PH-TRA-600

PH-TRA-600 online PH transmitter is an accurate instrument used for industrial on-line PH measurement and PH controlling. The instrument is easy to install and use, operates safely, has a strong adaptability to the environment, and requires little maintenance. It widely used for the water treatment environmental protection, industrial waste water, chemical industry etc. The instrument has the following main characteristics: 1) Switch display PH and Temp. value. 2) Three-point calibration, automatic identification of solutions. 3) High and Low limit relay control output, 4) Isolated 4-20mA current signal output or RS485 output.

Product Details

Product Details

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Product Details

Major Technical Specifications

Measurement range 0.000~14.00pH
Resolution ratio 0.02PH
Accuracy ±0.1pH
Displaying mode 3½ LCD
Calibrating mode Three-point calibration (automatic identification of solutions)   
Manual temperature compensation 0~120℃
Compression resistance of electrodes 0~0.5MPa
Measurement distance standard configuration 5m(≤40m)
Flow Velocity ≤3m/s,
Pressure ≤0.4Mpa
Output 4-20mA current or Modbus RS485 (optional)
Control output Maxi. and Mini. (constantly open) contact point
Capacity of contact points 3A/AC250V (with resistant loads)
Power supply DC-24V,0.5A □; (Standard) DC-12V,0.5A □; (Optional)
Environmental conditions Humidity: ≤85%/RH; Temp.: 0~50℃;
External dimensions 92*76*59mm (H x W x D)
Installation mode DIN Installation

Wire Connection Details

PH-TRA-600

Note: The standard version is a two-wire manual temp. compensation electrode

A Terminals:

No.

Terminal

Terminal Content

1

HI

Constantly open high limit relay alarm output

2

COM

Relay common terminal

3

LO

Constantly open low limit relay alarm output

4

NC

Empty

5

NC

Empty

6

INPUT

PH electrode signal input( Transparent wire)

7

REF

PH electrode signal ground wire( Black)

8

TEMP

Auto Temp. compensation measuring wire

9

TEMP

Auto Temp. compensation measuring wire

B Terminals:

No.

Terminal

Terminal Content

1

DC 24+

Power input +

2

GND

Equipment Ground wire

3

DC 24-

Power input -

4

NC

Empty

5

485G

RS 485 Signal Ground wire

6

A

RS485 Signal A

7

B

RS485 Signal B

8

MA+

4-20mA current signal output +

9

MA-

4-20mA current signal output -

Operation Of The Instrument

4.1 Soft key function

Soft key

Key function

Function description

PH-TRA-600

Menu Key

Under Measuring status, Enter or exit related parameter “setting Menu”

PH-TRA-600

Right shift key

Right Shift to select the digit of the parameter(Number flashes When selected); Up shift to browse Menu.

PH-TRA-600

Add shift key

Change the selected parameter digital value and parameter shift

PH-TRA-600

Confirm key

Confirm to select and enter into Menu and parameter save, check the temperature value.

4.2. Operation of the instrument

Under main interface,Press“ PH-TRA-600”key to Menu interface, the detailed description as follows:

No.

Menu

Menu Content

1

Un-T

Measuring Unit: pH/mV shift to display

2

T--C

Temp Compensate Interface: HT-- (Manual) 、PT--( PT1000)、  NTC-(NTC10K)

3

HC--

Relay high limit close value

4

HO--

Relay high limit open value

5

LC--

Relay low limit close value

6

LO--

Relay low limit open value

7

DE--

delay x second alarm

8

4--A

4mA corresponding PH value

9

20-A

20mA corresponding PH value

10

ADD-

RS-4854 Address, default value 002

11

BAUD

RS-4854 Baud speed, default value 9600 

12

CAL-

PH Calibration Menu (4.0/6.86/9.18)

13

FAC-

Factory setting Menu

Note: After having set an option, you must press the button to save the data.

Calibration Of Instruments

The calibration takes the form of three-point calibration. The automatic calibration protection function work in the process of calibration, illegal calibration is not executed.

