Omega CDTX-90 User Manual

Conductivity/Resistivity

62.50 uS/cm

25.0°C

User’s Guide

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CDTX-90 Series

Conductivity/Resistivity Transmitters

OMEGAnet

®

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www.omega.com [e-mail]

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page 2

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
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

CAUTION!

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

• Follow instructions carefully to avoid
personal injury.

1. Installation

CDTX-90 Series transmitters are available in two styles: panel mount and field 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 field 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.

82 mm
(3.23 in.)

96 mm

(3.8 in.)

FRONT VIEW

Field Mount &

Panel Mount

96 mm
(3.8 in.)

106 mm
(4.18 in.)

SIDE VIEW

Field Mount

Contents

1. Installation

2. Specifications

3. Electrical Connections

4. Menu Functions

41 mm

)

(1.6 in.

SIDE VIEW

Panel Mount

Optional
Rear
Cover

56 mm
(2.2 in.)

97 mm

(3.8 in.)

92 mm
(3.6 in.)

gasket

latch

Panel Mount
Installation Detail

panel

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3

terminals

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5

+

t
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quick-clips

Conductivity/Resistivity

62.50 uS/cm

25.0°C

mounting

bracket

ENTER

2. Specifications

General

Compatible electrodes: Omega CDCE-90 Series Standard and

Certified Series Conductivity/Resistivity Electrodes
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

• 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

• CSA, CE, UL listed

• Immunity: EN50082-2

• Emissions: EN55011

• Safety: EN61010

• Manufactured under ISO 9001 and ISO 14001

• U.S.A. Patent # 5,708,363

page 3

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

Ultra-

Pure

CDCE-90-001

Sensor Models

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

(18 MΩ)

Rinse

Pure

CDCE-90-01

CDCE-90-10

CDCE-90-1

(10 kΩ)

CDCE-90 Series Sensor Ranges

CDCE-90-20

Conductivity Range (µS)

Wiring Tips:

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

CDTX-90

Conductivity/Resistivity

62.50 uS/cm

25.0°C

≤ 100 ft. (30 m)

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

ENTER

• 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.

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

2
1

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

CDTX-90-3 Terminals

Shield (Sensor Gnd)

14

Black (Iso Gnd)

13

White (Temp In)

12

Red (Signal In)

11

CDCE-90 Series Standard and Certified Cells

page 4

CDTX-90-1 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 7-10: Sensor input
7 is conductivity input
8 is temperature input
9 is the isolated signal ground
10 is the sensor earth ground

System Pwr

4

Loop -

System Pwr

3

Loop +

AUX

2

Power -

AUX
Power +

1

Internal open-collector

Terminals 1-2: Auxiliary power

output circuit

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

Isolation

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

6

5

Output -

Output +

S

D

15Ω

10

9

8

7

Output --

Output +

Sensr Gnd
(SHIELD)

Iso. Gnd
(BLACK)

Temp. IN
(WHITE)

Signal IN
(RED)

Stand-alone application, no current loop used

Transmitter

Ter minals

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

4
3
2
1

Power Supply
DC 12 - 24 V

Power

-

Supply
Power

Supply

+

Connection to a PLC/Recorder, separate supply

Transmitter

Ter minals

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

4
3
2
1

DC 12 - 24 V

Power

-

Supply
Power

Supply

+

PLC or Recorder

Loop Input

-

4-20 mA in
Loop Input

+

4-20 mA in

AUX power required for all CDTX-90 systems.

Connection to a PLC with built-in power supply

Transmitter

Ter minals

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

4
3
2
1

Internal PLC
Connection

PLC

-

+

-

+

Ter minals

Power Supply
Ground

Power
Supply

Loop Input
4-20 mA

Loop Input
4-20 mA

Example: Two transmitters connected to PLC/Recorder

Transmitter 1

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

Transmitter 2

Sys. Pwr.
Loop -

Sys. Pwr.
Loop +

AUX
Power -

AUX
Power +

4
3
2
1

4
3
2
1

with separate power supply

DC 12 - 24 V

Power
Supply

Power
Supply

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

page 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

System Pwr

4

Loop ­System Pwr

3

Loop +
AUX

2

Power ­AUX

Power +

1

10

9
8
7
6
5

Relay 2
(NO)

Relay 2
(COM)

Relay 2
(NC)

Relay 1
(NO)

Relay 1
(COM)

Relay 1
(NC)

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

Sensr Gnd

14

(SHIELD)
Iso. Gnd

13

(BLACK)
Temp. IN

12

(WHITE)
Signal IN

(RED)

11

Terminals 1-2: Auxiliary power

Provides DC power to sensor.

Terminals 5-10: Relay Outputs

• Two SPDT mechanical relays, programmable as:

Required for all CDTX-90 systems.

CDTX-90-2 System Power/Loop Connections

Stand-alone application, no current loop used

Transmitter

Power Supply

Terminals

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

4
3
2
1

DC 12 - 24 V

Power

-

Supply
Power

+

Supply

Connection to a PLC/Recorder, separate supply

Transmitter

Terminals

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

4
3
2
1

DC 12 - 24 V

Power

-

Supply
Power

+

Supply

PLC or Recorder

Loop Input

-

4-20 mA in
Loop Input

+

4-20 mA in

AUX required for all CDTX-90 systems.

• High or Low setpoint with adjustable hysteresis.

• proportional Pulse (400 pulses per minute maximum).

• May be disabled (Off) if not used.

Connection to a PLC with built-in power supply

Transmitter

-

Terminals

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

4
3
2
1

Internal PLC
Connection

Example: Two transmitters connected to PLC/Recorder

Transmitter 1

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

4
3
2
1

with separate power supply

Transmitter 2

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

4
3
2
1

+

-

+

DC 12 - 24 V

-

+

PLC or Recorder

-

+

-

+

PLC

Te rm inals

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

Power
Supply
Power
Supply

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

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

page 6