Sensor cable verification and test
FiberPatrol FP1150 Product Guide
Page 63
Sensor cable verification and test
Before making the splices to the connection module in the equipment room and the end modules
do a continuity check of all spliced fibers and OTDR test the two sensor fibers (S1 and S2).
Continuity test
Use a visual fault locater (VFL) to verify continuity in S1 an S2, as well as any dark fibers that were
field spliced during the cable installation.
OTDR test
Before splicing the sensor fibers in the connection module and the end modules test the two
sensor fibers from both ends of the cable with an OTDR at the following settings:
wave length = 1550 nm
pulse width = 100 ns
average time = 2 min.
splice loss
0.03 dB (typical)
range
cable length
Calculate the average loss per km from each end of the sensor cable and use the higher reading.
The maximum loss must be 0.25 dB per km or less for up to 80 km of cable; or 0.24 dB/km or less
for up to 100 km of cable (TPI).
Control equipment installation
The FiberPatrol electronic control components are designed to be installed in an EIA 19 in.
equipment rack. The rack requires a mounting depth of 20 in. (51 cm) plus a minimum 2 in. (5 cm)
of front space between the equipment and the rack doors and at least 6 in. (15 cm) of rear space
for cables and ventilation. The overall depth of the rack must be a minimum of 28 in. (71 cm). Both
the front and back of the equipment rack must be accessible for a technician to make the cable
connections and to access power switches and reset buttons. The FiberPatrol electronic control
components require 6 contiguous rack units (RU) beginning at least 12 in. (30 cm) above the floor.
The sensor unit occupies 4 RU, the fiber connection module 1 RU, and the optional rack-mount
keyboard/monitor/mouse 1 RU.
The FiberPatrol sensor unit operates on 100 to 240 VAC 50/60 Hz and consumes 200 W
maximum. The sensor unit requires 2 independent AC receptacles. An additional AC receptacle is
required if the optional rack-mount keyboard/monitor/mouse is being used at the site.
CAUTION
Critical losses in the sensor cable discovered by OTDR testing must be
investigated and rectified before making the connection module and end
module splices.
Note
It is strongly recommended that the FiberPatrol control equipment
components be powered through a UPS system.
