Underground Utility Locator Training for Pipe Locators, Cable Locators and Camera Locators

Cable and Line Locator Training RJM provides training for pipe locator, camera locator, underground cable locator.
Home Please contact us questions or prices: 800-620-4773 sales@rjmcompany.com Cable and Line Locators RD8000 Cable and Line Locators RD7000 Underground Cable Locator yRD4000 pipe locators RD2000 cable locators CAT cable locator GPR - Ground Probing Radar Pipe Sondes Cable Fault Locators Metal Detectors Plastic Pipe Locators Cable Line Locator Training Sewer Cameras InsightVision sewer pipe cameras Vivax sewer lateral cameras Ratech recording sewer cameras Ratech non-recording sewer cameras Ridgid Seesnake sewer cameras Mainline utility inspection cameras Sewer camera skids Pipe Cleaning Equipment Sewer Cable Machines Sewer Jetters Drain Cleaner Utility Construction Vacuum Excavation Trailers Pipe Bursting Equipment Electric fusion welded pipe Concrete Core Drills Water Products Water Leak Detector Water Leak Correlator Water Leak Loggers Water Leak Location with Helium Water Valve Operators Municipal Equipment Combination Sewer Cleaners Catch Basin Cleaners Street Sweeper Equipment Manhole Cameras Odor Control Biofilters Site Map Related links Link Exchange Utility Training Academy Inc	We will be adding new locating information often, so please check back. Please contact us for questions or to suggest a topic. Topics Pipe and Cable Identification with Current Measurement Cable and Pipe Identification with Current Direction Cable and Pipe Depth Verification Which Locate Frequency Should I Use? Accuracy Verification with Peak and Null Antennas
	Pipe and Cable Identification with Current Measurement Because utility locator frequencies jump from one utility to another, it is common to find signals on more than one utility. Shallower utilities such as telephone and cable TV can have a stronger locate signal indicating that it is the target utility. The RD4000 and some other pipe and cable locators include a current measurement feature. On the RD4000, when you check the depth the current measurement is also displayed in the low left corner or the display. The current measurement value is the amount of signal from the transmitter on the utility at that point. Any current that may be flowing through the cable from other sources does not affect this measurement. The utility that you apply signal to with the transmitter will have the highest current measurement. The strength of the current measurement signal varies depending on the conditions, but the important part is the strength of the current measurement signal is higher than the others. Accurate current measurement depends on accurate depth measurement.
	Cable and Pipe Identification with Current Direction The forward arrow displays when the receiver senses signal from the same utility that the locator transmitter is applying signal to. All other utilities will show the backwards arrow. After long distances the signal may need to be reset by locating the center of the target utility and pressing the menu key. The Radiodetection RD4000 PDL and Radiodetection RD400 PDL offer a unique feature that identifies utilities. A RD4000 T10 transmitter connected directly or with the "Low Frequency / Current Direction" is necessary.
	Cable and Pipe Depth Verification Interference form other pipes, cables and utilities can cause errors in depth measurement. To check the accuracy of depth measurements, check the depth at ground level, the raise the pipe and cable locator up by a known height. If the change in the depth readings equals the height that you raised the pipe locator, then the locator depth readings are accurate. Pipe and cable depths are to the center of the cable or pipe. The depth accuracy specification for the RD4000 pipe and cable locator is within 2.5% of the depth when not affected by other pipe or cable signals..
	Which Locator Frequency Should I Use? Use the lowest frequency that works. The signal from a utility locator transmitter transfers by conductivity and inductance. Signals traveling by conductance are like DC or 60 hz AC circuits, when the switch is closed connecting the circuit the current flows. When the switch is opened discounting the wires the current stops. The amount of current from the locator transmitter that flows by conductivity depends on the resistance. High resistance can be caused by dry soil, rusty connections and others. The signal traveling by conductance will find the easiest path (path with the least resistance.) Signals traveling by inductance work like a radio transmitter and radio receiver. Low frequencies have very little signal traveling by inductance, so the signal remains on the utility that the transmitter is connected to.
	Locator Accuracy Verification with Peak and Null Antennas The RD4000, RD400 and some other pipe and cable locators have both peak (horizontal) and null (vertical) antennas. The peak antennas display a maximum signal above the utility. The null antennas display a minimum signal when above the pipe or cable and a maximum on each side of the pipe or cable. When there is no interference from nearby utilities, the peak and null locate signals are both shown in the correct position, directly above the underground pipe or cable. However, nearby pipes, cables or other utilities can cause distortion of the locator signal around the target utility. The distortion causes the position of both the peak and null to shift in the same direction. The position of the null signal moves more than the peak signal causing the position of the null signal to be in different position than the peak. When the peak and null are in a different place, both measurements are being affected and have errors. The peak signal is affected less than the null signal by interference, if the peak and null signals are different, the peak signal will be closer. Reducing the signal on other utilities improves the locater signal accuracy.

RJM Company Brian Moss 800-620-4773 brianmoss@rjmcompany.com sales@rjmcompany.com Office: 360-828-5732 Cell: 360-903-0558 Fax: 208-988-6447 9808 NE 134th Av, Vancouver WA 98682 Representatives for Radiodetection in Oregon, Washington, Idaho and Montana since 1991 for cable fault locators, sondes, plastic pipe locators, water leak detectors, metal detectors, RD2000, CAT underground cable locator, RD4000 .