Special Applications
Section 2
Page 65
Step 1 – Setup:
• Disconnect shield bond to isolate the shield at
both ends.
• Determine the length of the section under test and
record as measurement “D.”
Step 2 – Hookup:
• Red – shield
• Black and green – ground rod; or when induction
is interfering, connect to several bunched vacant
pairs.
Step 3 – Measure from near end:
• Press the ON/RESET key, then the OPENS key
and select SPECIAL 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 = 73.2 m, B = 33.5 m, amd D = 88.4 m,
then C = A + B = 73.2 + 33.5 = 106.7 m
distance to open from end A:
d
A D
C
73.2 88.4
106.7
60.6 m
To Next Page
Loading...
Need help?
General
