Yokogawa SC202 User Manual

User’s
Manual

Model SC202G [Style: S3], SC202S [Style: S3]

2-wire Conductivity or
Resistivity Transmitter

IM 12D08B02-01E

IM 12D08B02-01E

8th Edition

TABLE OF CONTENTS

PREFACE

1. Introduction And General Description ............................................................. 1-1

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

1-2. Application ...................................................................................................... 1-3

2. general Specifications ....................................................................................... 2-1

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

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

2-3. Model and suffix codes ................................................................................... 2-5

2-4. Control Drawing SC202S mA HART® Specification (IECEx) ......................... 2-6

2-6. Control Drawing SC202S mA HART® Specification ............................................

(FM Intrinsically safe design). .......................................................................... 2-8

2-8. Control Drawing of SC202S mA HART® Specification (CSA) ...................... 2-10

2-9. Control Drawing of SC202S FF/PB Specification (IECEx) ............................2-11

2-10. Control Drawing of SC202S FF/PB Specification (ATEX) .......................... 2-12

2-11. Control Drawing of SC202S FF/PB Specification ..............................................

(FM Intrinsically safe Entity) ........................................................................... 2-13

2-12. Control Drawing of SC202S FF/PB Specification ..............................................

(FM Intrinsically safe FISCO) ......................................................................... 2-15

2-13. Control Drawing of SC202S FF/PB Specification ..............................................

(FM Non-incendive Entity) ............................................................................. 2-17

2-14. Control Drawing of SC202S FF/PB Specification ..............................................

(FM Non-incendive FNICO) ........................................................................... 2-18

2-15. Control Drawing of SC202S FF/PB Specification (CSA) ............................ 2-19

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. Installation in: Hazardous Area-Non-Incendive ..............................................................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. Other sensor systems ..................................................................................... 3-7

3-6-1. Sensor cable connections using junction box (BA10) and extension cable (WF10) .......3-7

IM 12D08B02-01E
8th Edition: Oct. 2009(YK)
All Rights Reserved, Copyright © 2001, Yokogawa Electric Corporation

IM 12D08B02-01E

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

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

5-3.Service Codes ................................................................................................. 5-8

5-3-1. Parameter specific functions ...........................................................................................5-8

5-3-2. Temperature measuring functions .................................................................................5-10

5-4. Temperature compensation functions ........................................................... 5-12

5-5. mA output functions ...................................................................................... 5-14

5-6. User interface ............................................................................................... 5-16

5-7. Communication setup ................................................................................... 5-18

5-8. General ..................................................................................................... 5-18

5-9. Test and setup mode ................................................................................... 5-18

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 of the sensor ............................................................... 7-1

8. Troubleshooting ................................................................................................. 8-1

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

8-1-1. Off-line checks .................................................................................................................8-1

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

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 up SC202 for USP ............................................................................... 9-2

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

IM 12D08B02-01E

11. Appendix 1 ....................................................................................................... 1-1

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

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

11-3. Matrix data table (user selectable in code 22) .............................................. 1-2

11-4. Sensor Selection ........................................................................................... 1-3

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

11-4-2. Sensor selection ............................................................................................................1-3

11-4-3. Selecting a temperature sensor.....................................................................................1-3

11-5. Setup for other functions ............................................................................... 1-3

11-6. User setting table .......................................................................................... 1-4

11-7. Error codes ................................................................................................... 1-6

11-8. Device Description (DD) menu structure ...................................................... 1-7

12. APPENDIX 2 ...................................................................................................... 2-1

12-1. Preface ....................................................................................................... 2-1

12-2. Wiring diagrams ............................................................................................ 2-2

1. Example of Non-Explosionproof System ..............................................................................2-2

2. Example of Intrinsically Safe Explosionproof System ...........................................................2-2

12-3. Sensor wiring ................................................................................................ 2-4

12-4. Supplement of parameter setting .................................................................. 2-5

12-4-1. Set cell constant (service code 03) ...............................................................................2-5

12-4-2. Temperature sensor (service code 10) .........................................................................2-5

12-4-3. Automatic return (service code 50) ...............................................................................2-5

12-4-4. Error setting (service code 53) ......................................................................................2-6

12-4-5. E5 and E6 setting (service code 54) .............................................................................2-6

12-4-6. Communication with PH201G (style B) distributor (service code 60) ...........................2-6

13. Appendix 3 QUALITY INSPECTION ................................................................. 3-1

13-1. SC202G 2-Wire Conductivity Transmitter ..................................................... 3-1

13-2. SC202S 2-Wire Conductivity Transmitter ..................................................... 3-5

13-3. SC202G, SC202S 2-Wire Conductivity Transmitter ..........................................

(Fieldbus Communication) ............................................................................... 3-9

13-4. SC202G, SC202S 2-Wire Conductivity Transmitter ..........................................

(Profibus Communication) ............................................................................. 3-13

Customer Maintenance Parts List SC202G (Style : S3) ........CMPL 12D08B02-03E

Customer Maintenance Parts List SC202S (Style : S3).........CMPL 12D08B02-23E

Revision Record ..........................................................................................................i

In this manual a sign appears if it concerns the SC202G -A and SC202S-A, -N, -K.

mA

IM 12D08B02-01E

PREFACE

DANGER

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 international and
regional standards. Yokogawa accepts no responsi­bility for the misuse of this unit.

CAUTIONCAUTION

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 material or solvent when
cleaning the instrument.

Do not modify the SC202 transmitter.

WARNING

WARNING

Electrostatic charge may cause an explosion haz­ard. Avoid any actions that cause the generation of
electrostatic charge, e.g., rubbing with a dry cloth.

Warning label

Notice

• This manual should be passed on to the end
user.

• The contents of this manual are subject to
change without prior notice.

• The contents of this manual shall not be
reproduced or copied, in part or in whole,
without permission.

• This manual explains the functions contained in
this product, but does not warrant that they are
suitable the particular purpose of the user.

• Every effort has been made to ensure accuracy
in the preparation of this manual.

However, when you realize mistaken

expressions or omissions, please contact the
nearest Yokogawa Electric representative or
sales office.

• This manual does not cover the special
specifications. This manual may be left
unchanged on any change of specification,
construction

or parts when the change does not affect the

functions or performance of the product.

• If the product is not used in a manner specified
in this manual, the safety of this product may be
impaired.

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.

Safety and Modification Precautions

• Follow the safety precautions in this manual
when using the product to ensure protection
and safety of the human body, the product and
the system containing the product.

Because the enclosure of the Dissolved Oxygen
transmitter Type SC202S-A, -P, -F are made of alu­minium, if it is mounted in an area where the use of
category 1 G Zone 0 apparatus is required, it must
be installed such, that, even in the event of rare
incidents, ignition sources due to impact and friction
sparks are excluded.

IM 12D08B02-01E

The following safety symbols are used on the

product as well as in this manual.

DANGERDANGER

This symbol indicates that an operator must

follow the instructions laid out in this manual in
order to avoid the risks, for the human body, of
injury, electric shock, or fatalities. The manual
describes what special care the operator must
take to avoid such risks.

DANGER

WARNINGWARNING

This symbol indicates that the operator must

refer to the instructions in this manual in order
to prevent the instrument (hardware) or software
from being damaged, or a system failure from
occurring.

CAUTIONCAUTION

This symbol gives information essential for

understanding the operations and functions.

This symbol indicates Protective Ground

Terminal

This symbol indicates Function Ground Terminal

(Do not use this terminal as the protective ground
terminal.)

This symbol indicates Alternating current.

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.

This symbol indicates Direct current.

IM 12D08B02-01E

ATEX Documentation

This procedure is only applicable to the countries
in European Union.

GB

All instruction manuals for ATEX Ex related prod­ucts are available in English, German and French.
Should you require Ex related instructions in your
local language, you are to contact your nearest
Yokogawa office or representative.

DK

Alle brugervejledninger for produkter relateret
til ATEX Ex er tilgængelige på engelsk, tysk og
fransk. Skulle De ønske yderligere oplysninger
om håndtering af Ex produkter på eget sprog, kan
De rette henvendelse herom til den nærmeste
Yokogawa afdeling eller forhandler.

I

Tutti i manuali operativi di prodotti ATEX con­trassegnati con Ex sono disponibili in inglese,
tedesco e francese. Se si desidera ricevere i man­uali operativi di prodotti Ex in lingua locale, met­tersi in contatto con l’ufficio Yokogawa più vicino o
con un rappresentante.

E

Todos los manuales de instrucciones para los pro­ductos antiexplosivos de ATEX están disponibles
en inglés, alemán y francés. Si desea solicitar las
instrucciones de estos artículos antiexplosivos en
su idioma local, deberá ponerse en contacto con
la oficina o el representante de Yokogawa más
cercano.

