YOKOGAWA SC202S User Manual

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User’s Manual

Model SC202G(S) Conductivity and Resistivity Transmitter

IM 12D7B3-E-H

6th Edition

YOKOGAWA

IM 12D7B3-E-H

TABLE OF CONTENTS

PREFACE

CONFIGURATION CHECKLIST FOR SC202

1. INTRODUCTION AND GENERAL DESCRIPTION ...................................................................... 1-1

1-1. Instrument check..................................................................................................................... 1-1

1-2. Application................................................................................................................................1-2

2. SC202 SPECIFICATIONS ..............................................................................................................2-1

2-1. General Specifications ..............................................................................................................2-1

2-2. Operating specifications............................................................................................................2-2

2-3. Model and suffix codes.............................................................................................................2-3

2-4. Intrinsic safety - common specifications....................................................................................2-3

2-5. Connection diagram for power supply ......................................................................................2-4

3. INSTALLATION AND WIRING .......................................................................................................3-1

3-1. Installation and dimensions .......................................................................................................3-1

3-1-1. Installation site.............................................................................................................3-1

3-1-2. Mounting methods ......................................................................................................3-1

3-2. Preparation ...............................................................................................................................3-3

3-2-1. Cables, terminals and glands ......................................................................................3-3

3-3. Wiring of sensors ......................................................................................................................3-4

3-3-1. General precautions ....................................................................................................3-4

3-3-2. Additional precautions for installations in hazardous areas-Intrinsic safe......................3-4

3-3-3. Hazardous Area-Non-Incendive SC202S-N.................................................................3-5

3-4. Wiring of power supply .............................................................................................................3-5

3-4-1. General precautions ....................................................................................................3-5

3-4-2. Connection of the power supply .................................................................................3-5

3-4-3. Switching the instrument on........................................................................................3-5

3-5. Sensor wiring............................................................................................................................3-6

3-6. Sensor connection using junction box and extension cable ......................................................3-6

3-7. Other sensor systems...............................................................................................................3-7

3-7-1. Sensor cable connection using junction box (BA10) and extension cable (WF10) .......3-7

4. OPERATION; DISPLAY FUNCTIONS AND SETTING ..................................................................4-1

4-1. Operator interface.....................................................................................................................4-1

4-2. Explanation of operating keys ...................................................................................................4-2

4-3. Setting passcodes ....................................................................................................................4-3

4-3-1. Passcode protection ...................................................................................................4-3

4-4. Display examples......................................................................................................................4-3

4-5. Display functions.......................................................................................................................4-4

5. PARAMETER SETTING .................................................................................................................5-1

5-1. Maintenance mode ...................................................................................................................5-1

5-1-1. Introduction.................................................................................................................5-1

5-1-2. Manual activation of HOLD..........................................................................................5-3

5-2. Commissioning mode ...............................................................................................................5-2

5-2-1. Introduction.................................................................................................................5-2

5-2-2. Range .........................................................................................................................5-3

5-2-3. HOLD..........................................................................................................................5-4

5-2-4. Temperature compensation .........................................................................................5-5

5-2-5. Temperature compensation selection ..........................................................................5-6

5-2-6. Service Code ..............................................................................................................5-7

IM 12D7B3-E-H

5-3. Service Codes ........................................................................................................................5-11

5-3-1. Parameter specific functions .....................................................................................5-12

5-3-2. Temperature compensation and measuring functions................................................5-14

5-4. Temperature compensation ....................................................................................................5-16

5-5. mA Output functions...............................................................................................................5-18

5-6. User interface .........................................................................................................................5-20

5-7. Communication setup.............................................................................................................5-22

5-8. General...................................................................................................................................5-22

5-9. Test and setup mode ..............................................................................................................5-22

6. CALIBRATION .................................................................................................................................6-1

6-1. When is calibration necessary...................................................................................................6-1

6-2. Calibration procedure................................................................................................................6-2

6-3. Calibration with HOLD active ....................................................................................................6-3

7. MAINTENANCE...............................................................................................................................7-1

7-1. Periodic maintenance for the EXA 202 transmitter ....................................................................7-1

7-2. Periodic maintenance for the sensor system.............................................................................7-1

8. TROUBLESHOOTING.....................................................................................................................8-1

8-1. Diagnostics...............................................................................................................................8-2

8-1-1. Off-line calibration checks ...........................................................................................8-2

8-1-2. On-line impedance checks..........................................................................................8-2

9. USP Water Purity Monitoring........................................................................................................9-1

9-1. What is USP? ...........................................................................................................................9-1

9-2. What is conductivity measurement according to USP?............................................................9-1

9-3. USP in the SC202? ..................................................................................................................9-1

9-4. Setting SC202 for USP.............................................................................................................9-2

10. SPARE PARTS.............................................................................................................................10-1

10-1. Itemized parts list..................................................................................................................10-1

11. APPENDIX...................................................................................................................................11-1

11-1. User setting for non-linear output table (code 31 and 35) .....................................................11-1

11-2. User entered matrix data (code 23 to 28) .............................................................................11-1

11-3. Matrix data table (user selectable in code 22........................................................................11-2

11-4 Sensor selection ...................................................................................................................11-3

11-4-1. General ...................................................................................................................11-3

11-4-2. Sensor selection......................................................................................................11-3

11-4-3. Selecting a temperature sensor...............................................................................11-3

11-5. Setup for other functions ......................................................................................................11-3

11-6. User setting table..................................................................................................................11-4

11-7. Error codes...........................................................................................................................11-6

11-8. Device Description (DD) menu structure................................................................................11-7

11-9. Field Change Order...............................................................................................................11-8

12. Test Certificate ...........................................................................................................................12-1

PREFACE

Electric discharge

The EXA analyzer contains devices that can be damaged by electrostatic discharge. When servicing this equipment, please observe proper procedures to prevent such damage. Replacement components should be shipped in conductive packaging. Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge.

Installation and wiring

The EXA analyzer should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit.

CAUTION

The Instrument is packed carefully with shock absorbing materials, nevertheless, the instrument may be damaged or broken if subjected to strong shock, such as if the instrument is dropped. Handle with care.

Although the instrument has a weatherproof construction, the transmitter can be harmed if it becomes submerged in water or becomes excessively wet.

Do not use an abrasive or solvent in cleaning the instrument.

Notice

Contents of this manual are subject to change without notice. Yokogawa is not responsible for damage to the instrument, poor performance of the instrument or losses resulting from such, if the problems are caused by:

● Improper operation by the user.

● Use of the instrument in improper applications.

● Use of the instrument in an improper environment or improper utility program.

● Repair or modification of the related instrument by an engineer not authorized by Yokogawa.

Warranty and service

Yokogawa products and parts are guaranteed free from defects in workmanship and material under normal use and service for a period of (typically) 12 months from the date of shipment from the manufacturer. Individual sales organizations can deviate from the typical warranty period, and the conditions of sale relating to the original purchase order should be consulted. Damage caused by wear and tear, inadequate maintenance, corrosion, or by the effects of chemical processes are excluded from this warranty coverage.

In the event of warranty claim, the defective goods should be sent (freight paid) to the service department of the relevant sales organization for repair or replacement (at Yokogawa discretion). The following information must be included in the letter accompanying the returned goods:

● Part number, model code and serial number

● Original purchase order and date

● Length of time in service and a description of the process

● Description of the fault, and the circumstances of failure

● Process/environmental conditions that may be related to the installation failure of the device

● A statement whether warranty or non-warranty service is requested

● Complete shipping and billing instructions for return of material, plus the name and phone number of a

contact person who can be reached for further information.

Returned goods that have been in contact with process fluids must be decontaminated/disinfected before shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed.

IM 12D7B3-E-H

WARNING

IM 12D7B3-E-H

CONFIGURATION CHECKLIST FOR SC202

Primary choices default alternatives reference on page menu

Measurement Conductivity Resistivity 5.8- 5.9 SC 01

Range 0-1000 µS/cm max. 1999 mS°C 5.3 "range"

Temperature unit Celsius Fahrenheit 5.10- 5.11 SC 11

Sensor

Cell constant 0.1 /cm any value between 0.08 and 50 5.8-5.9, 6.1- 6.3 SC 03

Sensor type 2-electrode 4- electrode 5.8- 5.9 SC 02

Temperature compensator Pt1000 Ni100, Pt100, 8k55, Pb36 5.10-5.11 SC 10

Choices

Communication enabled disable HART

(R)

, PH201*B 5.19 SC 60- 62

Burn out inactive HI or LO output on fail 5.14- 5.15 SC 32

Temperature compensation NaCl in water fixed T.C., matrix 5.12, 5.13, 5.5 SC 20- 28; "temp"

USP functionality inactive Fail if USP limits are 9.1, 9.2, 5.17 SC 57

exceeded

HOLD during maintenance inactive HOLD last value or fixed value 5.17, 5.3- 5.4 "hold", SC 50

Calibration temperature inactive adjustment +/- 15 °C 5.11 SC 12

ZERO calibration inactive adjustment +/-1 µS/cm 5.9 SC 04

Diagnostics hard alarm on hard or soft choices 5.17 SC 53

all errors

Cell fouling alarm active except E13 inactive 5.9 SC 05

Password protection inactive password for different levels 5.17 SC 52

Output in Concentration units inactive linearization of output, w% 5.14 - 5.17 SC 31/35/55

on LCD

IM 12D7B3-E-H

Introduction 1-1

1. INTRODUCTION AND GENERAL DESCRIPTION

The Yokogawa EXA 202 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 unit correctly. This manual also includes a basic troubleshooting guide to answer typical user questions.

Yokogawa can not be responsible for the performance of the EXA analyzer if these instructions are not followed.

1-1. Instrument check

Upon delivery, unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment. If damage is found, retain the original packing materials (including the outer box) and then immediately notify the carrier and the relevant Yokogawa sales office.

Make sure the model number on the textplate affixed to the side of the instrument agrees with your order. Examples of textplates are shown below.

Figure 1-1. Textplate

NOTE: The textplate will also contain the serial number and any relevant

certification marks. Be sure to apply correct power to the unit. The first two characters of the serial number refers to the year and month of manufacturing Check that all the parts are present, including mounting hardware, as specified in the option codes at the end of the model number. For a description of the model codes, refer to Chapter 2 of this manual under General Specifications.

Basic Parts List: Transmitter SC202

User’s Manual (See model code for language) Optional mounting hardware when specified (See model code)

NOTE: mounting screws and special grommet are packed in the terminal compartment.

N200

CONDUCTIVITY / RESISTIVITY

TRANSMITTER

PROGRAMMABLE 24V DC 4 TO 20 mA DC

-10 TO 55 °C

SUPPLY OUTPUT

AMB.TEMP. [ Ta ]

SERIAL No.

RANGE

MODEL

EXA SC202G

N200

CONDUCTIVITY / RESISTIVITY

TRANSMITTER

24V

4 TO 20 mA

-10

55 °C

SUPPLY OUTPUT AMB.TEMP. [ Ta

]

SERIAL No.

EEx ib [ia] IIC T4 EEx ib [ia] IIC T6 KEMA 00ATEX1069 X

IS CL I, DIV 1, GP ABCD T4 T6 HAZ LOC per Control Drawing FF1-SC202S-00

MODEL

EXA SC202S

SC202S CSA

WARNING

Substitution of components may impair intrinsic safety

AVERTISSEMENT

La substitution de composants peut compromettre la sécurité intrinsèque.

T4 for Ta -10 to 55 °C T6 for Ta -10 to 40 °C

Ex ia CL I, DIV 1, GP ABCD,

Refer to Installation Drawing

for Ta -10 to 55 °C for Ta -10 to 40 °C

0344

Amersfoort, The Netherlands

II 2 (1) G

RANGE

PROGRAMMABLE

for Ta -10 to 55 °C for Ta -10 to 40 °C

N200

CONDUCTIVITY / RESISTIVITY

24V

4 TO 20 mA

-10

55 °C

SUPPLY OUTPUT AMB.TEMP. [ Ta

]

SERIAL No.

EEx nA [L] IIC T4 EEx nA [L] IIC T6 KEMA 00ATEX1070 X

NI CL I, DIV 2, GP ABCD T4 T6 HAZ LOC per Control Drawing FF1-SC202S-00

MODEL

EXA SC202S-N

SC202S CSA

WARNING

Substitution of components may impair suitability for

AVERTISSEMENT

La substitution de composants peut rendre ce materièl inacceptable pour les emplacements de

NI CL I, DIV 2, GP ABCD

Refer to Installation Drawing

for Ta -10 to 55 °C for Ta -10 to 40 °C

0344

Amersfoort, The Netherlands

II 3 G

RANGE

PROGRAMMABLE

for Ta -10 to 55 °C for Ta -10 to 40 °C

TRANSMITTER

T4T6for Ta -10 to 55 °C

for Ta -10 to 40 °C

Class I, Division 2.

Classe I, Division 2.

Y = Year M = Month

2000 M January 1 2001 N February 2 2002 P March 3 2003 R April 4

........ .. .......... ..

2008 W September 9 2009 X October O 2010 A November N 2011 B December D

IM 12D7B3-E-H

1-2 Introduction

1-2. Application

The EXA transmitter is intended to be used for continuous on-line measurement in industrial installations. The unit combines simple operation and microprocessor-based performance with advanced self-diagnostics and enhanced communications capability to meet the most advanced requirements. The measurement can be used as part of an automated process control system. It can also be used to indicate dangerous limits of a process, to monitor product quality, or to function as a simple controller for a dosing/neutralisation system.

