• MEASURES AND
DISPLAYS CABLE
LENGTH IN FEET OR
METERS
• USES TDR METHOD
TO MEASURE CABLE
LENGTH VIA ITS VOP
CONSTANT
• MEASURES MOST
TYPES OF COPPER
CABLE INCLUDING
DATA, VOICE, VIDEO,
LAMP WIRE, SIAMESE,
AND NM CABLES
• CAPABLE OF
MEASURING LENGTH
TO OPEN AND SHORT
FAULTS
• EXTRA-LARGE FULL
COLOR BACK-LIT LCD
SCREEN
• BUILT-IN TONE
GENERATOR WITH
SELECTABLE TONE
CADENCE TO EASILY
TRACE CABLES WITH AN
ANALOG TONE PROBE
(NOT INCLUDED)
• CONSERVES POWER
ADJUSTABLE AUTO
POWER OFF (APO)
05/29/2020
Pair 1-2
Pair 3-6
Pair 4-5
Pair 7-8
Type
07:30 55%
CAT4UT
Library
VOP
68.3%
0.0 ft
0.0 ft
0.0 ft
0.0 ft
Home
2 m
ESPAÑOL pg. 13
FRANÇAIS p. 25
ENGLISH
GENERAL SPECIFICATIONS
The Klein Tools Cable Length Meter is a portable time domain
reflectometer (TDR) cable length meter. It measures cable length,
calibrates Velocity of Propagation (VoP) values, finds faults in cables,
and provides tone generation for cable tracing.
• Environment: Indoors
• Operating Altitude: 10000 ft. (3050 m)
• Relative Humidity: <90% non-condensing
• Operating Temperature: 32° to 122°F (0° to 50°C)
• Storage Temperature: -4° to 140°F (-20° to 60°C)
• Input Protection: 30V peak 50/60Hz AC or DC
• Common Cable Length Ranges: Coax: 0 to 2000' (0 to 610 m)
Data: 0 to 1500' (0 to 457 m) Electrical: 0 to 1000' (0 to 305 m)
• Measurement Method: Time Domain Reflectometry
• Measurement Units: Feet, meters
• VoP Range: 0 to 99.9%
• Accuracy: ± (2% + 3 ft. or 1 m) with known VoP and consistent
cable parameters
• Tone Generation: Constant: 1200Hz, Alternating: 1000/1500 Hz
To ensure safe operation and service of the meter, follow these
instructions. Failure to observe these warnings can result in
severe injury or death.
• The Cable Length Meter should NOT be used on energized cabling systems.
• Internal components of the Cable Length Meter are protected up to 30V
peak AC or DC. Connecting the meter to voltages above this range may
pose a safety hazard to the user and the meter.
SYMBOLS ON METER
Warning: Potential for personal injury.
Caution: Potential for damage or destruction to equipment.
Always wear approved
eye protection
Do not place equipment and its accessories in the trash. Items must
be properly disposed of in accordance with local regulations.
UKCA - United
Kingdom
Conformity
Assessment
Do NOT use on
energized circuits
Conformité Européenne.
Conforms with European
Economic Area directives.
Read
Instructions
Battery
type and
orientation
2
DEFINITIONS
Velocity of
Propogation
(VoP)
Velocity of Propagation (VOP) is the speed of
an electrical signal traveling through a cable,
measured as a percentage of the speed of light
BNC-Connector A BNC Connector is a common connector for a
coax cable, often associated with security systems
Time Domain
Re ectometry
TDR technology, is a technology that uses VoP
values to accurately measure cable lengths
(TDR)
FEATURE DETAILS
Front of MeterBack of MeterTop of Meter
1
07:30 55%
CABLE LENGTH METER
www.kleintools.com
6
9
12
5
NOTE: No user-
serviceable parts
inside meter.
1.
LCD Screen
2.
RJ45 Port
3.
BNC Port
4.
Battery Cover
5.
Power Button
6.
"One Dot" Button:
Select, Library,
Right Arrow
"Two Dot" Button:
7.
More, Edit, Cancel,
No, On/Off
HS
23
13
8
7
11
10
14
15
16
4
1718
8.
"Three Dot" Button - Type, Return, Home, Left Arrow, Yes
9.
