ProsKit MT-7057 User manual

CABLE SNIFFER-REMOTE
MT-7057
User’s Manual
1st Edition,2012
©2012 Copy Right by Prokit’s Industries Co., Ltd.

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Contents
1. Introduction …………………………..2
2. Safety rules and warning …………..2
3. Product features ……………………..5
4. Specifications …………………….…..5
5. Front panel ………………………….…6
6. Operation ………………………….…..8
7. Cable repair……………………………12
8. Maintenance ………………………….17
9. Accessories ………………………..…17

INTRODUCTION
The 4 in 1 cable tester tests 4 common LAN and
computer cables. It tests installed cables or patch
cords with RJ-45, RJ-11, USB, and BNC
connectors. It is intended to test cables with
straight through connections not cables with
reversed or transposed connections like some
LAN crossover cables or reverse wired telephone
cables.
SAFETY RULES& WARNINGS
1. Read all instruction in this manual before
using this tester. Failure to do so may result
in damage to the tester or injury to the user.
2. Do not use this tester with its case open, or
with parts removed. Doing so may damage
the tester and/or injure the user.
3. When using this tester in schools and
workshops, responsible teachers or skilled
personnel must control the usage of this
tester. Failure to observe this precaution may
result in damage to the tester or injury to the
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4. Follow the recommendations of any Trade
Organizations or Regulatory Agencies whose
scope encompasses the use of this tester
failure to do so may result in damage to the
tester or injury to the user.
5. Do not open this tester for maintenance
without first disconnecting it from all external
circuitry. Failure to observe this precaution
may result in damage to the tester or injury
to the user.
6. Repairs and maintenance must only be
carried out by qualified service personnel or
qualified electricians/technicians who know
the dangers of, and the safety rules
applicable to this type of equipment. Failure
to observe this precaution may result in
damage to the tester or injury to the user.
7. Do not touch the ends of the cables when
making tests. An Unexpected dangerous
potential may be present. Failure to observe
this precaution may result in damage to the
tester or injury to the user.
8. Do not apply voltage or current to any of the
tester’s connectors. Doing so many damages
the tester and /or injury the user.
9. This tester is not for use by children. Failure
to observe this precaution may result in
damage to the tester or injury to the user.
10. Do not use this tester to make
measurements in adverse environments

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such as rain, snow, fog, or locations with
steam, explosive gases or dusts.
11. Do not use tester in condensing
atmospheres. That is, do not use tester in
conditions where ambient temperature and
humidity could cause condensation of water
inside of the tester.
12. Do not use this tester if it is wet, either from
13. exposure to the weather, or after cleaning
the
14. case of the tester.
15. Do not attempt immediate use of the tester
when bringing it from a cold environment to a
warm environment. Condensation of water,
inside and outside of the tester, may produce
dangerous conditions. Allow the tester to
warm to room temperature before using.
16. Do not modify this tester. Changing the
design may make the tester unsafe and may
result in injury to the user.
17. Do not use this tester if it has undergone
long-term storage user unfavorable
conditions.
18. Do not use the tester if it has been damaged
in transport.
19. Avoid usage near strong magnetic fields
(magnets, loudspeakers, transforms, motors,
coils, relays, contactors, electromagnets, etc.)
The tester may display readings that are in
error.
20. Avoid usage near strong electrostatic fields

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(high voltage power lines, televisions,
computer monitors, etc.). The tester may
display readings that are in error.
21. Avoid usage near strong RF fields (radio or
television transmitters, walkie talkie, cellular
phones etc.).The tester may display reading
that is in error.
22. Remove the battery when the tester may be
left unused for longer than month. Chemical
leakage from the battery could damage the
tester.
PRODUCT FEATURES
1. Test 4 types of cables
2. Simple one button test
3. Ergonomic portable handheld design
4. Tests installed wiring or patch cables
5. Remote unit stores in main unit
6. 600ft test distance(RJ-45/RJ-11/BNC)
7. Convenient battery access
8. Built in battery test
9. LEDs indicate connections and faults
10. Beeper provides audible annunciation of test
results
11. Tests shielded (STP)or unshielded(UTP)
LAN cables
12. Test USB cables

SPECIFICATIONS
1.Cables Tested: UTP and STP LAN cables
Terminated in RJ-45 male connectors. (EIA/ TIA
568)RJ-11 cables with male connectors, 2 to 6
connectors installed. USB cables with Type A
flat plug on one end and type B square Plug on
other end. BNC cables with male connectors.
2.Faults Indicated: No Connection, Short, Open,
crosses.
3.Low Battery Indicator: LED lights to indicate low
battery
4.Case Dimensions:6.3x3.4x1.0 inches(LxWxH)
5.Weight:170grams,0.375Ibs (without battery)
6.Battery: 1 standard 9-volt alkaline battery.
FRONT PANEL & 4 in 1 DIAGRAM
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OPERATION
1. General Information: The 4 in 1 Cable Tester
performs its tests when the single button on its
front panel is pressed and released.6 Status
LEDs indicate the condition of the cable being
tested, as well as informing the user that
Power is turned on, and that the battery is
good (or bad).8 additional connection LEDs
light to indicate that specific wires in a cable
are connected.
Note: Only one cable can be tested at a time. i.e.
A BNC cable and an RJ-45 cable cannot be
tested simultaneously.
2. The MAIN and REMOTE unit: The 4 in 1
Cable Tester consists of a Main unit and a
Remote unit .The Remote unit stores
conveniently on the bottom of the Main unit. It
can be removed or replaced by sliding it from
left to right or right to left respectively. Use
care when removing or replacing the Remote.
Some of the plastic edges are a little sharp.
The Remote is often attached to the Main unit
when storing, when transporting, or when
patch cables are being tested. The Remote is
removed from the Main unit when an installed
(in wall, ceiling, etc.) cable is being tested.
3. Testing Patch cables:
“Patch” cables have both ends accessible at
the same location. Usually, but not always,
these cables are less than 25ft in length, and

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are not installed in a wall or ceiling. Since both
ends are accessible, one end can be plugged
into the 4 in 1 Main unit, and one end into the
Remote unit. It is not necessary to remove the
Remote unit from its docked position on the
Main unit.
4. Testing Installed cables:
To test cables installed in ceilings or walls, or
in applications that prevent the ends from
being in the same location, the Remote can be
detached from the Main unit. Once detached,
the Remote can be attached to one end a
cable, and the Main unit attached to the other
to the other end of the cable. These ends are
often in different rooms and on different floors
of a building.
5. Performing the Test:
Once the Remote and Main unit are attached
to the ends of the subject cable, as described
in 6.3 and 6.4 ,testing may begin, simply press
and release the test button on the Main unit,
observe the LED indicators, and note the
beeping sound that comes from the Main unit.
6. Interpreting the Results:
6.1 Power LED:
The Power LED should light whenever the Test
Button is pressed and released. It will stay in
for a minimum of 5 seconds, or for however
long the Test Button is pressed. If the power
LED does not light, replace the battery.

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6.2 Low Battery LED:
The power LED should slimming. If it does,
replace the battery.
6.3 No connection LED/Single Beep
If the Remote is not connected to the main
unit with a cable, or the cable has no intake
conductors, the No Connection LED with light
and the Beeper will sound once.
6.4 Connected LED/lo-Hi Beep /Numbered
LEDs
If the Connected LED lights and the Beeper
emit a Lo-Hi beep, examine the numbered
LEDs (i.e. LEDs numbered to 8 and the S
LED). Corresponding to the type of cable
being tested must light .Examine the table
below the Numbered LEDs, noting what
LEDs should light .If all of These LEDs do not
light; the cable has an OPEN fault. If all of the
appropriate Numbered LEDs light, the cable
is OK.
Note:
When testing an RJ-45 UTP cable, the S LED
must not light.
The 4 in 1 is intended to test complete cables. It
may not find faults in cables that are intentionally
incomplete. For example, the standard EIA/TIA
568 RJ-45 terminated Ethernet cables is
expected to contain 8 conductors. If only 4
conductors are used between the RJ-45
connectors. The 4 in 1 may not properly identify
the faults.