Yokogawa designed the EXA analyzer to withstand harsh environments. The transmitter may be installed either indoors or outside because the IP65 (NEMA4X) housing and cabling glands ensure the unit is adequately protected. The flexible polycarbonate window on the front door of the EXA allows pushbutton access to the keypad, thus preserving the water and dust protection of the unit even during routine maintenance operations. A variety of EXA hardware is optionally available to allow wall, pipe, or panel mounting. Selecting a proper installation site will permit ease of operation. Sensors should normally be mounted close to the transmitter in order to ensure easy calibration and peak performance. If the unit must be mounted remotely from the sensors, WF10 extension cable can be used up to a maximum of 50 metres (150 feet) with a BA10 junction box.

The EXA is delivered with a general purpose default setting for programmable items. (Default settings are listed in Chapter 5 and again in Chapter 11). While this initial configuration allows easy start-up, the configuration should be adjusted to suit each particular application. An example of an adjustable item is the type of temperature sensor used. The EXA can be adjusted for any one of five different types of temperature sensors.

To record such configuration adjustments, write changes in the space provided in Chapter 11 of this manual. Because the EXA is suitable for use as a monitor, a controller or an alarm instrument, program configuration possibilities are numerous.

Details provided in this user’s manual are sufficient to operate the EXA with all Yokogawa sensor systems and a wide range of third-party commercially available probes. For best results, read this manual in conjunction with the corresponding sensor user’s manual.

Yokogawa designed and built the EXA to meet the CE regulatory standards. The unit meets or exceeds stringent requirements of EN 55082-2, EN55022 Class A without compromise, to assure the user of continued accurate performance in even the most demanding industrial installations.

IM 12D7B3-E-H

Specifications 2-1

2. GENERAL SPECIFICATIONS 2-1. Specifications

A. Input specifications : Two or four electrodes measurement

with square wave excitation. Cell constants from 0.008 to 50 cm-1 WU40 sensor cable up to 20m. Up to 60m total using BA10 junction box and WF10 extension cable

B. Detection method : Frequency, read-pulse position and

reference voltage are dynamically optimized.

C. Input ranges

- Conductivity : 0.000 µS/cm to 1999 mS/cm at 25 °C (77 °F) reference temperature.

Minimum : 0.2 µS x C at process temperature

(underrange 0.000 µS/cm).

Maximum : 500 mS x C at process temperature

(overrange 550 mS x C).

- Resistivity : 0.000 kΩ - 999 MΩ/C at 25 °C (77 °F) reference temperature.

Minimum : 0.002 kΩ/C at process temperature

(underrange 0.000 kΩ x cm).

Maximum : 5 MΩ/C at process temperature

(overrange 999 MΩ x cm).

- Temperature

Pt1000 : -20 to +250 °C (0 - 500 °F) Pt100 and Ni100 : -20 to +200 °C (0 - 400 °F) 8K55 NTC : -10 to +120 °C (10 - 250 °F) Pb36 NTC : -20 to +120 °C (0 - 250 °F)

D. Output Span

- Conductivity : - min 0.01µS/cm

: - max. 1999 mS/cm. (max 90% zero

suppression)

- Resistivity : - min 0.001kΩxcm

: - max. 999 MΩ x cm. (max 90% zero

suppression)

- Temperature : Dependent on temp. sensor type:

Sensor type min. max. Pt1000 25 °C (50 °F) 250 °C (500 °F) Pt100, Ni100 25 °C (50 °F) 200 °C (400 °F) Pb36 NTC, 8k55 NTC 25 °C (50 °F) 100 °C (200 °F)

The instrument is user programmable for linear or non-linear conductivity ranges.

E. Transmission Signal

: Isolated output of 4-20 mA DC .

Maximum load 425 Ω. Burn up (22 mA) or Burn down (3.9 mA) or pulse of 22mA to signal failure. See Fig.2-1 and 2-2.

F. Temperature compensation

: Automatic, for temperature ranges

mentioned under C (inputs).

- Reference temp. : programmable from 0 to 100 °C or 30 - 210 °F (default 25 °C).

G. Compensation algorithm

-NaCl : According IEC 746-3 NaCl tables (default).

-T.C. : Two independent user programmable temperature coefficients, from -0.00% to 3.50% per °C (°F) by adjustment or calibration.

- Matrix : : Conductivity function of concentration and temperature. Choice out of 5 preprogrammed matrixes and a 25-point user-programmable matrix.

H. Serial Communication

: Bi-directional according to HART

digital communication super imposed on the 4-20mA signal.

I. Logbook : Software record of important events

and diagnostic data. Available through HART interface.

J. Display : Custom liquid crystal display, with a

main display of 3

/2digits 12.5 mm high. Message display of 6 alphanumeric characters, 7 mm high. Warning flags and units (mS/cm, kΩ.cm, µS/cm and MΩ.cm) as appropriate.

K. Power supply : Nominal 24 volt DC loop powered

system.

SC202G ; up to 40 volts SC202S : up to 31.5 volts

Note: The transmitter contains a switched

power supply. The transmitter requires a minimum Power voltage in order to work correctly, which is dependant on the load. Please refer to figures 2-1 and 2-2 for the correct power supply.

Fig. 2-1. Supply voltage/ load diagram

Fig. 2-2. Minimum terminal voltage at the SC202

0.0

200.0

400.0

600.0

800.0

1000.0

1200.0

12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

4 mA

22 mA

425.0

775.0

31.5 V

(limit for IS version)

Voltage (V)

Load Resistance (Ω)

230.0

1100.0

Communication

Range

17 Volts

14.5 Volts

4 mA 7 mA 20 mA

Terminal voltage (V)

Output Current (mA)

IM 12D7B3-E-H

2-2 Specifications

L. Input isolation : 1000 VDC

M. Shipping Details : Package size w x h x d

290 x 225 x 170 mm.

11.5 x 8.9 x 6.7 in. Packed weight approx. 2.5 kg (5lb).

2-2. Operating specifications

A. Performance : Conductivity

- Accuracy : ≤ 0.5 % ± 0.02 mA

Performance : Resistivity

- Accuracy : ≤ 0.5 % ± 0.02 mA

Performance : Temperature with Pt1000Ω, Ni100Ω

and Pb36 NTC

- Accuracy : ≤ 0.3 °C ± 0.02 mA

Performance : Temperature with PT100Ω and

8k55Ω

- Accuracy : ≤ 0.4 °C ± 0.02 mA

Performance : Temperature compensation

- NaCl table : ≤ 1 %

- Matrix : ≤ 3 %

- Ambient influence : ≤ 0.05 %/°C

- Step response : 90 % (< 2 decades) in ≤ 7 seconds

B. Ambient operating temperature

: -10 to +55

C (-10 to 130 ºF)

Excursions to -30 to +70

C (-20 to 160 ºF) will not damage the instrument, specification maybe adversely affected

Drift < 500 ppm/°C

C. Storage temperature

: -30 to +70

C (-20 to 160 ºF)

D. Humidity : 10 to 90% RH non-condensing

E. HART specification

- Min. cable diameter : 0.51 mm, 24 AWG

- Max. cable length : 1500 m Detailed information can be found at: www.hartcomm.org

F. Housing : Cast aluminium case with chemically

resistant coating, cover with flexible polycarbonate window. Case color is off-white and cover is moss green. Cable entry is via two

/2” polyamide glands. Cable terminals are provided for up to 2.5 mm

finished wires. Weather resistant to IP65 and NEMA 4X standards. Pipe wall or panel mounting, using optional hardware.

2-3. Model and suffix codes

G. Data protection : EEPROM for configuration and log-

book, and lithium battery for clock.

H. Watchdog timer : Checks microprocessor

I. Automatic safeguard : Return to measuring mode when no

keystroke is made for 10 min.

J. Operation protection : 3-digit programmable password.

K Regulatory compliance

- EMC : meets council directive 89/336/EEC

- Emmission : meets EN 55022 Class A

- Immunity : meets EN 61000-6-2

L) Intrinsic safety

- ATEX

: EEx ib [ia] IIC T4 for Ta -10 to 55 ºC

EEx ib [ia] IIC T6 for Ta -10 to 40 ºC

II 2 (1) G

KEMA 00ATEX1069 X

- CSA : Ex ia CL I, DIV 1, GP ABCD, T4 for Ta -10 to 55 ºC T6 for Ta -10 to 40 ºC Refer to Installation Drawing SC202S CSA

- FM : IS CL I, DIV 1, GP ABCD T4 for Ta -10 to 55 ºC T6 for Ta -10 to 40 ºC HAZ LOC per Control Drawing FF1-SC202S-00

M) Non-Incendive

- FM : NI CL I, DIV 2, GP ABCD T4 for Ta -10 to 55 ºC T6 for Ta -10 to 40 ºC HAZ LOC per Control Drawing FF1-SC202S-00

- CSA : NI CL I, DIV 2, GP ABCD T4 for Ta -10 to 55 ºC T6 for Ta -10 to 40 ºC Refer to Installation Drawing SC202S CSA

- ATEX : EEx nA [L] IIC T4 for Ta -10 to 55 ºC EEx nA [L] IIC T6 for Ta -10 to 40 ºC

II 3 G

KEMA 00ATEX1070 X

N. DD specification : The SC202 Device Description

is available enabling communications with the Handheld Communicator (HCC) and compatible devices.

Model Suffix Code Option code Description

SC202G Conductivity Transmitter, General Purpose version SC202S Conductivity Transmitter, Intrinsic Safe version Type - A Milli-amp (+HART) version

- F FOUNDATION ® Fieldbus version

- N Non-Incendive Milli-amp (+HART) version

- B Non-Incendive FOUNDATION ® Fieldbus version

- E Always E

Options /H Hood for Sun Protection

/U Pipe & Wall mounting hardware /SCT Stainless steel tagplate /Q Calibration certificate

Specifications 2-3

IM 12D7B3-E-H

Safe area

Output

Supply

SENSOR

terminal 11-16

+ _

Hazardous area Safe area

+ _

Protective earth

+ _

Load

Resistance

Uo = 31.5 Volts DC Io = 100 mA

Hazardous area

Protective earth

+ _

24 volts DC Nominal

Supply Voltage.

SENSOR

terminal 11-16

EEX ib Certified safety barrier or power supply with Rint= 300Ω (HART compatible)

Intrinsically safe design

II 2 (1) G EEX ib [ia] IIC: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC Certificate nr. KEMA 00 ATEX 1069 X EXA SC202S analyzer

Uo = 31.5 Volts DC Io = 100 mA Po = 1.2 Watt

EEX ib Certified Repeater Power supply (HART compatible)

Intrinsically safe design

II 2 (1) G EEX ib [ia] IIC: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC Certificate nr. KEMA 00 ATEX 1069 X EXA SC202S analyzer

Zone 0 or 1

Zone 1

Zone 0 or 1

Zone 1

Figure 1

Figure 2

• Sensor(s) are of a passive type to be regarded as ‘simple apparatus’, devices which comply with clause 1.3 of the EN 50014.

• Electrical data of the EXASC202S.

- Supply and output circuit (terminals + and -):

Maximum input voltage Ui= 31.5 V.

Maximum input current I

= 100 mA.

Maximum input power P

= 1.2 W

Effective internal capacitance Ci= 22 nF.

Effective internal inductance Li= 22 µH.

- Sensor input circuit (terminals 11 through 16):

Maximum output voltage Uo= 14.4 V.

Maximum output current Io= 12.8 mA.

Maximum allowed external capacitance C

= 103 nF.

Maximum allowed external inductance L

= 200 mH.

• Barriers and power supply specification must not exceed the maximum values as shown in the diagram above. These safety

descriptions cover most of the commonly used industry standard barriers, isolators and power supplies.

• The Hand Held Communicator must be of a ATEX certified intrinsically safe type in case it is used on the intrinsically safe circuit in

the hazardous area or of a ATEX certified non-incendive type in case it is used in the non-incendive circuit in the hazardous area.

ATEX intrinsic safe and non-incendive diagrams for SC202S-A

2-3. Connection diagrams for power supply

2-4 Specifications

IM 12D7B3-E-H

Safe area

Output

Supply

SENSOR(S)

terminal 11-16

+ _

Hazardous area Safe area

+ _

Protective earth

+ _

Load

Resistance

Hazardous area

Protective earth

+ _

24 volts DC Nominal

Supply Voltage.

SENSOR(S)

terminal 11-16

CSA certified Safety barrier or power supply (Hart compatible)

Intrinsically safe design CSA Ex ia Class I, Div. 1, Group ABCD, T4 for ambient temp. < 55 ºC

EXA SC202S analyzer

T6 for ambient temp. < 40 ºC

CSA certified Power supply (Hart compatible)

For electrical data: see text below

Suitable values are: Vmax = 31.5 Volts DC I

max = 100 mA

Suitable values are: V

max = 31.5 Volts DC

Imax = 100 mA Pmax = 1.2 Watt

Intrinsically safe design CSA Ex ia Class I, Div. 1, Group ABCD, T4 for ambient temp. < 55 ºC

EXA SC202S analyzer

T6 for ambient temp. < 40 ºC

with Rint = 300 Ohm

Figure 1

Figure 2

• Sensor is a thermocouples, RTD’s, passive resistive switch devices, or is CSA entity approved and meet connection requirements.

• Electrical data of the EXA SC202S :

- Supply and output circuit (terminals + and -)

Maximum input voltage V

max

= 31.5 V.

Maximum input current I

max

= 100 mA.

Maximum input power P

max

= 1.2 W.

Effective internal capacitance Ci= 22 nF.

Effective internal inductance Li= 22 µH.

- Sensor input circuit (terminals 11 through 16):

Maximum output voltage Voc= 14.4 V.

Maximum output current Isc= 12.8 mA.

Maximum allowed external capacitance Ca= 103 nF.

Maximum allowed external inductance La= 200 mH.

• Barriers and power supply should be CSA certified. The specifications must not exceed the maximum values as shown in the dia-

gram above. Installation should be in accordance with Canadian Electrical Code, Part I or CEC, Part I.

Maximum safe area voltage should not exceed 250 VRMS.

For Class I, Div. 2, Group ABCD the CSA certified barrier is not required, and the Sensor input circuit (terminals 11 through 16) is

non-incendive having the parameters:

Maximum output voltage V

= 14.4 V.