Test Button
10.
Save Button
11.
Arrow Up Button
12.
Arrow Down Button
13.
Male Coax-BNC to Alligator Clips
14.
Male Coax-BNC to Female Coax-F
15.
Male Coax-BNC to Male Coax-F
16.
CAT-6 RJ45 to CAT-6 RJ45
17.
Female Coax-BNC to Male Coax-BNC
18.
Female Coax-BNC to Male Coax-F
3
ENGLISH
OPERATING INSTRUCTIONS
POWERING ON/OFF
Power ON: Press the Power Button
Power OFF: Press the Power Button
the unit off.
NOTE: Screen will display “Powering Off, Saving Data”
5
to turn the unit on.
5
for two seconds to turn
while it powers down.
Auto Power-OFF (APO): The Meter will automatically turn off after a
period of inactivity in order to conserve battery power. The time until
auto power off depends on which mode the unit is in:
Test Mode: User-adjustable from 5 to 20 minutes (default is 10 minutes).
Tone Mode: 60 minutes, not adjustable.
In either mode, the screen will dim after 1 minute of inactivity to conserve
battery power.
SETTING PREFERENCES
Editable preferences include:
05/29/2020
07:30 55%
Length Display (feet or meters),
Time, Auto Power-Off, Language
(English, German, French,
Spanish), Date, and Test Lead
Length Subtraction (when using
the included test leads).
1. Press the Power button
5
to
power-ON the meter.
2. Press the "More" button (two
7
dots)
. The "Preferences"
option will be highlighted.
3. Press the "Select" button
(three dots)
4. Use the Up
8
.
11
and Down
12
Length Unit:
Time (24hr):
Auto Off Delay:
Language:
Date (mm/dd/yyyy)
Test Lead Subtraction(1ft)
Feet (ft)
07:30
20 min
English
05/25/2020
ON
Edit
Arrow buttons to highlight
the field you wish to edit. The editable selections will turn orange.
5. Press the "Edit" button (two dots)
6. Use the Up
11
and Down 12 Arrow buttons to make changes.
NOTE: When setting the time or date, use the Right (one dot)
7
.
6
and Left (three dots) 8 arrow buttons to select the parameter you
wish to edit (i.e. hour/minute, month/day/year).
7. Press the Save button 10 to save any changes.
8. Press "Return" button (one dot)
6
to return to previous screen to
perform testing.
NOTE: Turn ON the “Test Lead Subtraction” when using the included
test leads.
NOTE: If changes to clock fail to save, an internal battery needs to
be replaced. This is a separate battery from the AA batteries that
power the unit and is NOT user-servicable. DO NOT attempt
to replace. Contact Klein Tools at 1-800-553-4676 or
customerservice@kleintools.com for further details.
4
OPERATING INSTRUCTIONS
MEASURING CABLES
Important Safety Information
• The cable to be tested should be evaluated for the presence
of voltage with a voltage measurement device by a qualified
professional before beginning work with the Cable Length Meter.
The cable should be disconnected from any voltage source before
beginning work.
• The Cable Length Meter should NOT be used on energized cable
systems.
NOTE: It is important that the included accessories be used
correctly in order to ensure quick and accurate testing. The length
of the included test leads is automatically excluded from the length
measurement. If alternate test leads are used, the length must be
manually deducted from the length displayed on the Cable Length
Meter. See SETTING PREFERENCES section to disable this option.
Measuring Coax Cable
1. The cable to be tested can be
terminated with a Coaxial BNC
connector or BNC to F test lead,
or BNC to F adapter or BNC to
05/29/2020
07:30 55%
CAT4UT
CoaxFo
VOP
VOP
68.3%
68.3%
alligator clips lead. Connect the
cable to be tested to the BNC
port on the top of the Cable
Length Meter by inserting the
connector into the port and
turning a quarter turn clockwise
to lock in place. The opposite
end of the cable to be tested
should be left unterminated
OR terminated but left
unconnected.
2. Press the Power button
power-ON the meter.
5
3. Use the Up 11 and Down
Arrow buttons to
highlight the Coaxial option and press the "Select"
to
12
Length:
Type
3.21 ft
Library
Home
key (three dots)8.
