Omega Products CDCN-90A Installation Manual
Chapter Page
1 Introduction 1
1.1 General Description 1
1.2 Front Panel Description 2
1.3 Rear Panel Description 3
2 Sensor Selection and Installation 4
2.1 Sensor Selection 4
2.2 In-Line Sensor Installations 6
2.3 Submersible Sensor Installations 8
3 Installation and Wiring 9
3.1 Mounting Instructions 9
3.2 Power Connections 10
3.3 Input Connections 11
3.4 Output Relay Connections 12
3.5 Verifying Analog Outputs 13
3.6 Analog Output Connections 14
4 System Configuration 15
4.1 Introduction 15
4.2 CAL Menu Functions 16
4.3 RELAY Menu Functions 18
4.4 OUTPUT Menu Functions 19
4.5
4.6 CAL Menu 22
4.7 Wet Calibration Procedure 24
4.8 Relay Operation 25
4.9 RELAY Menu 27
4.10 OUTPUT Menu 29
4.11 View Only Menus 30
Quick-Reference Keypad Sequence
20
Table of
Contents
5 Technical Support 32
5.1 Accessing Internal Options 32
5.2 AC Power Configurations 33
5.3 Security Code Function 33
5.4 Installing Input/Output Options 34
5.5 Output Card Configurations 34
5.6 Options and Accessories 35
5.7 Parts Per Million Conversion Factor 36
5.8 Temperature Coefficient 37
5.9 Troubleshooting 39
Specifications 42
Warranty Information 45
Important Safety Information!
CAUTION: Remove AC power to unit prior to
wiring input and output connections.
CAUTION: Remove AC power before opening
unit. Electrical shock hazard exists
Unpacking and Inspection
Your controller package includes the following
items:
• OMEGA CDCN-90A Conductivity/Resistivity
Controller
• Two stainless steel mounting brackets
• Mounting Instructions w/self-adhesive template
• Panel gasket
• Instruction manual w/warranty card
Please fill out and return warranty card as soon as
possible.
Warranty Record
For your protection, record your unit's purchase
date and serial number for future reference. The
serial number decal is located on the instrument's
rear panel.
Model: OMEGA CDCN-90A Conductivity/
Resistivity Controller
Purchase Date: _______________________
Serial Number: ________________________
Purchased From: _______________________
Purchase Order Number: _______________
1.1 General Description
The OMEGA CDCN-90A Conductivity/Resistivity
Controller is specifically designed to monitor and
control conductivity levels of aqueous solutions.
The controller's compact 1/4 DIN enclosure (front)
is NEMA 4X/IP65 rated and ideal for installations
into instrumentation panels with limited space.
Optional "plug-in" output cards allow you to
customize your controller to satisfy your application
demands. The controller's unique "slide-out"
chassis design makes option installation fast and
simple. Smart self-configuring microprocessor
based circuitry automatically inventories installed
options during power-up, allowing you to upgrade
your system in seconds without the need for
additional equipment.
The unit's front panel features a highly visible
4.5 and 8-digit liquid crystal display with
adjustable contrast. Measured conductivity/
resistivity and relay status is accessed at a glance.
Channel selection and solution temperature is
accessed with a touch of a button. During
calibration the user is prompted with clear
step-by-step instructions on the front panel display.
Chapter 1
Introduction
The CDCN-90A is designed for use with OMEGA
CDCE-90 series conductivity/resistivity sensors,
covering a wide range of conductivity/resistivity
measurement. Each sensor is equipped with a
PT1000 temperature compensation device for
accurate temperature sensing (sec. 2.1).
The technical data given in
this publication is for general
information purposes only. It
implies no warranty of any
kind.
1
1. Relay
Annunciators:
1.2 Front Panel Description
CONDUCTIVITY/RESISTIVITY CONTROLLER
RLY 1
RLY 2
1
RLY 3
RLY 4
2
4
5
6
ENTER MOD
CAL RELAY OUTPUT
FunctionItem
• Indicate activation status of control relays 1-4 (optional)
COND
RES
% REJ
TEMP
®
103
9
8
7
2. LCD
Display:
3.
4.
5.
6.
7.
8.
9.
10.