Before the calibration starts, make sure that you have compounded three kinds of buffer solutions whose PH values are respectively 4.00, 6.86 and 9.18 according to relevant requirements. Before the calibration starts, the electrodes must be submerged and activated in clean water or the measured solution for 5 minutes.

The calibration methods are as follows: when it is the in the measuring state,

Press the button PH-TRA-600 until the instrument display “CAL”, and it enters the calibrating state.

Press the buttonPH-TRA-600, and the instrument will display “4.00”. Put the cleaned electrodes into the 4.00 compounded buffer solution, press the button PH-TRA-600, the controller display current buffer solution corresponding PH value, when PH value stable, and wait 3 to 5 minutes, press the button PH-TRA-600 to save.

The controller display “6.86”, after clean the PH electrodes by pure water, put the cleaned electrodes into the 6.86 compounded buffer solution, press the button PH-TRA-600, the controller display current buffer solution corresponding PH value ......, till 9.18 calibration finish and display OK .

During calibration, if the controller display “ ERR”, which indicate calibration failure, need to re-calibrate, if more times calibration failure, pls change the PH electrode, or contact with the supplier.

Installation Of Measuring Electrodes

The measuring electrodes are compound electrodes with plastic shells and 3/4"NPT threaded joints, Please install strictly according to the following diagrams:

PH-TRA-600 PH-TRA-600

3/4"NPT threaded joints.

Points for attention:

1) The electrodes shall be installed where the flow speed is steady and air bubs seldom gather or backwater which may lead to the inaccuracy.

2) The electrode shall be submerged deep into flowing water.

3)The cable collecting PH signals which is a form of weak potential signals shall be separately wired and shall not share a protective pipe with power supply wires and control wires, so as to avoid interference.

Measuring electrodes maintenance:

1) Avoid putting the electrodes in the dry air. When the electrodes are not in use, clean them with water and then put them back into the liquid- containing case with 1 mol KCL,or put the electrodes into a container with 1 mol KCL in it.

2) The electrodes shall be cleaned regularly. If the glass bulbs of the electrodes and Polytetrafluoroethylene (PTFE) are contacted and polluted, clean them with the following agents:

① use surface active agent to get rid of grease or greasy things.

② use 10% hydrochloric acid solution to get rid of calcium precipitates or metal hydroxides.

③ use 10% hydrochloric acid solution to get rid of sulphide precipitates. Use the mixture of 10% hydrochloric acid solution and pepsins to get rid of protein adhesives.

Maintenance Of Instrument

1) The measuring electrodes are accurate parts and shall not be taken out of the measuring room unless it is necessary to do so.The PH electrode sshall be cleaned Regularly.

2) Measuring cables are special cables which shall not be replaced by other types of cables. Unqualified cables may cause big errors.

3) If the measuring electrodes are damaged or losing efficacy, purchase and replace them with the same type of compound electrodes, and calibrate them {0><}0{>according to the fifth chapter of this manual.

4) The instrument is composed of accurate integrated circuits and electronic components and therefore shall be protected from humidity.

The Instrument As A Whole Set

PH transmitter 1pc
PH Sensor 1pc
Fixing clamp 1 pair
Operation manual 1 copy

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FAQS

Frequently Asked Questions (FAQ) About PH-TRA-600

What is PH-TRA-600 and what scenarios is it used in?

Down Down

It is an online pH transmitter, used to monitor pH value in industrial, environmental protection, agriculture and other scenarios.

How to install PH - TRA - 600 Online PH Transmitter?

Down Down

Select the location, soak the sensor, connect the wires and debug.

How to calibrate and maintain a PH-TRA-600 transmitter?

Down Down

Calibrate regularly with buffer, clean the sensor and check the wiring.

What are the reasons for inaccurate measurement of PH - TRA - 600?

Down Down

Sensor aging, improper calibration, environmental and wiring problems.
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