4. Press the "Library" button (three dots)8 to display stored cable
manufacturers and styles.
buttons
to highlight the desired selection, and press the "Select"
button (three dots)
in the library, refer to the Changing VoP Value / Adding New Cable
Use the Up 11 and Down 12 Arrow
8
.
NOTE: If the cable you are measuring is not
Information section.
5. Press the Test Button 9 to measure the length of the cable.
NOTE: Turn
ON the “Test Lead Subtraction” when using the included test leads.
5
ENGLISH
OPERATING INSTRUCTIONS
6. To edit Library entries, use the
highlight the desired selection and press the "Edit" button (two dots)
to enter the cable information screen. Again, use the
12
Arrow buttons to highlight the desired field and press the "Edit"
button (two dots)
7
Arrow" (three dots)
location and then use the
the desired character. Press the Save button
press the "Cancel" button (two dots)
Up 11 and Down 12 Arrow buttons to select additional fields or press
the "Go Back" button (one dot)
plug on the end that will be
attached to the Cable Length
Meter. The opposite end of the
cable to be tested should be
left unterminated, or may be
terminated with an RJ45 plug
or jack, but left unconnected.
2. Insert the RJ45 plug into the
2
RJ45 port
Length Meter.
3. Press the Power button
power-ON the meter.
4. Use the Up
Arrow buttons to highlight the Data Cable option and press the "Select"
button (three dots)
in the Cable
5
to
11
and Down
12
8
. The default Data cable choice will appear on
Pair 1-2
Pair 3-6
Pair 4-5
Pair 7-8
Type
Library
0.0 ft
0.0 ft
0.0 ft
0.0 ft
Home
the screen.
8
5. Press the "Library" button (three dots)
manufacturers and styles.
buttons
to highlight the desired selection, and press the "Select"
button (three dots)
Use the Up 11 and Down 12 Arrow
8
.
NOTE: If the cable you are measuring is not
to display stored cable
in the library, refer to the Changing VoP Value / Adding New Cable Information section.
6. To edit Library entries, use the
highlight the desired selection and press the "Edit" button (two dots)
to enter the cable information screen. Again, use the
12
Arrow buttons to highlight the desired field and press the "Edit"
button (two dots)
Arrow" (three dots)
7
8
location, then use the
the desired character. Press the Save button
press the "Cancel" button (two dots)
Up 11 and Down 12 Arrow buttons to select additional fields or press
the "Go Back" button (one dot)
7. Press the Test Button
Up 11 and Down 12 Arrow buttons to
Up 11 and Down
. Use the "Left Arrow" (one dot)6 and "Right
buttons to move the cursor to the desired
Up 11 and Down 12 Arrow buttons to select
6
to return to the Library.
9
to measure the length of the cable.
10
to save the change or
7
to discard changes. Use the
NOTE: Turn
7
ON the “Test Lead Subtraction” when using the included test leads.
6
OPERATING INSTRUCTIONS
Measuring Length to Short Faults (Category, Twisted Pair, Data Cable)
1. While measuring a twisted pair cable, if there is a short between twisted pin
pairs (i.e. a short between wires 1-2, 3-6, 4-5 or 7-8), the tester will display
"SHORT", with the distance to the short location.
2. If there is a short between two even numbered wires (i.e. a short between
wires 2, 4, 6, or 8), the tester will display "SHORT", but distance cannot be
measured
3. If there is a short between two odd numbered wires (i.e. a short between wires
1, 3, 5, or 7), the tester cannot detect a short
4. If there is a short between an even and an odd numbered wire that is not a
twisted pin pair (for example, a short between wires 1 and 4), the tester will
display "SHORT", and the distance to the short location for the even wire only
Measuring Two Conductor and Other Cable
1. Connect the BNC-to-Alligator Clips
13
test cable
the top of the Cable length Meter.
to the BNC port on
2. The cable to be measured should
05/29/2020
07:30 55%
CAT4UT
CAT5ST
VOP
VOP
68.3%
68.3%
have a pair of exposed conductors
that run side-by-side (this includes
inner pairs on twisted pair cable).
The opposite end of the cable
to be tested should be left open
(unconnected).
3. Securely attach the alligator clips
to the two exposed conductors of
the cable to be tested.
