Sensorex TX105 Manuel utilisateur

TX105 PH/ORP Transmitter

User Manual

REV B.15T

Sensorex Corporation

11751 Markon Drive

Garden Grove, CA. 92481

www.sensorex.com

IMPORTANT SAFETY INFORMATION

Please read and observe the following:

Remove line power before wiring transmitter connections.

Wiring or repairs should only be performed by qualified personnel and only to an

unpowered transmitter.

Whenever it appears that Transmitter safety is questionable, disable the transmitter to

ensure against any unintended operation. For example, an unsafe condition is likely

when:

1）The transmitter appears visibly damaged.

2）The transmitter fails to operate properly or provide the intended measurements.

3）The transmitter has been stored for long periods at temperatures above 176F (80C).

The transmitter must be installed by specially trained personnel in accordance with

relevant local codes and instructions contained in this user manual. Observe the

transmitter’s specifications and relative parameter’s ratings.

Table of Contents

1 Introduction ..............................................................................................................................4

2 Dimension Drawings .................................................................................................................4

2.1 Front and Side View ......................................................................................................4

2.2 Installation.....................................................................................................................4

2.2.1 Panel Installation Instructions...........................................................................4

2.2.2 Field Mount Installation ....................................................................................6

3 Specifications ............................................................................................................................7

4 Electrical Connections...............................................................................................................8

4.1 System Power & Loop Connections ..............................................................................8

4.2 Sensor Input Connections .............................................................................................9

4.3 OC Output .....................................................................................................................9

4.3.1 Open Collector Output Connections .................................................................9

4.3.2 Open Collector Output Operation...................................................................10

5 Menu.......................................................................................................................................11

5.1 View Menu for pH .......................................................................................................11

5.1.1 EasyCal Details.................................................................................................11

5.2 View Menu for ORP.....................................................................................................13

5.3 Editable Menu .............................................................................................................13

5.3.1 Editing Procedure............................................................................................13

5.3.2 Main Menu......................................................................................................14

5.3.3 Calibration Menu for pH..................................................................................14

5.3.4 Output Menu for pH........................................................................................15

5.3.5 Calibration Menu for ORP ...............................................................................17

5.3.6 Output Menu for ORP .....................................................................................17

5.3.7 Options Menu .................................................................................................17

6 Troubleshooting ......................................................................................................................19

7 Ordering information ..............................................................................................................20

1Introduction

The TX105 pH/ORP transmitter is a 2-wire

transmitter designed for industrial process monitoring,

measurement, and control applications. This user’s

manual contains the information needed to install, set up,

operate, and maintain the transmitter.

2Dimension Drawings

2.1 Front and Side View

Front view Side view

Panel Mount& Field Mount

2.2 Installation

TX105 pH/ORP transmitters are available in two installation styles: panel mount and field

mount.

2.2.1 Panel Installation Instructions

1) The panel mount version is designed for installation using a 1/4 DIN Punch.

2) Recommended clearance on all sides between instruments is 1 inch.

3) Slide the gasket over the back of the instrument.

4) Place the instrument into the panel cut-out.

5) Attach the mounting bracket to the back of the instrument by pulling apart the quick clips

and sliding it over the back of the instrument. Make sure that the quick clips are securely

attached to the latches.

6) Inspect the instrument to make sure that the instrument and the gasket are secured to the

panel appropriately.

7) To disassemble, press the clips of the mounting bracket against the panel and pull the

instrument away from the front.

Diagrammatic sketch：

Panel mount installation detail schematic

2.2.1.1 Panel Cut-Out

2.2.2 Field Mount Installation

The field mount version requires a wall mounting kit, which includes a plastic wall mounting rear

cover with gasket as well as fixing screws. This makes it possible to install the transmitter on a

variety of surfaces.

1) Place the gasket on the instrument.

2) Thread electrical cables through the connectors on the wall mounting rear cover.

3) Connect the power, sensor and OC output wires.

4) Secure the wall mounting rear cover to the front enclosure with screws.

5) Fix the wall mounting rear cover to the surface by using screws or cables.

Diagrammatic sketch：

Field mount installation detail schematic

3Specifications

Display:

LCD: 128*65 dot matrix, figure or alphabet: 12x8, 28x15, 32x18, etc.

