B&C Electronics PH 3630 INSTRUCTION MANUAL

CERT. N. 9115 BCEL

INSTRUCTION MANUAL

UNI EN ISO 9001:2000

PH 3630

2-WIRE pH TRANSMITTER

DIN RAIL

pH Scale: 0.00/14.00 pH

Temp. Scale: -10.0/+120.0 °C

Power Supply: 10/30 Vdc

Option

S/N

REP N°

Cod. 28001363 - Rev. B - 10/05 - Valid from S/N 39263

B&C Electronics Srl - Via per Villanova 3 - 20040 Carnate (Mi) - Italy - P.IVA 00729030965
Tel [phone] - Fax [phone] – [e-mail] - www.bc-electronics.it

B&C Electronics PH 3630

Index

1 GENERAL .........................................................................................................................................3

2 FUNCTIONAL DESCRIPTION .......................................................................................................3

3 PHYSICAL DESCRIPTION .............................................................................................................3

4 SPECIFICATIONS............................................................................................................................4

5 PHYSICAL INSTALLATION..........................................................................................................5

6 ELECTRICAL INSTALLATION .....................................................................................................6

6.1 Connecting the power...............................................................................................................6

6.2 Connecting the electrode (probe)..............................................................................................6

6.3 Connecting the temperature sensor...........................................................................................7

7 SYSTEM CHECKING ......................................................................................................................8

8 OPERATING THE SYSTEM ...........................................................................................................9

8.1 Pre-operation check ..................................................................................................................9

8.2 Electrical calibration.................................................................................................................9

8.3 Calibrating the pH transmitter ................................................................................................10

9 NORMAL OPERATION.................................................................................................................11

9.1 Manual temperature compensation......................................................................................... 11

10 PREVENTIVE MAINTENANCE...................................................................................................12

10.1 Transmitter..............................................................................................................................12

10.2 Sensor .....................................................................................................................................12

11 TROUBLESHOOTING GUIDE .....................................................................................................13

Instruction Manual - Rev. B - 10/05

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B&C Electronics PH 3630

1 GENERAL

This manual applies to the PH 3630 digital 2-wire transmitter DIN RAIL housing.

It explains the purpose of the equipment, describes the components of the system and the procedures
for installing, operating and calibrating the equipment.

Some maintenance suggestions are also provided.

2 FUNCTIONAL DESCRIPTION

This transmitter, when connected to the pH electrode, provides a digital readout of the pH of aqueous
solutions.

The transmitter will perform manual or automatic Temperature compensation to correct pH readings
for Temperature related variations. Temperature information is displayed by pushing button "2"
marked "Temp".

The transmitter provides an isolated 4/20 mA output, proportional to the pH value which is suitable for
Data Acquisition Systems, Recorders, Controllers or other input Devices that require a 4-20 mA input.

The front panel contains trimmer pots for Zero and Slope adjustments. "Zero" is adjusted with trimmer
"3" and "Slope" is adjusted with trimmer "4".

The unit is protected against power supply inversion.

3 PHYSICAL DESCRIPTION

The transmitter enclosure is designed for DIN Rail mounting.

It consists of a plastic case with front panel which is coated by a polycarbonate membrane , to ensure
maximum anticorrosion characteristics.

For field applications mounting in a splash proof or weather resistant box is suggested.

Connections to power supply, loads, recorder, RTD, electrodes and probe are installed onto the
terminal block connector.

Instruction Manual - Rev. B - 10/05

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B&C Electronics PH 3630

4 SPECIFICATIONS

Display: LCD

Inputs: pH electrode
RTD Pt100 3 wires

Output: 4/20 mA dc isolated

Scales: 0.00/14.00 pH

-10.0/120.0 °C

Temp. Compensation: manual or automatic

Zero: adjustable +/- 15%

Sensitivity (Span): adjustable from 86 % to 112 %

Input Current: < 2 pA

Input Resistance: > 1012 Ω

Operating Temperature: 0/50 °C

Operating Humidity: 95 % without condensation

Power supply: 10/30 Vdc

Isolation: 500 V Input to Output

Terminal block: detachable

Net Weight: 200 g

Dimensions: 105 x 95 x 58 mm (6 modules)

Mounting: DIN Rail

Instruction Manual - Rev. B - 10/05

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B&C Electronics PH 3630

5 PHYSICAL INSTALLATION

The transmitter must be installed into an enclosure for outdoor or indoor use and may be located close
to the measuring point or some distance away in a control area.

To ensure best operational performance, it is suggested that the transmitter be located within 30 feet of
the electrode, and long cable runs be made with conventional coaxial electrode cable.

The transmitter's housing is designed for DIN Rail mounting.

The electrode's coax cable must be protected by a sheath and not installed near power cables.

Extension cables should be avoided. When necessary, always use only high insulation terminals.

When installing "in line" electrodes it is suggested to follow the specific instructions given by the
sensor's manufacturer.

Instruction Manual - Rev. B - 10/05

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B&C Electronics PH 3630

6 ELECTRICAL INSTALLATION

The electrical installation consists of:

- connecting the power supply to the transmitter;

- connecting the electrode or the probe to the transmitter;

- connecting the Temperature sensor.

(See Fig. 3)

All connections within the transmitter are made on the terminal block.

6.1 CONNECTING THE POWER

- Connect dc power "+" to terminal "1" marked "+".

- Connect the terminal marked "-" to terminal "+" of the load.

- Connect dc power "-" to terminal "-" of the load.

The unit is protected against eventual inverted connections

WARNING:

Verify the supply voltage prior to connection to the transmitter

6.2 CONNECTING THE ELECTRODE (PROBE)

Electrode cabling is a critical component for trouble free system operation.

- Use a low noise coax cable on overall length between sensor and input terminals of the
Transmitter;

- low noise cable has, in general, a black conductive layer between the central conductor and the
shield. Be sure this layer is removed;

- extension cables should be avoided. When necessary, always use only high insulation terminals;

- avoid installing cable near any power cables;

- connect the shield of the coax cable (Reference electrode) to the terminal "11" marked "R";

- connect the central conductor (Glass electrode) to the terminal "10" marked "V".

Instruction Manual - Rev. B - 10/05

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