NL

Alle handleidingen voor producten die te maken
hebben met ATEX explosiebeveiliging (Ex)
zijn verkrijgbaar in het Engels, Duits en Frans.
Neem, indien u aanwijzingen op het gebied van
explosiebeveiliging nodig hebt in uw eigen taal,
contact op met de dichtstbijzijnde vestiging van
Yokogawa of met een vertegenwoordiger.

SF

Kaikkien ATEX Ex -tyyppisten tuotteiden käyt­töhjeet ovat saatavilla englannin-, saksan- ja
ranskankielisinä. Mikäli tarvitsette Ex -tyyppisten
tuotteiden ohjeita omalla paikallisella kielellännne,
ottakaa yhteyttä lähimpään Yokogawa-toimistoon
tai -edustajaan.

P

Todos os manuais de instruções referentes aos
produtos Ex da ATEX estão disponíveis em Inglês,
Alemão e Francês. Se necessitar de instruções na
sua língua relacionadas com produtos Ex, deverá
entrar em contacto com a delegação mais próxima
ou com um representante da Yokogawa.

F

Tous les manuels d’instruction des produits
ATEX Ex sont disponibles en langue anglaise,
allemande et française. Si vous nécessitez des
instructions relatives aux produits Ex dans votre
langue, veuillez bien contacter votre représentant
Yokogawa le plus proche.

D

Alle Betriebsanleitungen für ATEX Ex bezogene
Produkte stehen in den Sprachen Englisch,
Deutsch und Französisch zur Verfügung. Sollten
Sie die Betriebsanleitungen für Ex-Produkte in
Ihrer Landessprache benötigen, setzen Sie sich
bitte mit Ihrem örtlichen Yokogawa-Vertreter in
Verbindung.

S

Alla instruktionsböcker för ATEX Ex (explosions­säkra) produkter är tillgängliga på engelska, tyska
och franska. Om Ni behöver instruktioner för
dessa explosionssäkra produkter på annat språk,
skall Ni kontakta närmaste Yokogawakontor eller
representant.

GR

IM 12D08B02-01E

SK

CZ

PL

SLO

LT

LV

EST

H

BG

RO

IM 12D08B02-01E

M

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/cm 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

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

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

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

ZERO calibration inactive adjustment +/-1 S/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

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

on LCD

(R)

, PH201*B 5.19 SC 60- 62

5.8-5.9, 6.1- 6.3 SC 03

5.17, 5.3- 5.4 “hold”, SC 50

5.17 SC 52

IM 12D08B02-01E

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 nameplates are shown below.

mA

CONDUCTIVITY TRANSMITTER

MODEL

SC202

SUFFIX

SUPPLY
OUTPUT

AMB.TEMP.

24V DC
4 20mA DC

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

N200

DISSOLVED OXYGEN TRANSMITTER

MODEL

SC202G-F

SUFFIX

No. IECEx KEM 06.0053X
Zone 0 Ex ia IIC T4
Zone 0 Ex ia IIC T6 for Ta:40
IP65
SEE CONTROL DRAWING

No. KEMA 06ATEX0220 X
Ex ia IIC T4

II 1G

Ex ia IIC T6 for Ta:40
SEE CONTROL DRAWING

IS CL I, DIV 1, GP ABCD
AND AEx ia IIC
T4

Type 4X

Install per CONTROL DRAWING
IKE026-A10 P.5 to P.6

CL I, DIV 1, GP ABCD
Ex ia IIC T4

R

Ex ia IIC T6 for Ta:40
SEE CONTROL DRAWING

LR81741 C

WARNING
Substitution of
components may impair
intrinsic safety

IP65 Type 3S

°C

°C

AVERTISSEMENT
La substitution de composants
peut compromeltre la securite
intrinseque.

SC202S-A

DISSOLVED OXYGEN TRANSMITTER

MODEL
SUFFIX

SC202G-P

°C

IP65

0344

No. IECEx KEM 06.0053X
Ex nA[nL] IIC T4
Ex nA[nL] IIC T6 for Ta:40
IP65
SEE CONTROL DRAWING

No. KEMA 06ATEX0221
EEx nA[nL] IIC T4

II 3 G

EEx nA[nL] IIC T6 for Ta:40
IP65
SEE CONTROL DRAWING

NI CL I, DIV 2, GP ABCD AND
CL I, ZN 2, GP IIC
T4

Type 4X

Install per CONTROL DRAWING
IKE026-A10 P.7 to P.8

Ex nA[nL] IIC
NI CL I, DIV 2, GP ABCD
T4

R

T6 for Ta:40

IP65 Type 3S

LR81741 C

WARNING
Substitution of
components may
impair suitability
for class I, Division 2.

SEE CONTROL DRAWING

AVERTISSEMENT
La substitution de composants
peut rendre ce materiel
inacceptable pour les
emplacements de
Classe I, Division 2.

°C

°C

°C

SC202S-N

CONDUCTIVITY TRANSMITTER

MODEL
SUFFIX

SC202S-K

SUPPLY
OUTPUT

AMB.TEMP.

9 TO 32VDC

FF-TYPE113

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

Figure 1-1. Nameplate

N200

SUPPLY
OUTPUT

AMB.TEMP.

9 TO 32VDC
PROFIBUS-PA

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

N200

SUPPLY
OUTPUT

AMB.TEMP.

24V DC
4 20mA DC

-10  55°C
STYLE
No.

Cert No. GYJ081157X
Ex ia IIC T4
Ex ia IIC T6 for Ta:40
SEE USER’S MANUAL BEFORE USE

Made in Japan Tokyo 180-8750 JAPAN

IM 12D08B02-01E

˚C

1-2 Introduction

CONDUCTIVITY TRANSMITTER

MODEL

SC202S-F

SUFFIX

SUPPLY

OUTPUT

AMB.TEMP.

FISCO

17.5VDC

or 24VDC

/380mA/5.32W

/250mA/1.2W

FF-TYPE111 or 511
Li=0 μH, Ci=220pF

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

0344

N200

CONDUCTIVITY TRANSMITTER

MODEL

SC202S-P

SUFFIX

SUPPLY

OUTPUT

AMB.TEMP.

FISCO

17.5VDC

or 24VDC

/380mA/5.32W

/250mA/1.2W

PROFIBUS-PA
Li=0 μH, Ci=220pF

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

0344

N200

FISCO field device

IECEx KEM 07.0027X

No.
Zone 0 Ex ia IIC T4

IP65
SEE CONTROL DRAWING

KEMA 07ATEX0050 X

No.
Ex ia IIC T4

II 1G

SEE CONTROL DRAWING
IP65

IS CL I, DIV 1, GP ABCD
AND AEx ia IIC
T4

Type 4X
Install per CONTROL DRAWING
IKE027-A10 P.5 to P.8

CL I, DIV 1, GP ABCD
Ex ia IIC T4

R

LR81741 C

WARNING
Substitution of
components may impair
intrinsic safety

SEE CONTROL DRAWING
IP65 Type 3S

AVERTISSEMENT
La substitution de composants
peut compromeltre la securite
intrinseque.

SC202S-F/-P

FNICO field device

IECEx KEM 07.0027X

CONDUCTIVITY TRANSMITTER

MODEL

SC202S-B

SUFFIX

SUPPLY
OUTPUT

AMB.TEMP.

9 TO 32VDC
FF-TYPE 113

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

N200

Figure 1-2. Nameplate

CONDUCTIVITY TRANSMITTER

MODEL

SC202S-D

SUFFIX

SUPPLY
OUTPUT

AMB.TEMP.

9 TO 32VDC
PROFIBUS-PA

-10  55°C
STYLE
No.

Made in Japan Tokyo 180-8750 JAPAN

N200

LR81741 C

WARNING
Substitution of
components may
impair suitability
for class I, Division 2.

SC202S-B/-D

No.
Ex nA[nL] IIC T4
Ex nA[nL] IIC T6 for Ta:40
IP65
SEE CONTROL DRAWING

No.

KEMA 07ATEX0051

EEx nA[nL] IIC T4

II 3 G

EEx nA[nL] IIC T6 for Ta:40
IP65
SEE CONTROL DRAWING

NI CL I, DIV 2, GP ABCD AND
CL I, ZN 2, GP IIC
T4

Type 4X
Install per CONTROL DRAWING
IKE027-A10 P.9 to P.10

Ex nA[nL] IIC
NI CL I, DIV 2, GP ABCD
T4

R

T6 for Ta:40

IP65 Type 3S

SEE CONTROL DRAWING

AVERTISSEMENT
La substitution de composants
peut rendre ce materiel
inacceptable pour les
emplacements de
Classe I, Division 2.

