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4 Using the vLoc3-Pro
2
1
3
1 Null Position
2 True Position
3 Peak Position
•
● Measure the depth of the buried line by pressing “i” pushbutton briefly to measure depth and current. The depth should be
approximately in line with the “as built” plans available. If no plans are available logic would still help to assess the situation
(for instance, if you are looking for a shallow CCTV distribution cable and the depth indicated is 5ft (1.5m) it should raise a
concern).
● Take a depth reading on the ground and then raise the locator approximately 1ft or 0.25m and repeat the depth
measurement. The depth should increase by this amount, if not treat the information with caution.
● A depth reading on congested areas or close to bends or tee’s maybe inaccurate due to distorted fields.
d
d
d
d
d
4.10 Sonde Location Mode
A Sonde is typically used for locating non-metallic pipes or ducts, and the camera end of a sewer inspection camera. Low
frequency versions (512Hz/640Hz) can transmit through some metallic pipes such as cast iron pipes – which is why they are
frequently used with sewer inspection cameras.
Sonde screen icons:
67.2
25dB
8kHz
2 2
3 4 5
6
8 7
1
1 Peak signal detector
2 Signal strength bar graph
3 Sonde icon
4 Null point
5 Direction to sonde
6 Frequency selection
7 Numeric signal level (mirrors the bar graph)
8 Gain setting
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