How to Use an Induction Clamp

Okay, so now we’re going to locate this cable using the induction clamp. What we’re going to do is we’re going to take this induction clamp. We’re going to wrap it around this four inch conduit. First, I’m going to plug it into the transmitter, then I can take the clamp and I’m going to wrap it around the conduit that I target line and then I’m going to cut on the receiver, sorry, the transmitter, and I’m going to select a frequency.

5/12 is too low to use the induction clamp, so we’re going to use eight kilohertz. Right now it’s on low power. Now, I’m going to turn the volume lower so it’s easier for you to hear me. Now, what I like to do is take the transmitter and move it away from the way I think that cable’s running. It doesn’t matter how I put the transmitter, lay it down on the ground, because all the energies going through the cable and inducing onto the cable in the pipe.

Now, I’m going to cut my receiver on by hitting the on/off key, and then what I’m going to do is I’m going to do a semicircle around this conduit to see where it’s heading. I’m going to come around here. I didn’t pick up anything, so I’m going to increase the gain. What we’re going to hear…

Right now, if you look at the numbers in the screen and the bar graph, it is pegged out; meaning that it’s all the way. The highest the bar graph and the numbers will go is 99. It’s a semi-automated gain, so I’m going to hit the negative key one time and it should drop it about 50%.

Once I’ve done that, now I can move, try and see if I can find the line again in a little bit. Now, what you see is it’s going down, so I passed it up. I saw 50, so it’s right in here. I’m going to go down, straight down. As you notice, the number built up a little bit because I’m getting closer to the ground.

Now, since I’m sitting, I have the best locate. Now, I’m going to rotate the receiver to see the direction that it’s going, so I’m rotating it. If you notice, the numbers are dropping. I’m looking for the lowest number. Notice how the volume dropped out also as the numbers got lower. I’m going to go right. Now, it’s building back up.

Right in here is a direction that it’s running, so I’m going to place my foot just to give me an idea of the way the line is running. When I turn receiver passed the… Now, I need to start walking in this direction. I just pick it up.

The bar graphs going to go; you notice how the sound is getting a little bit quieter because I got further away from the target line. Now, we’re locating that line out. Notice how I’m cutting the cable in half. Then, once I get it so far, if I want to check the depth, so I’m going to once again get a location.

What I want you to see is that the number is not as high as it was before. It was around 50. There’s two reasons that this could take place. We had gotten further away from the transmitter, so we’ve lost a little bit of signal as we walk away from it. Also, it could be that the cable’s gotten deeper into the ground so there’s a further distance the signal has to travel into the antennas.

We’re going to hit this target button right here to find the depth. I want to be straight up and down, and I’m going to tap it. It says two foot, one inches. I’m going to do that one more time, input one. I can make a mark if I choose to. I want to see the direction it’s running by rotating it once again, maybe.

Right in here I got it marked. Now, I can lift it up. I want to, I can increase the gain to let more signal into it, and then I just keep walking. You can continue doing this until you’ve finished your locate. You go over how far you feel like you need to go to make your next locate.

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