Maximum output current I

= 12.8 mA.

Maximum allowed external capacitance C

= 1.4 µF.

Maximum allowed external inductance La= 900 mH.

• The Hand Held Communicator must be of a CSA certified intrinsically safe type in case it is used on the intrinsically safe circuit in

the hazardous area, or of a CSA certified non-incendive type in case it is used on the non-incendive circuit in the hazardous area.

CSA intrinsic safe and non-incendive diagrams for SC202S-A

IM 12D7B3-E-H

2-5 Specifications

Unclassified Location

Output

Supply

+ _

Classified Location

Protective earth

+ _

FM Approved Power supply (HART compatible)

Intrinsically safe design FM Class I. Div. 1, Group ABCD: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC

EXA SC202S analyser

see text below

For electrical data:

Classified Location

Unclassified Location

+ _

Protective earth

+ _

Load

Resistance

24 volts DC Nominal

Supply Voltage.

Safety barrier or power supply (HART compatible)

Intrinsically safe design FM Approved FM Class I. Div. 1, Group ABCD: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC

EXA SC202S analyser

with R

int

= 300 Ω

For electrical data: see text below

SENSOR(S)

terminal 11-16

Max. cable length: 60 mtr.

Cable diam.: 3 to 12mm

SENSOR(S)

terminal 11-16

Max. cable length: 60 mtr.

Cable diam.: 3 to 12mm

Figure 1

Figure 2

Suitable values are: Voc or Vt ≤ 31.5 Volt DC lsc or lt ≤ 100 mA Psc or Pt ≤ 1.2 Watt

Suitable values are: Voc or Vt ≤ 31.5 Volt DC Isc or It ≤ 100 mA

• Electrical data of the EXA SC202S:

- Supply circuit (terminals + and -): - Sensor input circuit (terminals 11 through 16):

Maximum input voltage V

max

= 31.5 V. - Maximum output voltage Vt= 14.4 V.

Maximum input current I

max

= 100 mA. - Maximum output current It= 12.8 mA.

Maximum input power Pi= 1.2 W. - Maximum allowed external capacitance Ca= 103 nF.

Effective internal capacitance Ci= 22 nF. - Maximum allowed external inductance La= 200 mH.

Effective internal inductance L

= 22 µH.

• If Hand Held Terminal (HHT) is not connected to the power supply lines of the EXA SC202S (see figure 1):

Any FM Approved barrier or power supply may be used that meets the following requirements.

or V

≤ 31.5 V; I

or I

≤ 100 mA; Ca≥ 22 nF + C

cable

; L

a ≥ 22 µH + L

cable

If HHT is connected to the power supply lines of the EXA SC202S (see figure 2):

The Hand Held Terminal must be FM Approved. Refer to the manufacturers control drawing of the HHT and the barrier/power

supply to determine the cable parameters.

or Vt) + V

HHT

≤ 31.5 V; (I

or It) + I

HHT

≤ 100 mA; Ca≥ 22 nF + C

cable

+ C

HHT

; L

≥ 22 mH + L

cable

+ L

HHT

When installing this equipment, follow the manufacturer’s installation drawing.

Installation should be in accordance with ANSI/ISA RP 12.06.01 "Installation of Intrinsically Safe Systems for Hazardous

(Classified) Locations" and the National Electrical Code (ANSI/NFPA 70).

Control equipment connected to the barrier/power supply must not use or generate more than 250 Vrms or Vdc.

• Resistance between Intrinsically Safe Ground and earth ground must be less than 1.0 Ω

WARNING

- Substitution of components may impair Intrinsic Safety

To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing or read, understand and

adhere to the manufacturer’s’live maintenance procedures.

FM intrinsic safe diagrams for SC202S-A

IM 12D7B3-E-H

Unclassified Location

+ _

Classified Location

Protective earth

Intrinsically safe design FM Class I. Div. 2. Group ABCD: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC

EXA SC202S analyser

see text below

For electrical data:

SENSOR(S)

terminal 11-16

Max. cable length: 60 mtr.

Cable diam.: 3 to 12mm

Classified Location

Unclassified Location

+ _

Protective earth

+ _

Load

Resistance

FM approved power supply

≤ 31.5 VDC

Intrinsically safe design FM Class I. Div. 2, Group ABCD: T4 for ambient temperature < 55 ºC

T6 for ambient temperature < 40 ºC

EXA SC202S analyser

For electrical data:

see text below

SENSOR(S)

terminal 11-16

Max. cable length: 60 mtr.

Cable diam.: 3 to 12mm

FM approved power supply

≤ 31.5 VDC

+ _

Figure 2

Figure 1

• Electrical data of the EXA SC202S:

- Supply circuit (terminals + and -): - Sensor input circuit (terminals 11 through 16):

Maximum input voltage V

max

= 31.5 V. Maximum output voltage Vt= 14.4 V.

Maximum input power Pi= 1.2 W Maximum output current It= 12.8 mA.

Effective internal capacitance Ci= 22 nF Maximum allowed external capacitance Ca= 1.4 µF.

Effective internal inductance Li= 22 µH Maximum allowed external inductance La= 900 mH.

• The Hand Held Terminal must be FM Approved in case it is used in the classified location.

When installing this equipment, follow the manufacturers installation drawing. Installation shall be in accordance with Article

501.4(B) of the National Electrical Code (ANSI/NFPA 79).

Nonincendive field wiring may be installed in accordance with Article 501.4(B)(3)

• Grounding shall be in accordance with Article 250 of the National Electrical code

WARNING

- Substitution of components may impair suitability for Division 2

- Do not remove or replace while circuit is live unless area is know to be non-hazardous

- Explosion Hazard – Do not disconnect equipment unless area is know to be non-hazardous

- Do not reset circuit breaker unless power has been removed from the equipment or the area is know to be non-hazardous

FM non-incendive diagrams for SC202S-N

IM 12D7B3-E-H

Installation and wiring 3-1

3. INSTALLATION AND WIRING

3-1. Installation and dimensions

3-1-1. Installation site

The EXA transmitter is weatherproof and can be installed inside or outside. It should, however, be installed as close as possible to the sensor to avoid long cable runs between sensor and transmitter. In any case, the cable length should not exceed 60 meters (200 feet). Select an installation site where:

● Mechanical vibrations and shocks are negligible

● No relay/power switches are in the direct environment

● Access is possible to the cable glands (see figure 3-1)

● The transmitter is not mounted in direct sunlight or severe weather conditions

● Maintenance procedures are possible (avoiding corrosive environments)

The ambient temperature and humidity of the installation environment must be within the limits of the instrument specifications. (See chapter 2).

3-1-2. Mounting methods

Refer to figures 3-2 and 3-3. Note that the EXA transmitter has universal mounting capabilities:

● Panel mounting using two (2) self-tapping screws

● Surface mounting on a plate (using bolts from the back)

● Wall mounting on a bracket (for example, on a solid wall)

● Pipe mounting using a bracket on a horizontal or vertical pipe (maximum pipe diameter 50 mm)

Fig. 3-2. Panel mounting diagramFig. 3-1. Housing dimensions and layout of

glands

115 (4.5)

92 (3.6)

162 (6.4)

180 (7)

56±0.2

(2.20)

M6 bolts (2x)

30 (1.2)

1/2" INPUT

1/2" SUPPLY

min. 203 (min. 8.0)

154 (6.06)

(1.18)

2x ø4 (0.16)

SPACING PANEL

CUT-OUT DIMENSIONS

CUT-OUT DIMENSION

172

(6.77)

min.229

(min.9.0)

(1.18)

115 (4.5)

92 (3.6)

2" ND pipe

OPTION /U: Universal pipe/wall mounting

wall mounting pipe mounting pipe mounting (vertical) (horizontal)

2x ø6.5 (0.26)

4x ø10 (0.4)

200

(7.87)

(2.75)

(2.20)

IM 12D7B3-E-H

3-2 Installation and wiring

Figure 3-4. Internal view of EXA wiring compartment

Figure 3-3. Wall and pipe mounting diagram

IM 12D7B3-E-H

Installation and wiring 3-3

3-2. Preparation

Refer to figure 3-4. The power/output connections and the sensor connections should be made in accordance with the diagram on page 3-6. The terminals are of a plug in style for ease of mounting.

To open the EXA 202 for wiring:

1. Loosen the four frontplate screws and remove the cover.

2. The terminal strip is now visible.

3. Connect the power supply. Use the gland on the left for this cable.

4. Connect the sensor input, using the gland on the right (see fig. 3-5). Switch on the power. Commission the instrument as required or use the default settings.

5. Replace the cover and secure frontplate with the four screws.

6. Connect the grounding terminals to protective earth.

7. The optional hose connection is used to guide the cables coming from an immersion fitting through a protective plastic tubing to the transmitter.

3-2-1. Cables, terminals and glands

The SC202 is equipped with terminals suitable for the connection of finished cables in the size range: 0.13 to 2.5 mm (26 to 14 AWG). The glands will form a tight seal on cables with an outside diameter in the range of 7 to 12 mm (9/32 to 15/32 inches).

Figure 3-5. Glands to be used for cabling

SENSOR

CABLE GLAND

POWER/OUTPUT

CABLE GLAND

GROUNDING TERMINAL

IM 12D7B3-E-H

3-4 Installation and wiring

Figure 3-6. System configuration

3-3. Wiring of sensors

3-3-1. General precautions

Generally, transmission of signals from SC sensors is at a low voltage and current level. Thus a lot of care must be taken to avoid interference. Before connecting sensor cables to the transmitter make sure that following conditions are met: – the sensor cables are not mounted in tracks together with high voltage and or power switching cables – only standard sensor cables or extension cable are used – the transmitter is mounted within the distance of the sensor cables (max. 10 m) + up to 50m WF10

extension cable.

– the setup is kept flexible for easy insertion and retraction of the sensors in the fitting.

3-3-2. Additional precautions for installations in hazardous areas - Intrinsic safe

Make sure that the total of capacitances and inductances connected to the input terminals of the EXA SC202S do not exceed the limits given in the certificate. This sets a limit to the cable and extensions used. – The intrinsic safe version of the EXA 202 instrument can be mounted in Zone 1. – The sensors can be installed in Zone 0 or Zone 1 if a safety barrier according to the limits given in the

system certificate is used.

– Ensure that the total of capacitances and inductances connected to the terminals of the EXA SC202 do

not exceed the limits given in the certificate of the safety barrier or distributor. – The cable used should preferably have a BLUE colour or marking on the outside. – Installation for (sensors in Zone 0 or 1):

Generally, the distributor with input/output isolation has no external earth connection. If there is an earth

connection on the distributor and the external connection of the transmitter is connected to "protective"

earth, the shield of the 2-wire cable may NOT be connected to "protective" earth at the distributor too.

INPUT

OUTPUT/SUPPLY

Safety Barrier SC202S only

SENSORS

2,5 or 10 m

DISTRIBUTOR

RECORDER

COMPUTER

HAND HELD

COMMUNICATOR

CURRENT OUTPUT

NO MODEYES

ENT

FAILHOLD

YES NO

ENT

MEASURE

MAN.CAL DISPLA

HOLD

YOKOGAWA

MODE

TEMP

AUT.CAL

180

18 0

100

Installation and wiring 3-5

3-3-3. Installation in: Hazardous Area-Non-Incendive

The SC202S-N may be installed in a Category 3/ Zone 2/ Div.2 area without the use of safety barriers. Maximum permissible supply voltage 31.5V

3-4. Wiring of power supply

3-4-1. General precautions

Do not activate the power supply yet. First make sure that the DC-power supply is according to the specifications given.

DO NOT USE ALTERNATING CURRENT OR MAINS POWER SUPPLY! !

The cable leading to the distributor (power supply) or safety barrier transports power to and output signal from the transmitter. Use a two conductor shielded cable with a size of at least 1.25 mm

and an outside diameter of 7 to 12 mm. The cable gland supplied with the instrument accepts these diameters. The maximum length of the cable is 2000 metre, or 1500 metres when using the communications. This ensures the minimum operating voltage for the instrument.

Grounding:

• If the transmitter is mounted on a grounded surface (e.g. a metal frame fixed in the soil) the shield of the

2-wire cable may NOT be connected to ground at the distributor.

• If the transmitter is mounted on a non-conducting surface (e.g. a brick wall) it is recommended to ground

the shield of the 2-wire cable at the distributor end.

3-4-2. Connection of the power supply

The terminal strip is accessed as was described in section 3-2-1. Use the left-hand gland to insert the supply/ output cable to the transmitter. Connect the supply to the terminals marked +, - and G as is indicated in figures 3-11.

3-4-3. Switching the instrument on

After all connections are made and checked, the power can be switched on from the distributor. Observe the correct activation of the instrument at the display. If for any reason the display does not indicate a value, consult the trouble shooting section.

IM 12D7B3-E-H

WARNING

2 3

white brown green

yellow grey pink

Fig. 3-7. Connection diagrams

3-6 Installation and wiring

IM 12D7B3-E-H

3-5. Sensor wiring

Refer to figure 3-9, which includes drawings that outline sensor wiring.

The EXA SC202 can be used with a wide range of commercially available sensor types if provided with shielded cables, both from Yokogawa and other manufacturers. The sensor systems from Yokogawa fall into two categories, the ones that use fixed cables and the ones with separate cables.

To connect sensors with fixed cables, simply match the terminal numbers in the instrument with the identification numbers on the cable ends.

The separate sensors and the WU40-LHhh cables are also numbered, but the numbers do not always match with the terminal numbers in the instrument. Figure 3-9 indicates how to connect the different sensor types.

