Optical Testers
Artel FiberLink 6658 Optical Length Tester

Fiberlink 6658 Optical Length Tester offers a unique, low-cost alternative for users who need to measure the length of optical fibers.

• Measures the length of both single mode and multimode fiber with accuracy of ± 2.5 meters.
• Generates a pulsed signal for use with fiber identifiers.
• Two modes of operation including Laser On mode allows the unit to be used as a 1310nm non-visible source; and Length Test mode tests the length of the optical fiber.
• Easy-to-read bright red 7-segment LED display.
• Comes equipped with industry preferred ST connectors.
• 10 hours continuous use on one 9v battery.
• Simple switch operation.
• Low -battery indicator.
• Comes equipped with a rugged and durable rubber boot to protect the instrument from drops and other hazards.

Fiberlink 6658 Optical Length Tester offers a unique, low-cost alternative for users who need to measure the length of optical fibers.

Fiber installations are increasingly required to have fiber length measurements to comply with bid requirements. Rather than purchase certification test sets that can cost thousands of dollars, the Fiberlink 6658 Optical Length Tester can be added to an installer's existing fiber test kit.

These length testers use a round-robin method of measuring fiber length. This is accomplished by looping back two fibers at one end of the fiber run with a patch cord. The round trip time that the light takes to travel through both fibers is converted to length in kilometers, then divided by two to show the length of the fiber cable. There is no need to measure the length of all the fibers; the length measurement can be applied to all fibers in the cable. This method of length testing provides accurate measurements, and saves time and money.

Measuring fiber by the jacket is an accepted method of measurement; however, there are many scenarios where this may not be valid. Length markings may be hard to reach if they are already terminated in a patch panel. Fiber links may also go through multiple cross-connects or have splices in the middle, thereby making jacket markings invalid. Optical measurement of fiber produces accurate results without the need for jacket markings.

Optical measurement also saves time by eliminating the need to estimate the length of the fiber run with a measuring wheel. This method is especially troublesome and inaccurate in networks that traverse walls, are in a star topology, or contain riser cables.

The Fiberlink 6658 Optical Length Tester uses a 1310nm infrared laser that can measure fiber links of up to 25 kilometers, is accurate to within  ±2.5 meters.