Velleman VTTEST11 Mode D'emploi page 2

4. Use
a. RJ12 Network / Phone Connector Test
The Tone Generator can be used to determine the polarity of a phone line or network connection.
1. Set the tone generator's mode switch (p.1 #3) to 'Off'.
2. Insert the phone line connector in the phone / network socket and connect the red and black connectors to the
wires to be connected.
3. Upon connection of the red and black connectors, the signal indicator LED (p.1 #5) should light up. Green means
the polarity is correct (black is "+" and red is "-"). Red means the polarity is inversed (black is "-" and red is "+").
If the LED does not light up, either the connections are not established correctly or the socket is not connected.
If the LED flashes green and red alternately, it means there is an incoming phone call (ring signal).
b. Cable test
The Tone Generator can be used to determine whether or not a cable is interrupted (test per wire couple).
1. Set the tone generator's mode switch (p.1 #3) to 'Cont'.
2. Create a short circuit between the wires to be tested at the far end of the cable.
3. Connect the red and black connectors to the wires to be tested.
4. If the signal indicator LED (p.1 #5) lights up (green), the 2 tested wires are uninterrupted. If the LED does not light
up, either one or both of the wires are broken or the wrong wires were connected or short circuited.
Beware: make sure the wire couple under test is not in contact with any other electrified or earthed object ; this may
cause an incorrect test result.
c. Cable detection / test
Use both the tone generator and the cable tracer to verify where a cable is going, if it is uninterrupted or not and
where the interruption is located if it is indeed interrupted
1. Set the tone generator's mode switch (p.1 #3) to 'Tone'. Select the tone you want to hear (single or dual tone) with
the audio signal switch (p.1 #6).
2. At one end of the cable / wires to be tested, connect the red clip to any wire or one specific wire you want to test.
Connect the black clip to the ground wire or, when you cannot find it, one of the other wires. The signal indicator
LED (p.1 #5) should be red. When it is not lit, the test wire is making contact with either ground or the wire the
black clip is attached to.
3. Set the mode switch on the side of the probe (p.1 #12) to the desired signal:
"L.": lamp signal only: the signal LED lights up when the probe captures the signal.
"SP.": speaker only: a (single or dual) tone becomes audible when the probe captures the signal
"S&L": lamp + speaker: the LED lights up & a tone becomes audible when the probe captures the signal.
The sound volume is controllable with the volume control (p.1 #11).
If you do not know where the cable is going or if there are several similar cables, you can detect the correct one
with the probe. If you do know where the cable is going, the probe allows you to verify immediately at the other
end whether or not the cable is interrupted. If no signal is obtained at the other end of the cable, the test wire is
probably interrupted. Follow the cable while keeping the "Trace" button (p.1 #10) pressed to where the signal
stops ; the signal wire is interrupted at that point.
Remarks:
• The best test results are obtained when the black clip is connected to a separate ground wire.
• The probe is very sensitive: as it gets nearer the signal wire, the tone gets louder or illumination gets brighter.
• Electric fields may interfere with the detection of the signal wire.
• Always pay attention to the low battery indicators (p.1 # 4 & 9): when they light up, replace the battery of the
corresponding device promptly. A low battery may cause a signal or detection to be too weak to be noticed.
The information in this manual is subject to change without prior notice.
VTTEST11 2 VELLEMAN