Error Messages During A Depth Measurement; Technical Specifications - Amprobe AT-3500 Mode D'emploi

9. For Power and Radio signals, an estimated depth measurement can be taken as follow:
a. Push control3 to select Power or Radio mode
b. Move to one side of the suspected cable until the following symbol appears:
c. Mark the spot
d. Move to the other side until the symbol appears again
e. Mark the spot
f. Measure the distance between the two spots
g. Divide the measurement by 2 to find the depth of the cable.

ERRoR MESSAgES dURINg A dEPTH MEASUREMENT

Symbol

TECHNICAL SPECIFICATIoNS

R-3500
The following parameters are specified for the R-3500 receiver:
Frequency ranges
• Range 1: radio
• Range 2: power network
• Range 3: transmitter
Sensitivity at a depth of 1m
• Range 1: radio
• Range 2: power network
• Range 3: transmitter
Dynamic response range
• Range 1: radio
• Range 2: power network
• Range 3: transmitter
Depth determination
• Depth range
Meaning
For of one of the following reasons, the depth could not be measured:
The signal received was too weak or too irregular.
•
The receiver was not held steady enough during the measuring process.
•
The receiver was not positioned directly above the line at the beginning of the process.
The depth of the metallic conductor amounts to more than 5 m (16 ft).
The depth of the metallic conductor amounts to less than 30 cm (1 ft). Such conductors must
be specially marked in order to prevent damage during construction.
The receiver was moved too far to the left or right while making a rough estimate. Move in
the opposite direction until the following symbol appears:
15 kHz to 23 kHz
50 Hz / 60 Hz; optionally 100 Hz (can be adjusted by Amprobe service personnel)
32.768 kHz
>20 µA
>7 mA
>5 µA
120 dB
135 dB
120 dB
0.1 m ... 5 m (4 in ... 16 ft)
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