Special Applications
Section 2
Page 64
5. Locating Opens by Ratio Quick Reference
Step 1 – Setup:
• Disconnect the open conductor at both ends
• Determine the length of the section under test and
record as measurement “D.”
Step 2 – Hookup:
• Red – open conductor
• Black and green – shield or other conductor
Step 3 – Measure from near end:
• Press the ON/RESET key, then the OPENS key
and select NORMAL MODE
• Press the # (pound) key and select AIRCORE
CABLE
• Record the RING measurement as “A.”
Step 4 – Measure from far end:
• Repeat Step 3 from the far end.
• Record the RING measurement as “B.”
Step 5 – Calculate:
If C
= A + B and D = section length, use this formula
to calculate distance to open from end A or B:
d
(
AorB
)
D
C
Example:
If A = 240ft, B = 110ft, and D = 290ft,
then C = A + B = 240 + 110 = 350ft
distance to open from end B:
d
B D
C
110 290
350
91.14 ft
To Next Page
Loading...
Need help?
General