°C

°C

°C

NOTE: 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 English
Optional mounting hardware when specified (See model code)

IM 12D08B02-01E

Introduction 1-3

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 self­diagnostics 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 (NEMA 4X) 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.
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 EN61326 Class A without compromise, to assure the user of continued accu­rate performance in even the most demanding industrial installations.

IM 12D08B02-01E

1-4 Introduction

IM 12D08B02-01E

2. GENERAL SPECIFICATIONS

Specifications 2-1

2-1. Specifications A. Input specifications

: Two or four electrodes measurement with

square wave excitation. Cell constants from

0.008 to 50 cm

-

1

.

B. Detection method

: Frequency, read-pulse position and reference

voltage are dynamically optimized.

C. Input ranges

- Conductivity :
Minimum : 0 S/cm
Maximum : 200 mS x (Cell constant)

(overrange 1999 mS / cm).

- Resistivity :
Minimum : 0.005 k/ (Cell constant)
Maximum : 999 M x cm

- Temperature
Pt1000 : -20 to +250 °C (0 to 500 °F)

Pt100 and Ni100 : -20 to +200 °C (0 to 400 °F)
8K55 NTC : -10 to +120 °C (10 to 250 °F)
PB36 NTC : -20 to +120 °C (0 to 250 °F)

mAmA

D. Output Span

- Conductivity : - min 0.01S/cm
: - max. 1999 mS/cm. (max 90%

zero suppression)

- Resistivity : - min 0.001kxcm
: - max. 999 M x cm. (max 90%

zero suppression)

mAmA

E. Transmission Signal

: Isolated output of 4-20 mA DC

Burn up (21 mA) or Burn down

(3.6 mA when HART® or distributor comm. is

non-used, 3.9 mA when HART® or distributor

comm. is used) or pulse of 21 mA to signal

failure.

F. Temperature compensation

: Automatic, for temperature ranges mentioned

under C (inputs).

- Reference temp.
:

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

G. Compensation algorithm

-NaCl :

According IEC 60746-3 NaCl tables
(default).

-T.C. : Two independent user program­mable temperature coefficients,
from -0.0% to 3.5% per °C (°F)
by adjustment or calibration.

- Matrix :

Conductivity function of concentra­tion and temperature. Choice out of

5 preprogrammed matrixes and a 25­point user-programmable matrix.

H. Logbook

: Software record of important events and diag-

nostic data. Available through HART® link,
with diagnostic information available in the
display.

I. Display

: Custom liquid crystal display, with a main dis-

play of 31/2 digits 12.5 mm high. Message dis­play of 6 alpha numeric characters, 7 mm high.
Warning flags and units (mS/cm, k·cm, S/
cm and M·cm) as appropriate.

J. Power supply

: Nominal 24 volt DC loop powered system.
SC202G ; 17 to 40 volts, see Fig.2-1
SC202S : 17 to 31.5 volts, see Fig.2-2

Maximum load resistance

For the SC202G, see Fig. 1
200 or less with the PH201G
50 or less with the SDBT
For the SC202S, see Fig. 2-2

1150

1000

800

600

400

200
150

Load Resistance ()

0

Fig.2-1 Supply voltage/ load diagram for the SC202G

800

775

600

425

400

200

Load Resistance ()

0

12 16

Fig.2-2 Supply voltage/ load diagram for the SC202S

10 201817 30 400

Voltage (V)

17

20 24 28 32

Voltage (V)

Possible

F06.EPS

Possible

K. Input isolation

: 1000 VDC

L. Weight

Body weight : approx. 1.6 kg

Mounting brackets weight: approx. 0.7 kg.

31.5 V

IM 12D08B02-01E

2-2 Specifications

2-2. Operating specifications A. Performance (under reference conditions with

sensor simulation)

Conductivity (2 S x K cm-1 to 200 mS x K cm-1)

- Accuracy : ±0.5% F.S.

-1

Conductivity (1 S x K cm

to 2 S x K cm-1)

- Accuracy : ±1% F.S.

Resistivity (0.005k/ K cm

-1

to 0.5M/ K cm-1)

- Accuracy : ±0.5% F.S.

-1

Resistivity (0.5M/ K cm

to 1M/ K cm-1)

- Accuracy : ±1% F.S.

Temperature (Pt1000, PB36 NTC, Ni100)

- Accuracy : ±0.3°C

Temperature (Pt100, 8.55k NTC)

mA

- Accuracy : ±0.4°C

Temperature compensation

- NaCl table : ±1 %

- Matrix : ±3 %

Note on performance specifications:

"F.S." means maximum setting value of

transmitter output. "K" means cell constant.
YOKOGAWA provides conductivity sensors
which cell constant are 0.1 to 10 cm

-1

.
The following tolerance is added to above
performance.
mA output tolerance : ± 0.02 mA of
"4 - 20 mA"

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

seconds

B. Ambient operating temperature

: -10 to +55 °C (-10 to 130 ºF)

C. Storage temperature

: -30 to +70 °C (-20 to 160 ºF)

D. Humidity

: 10 to 90% RH non-condensing

E. Housing

: Cast aluminium case with chemically resist-

ant coating, cover with flexible polycarbonate
window. Case color is off-white (Equivalent
to Munsell 2.5Y8.4/1.2) and cover is
Deepsea Moss green (Equivalent to Munsell

0.6GY3.1/2.0). Cable entry is via two PG13.5
nylon glands. Weather resistant to IP65 and
NEMA 4X standards. Pipe wall or panel mount­ing, using optional hardware.

F. Data protection

: EEPROM for configuration and logbook

G. Automatic safeguard

: Return to measuring mode when no key-

stroke is made for 10 min.

H. Operation protection

: 3-digit programmable password.

I. EMC Conformity standards

EN 61326-1 Class A, Table 2

,

(For use in industrial locations)
EN 61326-2-3
EN 61326-2-5 (pending)

CAUTION

This instrument is a Class A product, and it is
designed for use in the industrial environment.
Please use this instrument in the industrial
environment only.

J. Explosionproof type

Refer to control drawings.

Item

Factory
Mutual (FM)

CENELEC
ATE X

Item

Factory
Mutual (FM)

FM Intrinsically safe Approval

Applicable standard: FM3600, FM3610, FM3810
Intrinsically Safe for Class I, Division 1, Groups ABCD
Class I, Zone 0, AEx ia IIC
Temp. Class: T4, Amb. Temp.: -10 to 55°C
Intrinsically Safe Apparatus Parameters
Vmax=31.5 V, Imax=100 mA,
Pmax=1.2 W, Ci=22 nF, Li=35 H

FM Non-incendive safe Approval

Applicable standard: FM3600, FM3611, FM3810
Non-incendive Safe for Class I, Division 2,
Groups ABCD, Zone 2
Temp. Class: T4, Amb. Temp.: -10 to 55°C
Non-incendive Safe Apparatus Parameters
Vmax=31.5 V, Ci=22 nF, Li=35 H

CENELEC ATEX (KEMA) Intrinsically safe Approval

Applicable standard: EN60079-0, EN50020
EN60079-26
Certificate: KEMA 06ATEX0220 X

Ex ia IIC, Group: II, Category: 1G

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=31.5 V, Ii=100 mA, Pi=1.2 W, Ci=22 nF, Li=35 H

CENELEC ATEX (KEMA) Type of protection "n"

Applicable standard: EN60079-0:2006,
EN60079-15:2003
Certificate: KEMA 06ATEX0221

EEx nA [nL] IIC, Group: II, Category: 3G

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=31.5 V, Ci=22 nF, Li=35 H

FM Intrinsically safe Approval

Applicable standard: FM3600, FM3610, FM3810
Intrinsically Safe for Class I, Division 1, Groups ABCD
Class I, Zone 0, AEx ia IIC
Temp. Class: T4, Amb. Temp.: -10 to 55°C
Intrinsically Safe Apparatus Parameters

Entity

FISCO

FM Non-incendive safe Approval

Applicable standard: FM3600, FM3611, FM3810
Non-incendive Safe for Class I, Division 2,
Groups ABCD, Zone 2
Temp. Class: T4, Amb. Temp.: -10 to 55°C
Non-incendive Safe Apparatus Parameters

Entity

FNICO

Description

Description

Vmax=24 V, Imax=250 mA,
Pmax=1.2 W, Ci=220 pF, Li=0 H
Vmax=17.5 V, Imax=380 mA,
Pmax=5.32 W, Ci=220pF, Li=0 H

Vmax=32 V, Pmax=1.2 W,
Ci=220 pF, Li=0 H
Vmax=32 V, Pmax=5.32 W,
Ci=220 pF, Li=0 H

Code

-A

-N

-A

-N

2.EPS

Code

-P

or

-F

-B

or

-D

FM.EPS

IM 12D08B02-01E

mA

Item

CENELEC
ATE X

Entity

CENELEC
ATE X

FISCO

CENELEC
ATE X

Item

Canadian
Standards
Association
(CSA)