3-6. Sensor connection using junction box and extension cable

Where a convenient installation is not possible using the standard cables between sensors and transmitter, a junction box and extension cable may be used. The Yokogawa BA10 junction box and the WF10 extension cable should be used. These items are manufactured to a very high standard and are necessary to ensure that the specifications of the system can be met. The total cable length should not exceed 60 metres (e.g. 10 m fixed cable and 50 m extension cable).

NOTE: Numbers 17 of both WF10 and BA10 do not need to be used.

11 TEMPERATURE 12 TEMPERATURE 13 CELL 14 CELL 15 CELL 16 CELL

CONDUCTIVITY / RESISTIVITY TRANSMITTER

SEPARATE SENSORS WITH WU40-LH . . CABLE

11 TEMPERATURE 12 TEMPERATURE 13 OUTER ELECTRODE 14 OUTER ELECTRODE 15 INNER ELECTRODE 16 INNER ELECTRODE

SC4A... SENSORS WITH INTEGRATED CABLE

RED

11 TEMPERATURE 12 TEMPERATURE 13 OUTER ELECTRODE 14 OUTER ELECTRODE 15 INNER ELECTRODE 16 INNER ELECTRODE

YELLOW / GREEN

BROWN BROWN

1 2

SX42-SX . . - . F SENSORS

Figure 3-9. Sensor wiring diagrams

IM 12D7B3-E-H

Installation and wiring 3-7

3-7-1. Sensor cable connections using junction box (BA10) and extension cable (WF10)

Where a convenient installation is not possible using the standard cables between sensors and transmitter, a junction box and extension cable may be used. The Yokogawa BA10 junction box and the WF10 extension cable should be used. These items are manufactured to a very high standard and are necessary to ensure that the specifications of the system are not compromised. The total cable length should not exceed 60 metres (e.g. 5 m fixed cable and 55 m extension cable).

3-7. Other sensor systems

To connect other sensor systems, follow the general pattern of the terminal connections as listed below: 11 and 12 : Always used for temperature compensation resistor input. 13 and 14 : Normally used for the outer electrode 15 and 16 : Used for inner electrode In case a 4-electrode measuring system will be used, 14 and 16 should be used for the current electrodes. Please ensure that shielded cabling will be used. In figure 3-10 this is shown in a schematic way.

Figure 3-10. Connection diagram for other sensors

Figure 3-11. Terminal identification label

11 12

14 15 16

11 12

14 15 16

11 12 1413 15 16

+ - + - G

HART SUPPLY SENSOR

2-electrode configuration

4-electrode configuration

IM 12D7B3-E-H

3-8 Installation and wiring

14 Overall Screen

13 14 14

16 15

1314141615

11 Red

12 Blue

15 Core 16 Screen

White Co-axial cable

13 Core 17 Screen Brown Co-axial Cable

WF10 Cable

TRANSMITTER / CONVERTER

Overall shield

Screen

Red

White

Blue

Brown

Thermistor (Temperature sensor)

Ground (Shield)

Secondary Coil

Primary Coil

Fig. 3-12. Connection of WF10 extension cable and BA10/BP10 junction box

NOTE: See page 3-10 for termination for WF10 cable in combination with EXA SC

Installation and wiring 3-9

IM 12D7B3-E-H

Extension cable may be purchased in bulk quantities, cut to length. Then it is necessary to terminate the cable as shown below.

Termination procedure for WF10 cable.

1. Slide 3 cm of heat shrink tube (9 x 1.5) over the cable end to be terminated.

2. Strip 9 cm of the outer (black) insulating material, taking care not to cut or damage internal cores.

3 cm

heat shrink

9 cm

remove insulation

Fig. 3-13a.

3. Remove loose copper screening, and cut off the cotton packing threads as short as possible.

4. Strip insulation from the last 3 cm of the brown, and the white coaxial cores.

3 cm

cotton threads

Fig. 3-13b.

5. Extract the coaxial cores from the braid, and trim off the black (low-noise) screening material as short as possible.

6. Insulate the overall screen and drain wire (14) and the 2 coaxial screens with suitable plastic tubing.

7. Strip and terminate all ends with suitable (crimp) terminals and identify with numbers as shown.

Fig. 3-13c.

8. Finally shrink the overall heat shrink tube into position.

IM 12D7B3-E-H

4. OPERATION; DISPLAY FUNCTIONS AND SETTING

4-1. Operator interface

This section provides an overview of the operation of the EXA operator interface. The basic procedures for obtaining access to the three levels of operation are described briefly. For a step-by-step guide to data entry, refer to the relevant section of this user’s manual. Figure 4-1 shows the EXA operator interface.

LEVEL 1: Maintenance

These functions are accessible by pushbutton through a flexible front cover window. The functions make up the normal day-to-day operations that an operator may be required to complete. Adjustment of the display and routine calibration are among the features accessible in this way. (See table 4-1).

LEVEL 2: Commissioning

A second menu is exposed when the EXA front cover is removed and the display board is revealed. Users gain access to this menu by pressing the button marked

in the lower right of the display board. This menu is used to set such values as the output ranges and hold features. It also gives access to the service menu. (See table 4-1).

LEVEL 3: Service

For more advanced configuration selections, press the button marked

, then press “NO” repeatedly until you reach SERVICE. Now push the “YES” button. Selecting and entering “Service Code” numbers in the commissioning menu provide access to the more advanced functions. An explanation of the Service Codes is listed in chapter 5 and an overview table is shown in chapter 11.

Table 4-1. Operations overview

Routine Function Chapter

Maintenance CALIB Calibration with a standard solution or sample 6

DISPLAY 1&2 Read auxiliary data or set message display 4

HOLD Switch hold on/off (when activated) 5

Commissioning OUTPUT Adjust the output range 5

SET HOLD Activate the hold function 5

TEMP 1 & 2 Select method of temperature compensation 5

Service SERVICE Fine tune the specialized functions of the 5

(Access to coded entries transmitter

from the commissioning

level)

NOTE: All three levels may be separately protected by a password. See Service Code 52 in chapter 5 Service Code table for details on setting passwords.

Installation and wiring 3-10

IM 12D7B3-E-H

4-1 Operation

Figure 4-1. SC202 operator interface

4-2. Explanation of operating keys MODE key This key toggles between the measuring and maintenance modes. Press once to obtain

access to the maintenance function menu.

CALIB DISP 1 DISP 2 - (Only when second temp. compensation enabled) HOLD - (only when enabled)

Press again to return to the measuring mode (press twice when hold is activated).

YES/NO keys These are used to select choices from the menu.

YES is used to accept a menu selection. NO is used to reject a selection, or to move ahead to the next option.

DATA ENTRY keys ( ENT)

> is used as a “cursor” key. Each press on this key moves the cursor or flashing digit

one place to the right. This is used to select the digit to be changed when entering numerical data. is used to change the value of a selected digit. Each press on this key increases the value by one unit. The value can not be decreased, so in order to obtain a lower value, increase past nine to zero, then increase to the required number.

ENT When the required value has been set using the > and ^ keys, press ENT to confirm

the data entry. Please note that the EXA does not register any change of data until the ENT key is pressed.

key This is the commissioning mode key. It is used to obtain access to the commissioning

menu. This can only be done with the cover removed or opened. Once this button has been used to initiate the commissioning menu, follow the prompts and use the other keys as described above.

ENT

HOLD FAIL

YES NO

ENT

NO MODEYES

MODE

MEASURE CAL DISPLAY HOLD

OUTPUT SET HOLD TEMP. SERVICE

Output hold flag

Fail flag

Menu pointer flags

Commissioning function menu

Commissioning mode access key

Measure/Maintenance mode key

Broken line indicates area that can be seen through front cover

Adjustment keys > : Choose digit to

adjust ^ : Adjust digit ENT : Confirm change

Selection keys YES : Accept setting NO : Change setting

Key prompt flags

Message display

Main display

Units

IM 12D7B3-E-H

Operation 4-2

4-3. Setting passcodes

4-3-1. Passcode protection

In Service Code 52, EXA users can set passcode protection for each one of the three operating levels, or for any one or two of the three levels. This procedure should be completed after the initial commissioning (setup) of the instrument. The passcodes should then be recorded safely for future reference.

When passcodes have been set, the following additional steps are introduced to the configuration and programming operations:

Maintenance

Press MODE key. The display shows 000 and *PASS* Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Maintenance Mode

Commissioning

Press

key. The display shows 000 and *PASS*

Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Commissioning Mode.

Service

From the commissioning menu, select *Service by pressing YES key. The display shows 000 and *PASS* Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Service Mode.

NOTE: See Service Code 52 for the setting of passcodes.

4-4. Display examples

The following pages show the sequence of button presses and screens displayed when working in some standard configurations. More or less options will be made available by the configuration of some service codes, or by choices made in the commissioning menu.

The following deviations are possible:

Item marked is omitted when switched off in commissioning mode.

Temperature compensation will be displayed dependent on chosen compensation method: NaCl, TC or matrix.

DISP.2 only appears if a 2nd (different) temperature compensation is set.

W/W % only appears if switched on in service code 55. In display 2 w/w % never appears.

***

IM 12D7B3-E-H

S/cm

MODE

S/cm

Process

tempe-

rature

YES NO

S/cm

Display Functions

(Sequence for resistivity function equals this conductivity example).

(See Hold menu Chapter 5.1)

cell constant

Temperature

compensation

Software release number

YES

S/cm

Reference temperature

DISP.1

DISP.2

compensated

value

S/cm

w/w %

(See Calibration menu Chapter 6)

YES

ENT

HOLD FAIL

YES NO

ENT

NO MODEYES

MODE

MEASURE CAL DISPLAY HOLD

OUTPUT SET HOLD TEMP. SERVICE

YES

YES NO

S/cm

Current output 1

Press YES to fix

the selected second

line of display

S/cm

YES NO

Uncompensated if USP is enabled in

serv code 57

DISP.1

Actual

4-5. Display functions

Sequence for resistivity function is similar to this conductivity example.

Operation 4-3

IM 12D7B3-E-H

Parameter setting 5-1

5. PARAMETER SETTING

5-1. Maintenance mode

5-1-1. Introduction

Standard operation of the EXA instrument involves use of the Maintenance (or operating) mode to set up some of the parameters.

Access to the maintenance mode is available via the six keys that can be pressed through the flexible window in the instrument front cover. Press the “MODE” key once to enter this dialog mode. (Note that at this stage the user will be prompted for a passcode where this has been previously set up in service code 52, section 5)

Calibrate : See “calibration” section 6. Display setting : See “operation” section 4. Hold : Manually switch on/off “hold” (when enabled in commissioning menu). See adjustment

procedure 5-2-3.

5-1-2. Manual activation of Hold

IM 12D7B3-E-H

ENT

FAIL

NO MODEYES

MODE

MEASURE

OUTPUT SET HOLD TEMP. SERVICE

MΩ.cm

HOLD

YES NO

MΩ.cm

CALIBRATE

MΩ.cm

MEASURE

MΩ.cm

NO NO

YES

MODE

YES

HOLD

YES NO YES NO

YES N O

IM 12D7B3-E-HIM 12D7B3-E-H

5-2 Parameter setting

5-2. Commissioning mode

5-2-1. Introduction

In order to obtain peak performance from the EXA SC202, you must set it up for each custom application.

Output ranges : mA output is set as default to 0-1 mS/cm or 0-19.99 MΩ.cm.

For enhanced resolution in more stable measuring processes, it may be desirable to select for example 5-10 µS/cm range.

Hold : The EXA SC202 transmitter has the ability to “HOLD” the output during maintenance peri-

ods. This parameter should be set up to hold the last measured value, or a fixed value to suit the process.

Temp1/2 : First and second temperature compensation types and values. (see also section 5-2-4)

* NaCl is the default compensation and is used for neutral salt solutions. Strong solutions of salts are compensated, as are process waters and pure, and ultrapure water. * TC temperature coefficient compensation uses a linear temperature compensation factor. This can be set by calibration or configuration. * Matrix compensation is an extremely effective way of compensation. Choose from standard matrix tables, or configure your own to exactly suit your process.

Service : This selection provides access to the service menu.

What follows are pictorial descriptions of typical frontplate pushbutton sequences for each parameter setting function. By following the simple YES/NO prompts and arrow keys, users can navigate through the process of setting range, hold and service functions.

IM 12D7B3-E-HIM 12D7B3-E-H

5-2-2. Range

ENT

NO MODEYES

MODE

MEASURE CAL DISPLAY HOLD

OUTPUT SET

HOLD TEMP. SERVICE

ENT

YES

YES NO

ENT

Parameter setting 5-3

IM 12D7B3-E-HIM 12D7B3-E-H

5-4 Parameter setting

5-2-3. HOLD

HOLD active last measured value.

YES NO

YES N O

YES

YES NO

YES N O

HOLD

YES

HOLD

OUTPUT SET HOLD TEMP. SERVICE

MODE

MEASURE CAL DISPLAY HOLD

HOLD

ENT

Set HOLD "fixed value"

YES

HOLD

ENT

HOLD

ENT

YES

IM 12D7B3-E-HIM 12D7B3-E-H

Parameter setting 5-5

5-2-4. Temperature compensation

1. Why temperature compensation?

The conductivity of a solution is very dependent on temperature. Typically for every 1 °C change in temperature the solution conductivity will change by approximately 2 %. The effect of temperature varies from one solution to another and is determined by several factors like solution composition, concentration and temperature range. A coefficient () is introduced to express the amount of temperature influence in % change in conductivity/°C. In almost all applications this temperature influence must be compensated before the conductivity reading can be interpreted as an accurate measure of concentration or purity.

Table 5-1. NaCl-compensation according to IEC 746-3 with T

ref

= 25 °C

2. Standard temperature compensation

From the factory the EXA is calibrated with a general temperature compensation function based on a sodium chloride salt solution. This is suitable for many applications and is compatible with the compensation functions of typical laboratory or portable instruments.

