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Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
(847) 541-3800
www.elenco.com
e-mail: elenco@elenco.com
MULTI-NETWORK
CABLE TESTER
MODEL TCT-255
Instruction Manual
Elenco Electronics, Inc.
Copyright © 2001 Elenco Electronics, Inc. REV-A 753067
Revised 2002
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ITEMS INCLUDED WITH MODEL TCT-255
Cable Tester
Model TCT-200
Cable Tester Terminator
Model LD-100
Soft Vinyl Case
Model C-90
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TWO YEAR WARRANTY
All Elenco models are guaranteed for two full years on
all parts and service. For the first 3 months, your cable
tester is covered at absolutely no charge. For the
remaining 21 months, a nominal service charge is
required to cover shipping and handling.
When returning merchandise for repair, please include
proof of purchase, a brief letter of explanation of
problem, and sufficient packing material. Before
returning any merchandise please call our service
department at (847) 541-3800 to obtain a return
authorization number (RMA).
Service Department
GENERAL MAINTENANCE
To clean, wipe the case with a damp cloth and detergent (do not use
abrasives or solvents).
When the Lo Batt. LED lights up, you need to replace the battery. The terminator does
not use a battery.
BATTERY REPLACEMENT
The tester is powered by a single standard or alkaline 9V battery. Use the
following procedure to replace the battery.
1. Disconnect the cables from the tester.
2. Using a phillips screwdriver, remove the battery cover screw and open
the battery cover.
3. Carefully remove the old battery and replace with a new battery.
4. Reinsert the battery into the case, dressing the battery leads so that
they will not be pinched between the case and the battery cover.
5. Reinstall the battery cover and screw.
MAINTENANCE
F to BNC Adapters (2)
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SPECIFICATIONS
CATEGORY OF CABLE
• Unshielded communication cable with RJ-11 and RJ-45 connectors.
• Ethernet 10 Base-T, Token Ring, EIA/TIA-568A/B, AT&T 258A, and
USOC.
• 50 or 75W coaxial cable with F connectors.
• 50 or 75W coaxial cable with BNC connectors. Must use F to BNC
adapters.
Maximum testing length for all cable types is 1,000 feet.
MULTIPLE FUNCTIONS
• Testing cables before or after their installation.
• Mapping Function (to test individual wire pairs or coaxial cables).
• Cable identification (straight or cross-pinning).
• Pair identification (straight or cross-pinning).
• Open/short wiring test.
ENVIRONMENTAL CONDITIONS
• Operating Conditions: 0
O
C - 45OC / 32OF - 113OF
70% RH max.
• Storage Conditions: -10
O
C - 50OC / 14OF - 122OF
80% RH max.
POWER
• Standard or alkaline 9V battery
• Low battery indicator (Lo Batt.)
• Auto power-off function (30 s)
INTRODUCTION
The TCT-255 Cable Tester is a convenient instrument for testing different
unshielded wiring schemed communication cable with RJ-11 and RJ-45
connectors and coax cable. This tester can be used for testing cables
before and/or after they are installed. The tester offers easy operation by
having to push only one button. Testing status is indicated by multiple
LEDs and an auto power-off function maximizes battery life. Soft vinyl
case provides storage for tester and terminator.
Ethernet
10Base-T
EIA/TIA-568A EIA/TIA-568B
AT&T 258A
8-Position
Token Ring
USOC 8 USOC 4
(Prs. 1&2)
USOC 6
(Prs. 1,2 & 3)
WIRING SCHEMES
(Y) 1
(G) 2
(R) 3
(BL) 4
(Y) 1
(G) 2
(R) 3
(BL) 4
1
2
3
4
1
2
3
4
(BL) 1
(Y) 2
(G) 3
(R) 4
(BK) 5
(W) 6
1
2
3
4
5
6
(BL) 1
(Y) 2
(G) 3
(R) 4
(BK) 5
(W) 6
1
2
3
4
5
6
(BL) 1
(OR)2
(BK) 3
(R) 4
(G) 5
(Y) 6
(BN) 7
(S) 8
1
2
3
4
5
6
7
8
(BL) 1
(OR)2
(BK) 3
(R) 4
(G) 5
(Y) 6
(BN) 7
(S) 8
1
2
3
4
5
6
7
8
RJ-11 (4-Wire) Straight-Pinning RJ-11 (4-Wire) Cross-Pinning
RJ-11 (6-Wire) Straight-Pinning RJ-11 (6-Wire) Cross-Pinning
RJ-45 (8-Wire) Straight-Pinning RJ-45 (8-Wire) Cross-Pinning
NOTE: Cross-pinning is for typical telephone use.
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Configuration
for Testing
Communication
Cable
Configuration
for Testing
Coaxial Cable
OPERATION INSTRUCTIONS
1. Connect one end of the cable to be tested to the terminator and the
other end to the cable tester.
2. Push the TEST (power) button and read the result.
Good Pair: Two vertical and one single blinking LEDs. The location
of the single LED indicates a straight or cross-pinning for the pair.
Open Pair: Only two vertical LEDs blinking.
Short: Four or more LEDs are blinking (two or more wires are
shorted).
3. Push the TEST button again and read the result for the next pair.
4.
For testing coax cable, use the middle LEDs (boxed in as coax on the unit).
5.
If you do not push the button for 30 seconds, it will automatically shut off.
CAUTION
DO NOT test cable connected to electric power. To avoid electric
shock, disconnect the power to the cable under test. Connection to
an active power cable can result in injury or even death.
*
*
*
*
*
*
*
*
*
Open Pair
For straight open wire #3
For Cross-Pinning open wire #6
Short
Cross-Pinned cable
short wires 6 & 7
*
= Blinking LED
*
*
*
Good Pair (Cross-Pinning)
3 & 6 Wires
Good Pair (Straight)
3 & 6 Wires
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