CiDRA GVF-100 Gas Volume Fraction Monitoring System - Manual (Page 46)

Copyright © 2006 CiDRA Corporation Page 8-7
20639-01 Rev 03
WARNING
For Class I, Division 2 applications, Sensor Head Cable must be
installed in accordance with Article 501.10(B)(3) of the National
Electrical Code ANSI/NFPA 70:2005.
The transmitter is shipped standard with a cable gland. Replace as
local wiring requirements dictate.
8.4.2.3.1 Non-armored cable installation
Remove 10 - 12 inches (25 – 30 cm) of outer jacket from the
transmitter end of the cable. Remove the over-foil, being careful not
to damage the drain wire, to expose the 12 numbered pairs of
conductors. Strip 3/8 inch (8mm) of insulator from each conductor.
Twist each set of conductors together. It may be helpful to install wire
number markers on each of the 12 sets of conductors to readily
identify them.
Install the gland nut and gland on the cable and install in the center
hole in the bottom of the transmitter box. Tighten the gland nut on to
the cable sheathing.
The following figure shows the portion of the terminal board to which
the sensor head is connected. Each terminal block set (of 2 terminals)
is numbered to match the numbered wires found in the sensor head
cable. In addition, the colors of each wire in each of the 12 sets are
labeled on the terminal board, BLK=black and WHT=white. Insert a
3/8 inch (8mm) stripped portion of each wire into the corresponding
terminal block location and tighten the locking screw taking care to not
tighten on the wire insulation. The recommended torque for the
terminal screws is 4.4 to 5.3 lb
f
-inch (.5 to .6 Nm). The overall cable
shield wire can be attached to any one of the four SHD terminals on
this block.
Once all wires are installed, bundle them together using a tie wrap.
This will keep them separated from others wires in the transmitter box.
Figure 36 Sensor Head to Transmitter Cable Connection Terminals