A temperature compensation factor is derived from the following equation:

=

- K

ref

100

T - T

ref

In which:  = Temperature compensation factor

(in %/ °C) T = Measured temperature (°C) Kt= Conductivity at T T

ref

= Reference temperature (°C)

ref

= Conductivity at T

ref

3. Manual temperature compensation

If the standard compensation function is found to be inaccurate for the sample to be measured, the transmitter can be set manually for a linear factor on site to match the application. The procedure is as follows:

1. Take a representative sample of the process liquid to be measured.

2. Heat or cool this sample to the reference temperature of the transmitter (usually 25 °C).

3. Measure the conductivity of the sample with the EXA and note the value.

4. Bring the sample to the typical process temperature (to be measured with the EXA).

5. Adjust the display indication to the noted value at the reference temperature.

6. Check that the temperature compensation factor has been changed.

7. Insert the conductivity cell into the process again.

4. Other possibilities (section 5-4)

1. Enter calculated coefficient.

2. Enter matrix temperature compensation.

TKt  TKt TKt

0 0.54 1.8 60 1.76 2.2 130 3.34 2.2

10 0.72 1.9 70 1.99 2.2 140 3.56 2.2

20 0.90 2.0 80 2.22 2.2 150 3.79 2.2

25 1.0 --- 90 2.45 2.2 160 4.03 2.2

30 1.10 2.0 100 2.68 2.2 170 4.23 2.2

40 1.31 2.0 110 2.90 2.2 180 4.42 2.2

50 1.53 2.1 120 3.12 2.2 190 4.61 2.2

200 4.78 2.2

YES NO

YES N O

TEMP.1

TEMP.2

After briefly displaying *WAIT* it will be possible to adjust the display reading to the correct value using > ENT keys.

S/cm

ENT

Briefly

*WAIT*

MODE

MEASURE CAL DISPLAY HOLD

OUTPUT SET HOLD TEMP. SERVICE

ENT

YES

YES N O

YES

YES N O

YES NO

YES N O

IM 12D7B3-E-HIM 12D7B3-E-H

5-6 Parameter setting

5-2-5. Temperature compensation selection

IM 12D7B3-E-HIM 12D7B3-E-H

Parameter setting 5-7

5-2-6. Service code

The figure below shows a typical button sequence to change a setting within the service menu. The specific settings are listed in numerical sequence on the following pages. On the page facing the setting tables are concise explanations of the purpose of the service codes.

Example: Service Code 01

Select main parameter

for SC

for RES

With the >, ,ENT keys

ENT

After changing the parameter, the instrument first goes into reset to load the parameter specific default values.

MODE

MEASURE CAL DISPLAY HOLD

OUTPUT SET HOLD TEMP. SERVICE

YES

ENT

YES NO

YES N O

YES NO

IM 12D7B3-E-H

5-3. Service Codes

5-3-1. Parameter specific functions

Code 1 SC/RES Choose the required parameter, either conductivity or resistivity. If the parameter

is changed the instrument will go into reset to load parameter specific default values, followed by starting measurement. For all other service codes the instrument will return to commissioning mode after the service code setting is finished.

Code 2 4.ELEC Choose the required sensor type. Normally conductivity and/or resistivity mea-

surements are done with 2-electrode type sensors. At high conductivity ranges, polarization of the electrodes may cause an error in conductivity measurement. For this reason 4-electrode type sensors may be necessary.

Code 3 0.10xC Enter the factory calibrated cellconstant mentioned on the textplate or on the

fixed cable. This avoids the need for calibration. Any value between 0.008 and

50.0 /cm may be entered. The position of the decimal point may be changed according the visual description in the right-handed page of section 5-2-2.

*NOTE: If the actual cell constant is changed after a calibration or if the entered cell constant differs from previous value, then the message “RESET?” will appear on the second line display. After pressing “YES” the entered value becomes the new nominal and calibrated cell constant. After pressing “NO” the update procedure of the cell constant entry is canceled.

Code 4 AIR To avoid cable influences on the measurement, a “zero” calibration with a dry

sensor may be done. If a connection box (BA10) and extension cable (WF10) are be used, “zero” calibration should be done including this connection equipment. When using a 4-electrode sensor additional connections are required temporarily Interconnect terminals 13 & 14 with each other and 15 & 16 with each other before making the adjustment. This is necessary to eliminate the capacitive influence of the cables. The links should be removed after this step is completed.

Code 5 POL.CK The EXA SC202 has a polarization check capable of monitoring the signal from

the cell for distortion from polarization errors. If there is a problem with the installation or the cell becomes fouled, this will trigger E1. For some application with very low conductivity and long cable runs, this error detection can cause false alarms during operation. Therefore this code offers the possibility to disable/enable this check.

5-8 Parameter setting

IM 12D7B3-E-H

Parameter setting 5-9

Code Display Function Function detail X Y Z Default values

Parameter specific functions

01 *SC.RES Select main parameter Conductivity 0 0 Cond.

Resistivity 1

02 *4-ELEC Select 2/4-EL system 2-Electrode measurement system 0 0 2-El.

4-Electrode measurement system 1

03 *0.10xC Set cell constant Press NO to step through choice of 0.100 cm

-1

multiplying factors on the second display.

0.10xC

1.00xC 0.10xC

10.0xC

100.xC

0.01xC

Press YES to select a factor

Use >, ^, ENT keys to adjust MAIN digits 1.000

04 *AIR Zero calibration Zero calibration with dry cell connected

*START Press YES to confirm selection

*”WAIT” Press YES to start, after briefly displaying

*END “WAIT”, *END will be displayed

Press YES to return to commissioning

mode

05 *POL.CK Polarization check Polarization check off 0 1 On

Polarization check on 1

06-09 Not used

IM 12D7B3-E-H

5-10 Parameter setting

5-3-2. Temperature measuring functions

Code 10 T.SENS Selection of the temperature compensation sensor. The default selection is the

Pt1000 Ohm sensor, which gives excellent precision with the two wire connections used. The other options give the flexibility to use a very wide range of other conductivity/resistivity sensors.

Code 11 T.UNIT Celsius or Fahrenheit temperature scales can be selected to suit user preference.

Code 12 T.ADJ With the process temperature sensor at a stable known temperature, the

temperature reading is adjusted in the main display to correspond. The calibration is a zero adjustment to allow for the cable resistance, which will obviously vary with length. The normal method is to immerse the sensor in a vessel with water in it, measure the temperature with an accurate thermometer, and adjust the reading for agreement.

IM 12D7B3-E-H

Parameter setting 5-11

Code Display Function Function detail X Y Z Default values

Temperature measuring functions

10 *T.SENS Temperature sensor Pt1000 0 0 Pt1000

Ni100 1

Pb36 2

Pt100 3

8k55 4

11 *T.UNIT Display in °C or °F °C 0 0 °C

°F 1

12 *T.ADJ Calibrate temperature Adjust reading to allow for cable None

resistance.

Use >, ^ , ENT keys to adjust value

13-19 Not used

IM 12D7B3-E-H

5-12 Parameter setting

5-4. Temperature compensation functions

Code 20 T.R.°C Choose a temperature to which the measured conductivity (or resistivity) value

must be compensated. Normally 25°C is used, therefore this temperature is chosen as default value. Limitations for this setting are: 0 to 100 °C. If T.UNIT in code 11 is set to °F, default value is 77°F and the limitations are 32 - 212°F.

Code 21 T.C.1/T.C.2 In addition to the procedure described in section 5-2-4 it is possible to adjust the

compensation factor directly. If the compensation factor of the sample liquid is known from laboratory experiments or has been previously determined, it can be introduced here. Adjust the value between 0.00 to 3.50 % per °C. In combination with reference temperature setting in code 20 a linear compensation function is obtained, suitable for all kinds of chemical solutions.

Code 22 MATRX The EXA is equipped with a matrix type algorithm for accurate temperature com-

pensation in various applications. Select the range as close as possible to the actual temperature/concentration range. The EXA will compensate by interpolation and extrapolation. Consequently, there is no need for a 100% coverage. If 9 is selected the temperature compensation range for the adjustable matrix must be configured in code 23. Next the specific conductivity values at the different temperatures must be entered in codes 24 to 28.

Code 23 T1, T2, T3, Set the matrix compensation range. It is not necessary to enter equal

T4 & T5 °C temperature steps, but the values should increase from T1 to T5, otherwise the

entrance will be refused. Example: 0, 10, 30, 60 and 100 °C are valid values for

the T1....T5. The minimum span for the range (T5 - T1) is 25 °C.

Code 24-28 L1xT1 - In these access codes the specific conductivity values can be entered for

L5xT5 5 different concentrations of the process liquid; each one in one specific access

code (24 to 28). The table below shows a matrix entering example for 1 - 15% NaOH solution for a temperature range from 0 - 100 °C.

NOTES:

1. In chapter 11 a table is included to record your programmed values. It will make programming easy for duplicate systems or in case of data loss.

2. Each matrix column has to increase in conductivity value.

3. Error code E4 occurs when two standard solutions have identical conductivity values at the same temperature within the temperature range.

Table 5-2. Example of user adjustable matrix

Matrix Example Example Example Example Example

Code 23 Temperature T1...T5 0 °C 25 °C 50 °C 75 °C 100 °C

Code 24 Solution 1 (1%) L1 31 mS/cm 53 mS/cm 76 mS/cm 98 mS/cm 119 mS/cm

Code 25 Solution 2 (3%) L2 86 mS/cm 145 mS/cm 207 mS/cm 264 mS/cm 318 mS/cm

Code 26 Solution 3 (6%) L3 146 mS/cm 256 mS/cm 368 mS/cm 473 mS/cm 575 mS/cm

Code 27 Solution 4 (10%) L4 195 mS/cm 359 mS/cm 528 mS/cm 692 mS/cm 847 mS/cm

Code 28 Solution 5 (15%) L5 215 mS/cm 412 mS/cm 647 mS/cm 897 mS/cm 1134 mS/cm

IM 12D7B3-E-H

Parameter setting 5-13

Code Display Function Function detail X Y Z Default values

Temperature compensation functions

20 *T.R.°C Set reference temp. Use >, ^, ENT keys to set value 25 °C

21 *T.C.1 Set temp. coef. 1 Adjust compensation factor 2.1 %

if set to TC in section 5-2-5. per °C

Set value with >, ^, ENT keys

*T.C.2 Set temp. coef. 2 Adjust compensation factor 2.1 %

if set to TC in section 5-2-5. per °C

Set value with >, ^, ENT keys

22 *MATRX Select matrix Choose matrix if set to matrix comp.

in section 5-2-5, using >, ^, ENT keys

HCl (cation) pure water (0-80 °C) 1 1 HCI

Ammonia pure water (0-80 °C) 2

Morpholine pure water (0-80 °C) 3

HCl (0-5 %, 0-60 °C) 4

NaOH (0-5 %, 0-100 °C) 5

User programmable matrix 9

23 *T1 °C (°F) Set temp. range Enter 1st (lowest) matrix temp. value

*T2.. Enter 2nd matrix temp. value

*T3.. Enter 3rd matrix temp. value

*T4.. Enter 4th matrix temp. value

*T5.. Enter 5th (highest) matrix temp. value

24 *L1xT1 Enter conductivity Value for T1

*L1xT2 values for lowest Value for T2

.... concentration

*L1xT5 Value for T5

25 *L2xT1 Concentration 2 Similar to code 24

26 *L3xT1 Concentration 3 Similar to code 24

27 *L4xT1 Concentration 4 Similar to code 24

28 *L5xT1 Concentration 5 Similar to code 24

29 Not used

IM 12D7B3-E-H

5-14 Parameter setting

5-5. mA output functions

Code 31 OUTP.F For the SC202 the output may be chosen as linear to input, or configured in a 21

point table to a particular linearization. Enable the table setup in code 31, and configure the table in code 35.

Code 32 BURN Diagnostic error messages can signal a problem by sending the output signals

upscale or downscale (22 mA or 3.9 mA). This is called upscale or downscale burnout, from the analogy with thermocouple failure signaling of a burned-out or open circuit sensor. The pulse burnout setting gives a 22 mA signal for the first 30 seconds of an alarm condition. After the “pulse” the signal returns to normal. This allows a latching alarm unit to record the error. In the case of the EXA the diagnostics are extensive and cover the whole range of possible sensor faults.

Code 35 TABLE The table function allows the configuration of an output curve by 21 steps

(intervals of 5%). The following example shows how the table may be configured to linearize the output with a mA curve.

Code 4-20 % H

2SO4

mS/cm Default

Output mA Service Service mS/cm

code 55 code 35

0 4.0 0.00 0 0

5 4.8 1.25 60 50 10 5.6 2.50 113 100 15 6.4 3.75 180 150 20 7.2 5.00 218 200 25 8.0 6.25 290 250 30 8.8 7.50 335 300 35 9.6 8.75 383 350 40 10.4 10.00 424 400 45 11.2 11.25 466 450 50 12.0 12.50 515 500 55 12.8 13.75 555 550 60 13.6 15.00 590 600 65 14.4 16.25 625 650 70 15.2 17.50 655 700 75 16.0 18.75 685 750 80 16.8 20.00 718 800 85 17.6 21.25 735 850 90 18.4 22.50 755 900 95 19.2 23.75 775 950

100 20.0 25.00 791 1000

1,000

800

600

400

200

CONDUCTIVITY (S/cm)

CONCENTRATION (%)

100 80 60 40 20 0

Output in %

100 80 60 40 20 0

Output in %

Fig. 5-1. Linearization of output

Example: 0-25% Sulfuric acid

Table 5-3.

Concentration Output function is done in de following order:

• Set OUTP.F. (Service Code 31) to table

• Set the Concentration range in % (Service Code 55)

• Set table values (%output and Conductivity values) in TABLE (Service Code 35)

IM 12D7B3-E-H

Parameter setting 5-15

Code Display Function Function detail X Y Z Default values

mA Outputs

30 Not used

31 *OUTP.F mA output functions Linear 0 0 Linear

Table 1

32 *BURN Burn function No burnout 0 0 No Burn.

