Omega Products CDTX-90 Installation Manual

Conductivity/Resistivity

ISO 9002

CERTIFIED

CORPORATE QUALITY

MANCHESTER, UK

User’s Guide

62.50 uS/cm

25.0° C

ENTER

Shop online at

www.omega.com

e-mail: [e-mail]

ISO 9001

CERTIFIED

CORPORATE QUALITY

STAMFORD, CT

CDTX-90 Series

Conductivity/Resistivity Transmitters

omega.com

omega.com

TM

®

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WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

Omega CDTX-90 Series Conductivity/Resistivity Transmitter

Conductivity/Resistivity

62.50 uS/cm

25.0° C

ENTER

CAUTION!

• Remove power to unit before wiring
input and output connections.

• Follow instructions carefully to avoid
personal injury.

Contents

1. Installation

2. Specifi cations

3. Electrical Connections

4. Menu Functions

1. Installation

CDTX-90 Series transmitters are available in two styles: panel mount and fi eld mount. The panel mount is supplied with the
necessary hardware to install the transmitter. This manual includes complete panel mounting instructions.
Field mounting requires a separate mounting kit. The FP90UM Universal kit enables the transmitter to be installed virtually
anywhere. Detailed instructions for fi eld installation options are included with the FP90UM Universal kit.

1.1 Panel Installation

1. The panel mount transmitter is designed for installation using a 1/4 DIN Punch. For manual panel cutout, an adhesive
template is provided as an installation guide. Recommended clearance on all sides between instruments is 1 inch.

2. Place gasket on instrument, and install in panel.

3. Slide mounting bracket over back of instrument until quick-clips snap into latches on side of instrument.

4. To remove, secure instrument temporarily with tape from front or grip from rear of instrument. DO NOT RELEASE.

Press quick-clips outward and remove.

Optional
Rear
Cover

56 mm

41 mm

(2.2 in.)

(1.6 in.

)

97 mm
(3.8 in.)

Panel Mount with

NEMA 4X rear cover

92 mm
(3.6 in.)

96 mm

(3.8 in.)

FRONT VIEW

Field &

Panel Mount

96 mm
(3.8 in.)

106 mm
(4.18 in.)

SIDE VIEW

Field Mount with

Universal kit

82 mm
(3.23 in.)

42 mm
(1.7 in.)

107 mm (4.2 in.)

SIDE VIEW

Field Mount with

Integral kit

65 mm
(2.5 in.)

96 mm

(3.8 in.)

2. Specifi cations

General

Compatible electrodes: Omega CDCE-90 Series Standard and

Accuracy: ±2% of reading
Enclosure:

• Rating: NEMA 4X/IP65 front

• Case: PBT

• Panel case gasket: Neoprene

• Window: Polyurethane coated polycarbonate

• Keypad: Sealed 4-key silicone rubber

• Weight: Approx. 325g (12 oz.)
Display:

• Alphanumeric 2 x 16 LCD

• Contrast: User selected, 5 levels

• Update rate: 1.8 seconds

Electrical

• Power: 12 to 24 VDC ±10%, regulated, 80 mA max.

Sensor input range:

• Conductivity: 0.055 to 400,000 μS

• Resistivity: 10 KΩ to 18.2 MΩ
( Measurements from 10 MΩ to 18 MΩ (0.055 μS to 0.1 μS) must
be performed in solution temperatures from 20 °C to 100 °C. )

• TDS: 0.023 to 200,000 ppm

• Temperature: PT 1000, -25 to 120°C (-13 to 248°F)
Current output:

• 4 to 20 mA, isolated, fully adjustable and reversible

• Max loop impedance: 50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V

Certifi ed Series Conductivity/Resistivity Electrodes

• Update rate: 200 mS

• Accuracy: ±0.03 mA @ 25°C, 24 V
Relay outputs
(CDTX-90-2 includes 2 mechanical SPDT contacts):

• Maximum voltage rating:
5 A @ 30 VDC, or 5 A @ 250 VAC, resistive load

• Programmable for:

• High or Low setpoint with adjustable hysteresis

• Pulse operation (max. rate 400 pulses/min)

Open-collector output, optically isolated:

• 50 mA max. sink, 30 VDC maximum pull-up voltage.

