UT25CL User Manual
26
Figure 7.3.1a Voltage Not Detected in NCV Mode Figure 7.3.1b Voltage Detected in NCV Mode
8. Special Applications
8.1 Track the Cable of GFCI-Protected Circuit
When connecting UT25CL-T transmitter to GFCI-protected circuit, if connect the transmitter
to the energized GFCI-protected circuit by the use of independent grounding, maybe trigger
GFCI protection. For GFCI-protected circuit, please use the methods below: For deenergized
GFCI-protected outlet which will not be triggered, please connect the test lead to the contact
point of the outlet, in deenergized sensor mode.
Method 1: Bypass GFCI-protected circuit to avoid triggering GFCI (Applicable to energized GFCI-
protected outlets only)
1. Remove the protective outlet panel.
2. Use alligator clip to connect the red test lead to the connection screw between the energized live
wire and the outlet.
3. Connect the black test lead through independent grounding.
4. Please perform tracking according to the instructions of the sections about automatic and manual
scanning modes.
Method 2: To avoid triggering GFCI, independent grounding is not used. (Applicable to GFCI-
protected outlet and circuit breaker)
1. Connect the test lead of transmitter to neutral and live wire.
2. Perform tracking in automatic or manual scanning mode.
Note: This method will cause signal coupling and reduce the signal strength. If the signal is
too weak or cannot be tracked, please use Method 3.
Method 3: Switch off the circuit power (Applicable to GFCI-protected circuit breaker)
1. Connect the transmitter to the conductor according to the instructions in the section of cable
tracking mode.
2. Perform tracking in automatic or manual scanning mode.
8.2 Identify Breakpoints/Opens
Even though the cable is on the wall, ground or ceiling, the breakpoint of the conductor can be
identified accurately in precise tracking mode.
1. Make sure the cable is deenergized.
2. Connect the transmitter and perform tracking according to the steps described in the section of
automatic or manual scanning mode.
3. To obtain a best result, please use the black test lead to ground all parallel deenergized cables.
As long as the metal conductor is connected, the tracking signal generated by the transmitter will be
transmitted along the cable. Track the cable to identify the fault until the signal is stopped. To verify
the location of the fault, please move the transmitter to the other end of the cable to perform tracking.
If the signal is stopped at the same location, then the location of the fault is found.
To Next Page
Loading...