Burnout downscale 1

Burnout upscale 2

Pulse burnout 3

33, 34 Not used

35 *TABLE Output table for mA

*0% Linearization table for mA in 5% steps.

*5% The measured value is set in the main

*10% display using the >, ^, ENT keys, for

... each of the 5% interval steps.

... Where a value is not known, that value may

*95% be skipped, and a linear interpolation will

*100% take place.

36-39 Not used

IM 12D7B3-E-H

5-6. User interface

Code 50 *RET. When Auto return is enabled, the transmitter reverts to the measuring mode from

anywhere in the configuration menus, when no button is pressed during the set time interval of 10 minutes.

Code 52 *PASS Passcodes can be set on any or all of the access levels, to restrict access to the

instrument configuration.

Code 53 *Err01 Error message configuration. Two different types of failure mode can be set.

Hard fail gives a steady FAIL flag in the display. A fail signal is transmitted on the mA output when enabled in code 32.

Soft fail gives a flashing FAIL flag in the display. A good example is the dry sensor for a soft fail.

Code 54 *E5.LIM Limits can be set for shorted and open measurement. Dependent on the main

& *E6.LIM parameter chosen in code 01, the EXA will ask for a resistivity or conductivity

value to be set (value to be set is the uncompensated conductivity/resistivity value).

Code 55 *% For some applications the measured parameter values may be (more or less) lin-

ear to concentration. For such applications it is not needed to enter an output table, but 0 and 100% concentration values directly can be set.

Code 56 *DISP The display resolution is default set to autoranging for conductivity reading. If a

fixed display reading is needed, a choice can be made out of 7 possibilities. For

resistivity the default reading is fixed to xx.xx MΩ.cm.

Code 57 *USP Automatic checking for compliance with the water purity standard set in USP

(United States Pharmacopeia). For more detailed description see chapter 9.

5-16 Service coded settings

IM 12D7B3-E-H

Parameter setting 5-17

Code Display Function Function detail X Y Z Default values

User interface

50 *RET Auto return Auto return to measuring mode Off 0

Auto return to measuring mode On 1 1 On

51 Not used

52 *PASS Passcode Maintenance passcode Off 0 0.0.0 Off

Note # = 0 - 9, where Maintenance passcode On #

Commissioning passcode Off 0 Off

1=111, 2=333, 3=777 Commissioning passcode On #

4=888, 5=123, 6=957 Service passcode Off 0 Off

7=331, 8=546, 9=847 Service passcode On #

53 *Err.01 Error setting Polarization too high Soft/Hard 0/1 1 Hard

*Err.05 Shorted measurement Soft/Hard 0/1 1 Hard

*Err.06 Open measurement Soft/Hard 0/1 1 Hard

*Err.07 Temperature sensor open Soft/Hard 0/1 1 Hard

*Err.08 Temp. sensor shorted Soft/Hard 0/1 1 Hard

*Err.13. USP limit exceeded Soft/Hard 0/1 0 Soft

54 *E5.LIM E5 limit setting Maximum conductivity value 250 mS

(Minimum resistivity value) 0.004 kΩ

*E6.LIM E6 limit setting Minimum conductivity value 1.000 µS

(Maximum resistivity value) 1.000 MΩ

55 *% Display mA in w/w% mA-range displayed in w/w% off 0 Off

mA-range displayed in w/w% on 1

*0% Set 0% output value in w/w%

*100% Set 100% output value in w/w%

56 *DISP Display resolution Auto ranging display 0 0 Auto

Display fixed to X.XXX µS/cm or MΩ.cm 1 Display fixed to XX.XX µS/cm or MΩ.cm 2 (2) Display fixed to XXX.X µS/cm or MΩ.cm 3 Display fixed to X.XXX mS/cm or kΩ.cm 4 Display fixed to XX.XX mS/cm or kΩ.cm 5 Display fixed to XXX.X mS/cm or kΩ.cm 6 Display fixed to XXXX mS/cm or kΩ.cm 7

57 *USP USP setting Disable the E13 (USP limit exceeded) 0 0 Off

Enable the E13 (USP limit exceeded) 1

58-59 Not used

IM 12D7B3-E-H

5-18 Parameter setting

5-7. Communication setup

Code 60 *COMM. The settings should be adjusted to suit the communicating device connected to

the output. The communication can be set to HART or to PH201*B distributor (for Japanese market only).

*ADDR. Select address 00 for point to point communication with 4-20mA transmission.

Addresses 01 to 15 are used in multi-drop configuration (fixed 4mA output).

Code 61 *HOUR The clock/calendar for the logbook is set for current date and time as reference.

*MINUT *SECND *YEAR *MONTH *DAY

Code 62 *ERASE Erase logbook function to clear the recorded data for a fresh start. This may be

desirable when re-commissioning an instrument that has been out of service for a while.

5-8. General

Code 70 *LOAD The load defaults code allows the instrument to be returned to the default set up

with a single operation. This can be useful when wanting to change from one application to another.

5-9. Test and setup mode

Code 80 *TEST The test mode is used to confirm the instrument setup. It is based on the factory

setup procedure and can be used to check the QIC (factory generated Certificate). This test is described in the Quality Inspection Standard, see chapter 12.

NOTE : Attempting to change data in service code, 80 and above without the proper instructions

and equipment, can result in corruption of the instrument setup, and will impair the performance of the unit.

IM 12D7B3-E-H

Parameter setting 5-19

Code Display Function Function detail X Y Z Default values

Communication

60 *COMM. Communication Set communication Off 0 1.0 On

Set communication On 1

Set communication PH201*B On 2

Communication write enable 0 Write

Communication write protect 1 enable

*ADDR. Network address Set address 00 to 15 00

61 *HOUR Clock setup Adjust to current date and time using

*MINUT >, ^ and ENT keys

*SECND

*YEAR

*MONTH

*DAY

62 *ERASE Erase logbook Press YES to clear logbook data

63-69 Not used

Code Display Function Function detail X Y Z Default values

General

70 *LOAD Load defaults Reset configuration to default values

71-79 Not used

Code Display Function Function detail X Y Z Default values

Test and setup mode

80 *TEST Test and setup Built in test functions as detailed in QIS

and Service Manual

IM 12D7B3-E-H

Calibration 6-1

6. CALIBRATION

6-1 When is calibration necessary?

Calibration of conductivity/resistivity instruments is normally not required, since Yokogawa delivers a wide range of sensors, which are factory calibrated traceable to NIST standards. The cell constant values are normally indicated on the top of the sensor or on the integral cable. These values can be entered directly in service code 03 (section 5-3-1). If the cell has been subjected to abrasion (erosion or coating) calibration may be necessary. In the next section two examples are given. Alternatively calibration may be carried out with a simulator to check the electronics only.

NOTE: During calibration the temperature compensation is still active. This means that the readings are referred to the reference temperature as chosen in service code 20 (section 5-3-4, default 25 °C). Calibration is normally carried out by measuring a solution with a known conductivity value at a known temperature. The measured value is adjusted in the calibration mode. On the next pages the handling sequence for this action is visualized. Calibration solutions can be made up in a laboratory. An amount of salt is dissolved in water to give a precise concentration with the temperature stabilized to the adjusted reference temperature of the instrument (default 25 °C). The conductivity of the solution is taken from literature tables or the table on this page.

Alternatively the instrument may be calibrated in an unspecified solution against a standard instrument. Care should be taken to make a measurement at the reference temperature since differences in the type of temperature compensation of the instrument may cause an error.

NOTE: The standard instrument used as a reference must be accurate and based on an identical temperature compensation algorithm. Therefore the Model SC82 Personal Conductivity Meter of Yokogawa is recommended.

Typical calibration solutions. The table shows some typical conductivity values for sodium-chloride (NaCl) solutions which can be made up in a laboratory.

Table 6-1. NaCl values at 25 °C

Weight % mg/kg Conductivity

0.001 10 21.4 µS/cm

0.003 30 64.0 µS/cm

0.005 50 106 µS/cm

0.01 100 210 µS/cm

0.03 300 617 µS/cm

0.05 500 1.03 mS/cm

0.1 1000 1.99 mS/cm

0.3 3000 5.69 mS/cm

0.5 5000 9.48 mS/cm

1 10000 17.6 mS/cm

3 30000 48.6 mS/cm

5 50000 81.0 mS/cm

10 100000 140 mS/cm

NOTE: For resistivity measurement the standard resistivity units of the calibration solution can be calculated as follows:

R = 1000/G (kΩ.cm if G = µS/cm)

Example:

0.001% weight

R = 1000/21.4 = 46.7 kΩ.cm

IM 12D7B3-E-H

6-2 Calibration

6-2. Calibration procedure

ENT

Select the flashing digit with the > key. Increase its value by pressing the key

Set the value using the >, , ENT key.

Put the sensor in standard solution. Press YES.

When the correct value is displayed, press ENT to enter the change.

After briefing displaying WAIT, the CAL.END message appears.

The calibration is now complete. Put the sensor back in the process and press YES.

NOYES

MODE

NOYES

YES

ENT

NO MODEYES

MODE

MEASURE

DISPLAY

CAL HOLD

Press the MODE key.

The legend CALIB

appears, and the YES/NO

key prompt flags flash.

ENT

The cell constant is automatically updated after the calibration and the new value can be read on the display as described in section 4.5.

The calculation is as follows: Cell constant in /cm= (Conductivity of calibration solution in mS/cm) x (Cell resistance in kOhm)

Comparing this calibrated cell constant with the initial nominal cell constant in service code 03 gives a good indication of the stability of the sensor. If the calibrated cell constant differs more than 20% from the nominal cell constant error E3 is displayed.

IM 12D7B3-E-H

Calibration 6-3

6-3. Calibration with HOLD active

HOLD

ENT

Select the flashing digit with the > key. Increase its value by pressing the key

Set the value using the >, , ENT key.

Put the sensor in standard solution. Press YES.

When the correct value is displayed, press ENT to enter the change.

After briefing displaying WAIT, the CAL.END message appears.

The calibration is now complete. Put the sensor back in the process and press YES.

HOLD will be displayed. Press NO to turn off HOLD and return to the measuring mode.

NOYES

HOLD

MODE

NOYES

YES

HOLD

ENT

NO MODEYES

MODE

MEASURE CAL

DISPLAY

HOLD

Press the MODE key.

The legend CALIB

appears, and the YES/NO

key prompt flags flash.

HOLD

ENT

HOLD

IM 12D7B3-E-H

7. MAINTENANCE

7-1. Periodic maintenance for the EXA 202 transmitter

The EXA transmitter requires very little periodic maintenance. The housing is sealed to IP65 (NEMA 4X) standards, and remains closed in normal operation. Users are required only to make sure the front window is kept clean in order to permit a clear view of the display and allow proper operation of the pushbuttons. If the window becomes soiled, clean it using a soft damp cloth or soft tissue. To deal with more stubborn stains, a neutral detergent may be used.

NOTE: Never used harsh chemicals or solvents. In the event that the window becomes heavily stained or scratched, refer to the parts list (Chapter 10) for replacement part numbers.

When you must open the front cover and/or glands, make sure that the seals are clean and correctly fitted when the unit is reassembled in order to maintain the housing’s weatherproof integrity against water and water vapour. The measurement otherwise may be prone to problems caused by exposure of the circuitry to condensation (see page 10-1).

The EXA instrument contains a lithium cell to support the clock function when the power is switched off. This cell needs to be replaced at 5 yearly intervals (or when discharged). Contact your nearest Yokogawa service centre for spare parts and instructions.

7-2. Periodic maintenance of the sensor

NOTE: Maintenance advice listed here is intentionally general in nature. Sensor maintenance is highly application specific.

In general conductivity/resistivity measurements do not need much periodic maintenance. If the EXA indicates an error in the measurement or in the calibration, some action may be needed (ref. chapter 8 troubleshooting). In case the sensor has become fouled an insulating layer may be formed on the surface of the electrodes and consequently, an apparent increase in cell constant may occur, giving a measuring error. This error is:

2 x x 100 %

where: Rv = the resistance of the fouling layer Rcel = the cell resistance

NOTE: Resistance due to fouling or to polarization does not effect the accuracy and operation of a 4-electrode conductivity measuring system. If an apparent increase in cell constant occurs cleaning the cell will restore accurate measurement.

Cleaning methods

1. For normal applications hot water with domestic washing-up liquid added will be effective.

2. For lime, hydroxides, etc., a 5 ...10% solution of hydrochloric acid is recommended.

3. Organic foulings (oils, fats, etc.) can be easily removed with acetone.

4. For algae, bacteria or moulds, use a solution of domestic bleach (hypochlorite).

* Never use hydrochloric acid and bleaching liquid simultaneously. The very poisonous chlorine gas will

result.

Maintenance 7-1

Rcel

IM 12D7B3-E-H

Troubleshooting 8-1

8. TROUBLESHOOTING

The EXA SC202 is a microprocessor-based analyzer that performs continuous self-diagnostics to verify that it is working correctly. Error messages resulting from faults in the microprocessor systems itself are few. Incorrect programming by the user can be corrected according to the limits set in the following text.

In addition, the EXA SC202 also checks the sensor to establish whether it is still functioning within specified limits.

What follows is a brief outline of some of the EXA SC202 troubleshooting procedures, followed by a detailed table of error codes with possible causes and remedies.

8-1. Diagnostics

8-1-1. Off-line checks

The EXA SC202 transmitter incorporates a diagnostic check of the adjusted cell constant value at calibration. If the adjusted value stays within 80 - 120 % of the nominal value set in service code 03, it is accepted. Otherwise, the unit generates an error (E3). With a HART communication package it is possible to scroll the calibration data in a logbook function.

The EXA also checks the temperature compensation factor while performing manual temperature compensation as described in section 5.2.5. If the TC factor stays within 0.00% to 3.50% per °C, it is accepted. Otherwise, E2 will be displayed.