IECEx
Scheme

Item

Canadian
Standards
Association
(CSA)

Description

CENELEC ATEX (KEMA) Intrinsically safe Approval

Applicable standard: EN60079-0, EN50020
EN60079-26
Certificate: KEMA 07ATEX0050 X

Ex ia IIC, Group: II, Category: 1G

Temp. Class: T4, Amb. Temp.: -10 to 55°C
Ui=24 V, Ii=250 mA, Pi=1.2 W, Ci=220 pF, Li=0 H

CENELEC ATEX (KEMA) Intrinsically safe Approval

Applicable standard: EN60079-0, EN50020
EN60079-26, EN60079-27
Certificate: KEMA 07ATEX0050 X

Ex ia IIC, Group: II, Category: 1G

Temp. Class: T4, Amb. Temp.: -10 to 55°C
Ui=17.5 V, Ii=380 mA, Pi=5.32 W, Ci=220 pF, Li=0 H

CENELEC ATEX (KEMA) Type of protection "n"

Applicable standard: EN60079-0:2006,
EN60079-15:2003
Certificate: KEMA 07ATEX0051

EEx nA [nL] IIC, Group: II, Category: 3G

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=32 V, Ci=220 pF, Li=0 H

Description

CSA Intrinsically safe Approval

Applicable standard: C22.2, No. 0-M1991,
C22.2, No. 04-M2004, C22.2, No. 157-M1992,
C22.2, No. 61010-1

Ex ia Class I, Division 1, Groups ABCD
Ex ia IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui(Vmax)=31.5 V, Ii(Imax)=100 mA,
Pi(Pmax)=1.2 W, Ci=22 nF, Li=35 H

CSA Non-incendive safe Approval or
type of protection "n"

Applicable standard: C22.2, No.0-M1991,
C22.2, No.04-M2004, C22.2, No.157-M1992,
C22.2, No.213-M1987, C22.2, No.61010-1
Class I, Division 2, Groups ABCD

Ex nA [nL] IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui(Vmax)=31.5 V, Ci=22 nF, Li=35 H

IECEx Intrinsically safe

Applicable standard: IEC 60079-0, IEC60079-11,
IEC60079-26
Certificate: IECEx KEM 06.0053X

Zone 0 Ex ia IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=31.5 V, Ii=100 mA, Pi=1.2 W, Ci=22 nF, Li=35 H

IECEx Type of protection "n"

Applicable standard: IEC 60079-15:2001,
IEC 60079-0:2004
Certificate: IECEx KEM 06.0053X

Ex nA [nL] IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=31.5 V, Ci=22 nF, Li=35 H

Description

CSA Intrinsically safe Approval

Applicable standard: C22.2, No. 0-M1991,
C22.2, No. 04-M2004, C22.2, No. 157-M1992,
C22.2, No. 61010-1

Ex ia Class I, Division 1, Groups ABCD
Ex ia IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C

Ui(Vmax)=24 V, Ii(Imax)=250 mA,

Entity

Pi(Pmax)=1.2 W, Ci=220 pF, Li=0 H
Ui(Vmax)=17.5 V, Ii(Imax)=380 mA,

FISCO

Pi(Pmax)=5.32 W, Ci=220 pF, Li=0 H

CSA Non-incendive safe Approval or
type of protection "n"

Applicable standard: C22.2, No.0-M1991,
C22.2, No.04-M2004, C22.2, No.157-M1992,
C22.2, No.213-M1987, C22.2, No.61010-1
Class I, Division 2, Groups ABCD

Ex nA [nL] IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C

Ui(Vmax)=32 V, Ci=220 pF, Li=0 H

Entity:
FNICO:

Ui(Vmax)=32 V, Ci=220 pF, Li=0 H

Code

-P

or

-F

-B

or

-D

ATEX.EPS

Code

-A

-N

-A

-N

T12E.EPS

Code

-P

or

-F

-B

or

-D

CSA.EPS

Specifications 2-3

Item

IECEx
Scheme

Entity

IECEx
Scheme

FISCO

IECEx
Scheme

IECEx Intrinsically safe

Applicable standard: IEC 60079-0, IEC60079-11,
IEC60079-26
Certificate: IECEx KEM 07.0027X

Zone 0 Ex ia IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
Ui=24 V, Ii=250 mA, Pi=1.2 W, Ci=220 pF, Li=0 H

IECEx Intrinsically safe

Applicable standard: IEC 60079-0, IEC60079-11,
IEC60079-26, IEC60079-27
Certificate: IECEx KEM 07.0027X

Zone 0 Ex ia IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
Ui=17.5 V, Ii=380 mA, Pi=5.32 W, Ci=220 pF, Li=0 H

IECEx Type of protection "n"

Applicable standard: IEC 60079-15:2001,
IEC 60079-0:2004
Certificate: IECEx KEM 07.0027X

Ex nA [nL] IIC

Temp. Class: T4, Amb. Temp.: -10 to 55°C
T6, Amb. Temp.: -10 to 40°C
Ui=32 V, Ci=220 pF, Li=0 H

Description

Code

mA

NEPSI Certification (SC202S-K)

NEPSI Intrinsically Safe Type

Cert No. GYJ081157X

• Applicable Standard:
GB3836.1-2000, GB3836.4-2000

• Type of Protection and Marking Code:
Ex ia IIC T4/T6

• Ambient Temperature :
T6; –10 to 40°C, T4; –10 to 55°C

Note 1 Entity Parameters

• Intrinsically safe input parameters
(terminal + and -):

Maximum Input Voltage (Ui) = 31.5 V
Maximum Input Current (Ii) = 100 mA
Maximum Input Power (Pi) = 1.2 W
Maximum Internal Capacitance (Ci) = 22 nF
Maximum Internal Inductance (Li) = 35 H

• Intrinsically safe output parameters and
maximum external parameters

(terminal 11 and 16):

Uo=14.4 V, Io=13 mA, Po=185 mW, Co=59
nF, Lo=200 mH

Note 2 Installation

• Electrostatic charges on the display window
shall be avoided.

• The external earth connection facility shall be
connected reliably.

• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation and will void NEPSI Intrinsically
safe certification.

• The user shall not change the configuration
in order to maintain/ensure the explosion
protection performance of the equipment. Any
change may impair safety.

• For installation, use and maintenance of
the product, the end user shall observe the
instruction manual and the following standards:

GB50257-1996 "Code for construction and
acceptance of electric device for explosion
atmospheres and fire hazard electrical
equipment installation engineering''.

IM 12D08B02-01E

-P

or

-F

-B

or

-D

IEC.EPS

2-4 Specifications

GB3836.13-1997 "Electrical apparatus for
explosive gas atmospheres Part 13: Repair and
overhaul for apparatus used in explosive gas
atmospheres".
GB3836.15-2000 "Electrical apparatus for
explosive gas atmospheres- Part 15: Electrical
installations in hazardous area (other than
mines)" .
GB3836.16-2006 "Electrical apparatus for
explosive gas atmospheres- Part 16: lnspection
and maintenance of electrical installation (other
than mines)".

mA

mA-HART® communication
A. Input : Two wire system 4-20 mA

B. Power supply :

SC202G : up to 40 volts
SC202S : up to 31.5 volts
Note: The transmitter contains a switched

power supply, drawing its energy
from the 0-4 mA section of the
signal. Consequently the 17 volt limit
is applied at 4 mA. The characteristic
of the unit is such that above about
7 mA on the output, the terminal
voltage can drop to 14.5 volts
without problem. (see figure 2-2)

C. Transmission: Isolated output of 4 to 20 mA DC.
D. Signal : Maximum load 425 at 24 VDC.

(see fi gure 2-1)

Burn to signal failure acc

NAMUR Recommendation NE43
(18.01.1994)

E. Operating range : 3.9 to 21mA
F. Communication

: HART®, 1200 Baud, FSK modulated

on 4 to 20 mA signal

G. Configuration : Local with 6 keys

H. Software : Firmware based on Yokogawa stack.

I. Hardware :

Yokogawa HART® Modem F9197UB

J. Other Control systems

: Yokogawa PRM, Rosemount

AMS, Siemens PDM

K. Hand Terminal :

L. Other control systems: Yokogawa PRM, Rose-

Rosemount HHT 275/375

mount AMS, Siemens PDM

M. Output span :

- Conductivity : min 0.01S/cm, max. 1999 mS/
cm.
(max 90% zero suppression)

- Resistivity : min 0.001k·cm, max. 999
M·cm.
(max 90% zero suppression)
The instrument is user

programmable for linear or non­linear conductivity ranges.

