Fuse Finder 2
User Manual
kewtechcorp.com
1. Safety Warning
The Kewtech Fuse Finder 2 is designed for use by suitably qualified
personnel familiar with electrical supply systems.
Before using your Fuse Finder 2 please read these instructions and
safety warnings. Failure to comply with the safety warnings or use of the
unit in a manner not specified by Kewtech may result in serious injury or
damage to equipment.
When testing at light fittings or bare wires, using a fused test lead set
(not included):
If at all possible switch off the power.
Take care not to touch unshielded contacts when using the test lead
adaptor.
Connect RED or BROWN lead to live and BLACK or BLUE lead to
neutral.
Switch the power back on and test.
2. Battery installation
The Fuse Finder 2 receiver is powered by a 9V Alkaline battery (not
supplied) type PP3/MN 1604/6F22 or equivalent.
To install a battery remove the screw (take care not to lose it!) and the
battery compartment cover on the rear of the receiver enabling access to
the battery compartment.
Fit the 9V battery observing correct polarity.
Replace the cover and screw.
The transmitter is mains powered and does not require a battery.
When fitted with a new battery and turned on the ‘RCVR ON’ LED will be
solidly lit GREEN.
When the battery power becomes low the ‘RCVR ON’ LED will flash. The
battery will have approximately 20% of its capacity left at this stage and
will shortly require replacement. When in use in this almost discharged
state all of the signal strength LEDs will also flash rather than being
solidly lit as they are with a fresh battery.
USE EXTREME CAUTION.
Only use in dry conditions (see specification section).
Always prove that the transmitter and receiver are functioning before use
(see pre-use check).
IMPORTANT: Switch off your mobile phone when using Fuse
Finder as its signal could intefere with the correct operation.
www.kewtechcorp.com www.kewtechcorp.com
3. Principles of use
4. Switch functions
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.
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
6. Fuse finding process
7. Advice for best performance
Plug the transmitter into the socket under test and switch the socket on. The red
LED on the transmitter should light.
Go to the consumer unit or fuse box. Turn on the receiver. A steady beeping
tone will be emitted and the ‘RCVR ON’ LED on the receiver will light GREEN to
indicate automatic scanning mode.
Place the scanning head in contact with the face of the circuit breakers or
fuses at a right angle to the direction of the breaker body and run the scanning
head steadily along the row(s) of circuit breakers. When the receiver detects
a stronger signal the frequency of the beeping will increase to a very rapid or
continuous tone, the pitch of the beeper will increase and the signal strength
LEDs will light, climbing the bar graph. Ensure that you place the scanning tip on
the circuit side rather than the supply side of the breaker switch.
Important: Because the scanning technology used is comparative, on the first
scan of the breakers or fuses on a board the ‘MAX SIGNAL CORRECT FUSE
FOUND’ LED will often light for several different breakers. This is indicating that
the signal detected is the strongest found so far. Do not stop scanning at this
point as it may not be the strongest signal there is. It is essential to continue
scanning all of the breakers that may protect the outlet under test.
Repeat the scan of the row of breakers without pressing the reset button. With
each sweep the receiver will automatically adjust its sensitivity and disregard
weaker signals.
Continue scanning until the ‘MAX SIGNAL CORRECT FUSE FOUND’ LED is
lit only when the scanning head is over one breaker or fuse. This is the breaker
protecting the circuit that the transmitter is plugged into.
The scanning head uses a ferrite transducer to detect the signal and, like a
portable radio, varying the angle at which the receiver is held in relation to the
breaker will affect the strength of the signal received. As the receiver works by
comparing the strength of signal received from one breaker with another it is
essential to compare like with like. Observe the following for best results.
Do not let the scanning head wander around. To operate well the automatic
scanning memory needs a consistent signal so keep it in touch with the breakers
as you scan and keep the position of the scanning head a similar distance from
the breaker switch .
Keep the black scanning head at the same angle relative to the breakers or
fuses for the duration of the test.
Due to the differing designs of circuit breakers it may sometimes be unclear
from the above procedure which of two breakers the strongest signal comes
from, particularly if the maximum strength signal appears to come from a
boundary area between two adjacent breakers. In the event of this occurring one
of the following variations should enable clear identification.
a) Rotate the receiver (without resetting) through 360º to identify the
orientation in which the strongest signal is found. Reset and re-scan the row of
breakers.
b) Reset the receiver and test at the opposite (to the common boundary) edge
of each breaker. The strongest signal should come from the correct breaker.
Turn the circuit in question off and the signal strength LEDs will extinguish leaving
only the ‘RCVR ON’ LED lit and a slow steady beeping tone.
Confirm the correct breaker has been selected by checking that the red LED on
the transmitter is no longer lit.
kewtechcorp.com kewtechcorp.com
Kewtech Corporation Limited
Midas House, Unit 2b, Stones Courtyard, High Street, Chesham, Bucks HP5 1DE
T: 01494 792 212
F: 01494 791 826
E: sales@kewtechcorp.com
kewtechcorp.com
PRODUCT DATA SHEET
Standard Standard IEC 61010 250V CAT III, Double insulated
Transmitter supply 110V / 230V 50-60Hz
Transmitter current <20mA
Receiver Batteries 2 x AA Alkaline
FUSEFINDER
• Transmitter to inject a high frequency signal
on the circuit under test
• Receiver to detect circuit with signal at the
distribution board
• Clear LED indication of signal strength
FUSEFINDER
• Receiver auto-tunes sensitivity
• Scanning sensitivity reset button
• Ferrite transducer scanning head
ACCESSORIES
• Mains Lead Cable for transmitter
• Instruction Manual
• Batteries 2 xAA (not included)
SPECIFICATIONS
OPTIONAL
ACC016E: three wire distribution board leads
for connection to lighting circuits
t. 01494 792 212 kewtechcorp.com e:sales@kewtechcorp.com
Loading...