NIEUWKOOP EC3000 Manuale utente

USER MANUAL

EC3000

EC-TRANSMITTER

Isolated output 4-20mA

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

Conductivity Scale : 0/199.9 µS –0/1999 µS

0/19.99 mS

Temperature Scale : -10.0/+120.0 ˚C

Power Supply : 10/30 Vdc

Cod. 28003364

Rev. C –01/19

Valid from S/N 39252

INDEX

1GENERAL WARNINGS AND INFORMATION FOR ALL USERS.........................................................................................................................3

1.1 WARRANTY.........................................................................................................................................................................................................................................3

1.2 AFTER SALES SERVICE ............................................................................................................................................................................................................3

1.3 CE MARKING....................................................................................................................................................................................................................................3

1.4 SAFETY WARNINGS..................................................................................................................................................................................................................3

2GENERAL........................................................................................................................................................................................................................................................ 4

3FUNCTIONAL DESCRIPTION.......................................................................................................................................................................................................4

4PHYSICAL DESCRIPTION................................................................................................................................................................................................................ 4

5SPECIFICATIONS................................................................................................................................................................................................................................... 5

6 PHYSICAL INSTALLATION..............................................................................................................................................................................................................6

7 ELECTRICAL INSTALLATION..........................................................................................................................................................................................................7

7.1 CONNECTING THE POWER................................................................................................................................................................................................7

7.2 CONNECTING THE 2-ELECTRODES CELL...........................................................................................................................................................7

7.3 CONNECTING THE 4-ELECTRODES CELL..........................................................................................................................................................7

7.4 CONNECTING THE TEMPERATURE SENSOR...................................................................................................................................................8

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

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

9.1 PRE-OPERATION CHECK....................................................................................................................................................................................................9

9.2 ELECTRICAL CALIBRATION.............................................................................................................................................................................................10

10 NORMAL OPERATION.........................................................................................................................................................................................................................11

10.1 MANUAL TEMPERATURE COMPENSATION ........................................................................................................................................................11

10.2 CELL CONSTANT ADAPTATION...................................................................................................................................................................................11

10.3 CHEMICAL CALIBRATION OF THE CONDUCTIVITY .................................................................................................................................11

11 PREVENTIVE MAINTENANCE......................................................................................................................................................................................................13

11.1 TRANSMITTER..................................................................................................................................................................................................................................13

11.2 SENSOR...............................................................................................................................................................................................................................................13

12 TROUBLESHOOTING GUIDE.......................................................................................................................................................................................................14

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

1 GENERAL WARNINGS AND INFORMATION FOR ALL USERS

1.1 WARRANTY

This product is guaranteed for all manufacturing defects.

Please take a look at the terms and conditions described on the Warranty certificate at the end of the

manual.

1.2 AFTER SALES SERVICE

Nieuwkoop B.V./B&C offers to all of its Customers the following services:

- a free of charge technical assistance over the phone for problems regarding installation,

calibration and regular maintenance;

- a repairing service in our Aalsmeer (Netherlands) headquarter for all types of damages,

calibration or for a scheduled maintenance.

Please take a look at the technical support data sheet at the end of the manual for more details.

1.3 CE MARKING

This instrument is manufactured according to the following European Community directives:

• 2011/65/EU "Restriction of the use of certain hazardous substances in electrical and electronic

equipment"

• 2014/30/EU "Electromagnetic compatibility" EMC

• EN 61326-2-3/2013 "Electromagnetic compatibility" EMC

–Controlled electromagnetic environment

• EN 55011/2009 "Radio-frequency disturbance characteristics"

–Class A (devices for usage in all establishment other than domestic)

–Group 1 (Industrial equipment that do not exceed 9kHz)

The marking is placed on the packaging and on the S/N label of the instrument.

1.4 SAFETY WARNINGS

It is important to underline the fact that electronic instruments are subject to accidents. For this, it is

important to take all necessary precautions to avoid damages caused by malfunctions.

All types of operations must be performed by authorized and trained staff.

The use of this controller must respect the parameters described in chapter “Technical specification”, so

to avoid potential damages and a reduction of its operating life.

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

2 GENERAL

This manual applies to the C 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.

3 FUNCTIONAL DESCRIPTION

This transmitter, when connected to the E.C. cell provides a digital readout of the conductivity of aqueous

solutions.

The transmitter will perform manual or automatic temperature compensation to correct conductivity

readings for temperature related variations.

Temperature information is displayed by pushing button "2" marked "TEMP". Measuring scales, operating

frequency and decimal point are selectable.

The transmitter provides an isolated 4/20 mA output, proportional to the conductivity 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 Cell constant adjustment. Zero is adjusted by

trimmer "3" marked "ZERO" and Cell constant is adjusted by trimmer "4" marked "SENS".

4 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 (Fig. 1), to

ensure maximum anticorrosion characteristics.

For field applications mounting in a splash proof or weather resistant box is suggested. Figure 3

describes the physical details and dimensional characteristics.

Connections to power supply, loads, recorder, RTD, electrodes and probe are installed on to the terminal

block connector.

