to reduce and the tone to cut out.
Radio Mode
Select Radio Mode. Set the sensitivity fully clockwise and, from a distance of less than 0.25metres (10”), point the base
of the Locator at a metal conductor of length greater than 100metres (330’), for example a metal pipe or cable.
A warbling tone should be heard. The display should read greater than 50% full scale.
Generator Mode
Locate an outdoor test area that is free from overhead and underground cables and metal pipes. The area should also not be near
fences, steel framed buildings, or on reinforced concrete. Place the Signal Generator on the ground and switch on - a tone should
be heard. Set to Continuous and ensure lowest Output Power is selected.
With the Locator in the orientation shown, select Generator Mode. Rotate sensitivity fully clockwise. The results in the table below
should be indicated. Reducing the sensitivity should cause the displayed reading to reduce and the tone to cut out.
Generator Mode Check
10m (33’)
NOTE These Function Checks are approximate only. If a deterioration in performance is suspected for any reason,
the equipment should not be used. It should be returned to C.Scope or a C.Scope Authorised Service Centre
for more thorough investigation.
DISTANCE MODE AUDIO METER
6m (20’) Generator Present Full scale
12 m (40’) Generator Less than at 6 m (20’) Less than Full scale
38
SGA3 Signal Generator Function Checks
Battery Condition
Turn the Signal Generator on. Good batteries will be indicated by a loud, clear audio tone.
Bad batteries give an interrupted audio tone.
Induced Mode
This can only be checked in conjunction with a Locator as described on the previous page. If the unit does not meet
the performance expected, repeat the test with another Locator to determine whether the Signal Generator is at fault.
Connected Mode
Set the minimum Output Power Level, insert the Direct Connection Lead and the 10 metre Auxiliary Earth Lead
and then connect the red lead Crocodile Clip to the Auxiliary Earth Lead Crocodile Clip. The pitch should change
to a low tone.
The leads should be arranged to create an open loop on the ground of approximately 1 metre (3’) in diameter.
Check that a signal can be detected by the Locator in Generator Mode when pointed closely at the loop.
NOTE These Function Checks are approximate only. If a deterioration in performance is suspected for any reason,
the equipment should not be used. It should be returned to C.Scope or a C.Scope Authorised Service Centre
for more thorough investigation.
39
Depth Measurement Locator Function Checks (DXL3 only)
Depth Measurement
An area clear of services and metal structures should be chosen (beware of reinforced concrete car parks).
A search with the DXL3 in all modes will help confirm the absence of other services. An insulated cable
or wire (not supplied) over 20metres (70’) is laid out on the ground and the far end connected to a ground
stake and earthed. The near end is connected to the red Direct Connection Lead.
The black Earth Lead should be laid at right angles to the 20 metre (70’) cable and earthed at the far end
with the Earth Stake. The plug should be inserted in the Direct Connection Socket of the Signal Generator.
The Signal Generator is turned on to the lowest Output Power Level and Continuous Mode. The Locator
should then be held vertically above the longer cable, approximately midway along it and the depth can
then be measured. It is best to make a few readings at different depths.
10m (33’)
NOTE These Function Checks are approximate only. If a deterioration in performance is suspected for any reason,
the equipment should not be used. It should be returned to C.Scope or a C.Scope Authorised Service Centre
for more thorough investigation.
40
10m (33’)
General Symbols
Warning - Refer to manual.
Waste electrical products should not be disposed
of with household waste. Please recycle where
facilities exist. Check with your local authority
or retailer for recycling advice.
(In the UK visit www.recycle-more.co.uk )
Conforms to EC safety requirements.
Tested to harmonised standards.
Some restrictions on use in some EC countries.
Contact Local Authorities.
Double Insulated.
41
CXL3 and DXL3 Locators Technical Specifications
Controls On/Off Switch: Spring loaded trigger switch under handle
Audio Indication Removable and user replaceable loudspeaker module
Visual Indication Multi-segment Liquid Crystal Display indicating:
Construction Case moulded from high impact plastic. Designed to withstand 1m (3’3”) drop onto a hard surface
Weight (including batteries) 2.9kg (6 pounds 6 ounces)
Dimensions 720mm x 270mm x 63mm (28.3” x 10.6” x 2.4”)
Performance Locate Accuracy: better than 10% of depth
Battery Type Internal 8 x ‘AA’ (LR6) cells (either alkaline non-rechargeable or NiMH rechargeable)
Battery Life 40 hours intermittent use at 20ºC (68ºF) using alkaline cells
IP Rating 65
Note
Performance figures stated can be affected by site parameters such as ground conditions, temperature, and strong electromagnetic fields.
Specification may be subject to change.
All C.Scope Locators are in compliance with the essential requirements and other relevant provisions of Council Directive 2014/30/EU.
Compliance has been demonstrated by testing representative samples to the relevant harmonised standards.
All C.Scope Locators comply with the RoHS directive, 2011/65/EU.
