Essentials for Reliable Fiber Test Results
13
The gray mandrels included with the DTX-MFM2 are
compliant with TIA/EIA-568-B for 62.5 µm fiber with a
3 mm jacket. Mandrels for 50 µm fiber are available from
Fluke Networks. Refer to the appropriate standard for
mandrel requirements if you follow other standards.
Table 1 shows a partial list of mandrel requirements for
TIA and ISO standards.
Figure 5 shows how to wrap the fiber around a mandrel.
Place mandrels on the tester’s output fibers, as shown in
Figures 8 through 15.
In the reference and test connection diagrams shown on
the tester, mandrels are indicated by a loop in the fiber.
Table 1. TIA/EIA-568-B.1 and ISO/IEC TR 14763-3 Mandrel Requirements
Fiber
core size
Standard
Wraps Around
Mandrel
Mandrel Diameter for
250 µm Buffered Fiber
Mandrel Diameter for 3 mm
(0.12 in) Jacketed Cable
50 µm TIA/EIA-568-B.1 7.1 5 25 mm (1.0 in) 22 mm (0.9 in)
ISO/IEC TR 14763-3 6.22 5 15 mm (0.6 in) 15 mm (0.6 in)
62.5 µm TIA/EIA-568-B.1 7.1 5 20 mm (0.8 in) 17 mm (0.7 in)
ISO/IEC TR 14763-3 6.22 5 20 mm (0.8 in) 20 mm (0.8 in)
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