ANALOG 512HZ PIPE LOCATING
Specifications Frequency………………………………… 512Hz Power source……………………………………………..6 AA Alkaline Battery life…………………………………………………. 3-4 hours Controls…On-off/Sensitivity, Near/Far toggle switch, battery test button Outputs……………………Signal strength meter, speaker, headphones Dimensions……………………………………520cm”x110cm”x110cm” Weight………………………………………………… Operating temperature……………………….. 1 (0.
Welcome To pipe Locating You have purchased some of the finest locating tools in the business, but they don’t do magic. Your skill at handling these tools and recognizing their strengths and weaknesses is what makes a locating job successful. Before taking them out on their first job, make sure you understand how the system works. The following pages will take you through all the steps necessary to use your equipment.
Know your Analog Receiver 3
The ROD contains the antenna that picks up the signal from the camera with 512hz transmitter. It also points you in the direction of the line. Never use the rod as a probe or leveer-it will break the ferrite core and reduce the receiver’s sensitivity considerably. 〝X marks the spot! When you have found a peak or null, it’s right below the center of the rod.〞 The SENITIVITY knob allows you to control the amount of signal you see on the meter and hear through the speaker. It is also the on/off switch.
Getting to Know your Tools The best place to practice is above ground where you can see how the receiver responds to the location and position of the transmitter. You may be surprised at what you see. Better to be surprised when you have plenty of time to learn and nothing is at stake! Do your practicing in a place where you have plenty of room to move around –inside in a large room, or outside on the ground. Turn on a transmitter and toss it on the ground.
move makes it weaker, mark that spot) directly below the center of the antenna rod). Move to another place and seek this peak signal again and see if you always come back to the same spot. You should find yourself right over the transmitter each time. If you don’t, keep practicing until you get consistent results. I keep finding〝dead〞spots! That’s good news! And if you haven’t notice any〝dead spots〞, let’s go look for some.
Now turn the receiver to be perpendicular to the transmitter. The signal suddenly drops to almost nothing! This is a null. Move the receiver around a little to see how sharp and precise this null point is and how dependent it is on being exactly perpendicular. Now let’s look at some other places to find nulls.
Now for the real beauty of crossing nulls. Walk in a 5 foot circle around the transmitter with the receiver rod held straight in front of you and notice that you get a crossing null at two points of the circle, directly across from each other and on a line that runs right through the center of the transmitter, parallel with its long dimension. What’s so special about this? Well, imagine that you can’t see the transmitter, which is just like a real locating situation.
At the job site Before staring any locating job, please follow these simple steps. An ounce of preparation here can prevent ton of embarrassment and lost time. Survey the area –before turning on any transmitter turn your receiver on, flip the switch to “Far”, and turn the sensitivity all the way up .Walk around the area where you will be locating and check for source of noise or electrical sources can all cause the receiver to respond as though there is transmitter in the area .
Sonde Locating Your best locating success will involve moving the transmitter in small increments. Push it 5 to 10 feet, locate it using all the steps, then repeat this about the route of a line when you can’t see it, and you can waste a lot of time retracing your steps if you lose tack of the transmitter. If you are locating a septic tank using a flushable transmitter, follow our flushing guidelines. If the tank is close to the building you should find it pretty quickly.
flip the toggle switch to “Near”. As you move close to the transmitter, continue to maintain a meter reading in the middle of the scale. When you reach what seems to be the maximum signal, and every direction you move from there has a lower signal, you have reached the Peak Spot. Mark this spot, then move off in another direction and repeat the locating procedure. Keep doing this until you always return to the same spot. You should be able to narrow this rough-in area to within a few inches.
from each other, and describe a line that passes right through the peak area. You have just identified the two “Crossing Nulls”, and the line between them indicates the lay of the line is parallel to the axis of the transmitter, and we will assume for the moment that line is running straight through that point, along the line of the Crossing Nulls.
that goes through the Crossing Nulls. Walk from the center out to the maximum range of the transmitter, with the sensitivity all the way up in the “far” position. When in doubt, walk further away. Hold the receiver level straight in front of you, at waist height, heading toward the Peak Spot, and increase the sensitivity until you have a signal around center scale on the meter.
Continue walking, with the receiver straight in front of you and close to the ground, toward the other Crossing Null marker. As you pass over the Peak Spot on your way there, you will encounter the peak signal. Keep moving in the same direction (adjust the sensitivity to keep the meter needle in the center), and you will find another sudden signal drop-off. This is the “Back Null”, and it should be about the same distance from the Peak Spot as the Front Null was. Mark this spot also.
Troubleshooting Two things to always check before you start a locate, and again if you have trouble: Make sure the batteries in both your transmitter and receiver are fresh. If any doubt, throw them out! A weak transmitter battery reduces its range, weak batteries in a receiver can make it act brain-damaged, as well as reducing the range. Always test your transmitter and receiver above ground, for operation and range, before sending the transmitter down the line. Every time.
problem is the transmitter or the receiver. One obvious thing to try is a different receiver, or a different transmitter, but this is often not an available option if you don’t own a lot of equipment. Replace the batteries in both before you go further. An Ardy flushable transmitter can be tested by holding it near an AM radio tuned to a dead spot (no station) on the dial. If the transmitter is working, you’ll hear its raspy “beep-beep” from the radio.
