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Using Test Mode
Use Test Mode to calculate the length of unterminated cables. A termination with
impedance closely matching the characteristic impedance of the cable can produce
inaccurate test results. One of the following error messages may appear in the LCD
display screen:
•
“Short” icon appears demonstrating the cable is terminated.
•
“Error” message blinks to indicate that SSTDR reflection was not detected due to a
properly terminated cable or excess signal loss.
When Test Mode is in use, the connected cable is tested for the presence of
voltage. If detected, a dynamic voltage warning displays until the unit is disconnected
from the voltage source.
1.
Connect a cable to the FaultChaser. Use connection accessories according to the
type of cable you are testing.
Note: Connection to the cable should be as short as possible to minimize the
impedance discontinuity at the cable attachment point. Otherwise, The FaultChaser
may see a fault at the connection point.
2.
Press the POWER button to turn the unit ON.
3.
Select the memory storage location (M1 or M2) with the desired NVP value for
testing. The NVP value requires adjustment if neither storage location contains an
NVP value matching the type of cable you are testing.
Note: Refer to the Using Memory Storage section for instructions on adjusting NVP
values.
A listing of common NVPs by cable type is on the backside of the FaultChaser. You
may also refer to Appendix A for an extended list of NVP values.
4.
Press the TEST button. The LCD display screen shows the following upon
entering Test Mode (See Figure 8):
•
The measured cable length in units of feet or meters.
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