Function Select Switch (Three position): P – Power Mode; R – Radio Mode; G - Generator Mode
Sensitivity Control
Depth Button: Push button for live display of depth - DXL3 only
Signal Strength; Mode selected; Battery Condition;
Depth Measurement (in Generator Mode) - DXL3 only
Depth Accuracy: ±5% @ 1m (3’3”) - DXL3 only
Depth Measurement Range: Line 0.2m to 3m (8” to 10’)
Depth Resolution: Line 0.05m
Depth Measurement Range: So nde 0.85m to 4.5m (2’9” to 15’) - depending on Sonde type
Depth Resolution: Sonde 0.15m
42
SGA3 Signal Generator Technical Specifications
Controls All operation is by push button control as follows:
Power Level: 2 available power levels via High and Low Power buttons
Pulse/Co ntinuous Outpu t: togg les between puls e or continuous output using one push b utton
Audio/Mute: toggles between high or low level audio output using one push button
Audio Indications Audio Feedback on button push
Audio pitch drops with increasing load current in Connected Mode
Audio pitch changes with power level in Induced Mode
Audio output pulses to indicate Pulsed Mode
Low battery indicated by interrupted Audio and output signal
Output Induced = 32,768Hz
Con necte d = 32,768Hz
Carrier Pulse Frequency: 7.5Hz (pulsed mode)
Audio Pulse frequency: 3.75Hz (pulsed mode)
Connected Mode Connection Mode automatically selected when lead is plugged into socket
Maximum Output Voltage (open circuit): 20V rms
Maximum Output Current (short circuit): 18mA rms
Maximum Power: 320mW into 1000Ω load
Construction Case moulded from high impact plastic. Designed to withstand 1m (3’3”) drop onto a hard surface
Incorporates clip on Accessory storage compartment
Weight (including batteries, Connection Leads and Earth Stake) 3.4kg (7 pounds 7 ounces)
Dimensions (with Accessory storage compartment) 360mm x 180mm x 230mm (14.1” x 7” x 9”)
Battery Type Internal 4 x ‘D’ (LR20) cells (either alkaline non-rechargeable or NiMH rechargeable)
Battery Life up to 40 hours intermittent use at 20ºC (68ºF) using alkaline cells
Note
Performance figures stated can be affected by site parameters such as ground conditions, temperature, and strong electromagnetic fields.
Specification may be subject to change.
All C.Scope Signal Generators are in compliance with the essential requirements and other relevant provisions of Council Directive 2014/53/EU.
Compliance has been demonstrated by testing representative samples to the harmonised standards EN300-330 and EN301-489.
The essential radio test suites have been carried out and the equipment is in conformity with all applicable directives.
All C.Scope Signal Generators comply with the RoHS directive, 2011/65/EU.
On/ Off
43
Maintenance
Handling
C.Scope Locators and Signal Generators are rugged
instruments designed for the rigours of every day use.
However, to ensure that the specified accuracy is maintained,
it is essential to treat the instruments with care by avoiding
shocks, vibration and excesses of temperature.
The construction of C.Scope Locators and Signal Generators
incorporate weather proof seals, however, they are not
guaranteed to prevent water ingress if the equipment
is immersed.
Cleaning
Th e eq uipment can be clean e d wi th a spo n ge d ampened
with warm water. A mild soap may be used if required.
The use of solvents should be avoided.
Do not allow moisture in the battery compartments or near
the connectors.
Storage
The equipment should be stored in a clean and dry
environment. The temperature should not exceed the range
-10˚C to +50˚C (14˚F to 122˚F). If stored for long periods
the batteries should be removed.
44
Support Services :
Trainin g/ Servicin g/ Repairs
Training
This Instruction Manual is comprehensive but cannot fully
replace expert tuition. Excellent training is available directly from
C.Scope and via authorised C.Scope agents, cost effectively,
at your chosen location. C.Scope recommend operators are
trained before using the equipment.
Servicing
It is strongly recommended that the CXL3 and DXL3 Locators
and the SGA3 Signal Generator are serviced at least once
a year by an Authorised Service Centre to ensure performance
to specification. Contact your supplier for information.
Repairs
Before returning equipment suspected of being faulty, please
check the machine carefully with a fresh set of batteries.
Check the battery connections and rotate the batteries in
the holder. Refer to the section in this manual on Function
Checks and if possible substitute known good equipment as a
confirmation. If the problem persists then contact the company
from whom you purchased the equipment, or contact C.Scope
indicating the nature of the fault. Advice on the best course of
action can then be given.
45
Measure-Quip Ltd
Merlin Way
Quarry Hill Industrial Estate
Ilkeston
Derbyshire
DE7 4RA
Tel: 0115 9440399
Email: hello@measure-quip.com
Web: measure-quip.com
CSCOPE CXL3 DXL3 SGA3 Instruction Manual - Part no. B1093E Issue 1
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