N. Cable specification

: 0.5 mm diameter or 24 AWG over

maximum length of 1500 m

O. DD specification

: The SC202 Device Description is

available enabling communications
with the Handheld Communicator
and compatible devices.

PROFIBUS-PA communications
A. Input signal: Digital
B. Supply voltage: 9 to 32 V DC
C. Operating current: 26.0 mA
D. Operating values: According to IEC 1158-2
E. Bus connection

: Fieldbus interface base on

IEC1158-2 according to FISCO­Model

F. Power supply: Power supply is achieved depend-

ant on the application by means of
segment coupler

G. Data transfer: According to PROFIBUS- PA pro-

file class B based on EN 50170 and
DIN 19245 part 4

H. GSD file: The actual file can be downloaded

from www.profibus.com Configura­tion: Local with 6 keys

I. Software: Firmware based on Siemens

DPC31 stack.

J. Hardware:

PC- or PCMCIA-interfaces from

Siemens

K. Other control: Siemens PDM systems
L Electrical connection:

Terminals acc. to IEC 1158-2

M. Fieldbus-cable-types:

Twisted and shielded two wire

cable according to recommendation
based on IEC 1158-2 Cable
diameter: 6 to 12 mm (0.24 to 0.47
inch)

FOUNDATION FIELDBUS H1 communications
A. Input signal: Digital
B. Supply voltage: 9 to 32 V DC
C. Operating current: 26.0 mA (base current)
D. Operating values: According to IEC 1158-2
E. Bus connection

: Fieldbus interface based on IEC

1158-2

according to FISCO-Model

F. Power supply:

Power supply is achieved

dependant on application by means
of segment coupler

G. Data transfer:

FF specification Rev. 1.4 Basic

device

IM 12D08B02-01E

H. Function blocks:

K. Software: National Instruments:

3 x AI, Transducer, Resource

I. Files: Actual file can be downloaded

L. Hardware: F-BUS interfaces from National Instru-

from our homepage

J. Configuration: locally with 6 keys

M. Other control systems:
YOKOGAWA PRM, DTM

2-3. Model and suffix codes

1. 2-wire Conductivity transmitter (General purpose)

Model Suffix Code Option Code Description

SC202G

Type

Language

Option Mounting Hardware

(*1) It can be specified when the suffix code -A is selected.

(*2) The housing is coated with epoxy resin.

-A

-P

-F

-J

-E

Hood

Tag Plate

Conduit Adapter

/U

/PM

/H

/H2

/SCT

/AFTG

/ANSI

/TB

/X1

2-wire conductivity transmitter

mA with HART

Profibus

FF

Japanese

English

Pipe, wall mounting bracket (Stainless steel)

Panel mounting bracket (Stainless steel)

Hood for sun protection (Carbon steel)

Hood for sun protection (Stainless steel)

Stainless steel tag plate

G1/2

1/2NPT

Screw terminal (*1)

Epoxy baked finish (*2)

Specifications 2-5

NI-FBUS configurator

ments (AT-FBUS, PCMIA-FBUS)

[ Style : S3 ]

2. 2-wire Conductivity transmitter (Explosionproof type)

Model Suffix Code Option Code Description

SC202S

Type

Language

Option Mounting Hardware

(*1) The housing is coated with epoxy resin.
(*2) When the instrument with Suffix Code "-B,-N,-D" is used, take measures so that
the display window is not exposed to direct sunlight.

-A

-K

-P

-F

-B

-N

-D

-J

-E

Hood

Tag Plate

Conduit Adapter

/U

/PM

/H

/H2

/SCT

/AFTG

/ANSI

/X1

2-wire conductivity transmitter

Intrinsic safe mA with HART (ATEX, CSA, FM)

Intrinsic safe mA with HART (NEPSI)

Intrinsic safe Profibus (ATEX, CSA, FM)

Intrinsic safe FF (ATEX, CSA, FM)

Non-incendive FF (ATEX, CSA, FM) (*2)

Non-incendive mA with HART (ATEX, CSA, FM) (*2)

Non-incendive Profibus (ATEX, CSA, FM) (*2)

Japanese

English

Pipe, wall mounting bracket (Stainless steel)

Panel mounting bracket (Stainless steel)

Hood for sun protection (Carbon steel)

Hood for sun protection (Stainless steel)

Stainless steel tag plate

G1/2

1/2NPT

Epoxy baked finish (*1)

[ Style : S3 ]

IM 12D08B02-01E

2-6 Specifications

_

_

_

_

2-4. Control Drawing SC202S mA HART® Specification (IECEx)

SEN S OR(S )
terminals 11-16

SENSOR(S)
terminals 11-16

Intrinsically safe design
IECE x sta nd ard E x ia IIC : T4 for a m bient tem p . < 5 5°C

Certificate nr. IECEx KEM 06.0053X

(C ond uctiv ity/Resi stivity-transmitte r)

SC202S

T6 for am b ien t te m p. < 4 0 °C

+

G

Functional
earth

Hazardous area Safe area

Zone 0 or 1

Intr ins ic a lly s a fe d e s ig n
IECEx stan d ard Ex ia IIC : T 4 fo r a m bie nt te m p . < 55 °C

Certificate nr. IECEx KEM 06.0053X

(C onductivity/R esistivity-tr a ns mitter)

SC202S

T6 for ambient temp.< 40°C

+

G

Functional
earth

Hazardous area

Zone 0 or 1

Functional
earth

Ex ia or ib
Certified safety b arrier o r po w e r
with Rint=300
(HAR T com p atib le )

Uo = 31.5 Volt DC

Io = 100 mA

:

24 volts DC N o minal

Sup p ly V olta g e .

Load

Resistance

Ex ia or ib C er ti fie d R e p e a t e r
Power Supply

(HAR T Comp a t ib le)

+

Uo = 31.5 Volt DC

Io = 10 0 m A

Po = 1.2 Watt

Safe area

+

Output

Supply

・ Sensor(s) are of a passive type to be regarded as ‘simple apparatus’.
・ Electrical data of the SC202S.

- Supply and output circuit (terminals + and -):
Maximum input voltage U
Maximum input power P
Effective internal capacitance C
Effective internal inductance L

= 31.5 V. Maximum input current Ii = 100 mA.

i

= 1.2 W.

i

= 22 nF.

i

= 35 PH.

i

- Sensor input circuit (terminals 11 through 16):
Maximum output voltage U

= 14.4 V. Maximum output current Io = 13 mA.

o

Maximum allowed external capacitance Co = 59 nF (for SC202S-A),
Co = 2.9 PF (for SC202S-N).
Maximum allowed external inductance Lo = 200 mH (for SC202S-A),
Lo = 450 mH (for SC202S-N).

・ 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 IECEx certified intrinsically safe type
in case it is used on the intrinsically safe circuit in the hazardous area or of a
IECEx certified non-incendive type in case it is used in the non-incendive circuit
in the hazardous area.

IM 12D08B02-01E

2-5. Control Drawing SC202S mA HART® Specifi cation (ATEX)

_

_

_

_

Intrin s ically s a fe des ig n
CEN E LE C standa rd E Ex ia IIC : T4 for a m bient te mp . < 5 5 °C
T6 for ambient temp. < 40°C

Certificate nr. KEMA 06AT EX 0220 X

SC202S

(Co n ductivity/Re s is t ivit y- t ransm itter)

+

G

EEx ia o r ib
Certified safety barrier or power
with Rint=300

(HART compatible)

Uo = 3 1 .5 V olt D C
Io = 100 mA

:

Specifications 2-7

24 volts DC Nominal

Supply Voltage.

+

SENSOR(S)
terminals 11-16

SENSOR(S)
termin a ls 11 -1 6

Functional
earth earth

Hazardous area Safe area
Zone 0 or 1

Intrinsically safe design
CENELEC standard EEx ia IIC: T4 for ambient temp. < 55°C
T6 fo r am b ien t tem p .< 4 0 °C

Ce rt ific a te n r. K EM A 0 6 A T EX 0 2 2 0 X
SC202S

(Co n ductivity / Resis t ivit y- t ransm itter)

+

G

Functional
earth

Hazardous area

Zone 0 or 1

Functional

Load

Resistance

EEx ia or ib Certified Repeater
Power Supply
(HA R T Com p a t ib le )

+

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

Safe area

Output

Supply

・ Sensor(s) are of a passive type to be regarded as ‘simple apparatus’.
・ Electrical data of the SC202S.

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

Maximum input voltage U
Maximum input power P
Effective internal capacitance C
Effective internal inductance L

= 31.5 V. Maximum input current Ii = 100 mA.

i

= 1.2 W.

i

= 22 nF.

i

= 35 PH.

i

- Sensor input circuit (terminals 11 through 16):
Maximum output voltage U

= 14.4 V. Maximum output current Io = 13 mA.

o

Maximum allowed external capacitance Co = 59 nF (for SC202S-A),
Co = 2.9 uF (for SC202S-N).
Maximum allowed external inductance Lo = 200 mH (for SC202S-A),
Lo = 450 mH (for SC202S-N).

