4
WIRING
All electronic options are associated
with a matching style of meter
cover plate. This cover plate has
four threaded ports, compatible
with PG7 threads, for gaining wiring
access to the electronics inside the
cover plate. The meter is shipped
with the ports environmentally
sealed with a threaded plug and
seal. Remove one or more of
these plugs as required to install
the supplied port ttings below.
Each meter is supplied with cable
gland strain reliefs with O-rings and
1/2 NPT adapters with seals for use
in the threaded ports of the meter
cover plate. Select the port ttings
that t your process and replace
the threaded plugs in the cover
plate with the ttings as required.
The threaded plugs installed at the
factory may be left in any unused
cover plate port indenitely.
It is recommended that a
“removable” thread-locker (uid,
stick, tape, spray, etc.) be used
when installing the strain reliefs or
adapters into the cover plate ports.
Strain Reliefs:
The cable gland strain reliefs will
accommodate a cable diameter of
0.11 - 0.26 inches (2.79 - 6.6mm)
and provide an environmental
seal around the cable when
the dome-nut is tightened.
NPT Adapters:
The 1/2 NPT adapter ttings
are used for attaching ex
conduit to the meter, for those
applications that require cable
runs to be enclosed in conduit.
• Cable to be provided by
customer to accommodate
job requirements. Cable is
not included with meter.
ISOLATED POWER SUPPLY
WIRING
The QSE meter has an internal
connection to the conductive uid
through one of the electrodes.
The uid and/or plumbing in most
applications should be earth
grounded to prevent any static
buildup and provide a proper
grounding for the system. Therefore,
the power supply connection to
the QSI should have an earth
ground isolated output to prevent
ground loop currents. Failure to
use an isolated power supply
could result in ground faults and
could cause accuracy issues
caused by stray voltages due to
the ground loop currents. Proper
grounding is a requirement.
The wire gauge for the power supply
cable should be between 16 to
26 AWG to properly t in the wire
termination connector. The external
power supply used for supplying
power to the QSI should be rated
for a minimum of 0.25 Amps.
The power supply polarity is not a
requirement for either the DC or AC
supply types as long as the supply
is properly earth ground isolated.