2
MOD
ENTER
CAL
RELAY
OUTPUT
TEMP
% REJ
COND
RES
• Shows conductivity, resistivity, temperature °C, relay activation status, and
user messages during setup and operation
• Accesses one of three calibration menus: CAL, RELAY, OUTPUT
• Selects a menu item for modification
• Restores a menu item to previous value during modification
• Stores calibration and setup values into memory after modification
• Displays available output options during operation
• Used in conjunction with MOD key to access the CAL calibration menu
• Accesses the CAL "view-only" menu
• Used in conjunction with MOD key to access the RELAY calibration menu
• Accesses the RELAY "view-only" menu
• Used in conjunction with MOD key to access the OUTPUT calibration menu
• Accesses the OUTPUT "view-only" menu
• Displays temperature in °C for each channel during operation
• Decreases the value of a selected digit in CAL, RELAY, or OUTPUT menus
• Displays percent rejection between channels
• Increases the value of a selected digit in CAL, RELAY, or OUTPUT menus
• Displays conductivity/resistivity for each channel during operation
• Selects a digit for modification while in CAL, RELAY, or OUTPUT menus
• Returns the unit to operation mode from menus
1.3 Rear Panel Description
10 9 8 7 6
RLY3
RLY4
C NO Tx GND Rx
1 2 3 4 5 6 7 8 9 10 11 12 13 14
R+ R-
SERIALANL2
CH2
S2 T2
CH1
S1 T1 SG CNO
Note:
Rear terminals accept
18 to 22 AWG wire
15 16 17 18 19 20 21 22 23 24 25 26 27 28
L1
N
AC IN
Function
1
• 90 to 132 VAC or 180 to 264 VAC system power
NO C NC
+ GND
RLY1DC IN
2 3 4
NO C NC
RLY2
R+ R-
ANL1
5
Item
1. AC IN
connection
• 17 to 30 VDC system power connection
• Relay #1 (COM, NO, NC) contact set for external device
2. DC IN
3. RLY1
control (optional)
• Relay #2 (COM, NO, NC) contact set for external device
4. RLY2
control (optional)
• Analog output #1 from option socket #1 (optional) 5. ANL1
• Sensor input connections
• Serial outputs (future availability)
• Analog output #2 from option socket #2 (optional)
• Relay #4 (COM, NO) contact set for external device
control (optional)
• Relay #3 (COM, NO) contact set for external device
control (optional)
6. CH1/CH2
7. SERIAL
8
. ANL2
. RLY4
9
10. RLY3
3
Chapter 2
Sensor Selection
and Installation
Dimensions:
• CDCE-90-001 Sensor
• CDCE-90-01 Sensor
• CDCE-90-1 Sensor
4.6 m (15 ft.)
cable (standard)
152 mm
(6.0 in.)
Reversible
fitting assy
for submersion
mounting
3/4 in. NPT
(standard)
2.1 Sensor Selection
The CDCN-90A controller is compatible with
CDCE-90 series sensors. OMEGA Engineering
offers five sensor versions satisfying a wide range
of measurement, listed below.
For optimum sensor performance and life, the
following requirements MUST be met:
• Verify your system's conductivity/resistivity
range.
• Verify the maximum pressure/temperature
specification for the sensor under consideration
is within your process range.
• Verify wetted sensor parts are chemically
compatible with process fluids (e.g. Compass
Corrosion Guide or equivalent).
Choose the OMEGA Engineering sensor best
suited for your application from the following:
Order NPT Fitting
Number Cell Range Fitting Material
CDCE-90-001 0.01 0.055 - 100 µS 3/4 in. PP
(10 kΩ-18 MΩ
CDCE-90-01 0.1 1 - 1000 µS 3/4 in. PP
CDCE-90-1 1.0 10 - 10,000 µS 3/4 in. PP
Specifications
Temperature Compensation: PT1000
)
107 mm
(4.2 in.)
12.7 mm
(0.5 in.)
4
CDCE-90-01
sensor tip
CDCE-90-1
sensor tip
Wetted materials:
O-rings: EPR
Insulator: Teflon®
Electrodes: 316 stainless steel
Standard fitting: Polypropylene
Max. pressure: 100 psi/6.9 bar
Max. temperature: 212 °F/100 °C
Optional fitting: 316 SS (1/2 in. NPT)
#3-2820.392
Max. pressure: 200 psi/13.8 bar
Max. temperature: 248 °F/120 °C
Resistivity measurements within the 10 MΩ to
18 MΩ (0.055 µS to 0.1 µS) range must be
performed in solution temperatures from
20 °C to 100 °C.
