Arkon Channelmag - Manual (Page 21)

21
The Junction Box
The cable ends and the junction box supplied for multi-Channel Mag systems are to
NEMA 6 and IP68 for permanent submersion to 30 feet (10m) water column. As
such, the cable ends are supplied with shrink-fit sleeves. It is important not to cut
these sleeves off during storage, as they prevent moisture permeating the cables
ends. Moisture in the cables causes signal instability. Cut the sleeves off only prior to
wiring into the transmitter. Cables must be split not more than 1” (25mm) from the
terminal entries of the transmitter. Do not coil excess cable to avoid false inductance.
2.6.2 ChannelMag
Entela Approval
ChannelMags are Entela Approved For Class 1, Div. 2 or European Zone 2 Areas:
1. For a single ChannelMag sensor or remote junction box for use with multiple
ChannelMags sensors used in applications Entela approved to CSA and NEC standards
for Class 1, Division 2 areas, or the European ATEX Zone 2 areas, the remote 4411e
transmitter must be used in the safe area. It is a requirement of approval for CSA and NEC
that cables must run in conduits for the connection of the ChannelMag sensor(s) to the
transmitter. Conduit connectors are provided for this. For ATEX Zone 2 requirements
conduit is not necessary.
2. For a single ChannelMag sensor or remote junction box for use with multiple
ChannelMag sensors that are Entela approved to ATEX Zone 2 standards, it is conditional
that the reference coil, exciter coil and electrode cables emanate from 3 separate cable
glands. Alternatively, the reference coil and exciter coil may run in a 4-core cable,
consisting of 2 x 2 core, each pair individually shielded and where the 2 core shielded
electrodes cable is separated from it. All such cables must be IEC approved and is
normally supplied by ARKON. The IEC cables may have identification other than black
and white, but they will be clearly labeled.
3. All ChannelMags and junction boxes must be potted with 3M re-enterable gel type 4442
or type 8882. This is normally supplied with a junction box for each system.
Dual ChannelMag sensors are normally supplied with a remote dual entry junction box and is
wired as shown below. For single sensor ChannelMags Sensor 2 on the diagram is omitted.
2.7 Cable Runs From Cables running greater than 30 feet (10m) after the junction box to the transmitter must have the
electrode pair cable separated from the exciter coil pair cable by a minimum of 2 feet (0.5m). The
reference coil pair cable may be run in the same conduit as the electrode pair cable. The maximum
cable length is limited to 300 feet (100m). See Section 2.5.