・ 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.

IM 12D08B02-01E

2-8 Specifications

_

_

_

2-6. Control Drawing SC202S mA HART® Specification (FM Intrinsically safe design).

Intrins ic a lly s a fe d e sign
FM Class I, Div.1, Group ABCD, T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
SC202S transmitter

FM Approved safety barrier or
power supply
with Rint = 300 :
(HART compatible)

24 volts DC Nominal

Supply Voltage.

+

+

Sensor
terminals 11-16
Max. cab lelength: 60 mtr.
Cable dia. : 3…12 mm.

Intrinsically safe design
FM Class I, Div.1, Group ABCD, T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
SC202S transmitter

Sensor
terminals 11-16
Max. cablelength: 60 mtr.
Cable dia.: 3…12 mm.

G

For electrical data:
see text below.

Classified Location

+

G

For electrical data:
see text below.

Classified Location

Functional

earth

Functional
earth

Functional
earth

Unclassified Location

Load

Resistance

FM Approved
Power Supply
(HART compatible)

+

Ùnclassified Location

-

Figure 1

Output

Supply

Figure 2

・ Electrical data of the SC202S.

- Supply circuit (terminals + and ):
Maximum input voltage Vmax = 31.5 V. Maximum input current Imax = 100 mA.
Maximum input power Pmax = 1.2 W.
Effective internal capacitance Ci = 22 nF. Effective internal inductance Li = 35 PH.

- Sensor input circuit (terminals 11 through 16) :
Maximum output voltage Vt = 14.4 V. Maximum output current It = 10 mA.
Maximum allowed external capacitance Ca = 59.36 nF.
Maximum allowed external inductance La = 340 mH.

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

Any FM Approved barrier or power supply may be used that meets the following requirements.
Voc or Vt d 31.5 V ; Isc or It d 100 mA; Ca t 22nF + Ccable ; La t 35PH + Lcable

If HHT is connected to the power supply lines of the 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.

(Voc or Vt ) + VHHT d 31.5 V; (Isc or It ) + IHHT d 100 mA;

Ca t 22nF + Ccable+ CHHT ; La t 35P H + Lcable+ LHHT
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 Ohm.
・ In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

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.

IM 12D08B02-01E

Application Doc. No.: IKE026-A10 P.5 to P.6

_

_

N

N

2-7. Control Drawing SC202S mA HART® Specifi cation (FM Non-incendive design)

onincendive design
FM C la ss I, D iv .2, G ro up A B C D , T 4 for a m b ie nt te m p . < 55 ° C
T6 for ambient temp. < 40°C
SC202S transmitter

+

G

Specifications 2-9

FM App roved

power supply

Voc ≦ 31 .5 V D C

+

-

Sensor
terminals 11-16
Max. cablelength: 60 mtr.
Cable dia. : 3…12 mm.

For electrical data:
see text below.

Classified Location Unclassified Location

onincendive design

FM C lass I, Div.2, Group ABCD , T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
SC202S transmitter

Functional
earth

+

G

Sensor
terminals 11-16
Max. cablelength: 60 mtr.
Cable dia.: 3…12 mm

For electrical data:
see text below .

Classified Location

Functional
earth

・ Electrical data of the SC202S.

- Supply circuit (terminals + and -):
Maximum input voltage Vmax = 31.5 V. Maximum input power P
Effective internal capacitance Ci = 22 nF Effective internal inductance Li = 35 μH

- Sensor input circuit (terminals 11 through 16):

Maximum output voltage Vt = 14.4 V. Maximum output current It = 10 mA.
Maximum allowed external capacitance Ca = 1.71 μF.
Maximum allowed external inductance La = 600 mH.

Load

Resistance

FM Approved

power supply

Voc ≦ 31.5 VDC

+

-

Ùnclassified Location

max = 1.2 W

・ 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.
Non-incendive field wiring may be installed in accordance with Article 501 of the National
Electrical Code.

・ Grounding shall be in accordance with Article 250 of the National Electrical code
・ In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

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

Application Doc. No.: IKE026-A10 P.7 to P.8

IM 12D08B02-01E

2-10 Specifications

_

_

_

_

2-8. Control Drawing of SC202S mA HART® Specification (CSA)

Sensor
terminals 11-16

Sensor
terminals 11-16

Intrin s ic a lly s af e d e s ign

CSA E x ia Class1, D iv.1, G rou p A B C D , T 4 for am bient te m p . < 55 °C
T 6 fo r am b ient t em p . < 4 0°C

transm itter

SC202S

+

G

For electrical data:
see text below.

Hazardous area Safe area

Intrin s ic a lly s af e d e s ign

CSA E x ia Class1, D iv.1, G ro u p A B C D , T4 for am b ient te m p . < 55 °C
T 6 for a m bient tem p . < 4 0 °C

SC202S transmitter

Functional
earth

Functional
earth

+

G

For electrical data:
see text below.

Hazardous area

Functional
earth

CSA certified

safety barrier or power supply
with Rint=300 :

(HART compatible)

Su it a b le v a lu e s a r e :

Vmax = 31.5 VoltDC
Imax = 100 mA

Load

Resistance

CSA certified
Power Supply
(HA R T compa t ib le )

+

Suit a b le va lu e s a r e :

Vmax = 31.5 VoltDC
Imax = 100 mA

Pmax = 1.2 Watt

Safe area

24 volts DC N ominal

Supply Voltage.

+

Output

Supply

・ Sensor is a thermocouples, RTD’s, passive resistive switch devices, or is CSA entity

approved and meet connection requirements.

・ Electrical data of the SC202S.

- Supply and output circuit (terminals + and -)

Maximum input voltage Vmax = 31.5 V. Maximum input current Imax = 100 mA.
Maximum input power Pmax = 1.2 W.
Effective internal capacitance Ci = 22 nF. Effective internal inductance Li = 35 P H.

- Sensor input circuit (terminals 11 through 16):

Maximum output voltage Voc = 14.4 V. Maximum output current Isc = 13 mA.
Maximum allowed external capacitance Ca = 59 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 diagram above. Installation should be in
accordance with Canadian Electrical Code, 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 Voc = 14.4 V. Maximum output current Isc = 13 mA.
Maximum allowed external capacitance Ca = 2.9 PF.
Maximum allowed external inductance La = 450 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.

IM 12D08B02-01E

2-9. Control Drawing of SC202S FF/PB Specification (IECEx)

Ex ia IIC
T4 for a mbient te mp. d 55 q C
Ui = 24 V or Ui = 17,5 V
Ii = 250 mA Ii= 380 mA
Pi = 1,2 W P i = 5,32 W

SC202S-F

or SC202S-P

-

+

Specifications 2-11

Sensor

Connections

Safe area

Apparatus

+

-

Safe area

I.S.

interfa ce

I.S.

certified

Terminator

+

Transm itter

Zone 0 or 1

Hazardous area

-

Transm itter

x Sensor(s) are of a passive type to be regarded as 'simple apparatus'.

x Electrical data of the SC202S-F & SC202S-P:

- Supply and output circuit:

Maximum input voltage Ui= 24 V
Maximum input current Ii= 250 mA

Maximum input power Pi= 1.2 W
Effective internal capacitance Ci= 220 pF;
Effective internal inductance Li= 0 H.

󳌤

or
FISCO field device
Maximum input voltage Ui= 17.5 V
Maximum input current Ii= 380 mA
Maximum input power Pi= 5.32 W
Effective internal capacitance Ci= 220 pF;
Effective internal inductance Li= 0 H.

I.S.

certified

Terminator

-

+

- Sensor input circuit:

Maximum output voltage Uo= 14.4 V; Maximum output current Io= 13 mA
Maximum allowed external capacitance Co= 59 nF
Maximum allowed external inductance Lo= 200 mH

x Any I.S. interface may be used that meets the following requirements:

Uo d 24 V
Io d 250 mA
Po d 1.2 W
Ca t 220 pF + Ccable; La t 0 H + Lcable

or

FISCO power supply
Uo d 17.5 V
Io d 380 mA
Po d 5.32 W
Ca t 220 pF + Ccable; La t 0 H + Lcable

x Electrical data of the SC202S-B & SC202S-D (Type of protection “n”)

- Supply and output circuit:

Maximum input voltage Ui = 32 V

Effective internal capacitance Ci = 220 pF; Effective internal inductance Li = 0 H.