• Programmable for:

• High or Low setpoint with adjustable hysteresis

• Pulse operation (max. rate 400 pulses/min)

Environmental

• Operating temperature: -10 to 70°C (14 to 158°F)

• Storage temperature: -15 to 80°C (5 to 176°F)

• Relative humidity: 0 to 95%, non-condensing

• Maximum altitude: 2000 m (6562 ft)

• Insulation category: II

• Pollution degree: 2

Standards and Approvals

• CE

• Immunity: EN50082-2

• Emissions: EN55011

• Safety: EN61010

• Manufactured under ISO 9001 and ISO 14001

• U.S.A. Patent # 5,708,363

page 1

(18 MΩ)

(10 kΩ)

CDCE-90-001

CDCE-90-20

Conductivity Range (µS)

CDCE-90 Series Sensor Ranges

Sensor Models

Ultra-

Pure

Rinse

Pure

CDCE-90-1

CDCE-90-10

CDCE-90-01

0.055 1 10 100 200 1,000 10,000 200,000 400,000

3. Electrical Connections

Sensor Selection

Select the sensor with a range closest to your process minimum and
maximum values.

• CDCE-90-001 (0.01 cell): 0.055 to 100 μS (10 kΩ to 18 MΩ)
Use the CDCE-90-001 for all resistivity requirements

• CDCE-90-01 (0.1 cell): 1 to 1000 μS

• CDCE-90-1 (1.0 cell): 10 to 10,000 μS

• CDCE-90-10 (10.0 cell): 100 to 200,000 μS

• CDCE-90-20 (20.0 cell): 200 to 400,000 μS

Wiring Tips:

• Do not route sensor cable in conduit containing AC power
wiring. Electrical noise may interfere with sensor signal.

• Routing sensor cable in grounded metal conduit will help
prevent electrical noise and mechanical damage.

• Seal cable entry points to prevent moisture damage.

• Only one wire should be inserted into a terminal. Splice
double wires outside the terminal.

• Sensor cable may not be extended over 100 ft.

Caution: Failure to fully open terminal jaws before removing wire may permanently damage instrument.

CDTX-90

Conductivity/Resistivity

62.50 uS/cm

25.0 °C

ENTER

≤ 100 ft. (30 m)

Wiring Procedure

1. Remove 0.5 - 0.625 in. (13-16 mm) of insulation from wire end.

2. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.

3. Insert exposed (non-insulated) wire end in terminal hole until it bottoms out.

4. Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection.

Wiring Removal Procedure

1. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.

2. When fully open, remove wire from terminal.

3.1 Sensor Connections

CDTX-90-1 Terminals

Shield (Sensor Gnd)

10

Black (Iso Gnd)

9

White (Temp In)

8

Red (Signal In)

7

CDTX-90-2 Terminals

Shield (Sensor Gnd)

14

Black (Iso Gnd)

13

White (Temp In)

12

Red (Signal In)

11

CDCE-90 Series Standard and Certified Cells

2

1

CDTX-90-3 Terminals

page 2

Shield (Sensor Gnd)

14

Black (Iso Gnd)

13

White (Temp In)

12

Red (Signal In)

11

Stand-alone application, no current loop used

Transmitter

4
3
2
1

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

Power Supply
DC 12 - 24 V

Power
Supply

Power
Supply

Connection to a PLC with built-in power supply

PLC

Power Supply
Ground

Power
Supply

Loop Input
4-20 mA

Loop Input
4-20 mA

Internal PLC
Connection

Connection to a PLC/Recorder, separate supply

PLC or Recorder

Loop Input
4-20 mA in

Loop Input
4-20 mA in

DC 12 - 24 V

Power
Supply

Power
Supply

Example: Two transmitters connected to PLC/Recorder

with separate power supply

Transmitter 2

4
3
2
1

DC 12 - 24 V

Power
Supply

Power
Supply

Transmitter 1

4
3
2
1

Transmitter

4
3
2
1

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

Transmitter

4
3
2
1

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

PLC or Recorder

Channel 1
4-20 mA in

Channel 1
4-20 mA in

Channel 2
4-20 mA in

Channel 2
4-20 mA in

Terminals

Terminals

Terminals

Terminals

-

+

-

+

-

+

-

+

-

+

-

+

-

+

AUX power required for all CDTX-90 systems.

