User's Manual

Chapter 16 Test Results
Copper results
SmartClass TPS User’s Guide
138 22035456, Rev 001 May 2014
– find wet sections, bridged taps or open faults.
Opens/Capacitance: < 3% difference between Tip (A) and Ring (B) values indicate an acceptably
balanced loop. Anything greater indicates an unbalanced line or open fault, which inhibit digital
signals.
Table 48 describes the opens/capacitance result.
DC current
You measure DC current to verify if enough current is present to operate equipment including the
phone or caller ID boxes.
DC current on Tip (A) to Ring (B) should be  23 mA at the NID. Anything less will not allow for differ-
ences in temperature and phone equipment will not operate during extremes.
Table 49 describes the DC current result.
Table 48 Opens/Capacitance result specifications (no ambient)
Range (feet)
Resolution
(feet)
Range (meters)
Resolution
(meters)
Range
(capacitance)
Accuracy (applies to
capacitance only)
0 to 2,999 1 foot 0 to 999 0.1 meter 0 to 44.9 nF 3% ± 45 pF
3000 to 66000 1 foot 1,000 to 20,000 0.1 meter 45 nF to 1.04 µF 3%
Table 49 DC current result specifications
Range Resolution Accuracy
0 to 110 ma 1ma 2% ± 1ma