Finding services
Locating technique
25 things filed against this subject, in every format the Bureau holds.
Advanced Signal Application: Connection, Clamp, Induction and Frequency Choice
The advanced session on getting a signal onto a line and keeping it there: the four ways in, which frequency to choose and why, aerial configurations, and the tracing techniques that follow from each.
Watch 2:09:53 →Getting the Best From a Genny: Connection, Clamp and Induction
A full run through signal application: the site survey first, then direct connection, the signal clamp and induction, with street lighting worked through including how a looping in and out system behaves.
Watch 1:07:19 →High End EM: Frequencies, Connections and Current Direction
Multi-frequency locators and what changes when you move up to them: frequency selection, distorted fields and what causes them, connection technique, and reading current direction to know which way the signal is running.
Watch 1:56:21 →High End EM Locators: RD8000, RD8100 and vLocPro2
The top end of the locating kit and what it does that a basic set cannot: signal strength and current measurement, what those numbers tell you when you are stood over a line, and the pipeline corrosion work these instruments are built for. Pete Ashcroft and Steve, in full.
Watch 3:44:52 →How the CAT Signal Changes Over a Buried Line
A sweep over a buried line with the audio kept, so you can hear the response build and fall away.
Watch 0:47 →Locator Tones on a Practical Exercise
A trainee being talked through holding the locator steady, with the tones it produces.
Watch 0:23 →The CAT Answering on a Signal
Six seconds of a locator on a signal, kept as a reference for the sound.
Watch 0:06 →The Pitch Change as the CAT Crosses a Signal
Audio only: the way the pitch and tone move as the locator crosses a signal.
Watch 0:26 →Tracing a Buried BT Line
Following a buried BT line on site, and what the locator gives you while you do it.
Watch 0:32 →What a CAT Sounds Like Over a Buried Service
A short recording of the locator answering over a buried service, kept for the sound of it.
Watch 0:33 →What Picking Up a Signal Sounds Like
A locator answering at the roadside, recorded with the traffic still going past.
Watch 0:18 →What the Locator Tones Sound Like On Site
A field exercise recorded for the sound: how the CAT and the Genny answer, and how the tone shifts as the locator moves.
Watch 1:07 →Worked Examples: Is That Enough Signal to Dig?
Worked street examples: which readings say dig, which say connect again, and why depth can be the thing that tells two cables apart.
Watch 4:20 →Holding the CAT: Waist Height, Housing Parallel
Waist height, the flattest part of the housing parallel to the ground, pointing along the walk. Small habit, big difference to what the CAT hears.
Watch 0:42 →How the Signal Travels
What happens to the signal after you apply it: where it goes, how it comes back, and what that means for what the CAT is showing you.
Watch 2:48 →Locating HV: Why It Is the Hardest
HV sits deeper, often under the LV, and usually offers no connection point. Why the standard toolkit needs adapting before you go near it.
Watch 2:18 →Location, Not Avoidance: A Worked Street
Location, not avoidance: building the picture of a street layer by layer with the transmitter, one service at a time, instead of one sweep and hope.
Watch 5:48 →Nulling Out: Sleeping the LV Signal
Nulling out puts a known signal to sleep so you can hear what is underneath: the dead zone on the display, and the HV below the LV.
Watch 1:44 →Scan Technique and the Sensitivity Habit
Why zigzag scans are outdated, and the sensitivity habit that separates a survey from a walk with a beeping box.
Watch 2:20 →Tracing Pipes vs Cables: Where Signal Leaks
A metal pipe leaks signal along its length; a cable holds it until the insulation fails. Why the two trace differently and how to read each one.
Watch 3:37 →Locating HV Cables with a Genny and CAT
Techniques and the things that make HV harder than LV: where you can and cannot get a connection, what the signal does on a bonded network, and how to read what comes back.
Watch 12:40 →Genny and CAT Training: The Full Run-Through
The whole method end to end in under ten minutes: pre-use checks, applying a signal, locating, pinpointing and taking a depth reading.
Watch 9:40 →