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

5 SPECIFICATIONS

Display

LCD

Input

2-electrodes E.C. cell

4-electrodes E.C. cell

RTD Pt100 2 or 3 wire

Output

4/20 mA isolated

Scales

0/199.9 µS –0/1999 µS –0/19.99 mS

-10.0/120.0 ˚C

Temp. compensation

manual or automatic

Temp. comp. coefficient

0/4.0 %/°C adjustable

Temp. comp. reference

20 °C

Zero

adjustment ± 15%

Slope

adjustable 86/112 % narrow range

adjustable 0/160 % wide range

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 mountable

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

6 PHYSICAL INSTALLATION

The transmitter must be installed into an enclosure for outdoor or indoor use and may be located

to the measuring point or some distance away in a control area.

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

The conductivity cell must be mounted properly if the system is to operate accurately and efficiently.

It must meet the following requirements:

-the sample in the cell must be representative of the whole solution

-the solution must circulate continuously through the cell

-the flow velocity in the cell must not be so high as to cause cavitations

-the position and orientation of the cell must not trap air-bubbles near the electrode area

-sediments must not accumulate within the electrode area

-in all dip cell installations the water must be continuously stirred.

Keep the

cable away from power wires on the overall length.

This cable too must not be interrupted on overall length. If interruption is necessary, the extension

cable must be fastened to the high insulation terminal strip.

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

Interrupting

cables must be avoided or carried out using high insulation terminals.

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

7 ELECTRICAL INSTALLATION

The electrical installation consists of:

-connecting the power supply to the transmitter

-connecting the cell or the probe to the transmitter

-connecting the temperature sensor

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

7.1 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.

7.2 CONNECTING THE 2-ELECTRODES CELL

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

-use the original cable on overall length between sensor and input terminals of the transmitter.

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

-avoid installing cable near any power cables.

-connect the cell cable to the terminals "10-13" marked "CO - CI"

7.3 CONNECTING THE 4-ELECTRODES CELL

This special cell must be connected to terminals " 10-11-12-13 ". See the

specific instruction manual for this E.C. sensor.

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

7.4 CONNECTING THE TEMPERATURE SENSOR

The model C 3630 features Automatic Temperature Compensation carried out by means of a RTD

Pt100.

The temperature sensor has to be installed in the same solution being measured, close to the E.C. cell

in-line or in the tank.

ATTENTION

In order to activate the ATC function, prior to connecting the RTD between terminal "4-5-6" marked

"T1-T2-T3", it is necessary to remove the jumpers from terminals "3-4" and "5-6".

These jumpers must be reinstalled when operating the transmitter in manual temperature mode.

The RTD connection as above described will also provide a digital display of temperature values.

The sample temperature value is displayed by pushing the key pad "2" marked "TEMP" on the front

panel.

The temperature readout will not disrupt the measuring functions of the transmitter.

8 SYSTEM CHECKING

Before connecting the system to the power supply:

-check that all connections are installed correctly

-check that all cables are properly fastened to prevent strain on the connections

-check that all terminal-strip connections are mechanically and electrically solid.

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

9 OPERATING THE SYSTEM

9.1 PRE-OPERATIONCHECK

The system's controls and indicators are all located on the front panel.

The transmitter LCD will be displayed to indicate that the unit is on.

Push the key pad "2" to check the sample temperature (if RTD is connected), or the Manual

Temperature value (RTD not connected and jumpers installed).

Push the button "S1" and adjust the Temperature Coefficient value on the display by means of the

trimmer "R33" marked "TC". (see Fig. 2)

(Standard value is 2.0 %/°C)

Scales selection

Select the scale as per following table by the dip-switches S2 marked A and S3 marked B:

Scales

Switch S2

Switch S3

199.9 µS

OFF

1999 µS

OFF

19.99 mS

OFF

Frequencyselection

Select the frequency as per following table by the dip-switches S4 marked M and S5 marked H:

Frequency

Switch S4

Switch S5

Low

OFF

Medium

OFF

High

OFF

Select low frequency for 199.9 µS scale

Select medium frequency for 1999 µS scale

Select high frequency for 19.99 mS scale

EC3000

EC-TRANSMITTER

_____________________________________________________________________________________________

Decimal point selection

Select the decimal point as per following table by the dip-switch S6 marked 1, S7 marked 2 and S8

marked 3:

Decimal Point

Switch S6

Switch S7

Switch S8

XXXX

OFF

X.XXX

OFF

XX.XX

OFF

XXX.X

OFF

The circuit boards of the unit are pre-adjusted at the factory.

If sensors and probes have been installed correctly as previously described, the system should operate

correctly requiring only the K cell calibration.

WARNING:

Improper wiring connections which result in damage to the transmitter are not covered under warranty.

9.2 ELECTRICALCALIBRATION

The following procedures can be used to verify that the system is operating satisfactorily, and it can be

repeated periodically to check that the transmitter is maintaining electrical calibration:

-connect a conductivity simulator to terminals "10 - 13"

-simulate conductivity values over the entire scale

-adjust "zero" and "slope" with trimmers located on the front panel

For the customer's convenience it follows the equivalence table between the Electric Resistance (Ω)

and the Electric Conductivity (Siemens) according to the relation:

1 Siemens =

1 Ω

R Ω

1 MΩ

100 kΩ

10 kΩ

1 kΩ

100 Ω

10 Ω

C siemens

1 µS

10 µS

100 µS

1000 µS

10 mS

100 mS

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