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Armada Technologies
To use the passive mode, turn on the Pro900™ wand and select the
Passive AC mode using the control panel. This switches the receiver into
an unfiltered mode that detects the electrical field generated by 50Hz or
60Hz electrical current. Once the Pro900™ wand is on, simply search an
area until you hear a buzzing sound. There is no beeping signal as the
transmitter is not used. Follow the buzzing sound in either null or peak
mode, both will work, to track the cable. DO NOT RELY ON
THE 50/60 Hz PASSIVE MODE AS THE SOLE METHOD OF LOCATING
POWER LINES. Passive mode may not detect power cabling if there is
no live electrical current present in the cable at the time.
How to determine depth -
Then place the tip of the receiver on the ground at the mark. Without lifting
the receiver tip from the ground, lower the top of the receiver to
approximately a 45-degree angle and slowly walk the receiver away from
the wire path until you re-acquire the null. The distance between the wire
path and the newly established null is the approximate depth of the target.
This is the Equilateral Triangle method.
Determining target accuracy -
of determining target accuracy. Place the tip of the receiver on the ground
directly over your suspected target location, switch from null to peak by
pressing the mode selection pad. The peak and null responses will agree
if the locate is accurate. If the peak and null are off by more than a few
inches the location is not accurate. Toggling between the null and peak
modes often when locating the wire path will assure you of accuracy and
help build your confidence.
Helpful Hints – Increases in signal strength and/or the size of the area it
is occurring from usually indicates some type of anomaly in the cabling.
Things that could cause this are valves (as described above), nicks,
cuts, bad splices, or cut wires. Cable in good condition does not
normally change the tone or strength, other than a very gradual loss of
reception over distance, but it is possible. Slack loops of extra wire left in
the ground at installation are an example of a condition that would cause
an increase of signal and yet have no problem.
Pro900™ LOCATOR USER GUIDE
Find the null over the wire path and mark it.
This is a very easy to perform method
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