8-1-2. On-line checks

The EXA performs several on-line checks to optimize the measurement and to indicate a fault due to the fouling or polarization of the connected sensor. The fault will be indicated by the activation of the FAIL flag in the display.

During measurement the EXA adjusts the measuring frequency to give the best conditions for the actual value being measured. At low conductivity there is a risk of error due to the capacitive effects of the cable and the cell. These are reduced by using a low measuring frequency. At high conductivity the capacitive effects become negligible and errors are more likely to be caused by polarization or fouling of the cell. These errors are decreased by increasing the measuring frequency.

At all values the EXA checks the signal from the cell to search for distortion which is typical of capacitive or polarization errors. If the difference between pulse front and pulse rear is > 20% an error E1 will be displayed and the FAIL flag in the display is activated. In service code 05 it is possible to turn this check on and off.

IM 12D7B3-E-H

8-2 Troubleshooting

The following error message table gives a list of possible problems that can be indicated by the EXA.

Table 8-1. Error Codes

Code Error description Possible cause Suggested remedy

E1 Polarization detected on cell Sensor surface fouled Clean sensor and calibrate

Conductivity too high Replace sensor

E2 Temperature coefficient out of limits Incorrect field calibration of TC Re-adjust

(0-3.5%/ºC) Set calculated TC

E3 Calibration out of limits Calibrated value differs more than Check for correct sensor

+/- 20 % of nominal value programmed Check for correct unit (µS/cm, in code 03. mS/cm, kΩ.cm or MΩ.cm)

Repeat calibration

E4 Matrix compensation error Wrong data entered in 5x5 matrix Re-program

E5 Conductivity too high or resistivity too low Incorrect wiring Check wiring (3-5)

(Limits set in service code 54) Internal leakage of sensor Replace sensor

Defective cable Replace cable

E6 Conductivity too low or resistivity too high Dry sensor Immerse sensor

(Limits set in service code 54) Incorrect wiring Check wiring (3-5)

Defective cable Replace cable

E7 Temperature sensor open Process temperature too high or too low Check process

(Pt1000 : T > 250°C or 500°F) Wrong sensor programmed Check model code sensor

(Pt100/Ni100 : T > 200°C or 400°F) Incorrect wiring Check connections and cable

(8k55 : T < -10°C or 10°F)

(PB36 : T < -20°C or 0°F)

E8 Temperature sensor shorted Process temperature too high or too low Check process

(Pt1000/Pt100/Ni100 : T < -20°C or 0°F) Wrong sensor programmed Check model code sensor

(8k55/PB36 : T > 120°C or 250°F) Incorrect wiring Check connections and cable

E9 Air set impossible Too high zero due to cable capacitance Replace cable

E10 EEPROM write failure Fault in electronics Try again, if unsuccessful contact

Yokogawa

E13 USP limit exceeded Poor water quality Check ion exchangers

E15 Cable resistance influence to temperature Cable resistance too high Check cable

exceeds +/- 15°C Corroded contacts Clean and reterminate

Wrong sensor programmed Reprogram

E17 Output span too small Incorrect configuration by user Reprogram

E18 Table values make no sense Wrong data programmed Reprogram

E19 Programmed values outside acceptable limits Incorrect configuration by user Reprogram

E20 All programmed data lost Fault in electronics Contact Yokogawa

Very severe interference

E21 Checksum error Software problem Contact Yokogawa

IM 12D7B3-E-H

USP 9-1

9. USP WATER PURITY MONITORING

9-1. What is USP ?

USP stands for United States Pharmacopeia and it is responsible for issuing guidelines for the pharmaceutical industry. Implementing these guidelines is highly recommended for companies wishing to market drugs in the US. This means that USP is important for pharmaceutical companies worldwide. USP recently issued:

- USP - recommendations for conductivity measurement. This new USP, aims at the replacement of 5 antiquated laboratory tests by simple conductivity analysis.

9-2. What is conductivity measurement according to USP?

Life would be easy, if the limits for the conductivity of injection water were set to be 1.3 µS/cm at a reference temperature of 25°C. However, the committee (PHRMA WQC) who made the USP recommendations, could not agree on a simple Sodium Chloride model for water quality determination. Instead, they chose a Chloride-Ammonia conductivity-pH model in water atmospherically equilibrated (CO2) at 25 °C.

The objective of the WQC was to find an easy way to establish the water quality, so on-line analysis at process temperature was a necessary requirement. However, if it is not possible to choose one temperature response model to work to, then it is also not possible to choose one temperature compensation algorithm.

We as a manufacturer of analytical equipment do not want to go into the details of whether the limiting conductivity values for water quality are based on the Chloride model or the Ammonia model. Our job is to develop on-line analyzers that make it simple for our customers to meet the water quality that is specified as “stage 1: Conductivity Limit as a Function of Temperature.”

If the water exceeds the limits of stage 1, then it can still be acceptable, but requires the customer to proceed to Stage 2, and possibly Stage 3, to validate the water quality. It is our objective to assure that our customers do not exceed the limits in stage 1 to avoid them having to carry out the complicated laboratory checks in Stages 2 and 3.

9-3. USP in the SC202

1. In SC202 we have defined an Error Code: E13. This is independent of what range the customer is mea-

suring or what temperature compensation method he is using for water quality monitoring. When the display shows E13, then the water quality exceeds the USP limits, and the FAIL flag on the display is activated to signal that the system needs urgent attention.

2. We have introduced uncompensated conductivity in the DISPLAY menu. In the LCD display the user can

read the temperature and the raw conductivity to compare his water quality with the USP table.

3. We have kept all the EXA functionality: It is even possible to have the mA Output and Display readings in

resistivity units. Most users will have very good water quality and in the resistivity mode they will have better resolution on the recorder or DCS. The readings are simply the reciprocal values of the conductivity values. In the example mentioned above the contact will close at an uncompensated resistivity of

1/1.76 µS/cm. = 0.568 MΩ.cm.

IM 12D7B3-E-H

9-2 USP

9-4. Setting up SC202 for USP

First enable USP in service code 57. Change the setting from 0 (default) to 1 (enabled).

This activates uncompensated conductivity in the display menu. The E13 feature is also enabled. For E13 the FAIL flag is triggered when the uncompensated conductivity exceeds the relevant value in the graph.

Conductivity limit as a

function of Temperature

Temperature in ºC

0 25 50 75 100

microSiemens/cm

3,5

2,5

1,5

0,5

Fig. 9-1.

IM 12D7B3-E-H

Spare parts 10-1

10. SPARE PARTS

Table 10-1. Itemized parts list

Item No. Description Part no.

1 Cover assembly including window, gasket and fixing screws K1542JZ

2 Window K1542JN

3a Internal works assembly (general purpose) K1544DJ

3b Internal works assembly (intrinsically safe) K1544DK

4 Digital (display) board K1544DB

5a Analogue (input) board (general purpose) K1544SK

5b Analogue (input) board (intrinsically safe) K1544SE

6 Ribbon cable K1544PH

7 EPROM K1544BJ

8 Lithium cell (battery) K1543AJ

9 Terminals (block of 3) K1544PF

10 Housing K1542JL

11 Gland set (one gland including seal and backing nut) K1500AU

12 Text plate (general purpose version only) K1544BC

Options

/U Pipe and wall mounting hardware K1542KW

/SCT Stainless steel tag plate K1544ST

/H Hood for sun protection K1542KG

5a(b)

3a (b)

Fig. 10-1. Exploded view

IM 12D7B3-E-H

Appendix 11-1

11. APPENDIX

11-1. User setting for non-linear output table (code 31and 35)

Output signal value

%mA

Output 4-20

000 00.4 005 04.8 010 05.6 015 06.4 020 07.2 025 00.8 030 08.8 035 09.6 040 10.4 045 11.2 050 0.12 055 12.8 060 13.6 065 14.4 070 15.2 075 0.16 080 16.8 085 17.6 090 18.4 095 19.2

100 20.0

11-2. User entered matrix data (code 23 to 28)

Medium: T1 data T2 data T3 data T4 data T5 data

Code 23 Temperature T1...T5

Code 24 Solution 1 L1

Code 25 Solution 2 L2

Code 26 Solution 3 L3

Code 27 Solution 4 L4

Code 28 Solution 5 L5

Medium: T1 data T2 data T3 data T4 data T5 data

Code 23 Temperature T1...T5

Code 24 Solution 1 L1

Code 25 Solution 2 L2

Code 26 Solution 3 L3

Code 27 Solution 4 L4

Code 28 Solution 5 L5

IM 12D7B3-E-H

11-2 Appendix

11-3. Matrix data table (user selectable in code 22)

Matrix, Solution Temp (°C) Data 1 Data 2 Data 3 Data 4 Data 5

HCL-p (cation) 0 ppb 4 ppb 10 ppb 20 ppb 100ppb

selection 1 0 0.0116 µS 0.0228 µS 0.0472 µS 0.0911µS 0.450 µS

10 0.0230 µS 0.0352 µS 0.0631 µS 0.116 µS 0.565 µS

20 0.0419 µS 0.0550 µS 0.0844 µS 0.145 µS 0.677 µS

30 0.0710 µS 0.085 µS 0.115 µS 0.179 µS 0.787 µS

40 0.1135 µS 0.129 µS 0.159 µS 0.225 µS 0.897 µS

50 0.173 µS 0.190 µS 0.220 µS 0.286 µS 1.008 µS

60 0.251 µS 0.271 µS 0.302 µS 0.366 µS 1.123 µS

70 0.350 µS 0.375 µS 0.406 µS 0.469 µS 1.244 µS

80 0.471 µS 0.502 µS 0.533 µS 0.595 µS 1.373 µS

Ammonia-p 0 ppb 2 ppb 5 ppb 10 ppb 50 ppb

selection 2 0 0.0116 µS 0.0229 µS 0.0502 µS 0.0966µS 0.423 µS

10 0.0230 µS 0.0337 µS 0.0651 µS 0.122 µS 0.535 µS

20 0.0419 µS 0.0512 µS 0.0842 µS 0.150 µS 0.648 µS

30 0.0710 µS 0.0788 µS 0.111 µS 0.181 µS 0.758 µS

40 0.113 µS 0.120 µS 0.149 µS 0.221 µS 0.866 µS

50 0.173 µS 0.178 µS 0.203 µS 0.273 µS 0.974 µS

60 0.251 µS 0.256 µS 0.278 µS 0.344 µS 1.090 µS

70 0.350 µS 0.356 µS 0.377 µS 0.439 µS 1.225 µS

80 0.471 µS 0.479 µS 0.501 µS 0.563 µS 1.393 µS

Morpholine-p 0 ppb 20 ppb 50 ppb 100 ppb 500 ppb

selection 3 0 0.0116 µS 0.0272 µS 0.0565 µS 0.0963µS 0.288 µS

10 0.0230 µS 0.0402 µS 0.0807 µS 0.139 µS 0.431 µS

20 0.0419 µS 0.0584 µS 0.108 µS 0.185 µS 0.592 µS

30 0.0710 µS 0.0851 µS 0.140 µS 0.235 µS 0.763 µS

40 0.113 µS 0.124 µS 0.181 µS 0.289 µS 0.938 µS

50 0.173 µS 0.181 µS 0.234 µS 0.351 µS 1.12 µS

60 0.251 µS 0.257 µS 0.306 µS 0.427 µS 1.31 µS

70 0.350 µS 0.357 µS 0.403 µS 0.526 µS 1.52 µS

80 0.471 µS 0.481 µS 0.528 µS 0.654 µS 1.77 µS

Hydrochloric Acid 1% 2% 3% 4% 5%

selection 4 0 65 mS 125 mS 179 mS 229 mS 273 mS

15 91 mS 173 mS 248 mS 317 mS 379 mS

30 114 mS 217 mS 313 mS 401 mS 477 mS

45 135 mS 260 mS 370 mS 474 mS 565 mS

60 159 mS 301 mS 430 mS 549 mS 666 mS

Sodium Hydroxide 1% 2% 3% 4% 5%

selection 5 0 31 mS 61 mS 86 mS 105 mS 127 mS

25 53 mS 101 mS 145 mS 185 mS 223 mS

50 76 mS 141 mS 207 mS 268 mS 319 mS

75 97.5 mS 182 mS 264 mS 339 mS 408 mS

100 119 mS 223 mS 318 mS 410 mS 495 mS

IM 12D7B3-E-H

Appendix 11-3

11-4. Sensor Selection

11-4-1. General

The inputs of the EXA transmitter are freely programmable for ease of installation. Standard 2-electrode type sensors with a cell constant of 0.100/cm and a Pt1000 temperature sensor, need no special programming. The EXA indicates a fault with a signal in the display field if there is a mismatch of sensors in the connection.

11-4-2. Sensor selection

The EXA SC202 is pre/programmed to accept standard 2-electrode sensors with a Pt1000 temperature sensor. The EXA is universally compatible with all 2- and 4-electrode type of sensors with a cell constant within the range of 0.008/cm to 50.0/cm.

11-4-3. Selecting a temperature sensor

The EXA SC202 reaches its highest accuracy when used with a Pt1000 temperature sensor. This may influence the choice of the conductivity/resistivity sensor, as in most cases the temperature sensor is integrated in the conductivity/resistivity sensor.

11-5. Setup for other functions

● Current Outputs

Transmission signals for the measured parameters can be set up in service codes 30-39.

● Diagnostic checks

Polarization check and checks on the calibrated cell constant and the adjusted Temperature Coefficient, are included in the EXA SC202.

● Communications

The proprietary HART communication link allows remote configuration and data retrieval through the PC202 communication package. This is an excellent tool for the maintenance engineer, quality engineer or plant manager. Service codes 60 - 69 are used to set up the communications.

● Logbook

In combination with the communications link, a “logbook” is available to keep an electronic record of events such as error messages, calibrations and programmed data changes. By reference to this log, users can for instance easily determine maintenance or replacement schedules.

