3M 900AST Series - Page 52

3M
™
Advanced Systems Tester 900AST Series
52
will be captured on the trace. The currently selected
wire type, gauge, and Vp are indicated. If you press
the key while in TDR mode, the TDR wire
parameters are imported into Auto TDR directly. To
change these parameters, press the key to enter
the Auto TDR Setup.
Press the key to move between fields. Use
the and keys to select a choice within a
parameter field.
Note: Vp is not an adjustable field in the Auto TDR
Setup. To change the Vp of a given wire type, use
the TDR Setup.
Use the key to accept any changes and return.
Use the key to return to the Auto TDR screen
without making changes.
When the correct information is displayed on the
Auto TDR screen, press the
key to start the
analysis. The 900AST performs DC parametric tests
to determine if the conductor or cable is shorted,
open circuited, or has a resistance fault.
Note: Resistance faults are very difficult to detect
using TDR techniques. If a resistance fault is
detected, the 900AST tester prompts you to consider
using the RFL (Resistance Fault Locate) function
as shown below.