Underground wire locator
NOYAFA Electronic specializing in testing instruments and cable testers for 15 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 15 years
The underground wire locator NF-816L is designed to allow the user to track low voltage cables used for garden and landscape automatic watering systems, and also low voltage garden lighting systems.
lt can also be used to trace other metal cables.
The system uses a "transmitter" to send a signal through the cable being traced or to a sole noid valve that is being located.“receiver" is then used to pick up the signal and follow the cable orlocate the coil.
| NF-816L Transmitter specification | |
| Tone Frequency | 200kHz |
| The Maxlength distance | 800m (2400feet) |
| The Max depth distance | 60cm(24inch) |
| The Max. working current | Less than 70mA |
| Max.signal voltage | 15Vp-p |
| Signal display | Tone |
| Battery type | Lithium battery 3.7V 1100mAh |
| Dimensions(LxWxD) | 49x 135x 33mm |
| NF-816L Receiver specification | |
| Frequency | 200kHz |
| The Max. working current | Less than 70mA |
| Earphone jack | 1 |
| Battery type | Lithium battery 3.7V 1100mAh |
| Dimensions(LxWxD) | 43 x 168 x27mm |
A. Transmitter Connection
To locate a cable follow the following procedure:
1)Connect the transmitter to the cable you are looking for. If the cableis connected to an irrigation controller,Disconnect the cable from itsnormal power source and clip the RED alligator clips from the
transmitter onto the cable.
2)There are several options for connections of the black alligator.
2.1) to a blade of a screw driver pushed into the ground (preferably wet ground), you might require to connect via a short length of cable.
2.2) to the ground wire.
2.3) to Nothing, just let the black alligator clip dangle in the air.
3)Move the transmitter switch to the “Cable scan" position.
B. Tracking Buried lrrigation or Garden Lighting Cables
Once the transmitter is attached to the cable and the ground or common as in“B" above, ensure the transmitter switch is in the "Cable Scan" position and turn the “Thumb Wheel" switch to high tone.
Locate approximately the route of the cables and swing the receiver antenna (8) in a pendulum type action at right angles to the cable pathstarting at least 3 meters away from the transmitter.
As the receiver antenna swings past the underground cable, a tone willbe heard on either side of the cable path, when you are right over the buried wire,you'll get a gradual increase in the tone and hear theloudest sound.
You can adjust the transmitter and receiver controls to move further distances according to your wire depth. You can also use the ear phones to assist with the detection.
C. Detecting Cable Break
A cable break will be detected by the loss of signal inthe receiver antenna
D. Locating Alarm,Sound & Computer Wires.
To locate other wires, it is best to disconnect the wire in question anddirectly attach only one transmitter lead to the subject wire,lettingthe other lead hang. Trace the path as outlined in point 'C' (Locating& Tracking Buried lrrigation Wires).
E. Measuring Depth
Once the path has been determined, mark the ground at a null point along the path.
Hold the Receiver antenna at a 45-degree angle to the ground and move at a right angle away from the path of the wire until another nullis found. Mark this point. the distance between the two marks is theapproximate depth of the wire.
F. Pin pointing Drill Sites
Setup the Transmitter as described in (Fig.01)
Locate and mark the path of any signal near your drill site. If you have reason to believe that other installations are present near your drill site, use the procedures outlined in section 'C' (Locating&Tracking Buried lrrigation Wires).
The signal generated by the Transmitter can be detected through wall sand ceilings, to pin point the transmitter's location (specific point), wrap the alligator clip leads around the Transmitter, short the leads together,turn the transmitter on and secure it to the opposite side of the wall or ceiling with tape. Scan the wall with the antenna flat against the wall.The PEAK signal will be heard when the antenna passes directly overthe transmitter location.(Fig.02)
G.External Earphones
The 3.5mm earphones can be connected to the Receiver earphone jack to improve efficiency in a noisy environment.(Fig.03)
H. White LED Flash-Light
The user can activate the LED flash-light by pressing the 'PushFor Light button.(Fig.04)
The only field service required for maintaining proper operationis the periodic replacement of the batteries in the Transmitter and Receiver.
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