3. Principles of use
The Kewtech Fuse Finder 2 enables the speedy identification of which breaker or
fuse is protecting a circuit. The transmitter uses the mains supply to generate
a modified high frequency signal into the live conductor that can be detected by
the Fuse Finder receiver. The signal will not adversely affect other equipment but
is powerful enough to work over cable runs of several hundred metres.
The scanning head uses a ferrite transducer to detect the signal and when
placed on breakers that are connected to the live supply under test will indicate
the presence of the signal.
To obtain the best results from your Fuse Finder 2 it is helpful to understand that
the signal strength indicator is comparative rather than absolute. This means
that each press of the ON/RESET button resets the sensitivity to maximum and
the receiver will respond when placed in close proximity to any breaker or cable
carrying the signal. During a test the receiver will auto tune its sensitivity to
the strongest signal encountered since the reset button was last pushed. It is
therefore necessary to ensure that all of the breakers that could be protecting
a circuit are scanned at least twice and that you do not stop as soon as a
maximum strength signal is indicated.
4. Switch functions
Transmitter
There is no switch for the transmitter. It will automatically start the injection of
the test signal upon connection to a mains supply.
Receiver
The membrane switch on the receiver has 3 functions – On/Reset/Off.
Push and immediately release the switch when the receiver is off – this will turn
the unit on with a steady bleeping and green ‘RCVR ON’ LED indicating that the
scanning function is in progress.
Push and immediately release the switch when the receiver is on – this will reset
all scanning function memories to zero, ready to start again, with a steady
beeping and ‘RCVR ON’ LED. Always use the reset function away from the
distribution board so that no signal is present during reset.
Push and hold switch down for over 1 second – this will turn the receiver off.
Note: To maximize battery life an auto-power off function is incorporated in
the receiver which will turn the receiver off after three minutes of inactivity. To
resume testing after this period just turn the unit on as described above.
5. Pre-use check
Before each use of your Fuse Finder 2 you should prove that the unit is
functioning correctly. To do this switch the receiver on and firstly check that the
bottom LED is GREEN and a steady beeping tone is emitted. If either of these
functions is not present replace the battery in the receiver before proceeding.
Connect the transmitter to the mains and move the receiver scanning head
over the face label of the transmitter. There will be ‘hotspots’ on the transmitter
label where the frequency of the beeping will become very rapid or change to a
continuous tone and all 5 of the signal strength LEDs will light.
If this indication can not be obtained the unit should be withdrawn from service
and returned to Kewtech for examination.
kewtechcorp.com
kewtechcorp.com
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