Rev. 11/10/00
9
BEFORE YOU START ANY FAULT TESTING
, you should check for AC and
DC voltage. It’s rare to find AC on a POTS line, but it does happen.
ALWAYS
check for
AC BEFORE
you check for
DC.
AC Volts Test
The AC Volts function tests for the presence of AC voltage on the pair.
To check for AC volts,
1.
Turn the
MODE SWITCH
to the
OFF
position.
2.
Connect test leads; Black, Red, and Green to; Tip, Ring, and Ground.
3.
Turn the
MODE SWITCH
to
AC VOLTS
.
4.
There should be
MINIMAL
AC voltage. If AC voltage is 50 volts or above,
STOP
immediately and remove the AC voltage before continuing.
DC Volts Test
The DC Volts function tests for battery presents on both working and dry pairs.
Why check for DC voltage? There are three reasons:
1.
DC power is required to make a
POTS
line work.
2.
DC Volts indicates CO battery presence.
3.
DC
should not be found on a Dry, Vacant, or Nonworking line.
Dry,
Vacant,
and
Nonworking
all mean the same thing – not in service. If DC
volts are found on a Dry, Vacant, or Nonworking pair, it is crossed with a
Working pair.
To check for DC Volts,
1.
Turn the
MODE SWITCH
to the
OFF
position.
2.
Connect test leads; Black, Red, and Green to; Tip, Ring, and Ground.
3.
Turn the
MODE SWITCH DC VOLTS.
4.
The
REVERSE SWITCH
should be in its normal position,
UP
. If DC voltage
is present, the meter will read 48 - 52 volts. Remember, the meter is
looking across the pair and will read zero or negative volts if the pair is
reversed. The pair is
reversed
when the
REV SWITCH
is
DOWN
and the
meter reads 48-52 positive volts. While in the DC mode, you can check
Tip-to-Ground
and
Ring-to-Ground
by holding the
TIP
or
RING SWITCH
UP.
