• Black Box Products
Prices listed do not include shipping and/or tax charges. Please call for quote.

Testers & Tools > Testers

click photo to enlarge


Photo may show similar product

Other views

Cable Length Meter with Fault Finding  

Measure and find faults in data, power, and communications/video cable.


Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Highlights

  • Determines cable length with 1% accuracy, identifies cable faults, and can be calibrated to the Nominal Velocity of Propagation (NVP) for any cable.
  • Holds up to two different NVP values for multiple cable tests.
  • Tests length, opens, or shorts present on voice, data, and video cables up to 3000 feet long.
  • Spread Spectrum Time Domain Reflectometry (SSTDR) works in all wire environments and is immune to voltage, current, or data disruptions.

  • Further Details

  • Produces four different tones for locating cables.
  • Able to measure cables with voltage.
  • Stores up to two NVP values.
  • Features an extra-large, backlit LCD screen with icons that clearly display test results.
  • Tests any copper cable including data, voice, video, lamp wire, and Romex®.
  • Discovers NVP value for cables with known lengths.
  • Performs automatic pre-test voltage checks.
  • Conserves power and supports long battery life with Auto-off feature and battery life indicator.

  • Common Cable Length Ranges Coaxial cable: 0-2000 feet
    Data cable: 0-1500 feet
    Electrical cable: 0-1000 feet
    Input Protection To 400 volts peak 50/60 Hz AC or DC (60V peak AC or DC). Measurement continues while warning is displayed
    Maximum Length 3000 feet on cables with low attenuation
    Measurement Method Spread spectrum time-domain reflectometry (SSTDR)
    NVP (VOP) Range 20.0 to 99.9%
    NVP Accuracy Range ±1% with known NVP and consistent cable parameters
    Operating Environment Operating temperature: +32 to +122° F (0 to +50° C)
    Storage temperature: -4 to +140° F (-20 to +60° C)
    Humidity: 10 to 90%, noncondensing
    Altitude: 10,000 ft. (3050 m) maximum
    Tone Generation (4) selectable tone cadences centered on 1 kHz; constant output amplitude of 3 Vp-p
    Voltage Warning At maximum of Safety Extra Low Voltage limits (60V peak AC or DC)
    CE Approval Yes
    Power (4) AA alkaline batteries;
    Standby: 4 years
    Active: 15 hours average
    Size 6.8"H x 3.15"W x 1.3"D (17.3 x 8 x 3.3 cm)
    Weight 12 oz. (340 g) with battery

    NOTE: Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 1-800-316-7107.


    • Cable Length Meter, with Fault Finding, User Manual
      User Manual for the CLM-FF (Version 1)

    Double Diamond Warranty
    Extended Double Diamond™ Warranty Available (3 Additional Year)

    Double Diamond™ Warranty (Standard)


    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Cable Length Meter with Fault Finding comes with a standard 1 Year warranty already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations
    ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.

    Product SKU Price Quantity
    SOHO Plus Tester SOHOTEST $145.40
    SOHO Plus Tester Kit SOHOTEST-KIT $173.70
    You can find this product in the following subcategory(s)

    Add to Cart

    Price: $307.00

    Quantity Available: 1




    Shipping Info

    In Stock - orders received before 5PM ET ship same day

    Weight: 0.912 lbs.
    HxWxD: 3.25 x 4.25 x 7.7 in.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.

    Share It   

    Got Questions?

    Call 1-800-316-7107
    ...or have us call you.

    An expert will call you in
    30 seconds. It's live and it's free.

    (U.S. and Canada Only)


    You have added this item to your cart.

    Important message about your cart:

    You requested more of "" than the currently available. The quantity has been changed to them maximum quantity available. View your cart.

    Black Box 1-800-316-7107 Black Box Network Services