User manual C-SCOPE SIGNAL GENERATOR SG-V

[. . . ] Instruction Manual Cable Avoidance Tool Cable Avoidance Tool XD Signal Generator SG-A Signal Generator SG-V CABLE AVOIDANCE TOOLS WARNINGS The C. Scope Cable Avoidance Tools locate services radiating a detectable field. There may be some services that do not radiate and cannot be located. ALWAYS EXCAVATE WITH CARE Do not use the equipment outside of the temperature range -10°C to +50°C as the batteries may cease to function adequately. Geographical conditions such as hills and mountains can effectively screen radio signals and prevent a detectable ground current. The C. Scope Cable Avoidance Tool alone will not always locate every conductor so always use a Signal Generator. [. . . ] Make sure the Signal Generator is IN LINE with the expected route of these services. The signal will be radiated into the ground immediately below and for approximately 3 metres 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. 20 Signal Generator: Searching for an Induced Signal The search pattern used to find the Signal Generator signal when applied by Induction is slightly different to the search pattern used on the Power or Radio Modes or with the Signal Generator on the Direct Connection mode. Move AT LEAST 10 metres 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. 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 end of the Signal Generator. 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 avoid the risk of picking up the airborne signal. 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 and try again. Continue this procedure moving the Signal Generator in 5 metre steps, following a grid pattern, until a signal can be found. 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 then by moving the position of the Signal Generator slightly either side an increase or decrease in the locator response will be noticed. 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 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. 22 Signal Generator: Induction Multiple Services It is important to check for the presence of adjacent services running close, or parallel, to the conductor you have located. Check that there are no accessories plugged into the connection socket. Place the Signal generator on the ground ON ITS SIDE over the previously located service so that you are no longer inducing a strong signal onto the service. Re-scan the area looking for another peak close to where the original peak was found. This operation should be repeated until you are satisfied that no further services can be located. NOTE This method can also be used to `mask' one service so that another can be found. NOTE The signal will be radiated up to 3 metres either side of the Signal generator but NOT directly below. [. . . ] If stored for long periods the batteries should be removed. 37 Cable Avoidance Tool: Technical Specifications Controls: On/Off switch, spring loaded trigger switch under handle. 3 positions: P ­ Power mode R ­ Radio Mode G ­ Generator Mode Sensitivity Control Depth Switch (XD model only) Indications: Audio Removable and user replaceable loudspeaker. Multisegment LCD giving indications of the following: Signal strength Mode Battery Condition Depth (XD model only) Performance: Mode Sensitivity Power Radio Generator 7mA 12µA 2µA Depth of Detection on typical conductor 3m 2m 5m Filter Bandwidth 50-500Hz 10-30kHz 32. 1-33. 4kHz Depth Measurement (XD Only): G Mode only Range: 0. 2m to 3m (line), 0. 85m to 4. 5m (sonde) Accuracy: ± 5% @ 1m Construction: Case moulded from high impact plastic, sealed to IP65 Weight: 2. 9kg (including batteries) Size: 720mm x 270mm x 63mm Designed to withstand 1metre drop onto a hard surface. Power source: Internal 8 "AA" (LR6) cells (alkaline recommended). [. . . ]