RADIODETECTION APPLICATIONS MANUAL

1 RADIODETECTIONAPPLICATIONS MANUALR evision 0 - APPLICATIONS ManualCONTENTS1 INTRODUCTION2 HOW TO USE A AND ACTIVE A CABLE OR PIPE3 HOW TO USE A CONNECTION4 HOW TO LOCATE AND WITH A PRECISION A CABLE OR CABLE PLUG CONNECTOR5 HOW TO MEASURE FOR MEASURING MEASUREMENT TO MEASURE DEPTH USING TRIANGULATION6 HOW TO MEASURE OF CURRENT FOR MEASURING AND INVESTIGATING PIPELINE COATING CONDITION7 HOW TO USE CURRENT DIRECTION (CD)8 HOW TO FAULT FIND WITH AN A-FRAME9 HOW TO USE A SUITABLE THE THE A DRAIN BLOCKAGE OR SMALL DIAMETER DRAINS OR PLASTIC WATER LEAKS IN PLASTIC IRON GAS PIPE A POSITION EACH SIDE OF A BLOCKAGES CABLE A HORIZONTAL BORING INSPECTION CAMERAS10 GLOSSARYR adiodetection APPLICATIONS ManualRadiodetection APPLICATIONS ManualPage REPORT1 INTRODUCTIONGENERAL USEThe RADIODETECTION locator (comprising a Transmitter and aReceiver) is designed for locating buried lines.

2 Although simple, itis often used to define complex locating problems in confusedsituations which is the reason for the large variety of possibleways of using the equipment. Information in this ApplicationsManual combined with field experience will help select the mostsuitable method to obtain the best site plans or contacting the local utilities before locatingis mandatory in some areas and is always advisable. Althoughthe information obtained may not be accurate or complete, itusually warns what to large number of optional accessories are available forRadiodetection locators to increase their usefulness and to widentheir knowledge of the theory of electromagnetic principles is useful,helping the user to take full advantage of the locator and torecognise its limitations.

3 Locator users are advised to readRadiodetection's publication 'The Theory of Buried Pipe and CableLocation'.SAFETYSafe working on site is always the first priority and must never beneglected. Local and Company safety procedures should bestrictly adhered to when using RD there are situations when it is not possible to pinpointa target, identify a line or provide correct information about aburied line. Experience will help the user decide on the quality ofinformation obtained using the locator. This information can oftenbe corroborated with aids from the site, visual indications ofburied plant, site or system drawings doubts about precision or the correctness of locatinginformation must always be included in reporting or staking CAREWith the exception of the batteries, the locator has no parts whichneed regular replacement or servicing.

4 If an instrument requiresmaintenance, please refer to RADIODETECTION for details of localrepair TestingIf the locator is to be used for safety APPLICATIONS such as cableavoidance, it is good practice to undertake regular checks toconfirm correct best and most reliable technique is to undertake a 'street' yourself with the instrument and use it to detect somecables at convenient locations close to the workshop or one or two sites where the Power and/or Radio signalsgive consistent response and use these as benchmark test , try to find sites where the Power/Radio signal is relativelyweak, where the line can only be found with the sensitivitycontrol at, or near.

5 Maximum - any significant loss of performancecan then be readily APPLICATIONS ManualPage ,SDTxHPTx,HCTxLCTxHCTx-2 Quantity12101048 DescriptionAA *D CodeLR6LR6/LR20LR20LR20LR20 MalloryAAAA/DDDDD uracellMN1500MN1500/MN1300MN1300 MN1300 MN1300 Fuji53005300/5100 510051005100 USA -EverReadyE91E91/E95E95E95E95* AA cells are a low cost option for STx and SDTx CheckA reliable, accurate depth measurement is only certain when agood active signal is present on a single line. There must be nosignificant signal on adjacent lines and the target line must bestraight and without tees for about ten paces to either side of theReceiver.

6 Also, depth will not be accurate if measured within 30paces range of a Transmitter in the induction a suitable line (without the previously mentioned problems) isavailable whose depth is known at a particular point, use it as abenchmark test site to undertake regular checks. Alternatively, anabove ground test loop can be an area known to be free of buried pipes/cables and out a test loop as illustrated. It can be used to verify depthaccuracy in the range 20 cm (8 in.) to 2 m ( ft).CleaningDo not use solvents for cleaning.

7 If it is necessary to remove mudor grime, use a sponge dampened with warm water. A mild soapmay be used to loosen ingrained wipe the moving coil meter or LCD window with ananti-static Transmitters and Receivers incorporate weather-proof sealsbut they are not guaranteed to prevent ingress of water recommends the use of Alkaline Manganesebatteries. Cheaper Zinc Carbon batteries can be used but have amuch shorter life (possibly 25% of Alkaline Manganese batteries).Never change just some of the batteries - all or nothing is the the correct battery polarity.

8 The instruments areprotected against being damaged by incorrect Transmitter batteries are fitted inside two reducer , the tubes can be discarded and the High PowerTransmitter battery types can be used. This does not increaseoutput power but gives a longer and more cost effective Fuses (STx, SDTx, HPTx and HCTx)Battery Trays - A fuse is fitted which will blow if the battery trayterminals are inadvertently short circuited. Replace with a 2 A,quick blow in. normal use, the fuse will only blow if the Transmitter hasdeveloped a fault; do not replace the fuse - arrange to have theunit Fuse - Some High Power Transmitters have a fuse toprotect the output lines in case of inadvertent connection toconductors carrying an excessive output fuse is fitted next to the connection a Transmitter fails to operate in Direct Connection mode, butoperates in the Induction mode, check the output with a 315 mA quick blow fuse (630 mA 20 mm fuse forthe HCTx-2).

9 D20m15m15mRadiodetection APPLICATIONS ManualPage TO USE A RECEIVERT here are a number of techniques available for locating unknownlines in an area. Use of these techniques are particularlyimportant before digging in order to avoid damage to buried buried line is located by applying the distinctive transmittersignal to it then tracing it with the Receiver's Power and Radio passive modes are used tosearch an area for unknown power cables and other Receiver's active modes enable the Transmitter signal to betraced by the AND ACTIVE SEARCHINGP assive modeThe passive modes, Power and Radio.

10 Provide a convenientmeans of searching for lines without the need to connect aTransmitter. Although the Power and Radio modes will notnecessarily find all lines, much information can be gathered aboutcomplex sites. Always use both Power and Radio, never rely onjust Power mode detects the 50/60 Hz energy present on buriedcables and other Radio mode detects very low frequency energy reradiated byburied cables and other signals may not be present in detectable strength at somelocations. Where present, the Radio mode is a most usefulmethod for locating buried lines, in particular long distancetelephone lines and other lines not radiating a Power SearchThe site should be examined for covers, street lights and all othersigns indicating the presence of buried pipes or cables beforeusing the the area to be swept and include a generous marginaround the Receiver to the Power mode (Power+ for the RD400SL).