™
P/N: 4.04.000037
VM-540 User Guide V1.4
Introduction
This guide describes the operation of the VM-540 Sonde locator. Sondes
are small transmitters that are inserted into non-metallic pipes and ducts
for the purpose of locating its path. Sondes are also built into push
camera and crawler camera systems. The lower sonde frequencies of
512Hz or 640Hz can be located in metallic pipes. The radiated signal
from the Sondes are detected with the VM-540 receiver along with its
depth of cover. The receiver can also passively detect the presence of
50Hz 60Hz which radiate from some live power, Cable TV or Telephone
lines.
What’s in the box – each VM-540 is supplied with:
Receiver Display Functions
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VM-540 receiver
Battery holder
2 x AA alkaline battery
Mini-USB cable
User guide
Soft carry bag
Battery level indicator
Speaker level indicator
Percentage signal level
Selected sonde frequency
Signal level indicator
Sensitivity setting indicator
Service Center Information
If the equipment does not function properly, replace the batteries as
described above. If the equipment still malfunctions, contact one of the
Vivax-Metrotech Customer Service departments, or call the factory for
the nearest authorized Vivax-Metrotech repair center.
Disclaimer:
Product and accessory specification and availability information
is subject to change without prior notice.
Changing Batteries
NOTE
The depth measurement is an approximation. Depth
indications can be affected by field distortion caused
by interference from in-band signals or metal structures
such as re-bar. An aid to determining if the depth is
correct is to repeat a depth measurement with the
locator a known distance (for example 1ft./30cm) above
the ground) and to note if the depth has increased
by this amount. If it is different from what is expected
treat the data as suspect.
A low battery is indicated by the icon of the receiver display.
To replace the batteries, unscrew the end cap on the handle end of
the VM-540.
Remove and replace both batteries with fresh 1.5V alkaline AA
(LR6).
Replace end cap.
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NOTE
Moving the locator further left and right will result in
detecting smaller “ghost” signals either side of the
main one. This is normal. Always be sure to locate
all three peaks when locating the position of the
Sonde as the ghost signals are not directly over the
Sonde. The largest one is the true position.
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Depth Measurements
To take a depth measurement pinpoint the position and direction as
previously described, pinpointing left/right, forward/back and also
rotating on its axis. Hold the locator vertically over the position of
maximum signal. Now press the “target” pushbutton. There will be a
short delay before a depth estimate will be displayed.
Moving forward and back across the Sonde will not detect ghost signals.
Now push the Sonde a couple of meters (yards) into the pipe. Stop and
re-locate the Sonde. The direction of the Sonde can be confirmed by
holding the locator vertically and rotating it on its axis until the largest
signal is detected. The Sonde will then be pointing at right angles to the
display.
Continue pushing a short distance and relocating as the Sonde is
pushed into the pipe. Do not be tempted to push the rod too far into the
pipe without locating the Sonde as this will make finding the Sonde more
difficult.
Ghost Peak
Ghost Peak
Main Peak
Vivax-Metrotech Corp. (Headquarters)
3251 Olcott Street, Santa Clara, CA 95054, USA
T/Free: +1-800-446-3392
Tel: +1-408-734-1400
Fax: +1-408-734-1415
Email: [email protected]
Website: www.vivax-metrotech.com
Visit us at
www.vivax-metrotech.com
to view our full product line
and worldwide locations.
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