Omega Products CDE-45T1 Installation Manual
T
PRODUCT INSTRUCTION SHEET
CDE-45T1 and CDE-45T3 Toroidal Conductivity Sensors
Introduction
®
®
Modern conductivity measurement devices include a class of
sensors which use an electrodeless system to determine the
conductivity of a fluid. Electrodeless probes function by first
exciting a toroid with an AC voltage to produce a magnetic
flux in the core. This flux then produces an alternating current
flow in the fluid, which passes as a loop through the center of
the core. A second toroid then acts as a sensor by using the
fluid’s current to produce a magnetic flux in its core which,
in turn creates current flow in its windings. The current flow
in the fluid and subsequently the detector toroid’s windings,
depends on the conductivity of the solution, thereby giving an
accurate measurement without contacting the fluid directly.
Your Electrodeless Conductivity Sensor provides a very linear
voltage output signal versus the conductivity of the solution
within which it is placed. The overall output is proportional to
the excitation signal driven into the driver toroid, the amount
of gain provided by the output signal amplifier, and the
conductivity of the medium being measured. Thus, calibration must be done with a known conductivity solution and the
electronics.
Mechanical Installation
Your toroidal sensor can be installed in 2 ways:
FIG. 1
FIG. 1
FIG. 2
O-RING
SEAL
FLOW DIRECTION
ARROWS x 2
OWARD SENSOR
ALIGNMENT TAB)
(POINT
SENSOR
ALIGNMENT
NOTCH
SENSOR
ALIGNMENT
TAB
1. Submersion mount: Mount sensor into rigid or flexible
conduit using a 3/4" NPT coupling and attaching to the 3/4"
NPT threads near the sensor's cable. Be sure to seal conduit to
avoid fluid build up in conduit.
2. In-Line mount:
a. Plumb flow cell CDTX-45T-PT into line. Flow cell is provided
FIG. 3
with 2" slip fittings. For threaded connection install a 2" slip x
NPT female adapter (CPVC SCH 80).
b. Install o-ring into CDTX-45T-PT as shown in FIG. 1
NUT
c. Install CD-45T1 toroidal sensor into CDTX-45T-PT. Match
notch on flange of sensor with tab of flow cell as show in FIG. 2.
d. Install nut onto threads of flow cell and turn clockwise. DO
NOT USE TEFLON TAPE OR SEALANT ON THREADS!
CDE-45 Page 1 of 4
PRODUCT INSTRUCTION SHEET
Sensor Wiring
®
The probe has 9 total leads (see FIG. 4).
The driver toroid is connected to the red and black leads with
the red shrink tubing around them. When using the probe
with various controllers, it is important that the red lead be
connected to an AC DRIVER or VOLTAGE IN position while the
black lead is connected to a GROUND or DRIVER RETURN line.
The detector toroid is connected to the white and black leads
with the white shrink tubing around them. The white lead is
typically connected to the SIGNAL IN location and the black
lead is connected to a GROUND or SIGNAL RETURN line.
The temperature element is connected to the green and black
leads with the green shrink tubing around them. Connect
these to the TEMPERATURE INPUT locations. The polarity is not
important.
The 3 bare leads, which supply individual pair shielding
throughout the cable, should typically be connected to a
ground or drain line. Note: The shield leads are not connected
to one another, they are all individual shields for the three
bundles of wires.
Refer to your controller manual for specific wiring details.
FIG. 4
CDE-45T1
Cable Considerations
The cable uses PVC to protect the wires during use. If the cable
comes in contact with the working fluid, the temperature and
pressure ratings must be adjusted to allow for the lower temperature limits of the cable.
C (DRY) but should only be subjected to 70 deg C when immersed in a fluid.
by liquid (raising the possibility of shorting) and all attempts
should be made to keep the cable out of the fluid environment. Do not run cable in the same conduit with any other A.C.
power wiring nor routed close to any high current demanding
equipment. Seal conduit to avoid build-up of moisture. Do not
cut cable. Shorter or longer cables can be provided.
The jacket becomes significantly weakened
The cable can withstand 105 deg
CDE-45 Page 2 of 4
Loading...