User's Manual

Chapter 16 Test Results
Copper results
SmartClass TPS User’s Guide
136 22035456, Rev 001 May 2014
– detect the presence of hazardous voltage.
– measure stray or foreign voltages.
– measure ringer voltage level.
AC voltage results on Tip (A) to Ring (B) should be 0.0 volts. Tip (A) to ground and Ring (B) to
ground should be equal to each other. Anything else indicates AC signal interference and/or an
unbalanced line.
Table 43 describes the AC voltage result.
DC voltage
You measure DC volts to:
– detect and measure CO/exchange battery voltage.
– detect crossed battery conditions.
To measure DC volts, remove the line battery and measure Tip (A) and Ring (B) to ground. It should
be < 3.0 volts; anything else indicates crossed battery that inhibits digital signals.
Table 44 describes the DC voltage result.
Resistance
You measure resistance to test line continuity and quality, and to detect corrosion, shorts, opens,
and faults.
The SmartClass Triple Play Services is able to measure resistance in the presence of noise and
foreign voltage, but the accuracy may be reduced, depending on the noise level.
Resistance should be measured with the line disconnected, so that the battery voltage and CO/
Exchange termination don't affect the measurement.
Normal resistance should be at least 5 M; lower values indicate the presence of faults.
Table 43 AC Voltage result specifications
Range (VAC) Resolution (V) Accuracy
AC peak + [VDC] <
300 1 2% ± 1.0V
WARNING: INSTRUMENT DAMAGE
Although the SmartClass Triple Play Services is designed to measure hazardous voltage, it is
designed to do so on telecom circuits, not power mains. Hazardous voltages may be on the
power lines. 220 mains (RMS) are equivalent to 308 peak. Connecting to these circuits may
result in damage to equipment or serious injury.
Table 44 DC voltage result specifications
Range (VDC) Resolution (V) Accuracy
AC peak + [VDC] <
300 1 2% ± 1.0V