Note: On the pages 11-4 & 11-5 a reference list for the configuration of the SC202 is shown.

IM 12D7B3-E-H

11-4 Appendix

11-6. User setting table

FUNCTION SETTING DEFAULTS USER SETTINGS

Parameter specific functions

01 *SC.RES 0 SC

02 *4-Elec 0 2-Elec.

03 *0.10xC 0.10xC Factor

1.000 /cm

04 *AIR

05 *POL.C.K 1 On

Temperature measuring functions

10 *T.SENS 0 Pt1000

11 *T.UNIT 0 °C

12 *T.ADJ None

Temperature compensation functions

20 *T.R.°C 25 °C

21 *T.C.1 2.1 %/°C

*T.C.2 2.1 %/°C

22 *MATRX None, see 5-2-5

23 *T1°C T. range See sep. table, 11-2

24 *L1xT1 Cond. C1 See sep. table, 11-2

25 *L2xT1 Cond. C2 See sep. table, 11-2

26 *L3xT1 Cond. C3 See sep. table, 11-2

27 *L4xT1 Cond. C4 See sep. table, 11-2

28 *L5xT1 Cond. C5 See sep. table, 11-2

mA outputs

31 *OUTP.F 0 Linear S.C.

32 *BURN 0 No Burn

35 *TABL1 21 pt table see code 31, 11-1

IM 12D7B3-E-H

Appendix 11-5

FUNCTION SETTING DEFAULTS USER SETTINGS

User Interface

50 *RET 1 on

52 *PASS 0.0.0 all off

53 *Err.01 1 hard fail

*Err.05 1 hard fail

*Err.06 1 hard fail

*Err.07 1 hard fail

*Err.08 1 hard fail

*Err.13 0 soft fail

54 *E5.LIM 250 mS

(0.004) kΩ.

*E6.LIM 1.000 µS

(1.0) MΩ.

55 *0 % 0 Off

100% 100.0

56 *DISP 0 Auto ranging (SC)

(2) (xx.xxMΩ.cm) (RES)

57 *USP 0 off

Communication

60 *COMM. 0.1 off/write prot.

*ADDR. 00 00

61 *HOUR

62 *ERASE

General

70 *LOAD

Test and setup mode

80 *TEST

IM 12D7B3-E-H

11-6 Appendix

11-7. Error codes

Code Error description Possible cause Suggested remedy

E1 Polarization detected on cell Sensor surface fouled Clean sensor

Conductivity too high Replace sensor

E2 Temperature coefficient out of limits Incorrect field calibration of TC Re-adjust

(0-3.5%/ºC) Set calculated TC

E3 Calibration out of limits Calibrated value differs more than Check for correct sensor

+/- 20 % of nominal value programmed Check for correct unit (µS/cm, in code 03. mS/cm, kΩ.cm or MΩ.cm)

Repeat calibration

E4 Matrix compensation error Wrong data entered in 5x5 matrix Re-program

E5 Conductivity too high or resistivity too low Incorrect wiring Check wiring (3-6)

(Limits set in service code 54) Internal leakage of sensor Replace sensor

Defective cable Replace cable

E6 Conductivity too low or resistivity too high Dry sensor Immerse sensor

(Limits set in service code 54) Incorrect wiring Check wiring (3-6)

Defective cable Replace cable

E7 Temperature sensor open Process temperature too high or too low Check process

(Pt1000 : T > 250°C or 500°F) Wrong sensor programmed Check model code sensor

(Pt100/Ni100 : T > 200°C or 400°F) Incorrect wiring Check connections and cable

(8k55 : T < -10°C or 10°F)

(PB36 : T < -20°C or 0°F)

E8 Temperature sensor shorted Process temperature too high or too low Check process

(Pt1000/Pt100/Ni100 : T < -20°C or 0°F) Wrong sensor programmed Check model code sensor

(8k55/PB36 : T > 120°C or 250°F) Incorrect wiring Check connections and cable

E9 Air set impossible Too high zero due to cable capacitance Replace cable

E10 EEPROM write failure Fault in electronics Try again, if unsuccessful contact

Yokogawa

E13 USP limit exceeded Poor water quality Check ion exchangers

E15 Cable resistance influence to temperature Cable resistance too high Check cable

exceeds +/- 15°C Corroded contacts Clean and reterminate

Wrong sensor programmed Reprogram

E17 Output span too small Incorrect configuration by user Reprogram

E18 Table values make no sense Wrong data programmed Reprogram

E19 Programmed values outside acceptable limits Incorrect configuration by user Reprogram

E20 All programmed data lost Fault in electronics Contact Yokogawa

Very severe interference

E21 Checksum error Software problem Contact Yokogawa

IM 12D7B3-E-H

11-8. Device Description (DD) menu structure

The Device Description (DD) is available from Yokogawa or the HART foundation. An example is shown below of the ON LINE menu structure. This manual makes no attempt to explain the operation of the Hand Held communicator (HHC). For detailed operating instructions, refer to the HHC user’s manual and the online help structure.

mA function Burn function

Error programming Display

Tag

Maintenance Commissioning Service

Event1...event64

Matrix temp. 1...5 Matrix1_1..5_5

Logbook

Process value Second process value Uncomp. process val. Weight percentage Temperature % of output range

Status

Hold

Device informat.

Param. Specific.

Temp. compens.

Model Manufacturer Distributor Tag Descriptor Message Date Device id Write protect Universal revision Transmitter revision Software revision Hardware revision Polling address Req.

preambles

Device setup

Primary value Analog output Lower rangeval. Upper rangeval.

Review

ON LINE MENU

Level 1 menu Level 2menu

Level 3 menu

Level4 menu Level 5 menu

Process variab.

Diag/Service

Basic Setup

Detailed

Setup

Date Descriptor Message Write protect Manufacture device id

Process unit 2 or 4 electrodes Nominal CC CC after calibration Polarization check

Temp.sensor Temp. unit

Reference temp Temp. compens.1 TC1 percentage Temp. Compens.2 TC2 percentage Matrix selection Matrix table

Error status Hold on/off Hold enable/disable Hold type Hold value

Logbook conf.

Logbook 1 Logbook

Temp. Specific.

Output function

User

Interface

Rec.1...50 Rec.1...50

mA-Table

Auto return E5 limit E6 limit Weight 0

Weight 100% Display format USP Passcode

Table 0%...100%

Error 1...Error 13

Appendix 11-7

IM 12D7B3-E-H

11-9. Field Change Order

11-9-1 Changes made by software release 1.1

• PH201 communication added for Japanese market

11-9-2 Changes made by software release 1.1

• E20 is cleared after the programmed data was recovered

11-9-3 Changes made by software release 2.1

• Communication is default set to enabled / write enabled

11-8 Appendix

Test Certificate 12-1

12.1 TEST CERTIFICATE

IM 12D7B3-E-H

Test EXA Series Certificate Model SC202

Inductive Conductivity Transmitter

1. Introduction

This inspection procedure applies to the model SC202 Conductivity transmitter. There is a serial number, unique to the instrument, which is stored in non-volatile memory. Each time the transmitter is powered up, the serial number is shown in the display. An example is shown below, for details see the Users manual:

Unique Number

Line Number ATE (automatic test equipment no.) Month code Year code

2. General Inspection

Final testing begins with a visual inspection of the unit to ensure that all the relevant parts are present and correctly fitted.

3. Safety Test

The (-) minus and the external ground terminal of the housing are connected to a Voltage generator

(100 VDC). The measured impedance value should be over 9.5 MΩ.

Terminal 14 and the external ground terminal of the housing are connected to a Voltage generator (500 VAC RMS) for 1 minute. The leakage current should remain below 12 mA.

4.1 Accuracy Testing

Our automated testing facility checks the resistivity input accuracy of the instrument using a calibrated variable resistor (decade resistor box).

4.2 Accuracy Testing of all supported temperature elements

Our automated testing facility checks the input accuracy of the instrument using a calibrated variable resistor (decade resistor box) to simulate the resistance of all temperature elements.

025

F70.00

12-2 Test Certificate

IM 12D7B3-E-H

4.3 Overall Accuracy Test

This test can be performed by the end-user to check the overall accuracy of the instrument. The data specified on the Test certificate are results of the overall accuracy test performed during production and can be reproduced by performing similar tests with the following test equipment:

1. A variable resistor (resistor decade box 1) to simulate the temperate element. All tests are performed simulating 25ºC (77 ºF).

2. A second variable resistor (box 2) to simulate the conductivity. Recommended is a resistor decade

box in steps of 1 Ω, between 2 Ω and 1200 kΩ. (accuracy 0.1%)

3. A fixed resistor of 300 Ω to simulate the mA-output load.

4. Screened cable to connect the input signals (a WU20 cable with a length of 2 metres is preferred)

5. A stabilised voltage supply unit : nominal 24 Volt DC

6. A current meter for DC currents up to 25 mA, resolution 1µA, accuracy 0.1%

Connect the SC202 as shown in Figure 1. Set box 1 to simulate 25 ºC (1097,3 Ω for Pt1000).

Before starting the actual test, the SC202 and peripheral testing equipment has to be connected to the power supply for at least 5 minutes, to assure the instrument is warmed up properly.

Figure 1. Connection diagram for the overall accuracy test

The tolerances specified relate to the performance of the SC202 with calibrated purpose built test equipment under controlled test conditions (humidity, ambient temperature). Note that these accuracy’s are only reproducible when performed with similar test equipment under similar test conditions. Under other conditions, the accuracy and linearity of the test equipment will be different. The display may show values, which differ as much as 1% from those measured under controlled conditions.

5. Accuracy test mA output circuit

Our automated testing facility checks the output accuracy of the instrument with simulated mA-output values.

RESISTANCE DECADE BOX

SC202

- + G

HIGH RANGE RESISTANCE DECADE BOX

䊉

13 14 15 16

DECADE BOX 2 (Conductivity)

DECADE BOX 1 (Temperature)

mA Meter

300 Ω

+ -

24 Volts DC Supply

Test Certificate 12-3

IM 12D7B3-E-H

EUROPEAN HEADQUARTERS

Yokogawa Europe B.V.

Databankweg 20 3821 AL AMERSFOORT The Netherlands Tel. +31-33-4641 611 Fax +31-33-4641 610 E-mail: info@yokogawa.nl www.yokogawa-europe.com

THE NETHERLANDS

Yokogawa Nederland B.V.

Hoofdveste 11 3992 DH HOUTEN Tel. +31-30-635 77 77 Fax +31-30-635 77 70

AUSTRIA

Yokogawa Ges.m.b.H. Central East Europe

Franzosengraben 1 A-1030 WIEN Tel. +43-1-206 340 Fax +43-1-206 34 800

AUSTRALIA

Yokogawa Australia Pty Ltd.

Private mail bag 24 Centre Court D3 25-27 Paul Street North NORTH RYDE, N.S.W. 2113 Tel. +61-2-805 0699 Fax +61-2-888 1844

SINGAPORE

Yokogawa Engineering Asia Pte. Ltd.

11, Tampines Street 92 SINGAPORE, 528872 Tel. +65-783 9537 Fax +65-786 2606

Manufactured by: GERMANY

Rota Yokogawa GmbH & Co. KG

Rheinstrasse 8 D-79664 WEHR Tel. +49-7761-567 0 Fax +49-7761-567 126

SOUTH AFRICA

Yokogawa South Africa (Pty) ltd. 67 Port Road, Robertsham Southdale 2135, JOHANNESBURG Tel. +27-11-680-5420 Fax +27-11-680-2922

BELGIUM

Yokogawa Belgium N.V./S.A.

Minervastraat 16 1930 ZAVENTEM Tel. +32-2-719 55 11 Fax +32-2-725 34 99

NORTHERN EUROPE

Yokogawa Nordic A.B.

Finlandsgatan 52, 2fl SE-164 74 Kista STOCKHOLM Tel. +46-8-477-1900 Fax +46-8-477-1999

FRANCE

Yokogawa France S.A.

Vélizy Valley 18-20 Rue Grange Dame Rose 78140 VELIZY VILLACOUBLAY Tel. +33-1-39 26 10 00 Fax +33-1-39 26 10 30

GERMANY

Yokogawa Deutschland GmbH

Berliner Strasse 101-103 D-40880 RATINGEN Tel. +49-2102-4983 0 Fax +49-2102-4983 22

HUNGARY

Yokogawa Hungaria Ltd. Alkotas Center 39 C 1123 BUDAPEST Tel. +36-1-355 3938 Fax +36-1-355 3897

ITALY

Yokogawa Italia S.r.l.

Vicolo D. Pantaleoni, 4 20161 MILANO Tel. +39-02-66 24 11 Fax +39-02-645 57 02

SPAIN/PORTUGAL

Yokogawa Iberia S.A.

C/Francisco Remiro, N°2, Edif. H 28028 MADRID Tel. +34-91-724 20 80 Fax +34-91-355 31 40

UNITED KINGDOM

Yokogawa United Kingdom Ltd.

Stuart Road, Manor Park, RUNCORN Cheshire WA7 1TR Tel. +44-1-928 597100 Fax +44-1-928 597101

UNITED STATES OF AMERICA

Yokogawa Corporation of America

2 Dart Road NEWNAN, GA 30265-1040 Tel. +1-770-253 70 00 Fax +1-770-251 28 00

CENTRAL/EAST REGION

Via Yokogawa Ges.m.b.H.: Czechia, Slovakia, Poland, Croatia, Slovenia, Jugoslavia, Bulgaria, Romania, Macedonia, Bosnia & Herzegovina

Distributors in:

Denmark, Finland, Greece, Norway, Portugal, Russian Federation, Sweden, Switzerland and Turkey.

Block 03, 06-01

ISO 9001

certificated

firm

YOKOGAWA

YOKOGAWA SC202S User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual