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4. SPECIAL APPLICATIONS
4.12 Signal Clamp - Closed loop circuits
Closed loop, de-energized, low impedance circuits
The clamp accessory is used for applications where there is no access to the bare conductor
to connect transmitter test leads. When clamp is connected to the transmitter, it enables the
AT-6000-TE to induce signal to energized or de-energized wire through the insulation.
Typical applications include tracing conduits or shields grounded on both ends. For signal
cables and de-energized wires or loads, ground temporarily circuit on both ends to perform
tracing.
Connect the clamp
1. Connect the CT-400-EUR test leads to the terminals of the transmitter (polarity does not
matter).
2. Clamp the CT-400-EUR Signal Clamp around the conductor. To increase the signal
strength, wind a few turns of conductor wire around the clamp if possible.
Set up the AT-6000-TE Transmitter:
1. Press ON/OFF key to turn on the transmitter. The red LED voltage status indicator should
be OFF when clamp is connected.
2. Press HIGH signal mode and hold pushbutton
for >2 seconds to select the Loop mode on the
transmitter. The clamp mode generates a boosted
6kHz signal in order to provide superior tracing
results. The screen on the Transmitter should
appear as in Figure 4.12b.
Using AT-6000-RE Receiver
1. Press 'ON/OFF' push button to turn on the receiver.
2. Select either Quick Scan or Precision Tracing mode.
3. Hold the receiver with the Tip Sensor facing the
target area.
4. Scan target area with Tip Sensor to find highest
signal level. While tracing, periodically adjust
sensitivity to keep signal strength near 50.
Increase or decrease sensitivity by pressing + or -
on the keypad.
5. Receiver Positioning: For best results while tracing
figure 4.12a
Transmitter screen showing signal
in LOOP mode
24
AT-6000-T
TRANSMITTER
SIGNAL
HI
>2s
LO
Figure 4.12b:
ON
BLINKING
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