zShop MS-20SF Fuse Finder Instruction Manual
- June 6, 2024
- zShop
Table of Contents
zShop MS-20SF Fuse Finder
Meter Description
RECEIVER
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Scanning Head
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LED indicator , light red during auto scanning.
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Signal LED indicator, light green for correct.
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Buzzer , Bleeps to indicate auto scanning and Rapid or continuous tone to indicate correct breaker found.
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ON/OFF/RESET button , Press and hold to switch off, Press and release to switch on or reset during scanning.
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Battery cover
TRANSMITTER -
GFCI test button
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RED LED indicator
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 beeping and red 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 red 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. (Press and release to switch on or reset, Press and hold to switch unit off.)
Safety
This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter.
WARNING: This WARNING symbol indicates a potentially hazardous situation,
which if not avoided, could result in death or serious injury.
CAUTION: This CAUTION symbol indicates a potentially hazardous situation,
which if not avoided, may result damage to the product.
This symbol indicates that a device is protected throughout by double insulation or reinforced insulation.
Specification
For use on 110v 50Hz Mains supply
Current consumption: <20 mA.
Auto power oll: Receiver Meter automatically shuts down after approx. 3
minutes of inactivity.
Operating temperature: o·c to 40 •c (32°F to 1 04 °F) at < 80 % relative
humidity.
Storage temperature: o •c to 50 •c (32°F to122 °F) at < 95 % relative
humidity.
Relative humidity: 95% (0°C to 30°C)
Power: One 9V battery, NEDA 1604, IEC 6F22.
Operation
WARNING
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Socket & See Fuse is designed for use by suitably qualified personnel familiar with electrical supply systems.
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Before using your Fuse finder please read these instructions and safety warnings.
Failure to comply with the safety warning or use of the unit in a manner not specified by — Tech may result in serious injury or damage to equipment. -
To testing at light fittings or bare wires if at all possible switch off the power before making connections or disconnecting.
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Don’t touch unshielded contacts when using the test lead adaptor.
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Protect red lead to live and black to neutral. Switch the power back on. Test method as above.
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Please use in dry conditions
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Before use prove that unit is functioning correctly.
Function check
Before use prove that unit is functioning correctly. To do this switch the
receiver on and firstly check that the LED is red and a steady beeping tone is
emitted.
If either of these functions is not present replace the battery in the
receiver before proceeding. When battery power is low the green led flashing
and the beeping tone will have a longer duration, then the meter shut down
quickly. The battery will have around 20% of its capacity left at this stage
and will shortly require replacement.
Connect the transmitter to the mains and move the scanning head over the face
of the transmitter.
The frequency of the beeping should become very rapid or change to a continuous tone and the LED should turn Green when the scanning head is detecting a signal “hotspot” (this is good practice for scanning ,as the indication is similar to finding the correct fuse at the board.)
Run the scanning head over the transmitter to check the fuse Finder is operating correctly).
Advice tor best performance
Due to the differing designs of circuit breakers it may sometimes be unclear
from the above procedure which of two breaks the strongest signal comes from,
particularly if it appear to come from a boundary area between two adjacent
breaker. In the event of this occurring one of the following variations should
enable clear identification.
-
Scan the breaker on the opposite side of the switch (after resetting the receiver).
The strongest signal may be found at the top of the breaker.
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Rotate the receiver (after resetting) through 90to set the black pips on the insert of the red scanning head to come towards being in line with the breaker. At some point a stronger signal will be found-scan at the new angle .
Fuse finding process
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Plug the transmitter into the socket under test and switch the socket on. The red LED on the transmitter should light.
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Go to the consumer unit or fuse box .. Turn on the receiver. A steady beeping tone will be emitted and the LED on the receiver will light red to indicate automatic scan.
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Place the scanning head in contact with the face of the circuit breaker or fuses at a right angle to the direction of the breaker body and run the scanning head steadily along the row of circuit breakers .The frequency of the beeping will increase to a very rapid or continuous tone and the LED will tum from red to green when the receiver encounters a stronger signal.
(Continue scan slowly across the face of the circuit breakers or fuses)
(Sometimes we have noticed some problem When the receiver is getting closer to correct circuit breaker, the red LED start flashing and there is no LED indication for long time after detecting circuit breaker.
These are normal.
Because the receiver in search and search for weak signal, We can press the RESET key, new search for signals. And then you get the strongest signal, the red light turn off, green LED lighting and continuous tone.)
Important the first stronger signal you encounter may not be the strongest there is.
Do not stop scanning when a stronger signal is first encountered. Because the scanning technology used is comparative, it is essential to continue scanning all ol the breaker that may protect the outlet under test. -
Repeat the scan of the row of breaker. With each sweep the receiver will automatically adjust it is sensitivity and disregard weaker signals.
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Continue scanning until the correct indication (rapid or continuous tone and LED lit green) is given only when the scanning head is over one breaker or fuse. This is the breaker
protecting the circuit that the transmitter is plugged into. -
Turn the circuit in question off and the receiver will revert to a red LED display and steady beeping.
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Confirm the correct breaker has been selected by checking that the red LED on the transmitter is no longer lit.
Sometimes we have noticed a problem (mainly occurring on split distribution boards).
Some fluorescent light fitting circuits give an inconsistent amplifying effect
to the detection signal resulting in a false signal. But obviously, the
breaker concerned will be rated
considerably less than the typical rating of breaker feeding socket outlets,
so can safely be ignored.
Principles of automatic scanning
- 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.
- Keep the red scanning head at the same angle relative to the breaker or fuses for the duration of the test.
- Keep the head in contact with the breaker during each sweep to ensure consistency in the proximity of the head to the breaker.
- Test only the same side of each breaker during a test. Pay particular attention to this when testing a vertically hung panel which may have neighboring breakers mounted in opposite directions.
- Always reset the receiver (away from the distribution board) before changing any test condition.
Maintenance
Battery installation
- The fuse finder receiver is powered by a 9v battery or equivalent.
- To install a battery remove the screw (do not lose it!) and cover on the rear of the receiver enabling access to the battery compartment.
- Fit the 9v Battery observing correct polarity.
- Replace cover and screw.
- The transmitter is mains powered and does not require a battery.
- When battery power is low the beeping tone will have a longer duration. The battery will have around 20% of its capacity left at this stage and will shortly require replacement.
- Remove screw(do not lose it) and slide off cover to replace batteries.
Cleaning
Wipe the exterior surface of the transmitter and receiver with a damp cloth or
cleansing wipe. Do not use solvents. Ory thoroughly before use.
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