TOMKATv2& SIGEN 2+USER GUIDE

Preparation for use : TOMKATDepress the On/Off switch to turn the unit on. Release it toswitch the unit off. When the switch is depressed the unit willemit a beeping sound.

If the TOMKAT does not emit a beep when switchedon, replace the batteries. The TOMKAT is powered by eight1.5v Alkaline AA cells, which are located in the batteryhousing on the side of the instrument.

To replace the batteries, remove the panel, push the two retainingclips towards the panel and lift it out of the casing. Remove thebatteries and fi t new ones.Switch on the instrument and ensure that the beep noise can beheard.Note: To ensure peak performance always replace the batteries as a set.

The TOMKAT is now ready for use.

1. Lift the TOMKAT so that your middle finger can operatethe On/Off switch. This leaves the forefinger free to operatethe sensitivity control and mode switch.

2. Turn the mode switch to Power Mode.3. Turn the sensitivity knob fully clockwise.

Always check for correct operation by using P mode to locate apower cable with which you are familiar and to ensure that theresponse is what you expect.

Not all cables carry current, and the TOMKAT will not detectthese in P mode. For the TOMKAT to locate cables in P mode,they must be carrying sufficient current.

Underground pipes can often emit power and radio signals.The TOMKAT cannot recognise if the service is a cable orpipe and will only indicate the presence of a service.Buried services do not always radiate a detectable signal.To locate these cables use the TOMKAT in conjunction withThe SIGEN. This is the most accurate method forlocating, tracing, and identifying a cable.

Location ProcedureSafety Warning: Although theTOMKAT will locate most services thereare some cables which do not radiate signalsand which cannot be located with theTOMKATv.Always excavate with care.

Locating

Warning: There are some cables that cannotbe detected using P mode. Once a search ofthe area has been completed in P modeperformthe search again with the TOMKAT in R mode.

Before starting to locate, consultlocal utility offices to obtain asmuch information as possibleregarding the undergroundservices in the proposed searcharea. Id available, obtain a utilitymap of the area as this will assistyou in the location of buriedservices.

When using the TOMKAT alwayshold it upright and do not swing itfrom side to side (see illustration)

Reinforcing steel bars in concrete can interrupt signals from anunderground service by spreading the signal or deflecting it. Ifyou suspect that this is happening lift the locator about 200mm(8”0) from the ground whilst locating.

To locate a cable:-

Power ModePower signals are those which are emittedby current carrying cables. The current isoften generated by nearby load carryingconductors as shown in the diagram.

Radio ModeThese are often low voltage signalsgenerated by remote radio transmitters.The signals enter the ground and are re-generated by buried conductors.

Note:These signals are not always present.

1. Switch on the instrument, select P modeand ensure the sensitivity control knob isturned fully clockwise.

2. Search the area in a grid-like fashionusing the sensitivity control knob toreduce background noise and continuesearching until there is no furtherbeeping noise from the instrument oryou are outside of the search area.

TOMKATLocator1. On/Off SwitchPress this switch to turn the uniton. Release it to switch the unitoff.

2.Mode Selector SwitchUse this switch to select therequired operating mode.The three modes are:PowerRadioGeneratorThe method of using thedifferent modes is describedlater.

3. Sensitivity Control KnobThis is used to eliminatebackground noise and minimizethe response width of theinstrument.

4. Battery HousingChange the units batteries byaccessing this panel.

5. SpeakerThe speaker allows the operator tohear signal confirmation.

6. LCD PanelTheTOMKAThas an additionalLCD display. The display givesstraight forward informationabout the Mode and Signal.

The TOMKAT and SIGEN Signal Generator combine to make the perfect tools forcable avoidance. Their rugged construction ensures long life and reliability whilst thesimple controls promote effective use with minimal training.

SIGEN - Signal Generator......................................Locating (carried on)

3. Return to the mid point of the signal and,holding the TOMKAT level, rotate it aboutits axis until the minimum signal is found.Use the sensitivity control to obtain a narrowresponse (See illustration).

4. Rotate the locator about its axis by 90˚ so thatit will be across the run of the service at thatpoint.

5. Move the locator backwards and forwardsacross the service whilst reducing thesensitivity to give a narrow response width.The locator is now directly above the serviceand at right angles to it.

6. To trace the line of the service, walk along the expecteddirection moving the locator from side to side with the blade at90˚ to the line of service. Always keep the locator vertical and,using marker paint or chalk, mark the route of the service asrequired.

7. Repeat the procedure using R mode and withthe sensitivity control turned fully clockwise.

1. Mode Switch

OFF OFF

Low output

High output

2. High & Low switch Controlsthe volume output of theSIGEN

3. UtilityCompartmentSupplied as standard withdirect connection leads and anearth stake.

L

H

InductionIn this method, the generator signal isinduced onto the cable and theTOMKAT is used to tracethe signal.

To trace a cable in induction mode,proceed as follows:1. Locate the assumed position of

the cable and mark its position.2. Place the generator over the

assumed cable position andswitch it on.

3. Switch on the TOMKAT andselect G mode. Starting at adistance of approximately 10 pacesfrom the generator trace the cableand mark its position.

Direct connectionIn this locating method the generator isdirectly connected to the cable bymeans of a cable attached to asuitable connection point such as ajunction box or meter.

Warning: Direct connections should only bemade by suitably qualified users.

Locating with the TOMKAT & SIGEN Pre-use testBefore using the TOMKAT with the generator, performa functional check as follows:

1. Place the generator on the ground and switch it on.2. Ensure there is a sound from the speaker.3. Place the TOMKAT on the ground with the foot facing

towards the generator, with the TOMKAT switched on andset to maximum sensitivity, check that there is an audioresponse.

Using the optional Signal Clamp

The Signal Clamp applies a SIGEN signal safely to the pipeor live cable of up the 100mm (4 inches) in diameter,without interrupting the supply.

MethodPlug the Signal Clamp into the SIGEN’s connection socket.Place the Clamp around the pipe or cable ensuring the jaws arefully closed. Switch the SIGEN on. Open and close theClamps jaws.

Using the optional Sonde Signal Transmitterwith the TOMKAT

The 5 Meter Sonde is a small battery powered, self-contained,waterproof transmitter which can be attached to drain rods orany movable device that can be propelled inside non-metallic pipes.

Using the optional Live Plug ConnectorThe Live Plug Connector allows the SIGEN to a bepoweredby connecting to a domestic power socket in the home orstreet.

MethodConnect the Live PlugConnector to the SIGEN,inside the accessory panelon the side and the 3 pinplug, to the domestic powersocket.Switch on the power socketand the SIGEN.

An earth connection isnot required but efficientsignal transfer is onlyachieved if the targetconductor (Cable) isgrounded at both ends.Power cables tend to beinstalled like this.

MethodAlways start a new job with fresh batteries,1. Attach theSONDE to a drain rod using the correct connector.2. Place the SONDE on the ground and set the TOMKAT to

3. Generator mode.Hold the TOMKAT in line with the SONDE and check for asignal.

4. Insert the SONDE approximately 1m/yd into the duck/pipeand adjust the TOMKAT sensitivity to receive thesignal clearly.

Ghost Signals?A ghost signal can occur when sensitivity is incorrectlyset on the TOMKAT, typically it appears before and behindthe centre of the main signal position .

To reduce the occurrence of a ghost signal, simplyreduce the sensitivity of the TOMKAT, allowing it to receiveonly the main signal emitted by the SONDE.

Peak

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