Heath Consultants Sure-Lock All Pro - Manual (Page 32)

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above indicators) and the receiver is positioned directly above the conductor, the
following will occur:
a. The LOCK indicator will remain active on the LCD display.
b. The left-right arrows and segmented bar graph will disappear from the
display.
c. The audio left-right tones will null (produce no sound).
d. The SPI will show the highest relative number on the display.
e. The estimated depth will be displayed.
Each of these indications gives the operator valuable information about the
conductor being traced. It is an indication that the conductor has NOT been
pinpointed if ALL the above do not occur.
Conductor Depth Procedure
Once the conductor has been pinpointed using the audio and visual indicators as
previously described, the operator may then perform a calculated depth indica-
tion reading.
The operator should follow these procedures to obtain a calculated depth read-
ing:
1. While maintaining a vertical position, rest the tip of the probe on the
ground directly over the conductor with the receiver blade perpendicu-
lar to the conductor.
2. Hold the receiver in a vertical position with the bubble in the bubble
level centered. It must not angle away from, toward, or to the left or
right of the operator.
3. -
onds to obtain an automatic calculated depth calculation.
4. The operator should then see the CLC followed by a number appearing
on the display. This number will remain displayed for several seconds
and will indicate the depth in inches (or centimeters, optional) to the
CENTER of the conductor. The receiver features automatic return to
search mode and estimated depth.
5. It is good practice to take at least 2-3 depth readings as a cross check.
To repeat a depth reading, maintain a vertical position.
If a depth indication does not appear on the display or there is not logical se-
quence to the numbers, it usually means the following:
a. “Ghost Signal” (jittery L/R and SPIs).
b. Air-coupling to the transmitter.
c. Interference from other conductors.