5
4. Press the Power button
power-ON the meter.
11
5. Use the Up
Arrow buttons to highlight "Other"
and Down
and press the "Select" button (three dots)
appear on the screen.
to
12
NOTE: If the cable you are measuring is not in the library,
Length:
1.23 ft
Type
8
Library
. The default cable choice will
Home
refer to the Changing VoP Value / Adding New Cable Information section.
6. Use the "Library" button (three dots) 8 to select a different cable
manufacturer or style with the correct VoP. The VoP value is displayed on the
screen in the top description.
the library, refer to the section on calculating VoP.
7. Press the Test Button 9 to measure the length of the cable.
NOTE: If the cable you are measuring is not in
NOTE: Turn ON
the “Test Lead Subtraction” when using the included test leads.
8. To edit Library entries, use the Up 11 and Down 12 Arrow buttons to
highlight the desired selection and press the "Edit" button (two dots)
enter the cable information screen. Again, use the Up
buttons to highlight the desired field and press the "Edit" button (two dots)
. Use the "Left Arrow" (one dot) 6 and "Right Arrow" (three dots) 8 buttons
to move the cursor to the desired location and then use the Up
12
Arrow buttons to select the desired character. Press the Save button
to save the change or press the "Cancel" button (two dots)
changes. Use the Up
fields or press the back button (one dot)
11
and Down 12 Arrow buttons to select additional
6
11
and Down 12 Arrow
to return to the Library.
11
7
to discard
7
to
and Down
10
7
7
ENGLISH
OPERATING INSTRUCTIONS
Measuring Length to Short Faults (cables with 3 or more conductor wires)
While measuring a cable with 3 or more conductors, to accurately
identify which wires are shorted and the distance to the short
location, multiple measurements of different wire combinations
should be measured. For example, if measuring NM 14/2 electrical
cable, the steps for testing are as follows:
1. Set up the tester as outlined in the MEASURING TWO CONDUCTOR AND OTHER CABLE section on previous page.
2. Connect the HOT and NEUTRAL wires to the red alligator clip,
and the GROUND wire to the black alligator clip. If "SHORT" is
displayed, at least one of the HOT and NEUTRAL wires is shorted
with GROUND. If "SHORT" is not displayed, there is no short
between HOT or NEUTRAL and GROUND.
3. Connect the HOT and GROUND wires to the red alligator clip, and
the NEUTRAL wire to the black alligator clip. Similarly, if "SHORT"
is displayed, at least one of the HOT and GROUND wires is shorted
with NEUTAL. If "SHORT" is not displayed, there is no short
between HOT or GROUND and NEUTRAL.
4. Connect the NEUTRAL and GROUND wires to the red alligator clip,
and the HOT wire to the black alligator clip. Similarly, if "SHORT"
is displayed, at least one of the NEUTRAL and GROUND wires is
shorted with HOT. If "SHORT" is not displayed, there is no short
between NEUTRAL or GROUND and HOT.
8
OPERATING INSTRUCTIONS
Changing VoP Value /
Adding New Cable Information
05/29/2020
Always verify that the VoP of
the cable you are measuring is
stored in the Cable Length Meter.
If it is not, check the cable box
for the information or check the
manufacturer’s website. If the VoP
can not be located, a value can be
found using a known length of the
cable in question (see Obtaining
VoP Values section).
5
1. Press the Power button
power-ON the meter.
2. Use the Up
Arrow buttons to highlight the
11
and Down
to
12
cable type to be measured and
press the "Select" button (three
8
.
dots)
3. Press the the "Library" button (three dots)
12
Arrow buttons to highlight the row to be corrected. At the
Down
07:30 55%
Cable Must Be
!
Connected
Type:
Pair:
VOP:
Length:
Name:
Manufacturer:
8
and use the Up 11 and
Coax
1
70%
5
_______
_______
Cancel
end of the list, “Add New” allows you to add a new cable without
changing any of the existing default known cable values.
4. Press the "Edit" button (two dots) 7.
5. Use the Up 11 and Down 12 Arrow buttons to highlight the VoP and
"Edit" button (two dots) 7.
press the
6. Use the "Left Arrow" (one dot)6 and "Right Arrow" (three dots)8 to
highlight the numbers to be changed, and use the Up
Arrow buttons to increase or decrease the numbers until they display
11
and Down
12
the value you have obtained.