CDTX-90-1 Terminal connections

Output -

Output +

System Pwr
Loop -

System Pwr
Loop +

4

3

2

1

6

5

Sensr Gnd
(SHIELD)

Iso. Gnd
(BLACK)

Temp. IN
(WHITE)

Signal IN
(RED)

10

9

8

7

AUX
Power -

AUX
Power +

Internal open-collector

output circuit

Output --

Output +

Isolation

15W

S

D

Terminals 3 and 4: Loop Power

12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V

Terminals 1-2: Auxiliary power

Provides DC power to measurement
circuit. Required for all CDTX-90
systems.

Terminals 7-10: Sensor input
7 is conductivity input
8 is temperature input
9 is the isolated signal ground
10 is the sensor earth ground

Terminals 5-6: Open-collector Output

• A transistor output, programmable (see CALIBRATE menu) as High or Low setpoint with
adjustable hysteresis and proportional pulse (to 400 pulses per minute maximum).

• May be disabled (Off) if not used.

CDTX-90-1 System Power/Loop Connections

page 3

Stand-alone application, no current loop used

Transmitter

Terminals

4
3
2
1

Sys. Pwr.
Loop ­Sys. Pwr.
Loop +
AUX
Power ­AUX
Power +

Power Supply
DC 12 - 24 V

Power
Supply
Power
Supply

Connection to a PLC with built-in power supply

PLC

Terminals

Power Supply
Ground
Power
Supply
Loop Input
4-20 mA
Loop Input
4-20 mA

Internal PLC
Connection

Connection to a PLC/Recorder, separate supply

PLC or Recorder

Loop Input
4-20 mA in
Loop Input
4-20 mA in

DC 12 - 24 V

Power
Supply
Power
Supply

Example: Two transmitters connected to PLC/Recorder

with separate power supply

Transmitter 2

4
3
2
1

DC 12 - 24 V

Power
Supply
Power
Supply

Transmitter 1

4
3
2
1

Transmitter

Terminals

4
3
2
1

Sys. Pwr.
Loop ­Sys. Pwr.
Loop +
AUX
Power ­AUX
Power +

Transmitter

Terminals

4
3
2
1

Sys. Pwr.
Loop ­Sys. Pwr.
Loop +
AUX
Power ­AUX
Power +

Sys. Pwr.
Loop ­Sys. Pwr.
Loop +
AUX
Power ­AUX
Power +

Sys. Pwr.
Loop ­Sys. Pwr.
Loop +
AUX
Power ­AUX
Power +

PLC or Recorder

Channel 1
4-20 mA in
Channel 1
4-20 mA in

Channel 2
4-20 mA in
Channel 2
4-20 mA in

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

AUX required for all CDTX-90 systems.

System Pwr
Loop -

System Pwr
Loop +

AUX
Power -

AUX
Power +

4
3
2
1

Sensr Gnd
(SHIELD)

Iso. Gnd
(BLACK)

Temp. IN
(WHITE)

Signal IN
(RED)

14
13
12
11

Relay 2
(NO)

Relay 2
(COM)

Relay 2
(NC)

Relay 1
(NO)

Relay 1
(COM)

Relay 1
(NC)

10

9
8
7
6
5

CDTX-90-2 Terminal Connections

Terminals 3 and 4: Loop Power

12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V

Terminals 11-14: Sensor input
11 is conductivity input
12 is temperature input
13 is the isolated signal ground
14 is the sensor earth ground

Terminals 1-2: Auxiliary power

Provides DC power to sensor.
Required for all CDTX-90 systems.

CDTX-90-2 System Power/Loop Connections

Terminals 5-10: Relay Outputs

• Two SPDT mechanical relays, programmable as:

• High or Low setpoint with adjustable hysteresis.

• proportional Pulse (400 pulses per minute maximum).

• May be disabled (Off) if not used.

page 4