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RJ-11 cables may have 2 connections, 4
connections, or as many as 6 connections. For 2
connection cables, LED 3 and 4 must light .For 4
connection cables, LED 2,3,4, and 5 must light.
For6 connection cables, LED 1, 2,3,4,5, and 6
must light. The numbered LEDs DO NOT indicate
that a GOOD connection exists, only that a
connection exists. If the Short or Cross LEDs are
lit, there is a fault in the cable.
6.5 Connected LED/3 Beepers/Short LED/
Numbered LEDs
If the connected LED light, the Beeper emits
3 beeps, and the Short LED lights, the cable
has a fault. The Numbered LEDs indicate the
location of a short.
Note:
In the Short mode, the Numbered LEDs only
indicate the location of the shorts. The other
connections in the cable are not indicated. If
more than 3 numbered LEDs light, there may be
multiple shorts in the cable.
6.6 Connected LED/2 Beepers/Cross LED /
Numbered LEDs
If the Connected LED lights, the Beeper emit
2 beeps, and the Cross LED lights, the cable
has a fault.
Notes:
In the Cross-mode, the Numbered LEDs indicate

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connections but do not indicate the location of the
cross. RJ-11 cables used for telephone
connections are often crossed. Even new cables
are often crossed. This seldom affects the
performance of standard analog telephone lines
(POTS). Digital telephone lines and old
touch-tone phones may be polarity sensitive, so a
crossed cable may prevent then from working
properly.
CABLE REPAIR
1. General Information: The following section
provides information to the user about
common cable types, common failures and
repairs. It is not meant to be an exhaustive
study of the topic, just some basic
information that the uninitiated may find
helpful.
2. Cable damage: When a cable tests
badly, either the wire of the connectors or
both may be at fault. If the cable has been
installed and working, then it’s likely that the
wire or connectors have been abused in
some way. The wire portion of the cable can
be damaged by being crushed (under the left
of a desk), stretched (pulled sharply around a
corner), punctured (by a nail or staple), over
loaded (hit by lighting), etc. Similar abuses
will damage the Connectors on the ends of
the cable. The connectors can also be
damaged by excessive insertion and removal

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or flexing of the cable close to connector
body. While the 4 in _ can identify a bad
cable, it cannot determine if the wire or the
connectors are at fault. The user must
examine the different parts of the cable to
determine the cause of failure and take the
appropriate steps to correct the problem.
3. Which end is bad? The 4 in 1 like many
cable testers, cannot fine the location of
the fault, or even determine which end or
connector is bad. It simply knows that a fault
exists. The user must locate the fault and take
the appropriate action.
4. Cables with Molded on ends:
Many cables have molded on ends that
cannot be opened up for repair. The entire
cable must be replaced, or the molded on end
removed and replaced with a user serviceable
connector .These types of cables usually fail
from Opens or Shorts. They seldom fail from
a Crossed connection.
5. Cables with Crimped on RJ connectors:
Crimped on RJ connectors cannot be reused
or repaired. New connectors must be installed
on the cable. If the cable being tested has just
been made up or put in service, and it tests as
Open or Crossed, the RJ connectors have
probably been installed incorrectly. Short very
seldom occur as the result of a badly crimped
RJ connector, so the user should suspect a
problem with the wire (possibly a staple or

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mail through the wire, or a crushed or pinched
wire) if the 4 in 1 indicates a short. A visual
examination of the RJ connectors may reveal
the fault---but keep in mind that what-ever the
cause of a connector problem (i.e. mis-wiring
improper stripping of the wire, bad crimp, etc.)
The only solution is to replace the connector.
Consequently, it is not necessary for the user
to know the exact cause of the problem,
simply to make sure that he installs the new
connector correctly!
6. Conflicting Results: Sometimes, the tests
results of the 4 in 1 seem to conflict with the
performance of the cable---i.e., the cable
tests badly but works OK, or vice versa. The
following items list some of the reasons why.
6.1 The 4 in 1 indicates the cable is not
working, but my LAN works OK:
Installed LAN cables with RJ-45 connectors
that have been in service and working OK
may test as Open, Shorted, or Crossed.
Here’s why---The EIA/TIA 568 standard for
LAN cable only uses 4 of the wires in the
eight-wire cable. The other 4 wires in the
cable may have faults, but these will not
affect the operation of the LAN. The 4 in _
tests all of the wires in the LAN cable, and
identifies the faults, even though these wires
may not being used in the LAN system. Not
all LAN cables are wired straight through
Crossover cables used on LANs are