- Sensor input circuit:

Maximum output voltage Uo= 14.4 V; Maximum output current Io= 13 mA
Maximum allowed external capacitance Co = 2.9 F
Maximum allowed external inductance Lo = 450 mH

IM 12D08B02-01E

2-12 Specifications

2-10. Control Drawing of SC202S FF/PB Specification (ATEX)

Ex ia IIC
T4 for ambient temp. d 55 qC
Ui = 24 V or Ui = 17,5 V
Ii = 250 mA Ii = 380 mA
Pi = 1,2 W Pi = 5,32 W

SC202S-F

or SC202S-P

-

+

Sensor

Connections

Safe area

Apparatus

+

-

Safe area

I.S.

interface

I.S.

certified

Terminator

+

Transmitter

Zone 0 or 1

Hazardous area

-

+

Transmitter

x Sensor(s) are of a passive type to be regarded as 'simple apparatus'.

x Electrical data of the SC202S-F & SC202S-P:

- Supply and output circuit:
Maximum input voltage Ui= 24 V
Maximum input current Ii= 250 mA
Maximum input power Pi= 1.2 W

Effective internal capacitance Ci= 220 pF;
Effective internal inductance Li= 0 H.
or
FISCO field device
Maximum input voltage Ui= 17.5 V
Maximum input current Ii= 380 mA
Maximum input power Pi= 5.32 W
Effective internal capacitance Ci= 220 pF;
Effective internal inductance Li= 0 H.

I.S.

certified

Terminator

-

- Sensor input circuit:
Maximum output voltage Uo= 14.4 V; Maximum output current Io= 13 mA
Maximum allowed external capacitance Co= 59 nF
Maximum allowed external inductance Lo= 200 mH

x Any I.S. interface may be used that meets the following requirements:

Uo d 24 V
Io d 250 mA
Po d 1.2 W

Ca t 220 pF + Ccable; La t 0 H + Lcable
or
FISCO power supply
Uo d 17.5 V
Io d 380 mA
Po d 5.32 W
Ca t 220 pF + Ccable; La t 0 H + Lcable

x Electrical data of the SC202S-B & SC202S-D (Type of protection “n”)

- Supply and output circuit:

Maximum input voltage Ui = 32 V

Effective internal capacitance Ci= 220 pF; Effective internal inductance Li= 0 H.

- Sensor input circuit:

Maximum output voltage Uo=14.4V; Maximum output current Io= 13 mA
Maximum allowed external capacitance Co = 2.9 F
Maximum allowed external inductance Lo = 450 mH

IM 12D08B02-01E

2-11. Control Drawing of SC202S FF/PB Specification (FM Intrinsically safe Entity)

Specifications 2-13

FM Approved
barrier

Voc (Vt) d 24 V
Ioc (It) d 250 mA
Poc (Pt) d 1.2 W
Ca t 220pF+ Ccable
La t 0 H + Lcable

FM Class I, DIV. 1, Group ABCD
T4 for ambient temp. d 55 qC

SC202S-F

or SC202S-P

-

+

+

-

I.S.

certified

Terminator

-

+

Transmitter

Sensor
Connections
Max. cablelength: 60 mtr.
Cable dia. : 3…12 mm.

Sensor

Connections

Terminator

-

+

Transmitter

I.S.

certified

Division 1

Unclassified Location

x

Sensor(s) are of a passive type to be regarded as 'simple apparatus', devices which

Classified Location

neither store nor generate voltages over 1.5 V, currents over 0.1 A, power over 25 mW or
energy over 20 PJ, or are FM Approvals entity approved and meet connection
requirements.

x Electrical data of the SC202S-F & SC202S-P:

- Supply circuit:

Maximum input voltage Vmax= 24 V
Maximum input current Imax= 250 mA

Maximum input power Pi= 1.2 W
Effective internal capacitance Ci = 220 pF;
Effective internal inductance Li = 0 PH.

- Sensor input circuit:

Maximum output voltage Vt= 14.4 V; Maximum output current It= 10 mA

Maximum allowed external capacitance Ca= 59.36 nF

Maximum allowed external inductance La= 340 mH

x Any FM Approved barrier may be used that meets the following requirements:

Voc or Vt d 24 V
Ioc or It d 250 mA
Poc or Pt d 1.2 W
Ca t 220 pF + Ccable; La t 0 PH + Lcable

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).
Associated apparatus connected to the barrier must not use or generate more than
250 Vrms or Vdc.

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

Ohm.

x In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

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.

IM 12D08B02-01E

2-14 Specifications

x The cable used to interconnect the devices needs to comply with the following
parameters:

Loop resistance R’: 15 … 150 /km; Inductance per unit length L’: 0,4 … 1 mH/km
Capacitance per unit length C’: 80 … 200 nF/km
(C’ = C’ line/line + 0,5 C’ line/screen if both line are floating)
(C’ = C’ line/line + C’ line/screen if the screen is connected to one line)
Length of spur cable: max. 30 m
Length of trunk cable: max. 1 km
Length of splice : max. 1 m

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.

Application Doc. No.: IKE027-A10 P.5 to P.6

IM 12D08B02-01E

2-12. Control Drawing of SC202S FF/PB Specification (FM Intrinsically safe FISCO)

Specifications 2-15

FM Approved
FISCO barrier

Voc (Vt) d17,5 V
Ioc (It) d380 mA
Poc (Pt) d5,32 W

+

-

FM Approved
Terminator
R = 90..100
C = 0..2,2 F

FM Class I, DIV. 1, Group ABCD
T4 for ambient temp. d 55 qC

SC202S-F

or SC202S-P

-

+

-

+

Transmitter

Sensor
Connections
Max. cablelength: 60 mtr.
Cable dia. : 3…12 mm.

Sensor

Connections

-

+

Transmitter

FM Approved
Terminator
R = 90..100
C = 0..2,2 F

Division 1

Unclassified Location

Classified Location

x Sensor(s) are of a passive type to be regarded as 'simple apparatus', devices which

neither store nor generate voltages over 1.5 V, currents over 0.1 A, power over 25 mW or
energy over 20 PJ, or are FM Approvals entity approved and meet connection
requirements.

x Electrical data of the SC202S-F & SC202S-P:

- Supply circuit: Vmax = 17.5 V; Imax = 380 mA; Pi = 5.32 W; Ci = 220 pF; Li = 0 PH.

- Sensor input circuit: Vt = 14.4 V; It = 10 mA; Ca = 59.36 nF; La = 340 mH

x Any FM Approved FISCO barrier may be used that meets the following requirements:

Voc or Vt d 17.5 V; Ioc or It d 380 mA; Poc or Pt d 5.32 W
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).
Associated apparatus connected to the FISCO barrier must not use or generate more
than 250 Vrms or Vdc.

x Resistance between FISCO Intrinsically Safe Ground and earth ground must be less than

1.0 Ohm.

x In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

x The FISCO concept allows the interconnection of several I.S. apparatus not specifically

examined in such combination. The criterion for such interconnection is that the voltage
(Vmax), the current (Imax) and the power (Pi) which I.S. apparatus can receive and remain
intrinsically safe, considering faults, must be equal to or greater that the voltage (Voc, Vt),
the current (Ioc, It) and the power (Poc, Pt) which can be providede by the FM approved
FISCO barrier. In addition, the maximum unprotected residual capacitance (Ci) and
inductance (Li) of each apparatus (other than the terminator) connected to the Fieldbus
must be less than or equal to 5nF and 10 H respectively.

IM 12D08B02-01E

2-16 Specifications

x In each I.S. Fieldbus segment only one active source, normally the FM Approved FISCO

barrier, is allowed to provide the necessary power for the Fieldbus system. All other
equipment connected to the bus cable has to be passive (not providing energy to the
system), except to a leakage current of 50A for each connected device. Seperately
powered equipment needs a galvanic isolation to insure that the I.S. Fieldbus circuit
remains passive.

x The cable used to interconnect the devices needs to comply with the following
parameters:

Loop resistance R’: 15 … 150 /km; Inductance per unit length L’: 0,4 … 1 mH/km
Capacitance per unit length C’: 80 … 200 nF/km
(C’ = C’ line/line + 0,5 C’ line/screen if both line are floating)
(C’ = C’ line/line + C’ line/screen if the screen is connected to one line)
Length of spur cable: max. 30 m
Length of trunk cable: max. 1 km
Length of splice : max. 1 m

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.

Application Doc. No.: IKE027-A10 P.7 to P.8

IM 12D08B02-01E

Specifications 2-17

p

2-13. Control Drawing of SC202S FF/PB Specification (FM Non-incendive Entity)

FM Class I, DIV. 2, Group ABCD

FM Approved
Power Supply

Voc d 32 VDC

+

-

FM Approved
Terminator
R = 90..100
C = 0..2,2 F

T4 for ambient temp. d 55 qC
T6 for ambient tem

SC202S-B

or SC202S-D

. d 40 qC

-

+

-

+

Transmitter

Sensor
Connections
Max. cablelength: 60 mtr.
Cable dia.: 3…12 mm.

