User manual AQUA-TRONICS ACOUSTIC DETECTOR AD-100

[. . . ] . 10 1 DIGI-7 The Digi-7 line locator is two locators built into one. Both receiver and transmitter will operate in a full automatic mode or a full manual mode with the push of a button. ACCESSORIES FOR THE MODEL DIGI-7 LINE LOCATOR The Model I. C. 49, I, C, 56, or I. C. 56WT Inductive Couplers are used to help identify one line from other utilities even though they are sharing a common ground. BATTERY TEST RECEIVER: When the receiver is first turned on, all of the information available on the LCD is displayed for approximately 3 seconds. [. . . ] In the Manual mode, the tap switch must be pushed until the tap # desired by the operator appears in the numerical display. Manual mode can also be used for mismatching the transmitter to the line being traced to correct for a broad peak reading. See page 8 DIRECT OUTPUT With the direct output cable assembly plugged into the transmitter, connect the red lead clip to the conductor being traced. Insert the ground rod in the earth and clip the black lead clip to it. It is important to obtain the best ground possible. This may be within inches of where the transmitter is connected, or several feet away. HINT: Pouring water on the ground rod can improve the ground connection in dry soil. A FIVE-GALLON CONTAINER OF WATER IS A VERY IMPORTANT ACCESSORY TO HAVE WITH YOU. Turn on the transmitter and have the power control at low power. If the transmitter is in the automatic mode, the numerical display will set itself to the correct tap number for the best locate. If the soil conditions or power level change while locating, the transmitter will track that change. In the Auto Mode, the knob is a "VOLUME" control. Push the NULL button for NULL operation. A little flag at the lower left corner of the display will point to NULL. Move out 5 to 10 feet from the transmitter and walk a half circle around transmitter until the bar-graph display starts to increase. At some point, the bar-graph will drop to a small value and then increase. Directional arrows are also present that will indicate what direction is needed to find the conductor. As the receiver moves past the null point, the directional arrow will change and a different tone will be heard. Each time the conductor is crossed, the directional arrow will change and the sound being heard will also change. The numerical signal strength meter will read absolute signal and it will be at a maximum number, even though the receiver is in the null mode of operation. In the Automatic Null Mode, the receiver will provide direction to the conductor with left/right arrows on the display so the receiver must be at right angles to the conductor path in the Auto Mode. LOCATING BY THE NULL METHOD - IN THE MANUAL MODE Locating in the manual mode allows the operator to take control of the receiver sensitivity. [. . . ] The calculation will have to take into account any slope of terrain, or the height that the receiving antenna is held above the ground when the depth measurement is being made. When possible, a depth reading should be made from both sides of the line being traced. If both measurements agree with each other, the operator can assume a good depth measurement has been made, and the locate is fairly accurate. If the two depth readings do not agree with each other, relocate the line and then repeat the two depth measurements. [. . . ]