Meter - Dc; Meter - Noise (Ac); Time Domain Reflectometer (Tdr) - AALogic TriTone User Manual

6.3 METER – DC
The DC meter shows DC voltage on cable pairs. This voltage may indicate a working
pair or a DC fault on the pair. Wet cables frequently show DC voltages on vacant pairs.
DC may also be an indication of a short or cross with another pair.
•
From the Main screen, press
The meter defaults to DC voltage. The display indicates the VDC TR, TG,
and RG. The readings are updated approximately once per second. A small
dot at the upper left, just outside the box, blinks each time the value is
refreshed.
Ensure good connections are made to the pair wires and ground.
6.4 METER – NOISE (AC)
The AC meter displays noise on the cable pair. Noise Tip to Ring is an indication of
balance problems on the pair and noise Tip to Ground or Ring to Ground indicates
problems with bonds and shields.
•
From the Main screen, press
•
Press [F1] to toggle to the AC mode.
The meter display indicates the voltage in VAC TR, TG, and RG. The
readings are updated approximately every three seconds. A small dot at the
upper left, just outside the box, blinks each time the value is refreshed.
•
[
Press F3
The units, VAC are RMS values and correspond to normal indications of AC
voltage using a multimeter. Noise is typically specified in DB. The units in the
measurement windows are the current measurement units.
Ensure good connections are made to the pair wires and ground.
6.5

TIME DOMAIN REFLECTOMETER (TDR)

The TDR is a pulse type TDR used to determine length of open pairs and locate
cable faults by analysis of the impedance of the line.
A TDR requires the user to enter the velocity of propagation (VOP). The distance
indication will be in error if this value is incorrect. The VOP can be set by pressing
the [CFG] key from the TDR screen, pressing [F1] VOP, and selecting a standard
cable type or entering the Custom VOP value.
ESTIMATED DISTANCES WILL BE INCORRECT IF THE VOP IS NOT
The measurements are continuous allowing observation of changes in the pair over
time and testing additional pairs by moving the clips.
Allied Analogic, Inc.
]
to toggle units from RMS or DB
SET PROPERLY.
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F3 METER
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F3 METER
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