Order NPT Fitting
Number Cell Range Fitting Material
CDCE-90-10 10.0 100 - 100,000 µS 3/4 in. 316 SS
Specifications
Temperature Compensation: PT1000
Wetted materials:
O-rings: EPR
Insulator: CPVC
Electrodes: 316 stainless steel
Standard fitting: 316 SS
Max. pressure: 100 psi /6.9 bar
Max. temperature: 203 °F /95 °C
Optional Submersion
Adapter Fitting: 316 SS, #3-2820.390
Plastic pipe/tank installations: When two CDCE-90-10
sensors connected to the same controller, a minimum of
10 ft/3 m is required between sensors, if placed in the
same solution.
Metal pipe/tank installations: A CDCE-90-10 will not work
with a CDCE-90-20 sensor in the same system. Use two
CDCE-90-20 sensors in these applications.
Dimensions:
CDCE-90-10 Sensor
15 ft./4.6m
cable (standard)
5.8 in./
147 mm
3.4 in./
86 mm
0.75 in.
Standard 3/4 in.
NPT/316 SS fitting
Optional 316 SS
submersion adapter
fitting - 3/4 in. NPT
threads,
#3-2820.390
19 mm
5
Dimensions
CDCE-90-20 Sensor
15 ft./4.6 m
cable (standard)
8.0 in./
203 mm
3.5 in./
89 mm
Reversible
fitting assy
for submersion
mounting
3/4 in. NPT
Order NPT Fitting
Number Cell Range Fitting Material
CDCE-90-20 20.0 200 - 400,000 µ S 3/4 in. 316 SS
Specifications
Temperature Compensation: PT1000
Wetted materials:
O-rings: EPR
Insulator: Teflon
Electrodes: 316 stainless steel
Fitting: 316 stainless steel
Max. pressure: 100 psi/6.9 bar
Max. temperature: 302 °F/150 °C
0.75 in.
19 mm
2.2 In-line Sensor Installations
OMEGA CDCE-90 series sensors are easily
mounted using standard female pipe fittings
available at local hardware stores.
For optimum system performance, several mounting
techniques must be observed. In-line applications
require special considerations unlike most
submersible types. Factors such as air bubbles,
"dead zones", excessive flow rates, and sediment
buildup are problems associated with pipeline
installations.
Air bubbles around the sensor electrodes can
cause the sensor to read lower conductivity values
than actual. Pockets or "dead zones" may
produce inaccurate reading since they isolate the
sensor from the main process stream.
6
Oils or sediments in the system can coat or clog
the sensor electrodes, causing poor response or no
response at all.
Mount the sensor in a location where the flow rate
is moderate. Ideally, the sensor should be
mounted where flow is directed into the sensor
cavity (e.g. elbow, tee).
Refer to the following illustration for recommended
mounting techniques.
CDCE-90-001
CDCE-90-01
CDCE-90-1
CDCE-90-10
CDCE-90-20
In-line
tee fitting
CDCE-90-001
CDCE-90-01
CDCE-90-1
CDCE-90-10
CDCE-90-20
A
CDCE-90-1
A
OR
B
B
Use caution to avoid air bubble or
sediment trapping inside the electrode
cavity.
• Refer to your sensor instruction manual for
specific sensor assembly and mounting instructions.
• For other installations, contact your local
Omega Engineering distributor for additional
information.
Submersible
Air
bubbles
Air
bubbles
• After the sensor is first installed and the pipe is
filled with fluid, gently tap the sensor fitting several
times to release any air bubbles trapped within the
sensor cavity.
7
2.3 Submersible Sensor Installations
1
2
6
customer
supplied
pipe
customer
supplied
female
pipe
union
15 ft/4.6 m
cable std.
100 ft/30 m
max.
5
3
4
Sealant
Sealant
OMEGA CDCE-90-001, CDCE-90-01, and CDCE-90-1
sensors are easily modified for submersible installation. An
extension pipe and female pipe union are required (customer
supplied).
