Fluke DTX-MFM2 User Manual page 19

The gray mandrels included with the DTX-MFM2 are
compliant with TIA/EIA-568-B for 62.5 m fiber with a
3 mm jacket. Mandrels for 50 m 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.
Table 1. TIA/EIA-568-B.1 and ISO/IEC TR 14763-3 Mandrel Requirements
Fiber
core size Standard
50 µm TIA/EIA-568-B.1 7.1
ISO/IEC TR 14763-3 6.22
62.5 µm TIA/EIA-568-B.1 7.1
ISO/IEC TR 14763-3 6.22
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.
Wraps Around Mandrel Diameter for
Mandrel 250 µm Buffered Fiber
5
5
5
5
Essentials for Reliable Fiber Test Results
Mandrel Diameter for 3 mm
(0.12 in) Jacketed Cable
25 mm (1.0 in)
15 mm (0.6 in)
20 mm (0.8 in)
20 mm (0.8 in)
22 mm (0.9 in)
15 mm (0.6 in)
17 mm (0.7 in)
20 mm (0.8 in)
13