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purposely mis-wring, with their Receive and
Transmit wires cross over. The 4 in 1 will test
this as a bad cable, but it may work just fine
as Crossover cable.
6.2 The 4 in 1 says my cable is good, but it
does not work on my LAN:
Many cable testers like the 4 in 1 only
perform continuity style tests (open, short,
crossed, etc). Ethernet LAN cables are
constructed in a special way. The 8 wires
inside are grouped into 4 pairs of 2 way. The
8 wires inside are grouped into 4 pairs of 2
wires each. Not only must the 8 wires
connect from end to end of the cable, the
pairs in the cable must connect to specific
pins of RJ-45 plugs on to the ends of cable
ignoring the pairing (as described in EIA/TIA
568),and the cable will test ok. But when the
cable is tried on the LAN, it does not
work .This is because the lack of the
proper pairing causes excessive cross talk in
the cable, preventing the LAN from working.
This type of cable fault is sometimes call a
split pair or double split pair to detect this
type of fault, a more sophisticate tester
capable of performing a NEXT test(Near End
Cross Talk) must be used. Both the Pair
Master and LAN TDR can perform NEXT
tests.

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Notes:
Cross talk increases with the length of the cable.
A LAN system will tolerate a certain amount of
cross talk. A short cable (10ft or less) that is
improperly) paired may work just fine. However,
longer cables paired in exactly the same way,
may not work. This explains why an installer can
make short jumper cables that work (although
they are improperly paired), but when he installs
RJ-45’s in exactly the same way on a longer
cable, the cable does not work.
6.3 The 4 in 1 says my phone cable is bad, but
my phone works ok.
Most single line telephones only use 2 wires in
a modular cable the modular cable, which
terminates in RJ-11 connectors could have as
may as 6 wires in it. The unused wires may
have faults, which the 5 in 1 identifies, but
these faults may have no effect on the working
2-wrie telephone circuit. Many telephone
cables with RJ-11 plugs/jacks are wired
inverse. The 4 in 1 will show that a cable like
this is crossed. A cable like this reverses the
polarity of the telephone line. Most regular
telephones made in the last 0 years are not
polarity sensitive. So, even though the cable is
wired in reverse (crossed), it may work OK.
Early touch-tone telephones and answering
machines were polarity sensitive. If connected
in reverse polarity, the touch-tone phone may
not dial out (no touch), and the answering

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machine may not answering machine may not
answer when the line rings.
MAINTENANCE
Your 4 in 1 cable tester is a precision test
instrument and, when used as described in this
manual, should not require maintenance .there
are no internal adjustments. Calibration is not
required. To clean the outside of the tester, use a
cloth dampened with a mild detergent solution.
Do not use any abrasive cleansers or chemical
solvents that may damage the case of the tester.
ACCESSORIES
The 4 in 1 cable tester includes the following
items:
Main unit
Remote
Female BNC Terminator
Instruction Manual
Carrying Case
The group of products may be discontinued,
models specifications, price or design changed at
any time without notice and without incurring any
obligation.

4合一網路測試器
MT-7057
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一、 產品介紹：
MT-7057 是一款集 4 種測試功能於一體的多功能纜線測試
器，可測試的線材種類 RJ-45、RJ-11、USB 及 BNC, 只需
一按開關，所測試線材狀況一目了然。 線材的斷路、短
路、交錯都一一顯示在主機面板上。
適用電源：9V 電池 (不含)
二、安全注意事項：
注意：此測試器不能用於測試帶有電壓之活線，若將活線
接於此測試器，可能會造成測試器損壞。
** 使用前請細詳閱讀使用說明書，錯誤使用可能造成測
試器損壞。
** 使用時請勿將機殼打開使用或自行更換內部零件，如
此可能造成測試器損壞。
三、產品特色：
1. 可測試 4 種線材
2. 單鍵操作，簡單方便
3. 黑色噴膠外殼，握感舒適
4. 具有自動掃描檢測網絡線，檢視跳接正確性、短
路、斷路及芯線排列順序等功能
5. 具有電源狀態指示
6. 明亮清楚的 LED 燈顯示
四、產品規格：
1. 測試線材：UTP / STP / RJ-11 / USB / BNC
2. 尺寸：6.3x3.4x1.0 inches (LxWxH)
3. 重量：170 克 (不含電池)
4. 適用電源：9V 電池 (不含)