7. Enter/edit the Name, Manufacturer, and Impedance values as needed.
8. Press the Save button 10 to save changes.
“Save successful” will
display on the screen.
8
9. Press the "Return" button (three dots)
to return to testing.
Obtaining VoP Values
There are three ways to obtain VoP values for a cable:
1. VoP values for the most common cable types are included in the Cable
Length Meter. They can be estimated based on these values or using
the chart on page 11.
2. The VoP can usually be obtained by checking the cable specifications
or contacting the manufacturer.
3. The VoP can be found using a known length of the cable that will
be used during testing (see Determining an Unknown VoP Value
section).
9
ENGLISH
OPERATING INSTRUCTIONS
Determining an Unknown VoP Value
Follow these instructions to set the Length Constant based on a sample cable
of known length. The Cable Length Meter can calculate a VoP from a test cable
length of 25 to 1000 ft. (10 to 300 m). Longer cable lengths will give more
accurate results. It is recommended to use at least 50' (20 m).
1. Prepare a length of the same type of cable for which you need to determine the VoP.
2. Determine the actual length of the test cable length using the markings on the
cable, a tape measure, laser distance meter, etc.
3. Connect the test cable length to the Cable Length Meter as described in
“MEASURING CABLES” section.
4. Press the Power button
5. Press the "More" button (two dots)
6. Use the Up
11
and press the "Select button" (three dots)
7. Press the "Select" button (three dots)
8. Press the "Edit" button (two dots)
buttons to select the cable type to be edited, and press the "Save" button
9. If testing data cable, use the Up
pair to be used for the test. Press the "Edit" button (two dots)
pairs, then press the Save button
cable types, skip this step.
10. Use the Up 11 and Down 12 Arrow buttons to select the VoP percentage value. Press
the "Edit" button (two dots)
changed. Change the VoP percentage value by using the Up
9
, and Right (one dot) 7 Arrow buttons until the value for the Length is the
dots)
correct value. then press the Save button
11. Use the Up 11 and Down 12 Arrow buttons to select the Name and Manufacturer
selections. Press the "Edit" button (two dots)
to the new known VoP, then press the Save button
5
to power-ON the meter.
7
and Down 12 Arrow buttons to highlight "Calibrate VoP/Length"
.
8
.
8
.
7
and use the Up 11 and Down 12 Arrow
11
and Down 12 Arrow buttons to select the wire
10
to complete the change.
7
and the first digit will blink, indicating that is able to be
10
to complete the change.
7
to create a name and assign a manufacturer
10
11
to complete the change.
10
7
to change the pin
NOTE: For all other
, Down 12, Left (three
.
Toning Data Cable
2
1. Insert RJ45 cable into RJ45 Port
cable to be toned.
2. Press the Power button
3. Use the Up
4. Press the "Select" button (three dots)
5. Use the Up
11
and Down 12 Arrow buttons to select "Tone".
11
and Down 12 Arrow buttons to select "Data" and press the "Select"
8
button (three dots)
.
6. Toning will default to "OFF" for each of the pairs. Use the Up
buttons to select the desired pair(s) and press the "Edit" button (two dots)
or use Alligator Clips 13 to connect to wires in
5
to power-ON the meter.
8
.
11
and Down 12 Arrow
7
to
scroll through OFF, 1200, 1000/1500Hz warble for each pair (multiple pairs can be
toned at the same time by selecting a tone frequency for each pair to be tested).
7. With toning turned on, use the Up
1200Hz or 1000/1500 Hz warble for each pair (multiple pairs can have tone enabled
11
and Down 12 Arrow buttons to select
simultaneously; select desired tone frequency as described above).
Toning Coax and Other Cable
5
1. Press the Power button
2. Use the Up
3. Press the "Select" button (three dots)
4. Use the Up
11
and Down 12 Arrow buttons to select "Tone".
11
and Down 12 Arrow buttons to select "Coaxial" or "Other", and press
the "Select" button (three dots)
5. Toning will default to "OFF". Press the "Edit" button (two dots)