• CDCE-90-10 sensor: this sensor can be submersed via the
optional submersion adapter fitting #3-2820.390.
• CDCE-90-20 sensor: conversion for submersion mounting
is similar to the illustration above. Simply reverse the
sensor's metal swedgelock fitting assembly and refer to
step #6 above.
• Shake the sensor/pipe assembly after submersion to
remove any trapped air bubbles inside the electrode
cavity. Aerated tanks may require baffles to separate the
sensor from bubble streams. Avoid mounting locations
where bubbles are present.
8
3.1 Mounting Instructions
The controller's 1/4 DIN enclosure is specifically
designed for panel mounting. Adjustable mounting brackets allow mounting in panels up to 1 in./
25 mm thick. An adhesive template and instructions are included to insure proper installation.
For outdoor and/or stand alone installations the
splash-proof NEMA 4X/IP65 rear cover kit is
recommended (ordered separately,
PHOR-9RC).
Chapter 3
Installation
and Wiring
Panel
Gasket
3.8 in. sq.
96 mm
Mounting Panel
Max. panel thickness = 1 in./25 mm
Mounting Clamp (included, 2 ea.)
SIDE VIEW
5.7 in./145 mm
6 in./152 mm
*Optional NEMA 4X/IP65 Rear Cover
6.5 in./165 mm
Panel Cutout Instructions
Recommended panel cutout 3.54 in./90 mm
square. Maximum panel cutout 3.62 in./92 mm
square, DO NOT exceed. Use adhesive backed
template (included).
7.2 in./183 mm
90 mm X
90 mm
3.5 in.
88 mm
Panel cutout
9
Caution: Never connect live
L
1
N
AC IN
+ GND
NO C NC
RLY1DC IN
NO C NC
RLY2
R+ R-
ANL1
17 to 30 VDC @ 0.5 A
GND
15 16 17 18 19 20 21 22 23 24 25 26 27 28
*
15 16 17 18 19 20 21 22 23 24 25 26 27 28
L1
N
AC IN
+ GND
NO C NC
RLY1DC IN
NO C NC
RLY2
R+ R-
ANL1
90 to 132 VAC
OR
180 to 264 VAC
AC Hot
AC Ground*
AC Neutral
AC lines to the instrument.
Electrical shock hazard exists
3.2 Power Connections
AC Power Connections
DC power is recommended
when ground fault interrupt
devices (GFI's) are used.
Instructions
1. Jumper selectable for 90 to 132 OR 180 to 264 VAC
operation. Confirm AC power configuration before
applying power (sec. 5.2).
2. DC power can be connected simultaneously as a
backup power source, see section below.
3. *A direct or low impedance AC ground (earth ground)
MUST be used for proper operation.
4. To reduce the possibility of noise interference, AC
power lines must be isolated from signal lines.
DC Power Connections
Caution: Never connect live
DC lines to the instrument.
Electrical shock hazard exists
Note: AC/DC power can be connected simultaneously,
using DC power as an backup power source.
*A direct or low impedance earth ground must be used for
optimum performance
10
3.3 Input Connections
The CDCN-90A is compatible with
CDCE-90 series sensors. Wiring connections are
identical for ALL sensor versions.
Extended Cable Runs: Each sensor includes
15 ft/4.6 m of cable. Cable runs can extend up
to 100 ft/30 m using three conductor shielded
cable.
• Shielding must be exactly as shown below
• Shielding must be maintained through cable
splice with cable extensions.
OMEGA
Caution: Remove instrument
power prior to making any
input/output connection.
Failure to do so may result in
personal injury or damage to
the instrument.
Sensors:
CDCE-90-001
CDCE-90-01
CDCE-90-1
CDCE-90-10
CDCE-90-20
RLY3
C NO Tx GND Rx
1 2 3 4 5 6 7 8 9 10 11 12 13 14
RLY4
R+ R-
CH 2
CH 1
SERIALANL2
RED
WHITE
BLACK
CLEAR (SHLD)
RED
WHITE
BLACK
CLEAR (SHLD)
Special Considerations:
To reduce the possibility of noise interference, separate sensor
input lines from AC power lines.
CH2
S2 T2
CH1
S1 T1 SG CNO
11
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