Update rate: 1 second

Contrast: User selected, 5 levels

Measurement:

pH: 0.00 to 14.00 pH

ORP: -2000mv~+2000mv

Temperature: PT1000: 0 ~ 60 °C (32~ 140 °F)

Accuracy: ± 0.5% of reading

Repeatability*: ± 0.05% of span

Temperature drift*: Zero and Span: ± 0.02% of span per℃

*These performance specifications are typical at 25C

Electrical:

Power: 19 -48VDC, regulated, 30mA maximum

Current Output:

Isolated 4-20 mA output with 0.004 mA (12-bit) resolution

Update rate: 1 second

Maximum loop impedance: 250Ω@24V; 600Ω@31V; 1500Ω@48V

Memory:

Non-volatile: All user settings are retained indefinitely without battery backup

Open-Collector Output:

Isolated, 50 mA sink, 40 VDC maximum pull-up voltage

The OC output can be configured to be one of three modes below:

High mode

Low mode

Proportional pulses

Ambient Conditions:

Operation: -10 °C to 70 °C (14 °F to 158 °F); 0-95% relative humidity, non-condensing

Transport/storage: 15°C to 80°C (5°F to 176°F); 0-95% relative humidity, non-condensing

Standards and Approvals

CE: Certified Compliant to European Community Standards.

4Electrical Connections

4.1 System Power & Loop Connections

Standalone application, loop current isn’t used

Power Supply

Transmitter Terminals

24VDC+

V+/Loop+

24VDC-

V-/Loop-

Connection to a PLC with built-in power supply.

PLC Terminals

Transmitter Terminals

24VDC+

V+/Loop+

24VDC-

4-20mA Loop Input

V-/Loop-

4-20mA Loop Input

Connection to a PLC with separate power supply

Option A

Power Supply

Transmitter Terminals

24VDC+

V+/Loop+

24VDC-

V-/Loop-

PLC

4-20mA Loop Input

Option B

PLC

Transmitter Terminals

4-20mA Loop Input

V+/Loop+

4-20mA Loop Input

V-/Loop-

Power Supply

24VDC+

24VDC-

4.2 Sensor Input Connections

CAUTION:

• As electrical noise may interfere with electrode signal, please do not route the electrode cable in a

conduit containing AC power wiring.

PH Sensor Input Connections：

Sensor Input

Transmitter Terminals

TC-

coax center

Temp-

TC+

Temp+

REF

PH/ORP

Input

ORP Sensor Input Connections：

Sensor Input

Transmitter Terminals

10K Ohm Resistor customer

supplied

REF

ORP

PH/ORP

Input

TX105

4.3 OC Output

4.3.1 Open Collector Output Connections

Connection to a PLC with built-in power supply

10K Ohm Resistor customer

supplied

10K Ohm Resistor

Note: If sensor does not have

ATC, short TC- to TC+

coax braid

Red

Black

coax center

coax braid

PLC

Power Supply+

Power Supply-

Transmitter Terminals

OC input+

O.C.+

OC input-

O.C.-

Connection to a PLC, separate supply

Power Supply

24VDC+

24VDC-

PLC

Transmitter Terminals

OC input+

O.C.+

OC input-

O.C.-

4.3.2 Open Collector Output Operation

The open collector output can be used as a switch or a warning that responds when the process value

moves above or below a set point, or it can be used

to generate a pulsing signal with a rate proportional

to the process value. The output can be disabled if

not used (select “OFF” in the OC OUTPUT menu).

The “parameter” mentioned below could be any of

the three: pH, ORP, or temperature.

Low Mode:

In this mode, the OC output is only active when the

parameter is less than a user set point. The output

will be inactive when the parameter is larger than

the set point plus the hysteresis value.

High Mode:

In this mode, the OC output is only active when the

parameter is larger than a user set point. The output

will be inactive when the parameter is smaller than

the set point minus the hysteresis value.

Proportional Pulsing

In this mode, the OC output will generate a pulse

sequence at the rate defined by the setting in the

OC OUTPUT menu.

In the example below, the starting point is pH=0.00,

the end point is pH=10.00 and the maximum frequency is 200 pulses/min:

• The output will be 0 pulses/min at pH values less than 0.0.

• The output will be 100 pulses/min at 5.00pH.

• The output will be 200 pulses/min at pH values above 10.00pH.

OC Low Setpoint

Hysteresis

Time

Value

N.O.

:OC Output Active

:OC Output Inactive

OC OC

High Setpoint

Hysteresis

Time

Value

N.O.

:OC Output Active

:OC Output Inactive

100K

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