Sensor

Connections

-

+

Transmitter

FM Approved
Terminator
R = 90..100
C = 0..2,2 F

Division 2

Unclassified Location

x

Sensor(s) are of a passive type to be regarded as 'simple apparatus', devices which

Classified Location

neither store nor generate voltages over 1.5 V, currents over 0.1 A, power over 25 mW or
energy over 20 J, or are FM Approvals entity approved and meet connection
requirements.

x Electrical data of the SC202S-B & SC202S-D:

- Supply circuit: Vmax= 32 V; Pi= 1.2 W; Ci= 220 pF; Li= 0 PH

- Sensor input circuit: Vt= 14.4 V; It= 10 mA; Ca= 1.71 F; La= 600 mH

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)

x Grounding shall be in accordance with Article 250 of the National Electrical code.
x In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

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

Application Doc. No.: IKE027-A10 P.9

IM 12D08B02-01E

2-18 Specifications

p

2-14. Control Drawing of SC202S FF/PB Specification (FM Non-incendive FNICO)

FM Class I, DIV. 2, Group ABCD

FM Approved

Power Supply

Voc d 32 VDC

T4 for ambient te mp. d 55 qC
T6 for ambient tem

SC202S-B

or SC202S-D

FM Approved
Terminator

+

-

R = 90..100
C = 0..2,2 F

. d 40 qC

-

+

-

+

Transmitter

Sensor
Connections
Max. cablelength: 60 mtr.
Cable dia.: 3…12 mm.

Sensor

Connections

-

+

Transmitter

FM Approved
Terminator
R = 90..100
C = 0..2,2 F

Division 2

Unclassified Location

x

Sensor(s) are of a passive type to be regarded as 'simple apparatus', devices which

Classified Location

neither store nor generate voltages over 1.5 V, currents over 0.1 A, power over 25 mW or
energy over 20 PJ, or are FM Approvals entity approved and meet connection
requirements.

x Electrical data of the SC202S-B & SC202S-D:

- Supply circuit: Vmax= 32 V; Pi= 5.32 W; Ci= 220 pF; Li= 0 PH

- Sensor input circuit: Vt= 14.4 V; It= 10 mA; Ca = 1.71 F; La = 600 mH

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).
Non-incendive field wiring may be installed in accordance with Article 501.4(B)(3)

x Grounding shall be in accordance with Article 250 of the National Electrical code.
x In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.

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

Application Doc. No.: IKE027-A10 P.10

IM 12D08B02-01E

2-15. Control Drawing of SC202S FF/PB Specification (CSA)

CSA Ex ia Class I, DIV. 1, Group ABCD
T4 for ambient temp. d 55 qC

Ui = 24 V or Ui = 17,5 V
Ii = 250 mA Ii = 380 mA
Pi = 1,2 W Pi = 5,32 W

SC202S-F

or SC202S-P

-

+

Specifications 2-19

Sensor

Connections

Safe area

Apparatus

+

-

Safe area

I.S.

interface

I.S.

certified

Terminator

+

Transmitter

Zone 0 or 1

-

Transmitter

-

+

I.S.

certified

Terminator

Hazardous area

x Sensor(s) are a thermocouple, RTD's, passive resistive switch devices, or is CSA entity

approved and meet connection requirements.

x Electrical data of the SC202S-F & SC202S-P:

- Supply and output circuit:

Maximum input voltage Ui = 24 V
Maximum input current Ii = 250 mA

Maximum input power Pi = 1.2 W
Effective internal capacitance Ci = 220 pF; Effective internal inductance Li = 0 H.
or
FISCO field device
Maximum input voltage Ui = 17.5 V
Maximum input current Ii = 380 mA
Maximum input power Pi = 5.32 W
Effective internal capacitance Ci = 220 pF;
Effective internal inductance Li = 0 H.

- Sensor input circuit:

Maximum output voltage Uo = 14.4 V; Maximum output current Io = 13 mA

Maximum allowed external capacitance Co = 59 nF

Maximum allowed external inductance Lo = 200 mH

x Any CSA approved I.S. interface may be used that meets the following requirements:

Uo d 24 V
Io d 250 mA
Po d 1.2 W
Co t 220 pF + Ccable; Lo t 0 H + Lcable

or

FISCO field device
Uo d 17.5 V
Io d 380 mA
Po d 5.32 W

Co t 220 pF + Ccable; Lo t 0 H + Lcable
Installation should be in accordance with Canadian Electrical Code, Part I or CEC, Part I.
Maximum safe area voltage should not exceed 250 Vrms.

x Electrical data of the SC202S-B & SC202S-D (non-incendive):

For Class I, Div.2, Group ABCD the CSA approved I.S. interface is not required, and the
sensor input circuit is non-incendive having the parameters:

Maximum output voltage Uo = 14.4 V; Maximum output current Io = 13 mA

Maximum allowed external capacitance Co = 2.9 F

Maximum allowed external inductance Lo = 450 mH

IM 12D08B02-01E

2-20 Specifications

IM 12D08B02-01E

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
When the instrument with Suffix Code "-B,-N,-D" is used, take measures so that the display window is

not exposed to direct sunlight

• 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 optinal bracket, refer to Fig. 3-2a.

• Panel mounting using two (2) self-tapping screws, refer to Fig. 3-2b.

• 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 (nominal pipe diameter JIS 50A)
Unit: mm (inch)

Panel mounting
bracket

180

(7)

(7.95)

202

(6.4) (6.1)

162

50

(2)

130

(5.1)

155

30

(1.2)

Panel thickness

1 to 10

(0.04 to 0.39)

(1.2)

30

60

(2.36)

Hood (Option)
Option code : / H

115

Grounding terminal
(M4 screw)

9

(0.35)

42

(1.65)

34

(1.3)

56±0.2

(2.20)

(2.7)

68

Sensor cable inlet
cable gland (Pg13.5)

M6 screw (32 )

Transmission signal cable inlet
Cable gland : Pg13.5

Adapter

G1/2 screw (/AFTG)
1/2 NPT screw (/ANSI)

Fig. 3-1. Housing dimensions and layout of glands

77

(3)

(4.5)

(1.26) depth

1.eps

49

(1.93)

2.eps

Approx.
55

(2.2)

156

(6.14)

121

(4.76)

+1.1
0

185

205

80

(3.15)

3.9

(0.15)

38

(1.5)

PANEL CUTOUT

+1.1

173

0

138

(5.43)

(6.81)

Fig. 3-2a. Panel mounting diagram

IM 12D08B02-01E

(7.28)

(8.07)

5.eps

3-2 Installation and wiring

Unit: mm (inch)

+1
0

+1

0

18.5

SPACING PANEL CUTOUT

(0.72)

PANEL CUTOUT

Fig. 3-2b. Panel mounting using two (2) self-tapping screws

56

(2.20)

2-Ø6.5

(0.26)

200

(7.87)

4-Ø10

(0.4)

(3)

77

115

70

(2.75)

(4.5)

Figure 3-3. Wall and pipe mounting diagram

3.5
(0.14)

Pipe mounting

(Vertical)

Unit: mm (inch)

Pipe mounting

(Horizontal)

Nominal 50 A (O.D. Ø60.5 mm)

(2 inch pipe)

4.eps

Figure 3-4. Internal view of EXA wiring compartment

IM 12D08B02-01E

Installation and wiring 3-3

3-2. Preparation

mAmA

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 6 to 12 mm (0.24 to 0.47 inches).

Grounding
terminal

Figure 3-5. Glands to be used for cabling

Power/Output
cable gland

Sensor
cable gland

IM 12D08B02-01E

3-4 Installation and wiring

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

Y

HOLD

YOKOGAWA

MODE

TEMP

AUT.CAL

12

0

180100

>

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 50 m 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 capacitance 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 capacitance 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.

IM 12D08B02-01E

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

WARNING

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 mm2 and an
outside diameter of 6 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

mA

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.

11

1

6

2

5

3

4

16

white

12

brown
green

13

14

yellow

15

grey
pink

Fig. 3-7. Connection diagrams

IM 12D08B02-01E

3-6 Installation and wiring

3-5. Sensor wiring

Refer to figure 3-9, which includes drawings that outline sensor wiring.
For the SC4AJ, SC8SG and SC210G sensors, see Appendix 2.

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-LH 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.

CONDUCTIVITY / RESISTIVITY TRANSMITTER

11 TEMPERATURE

12 TEMPERATURE

13 CELL

14 CELL

15 CELL

16 CELL

1

2

1

2

BROWN

BROWN

YELLOW / GREEN

RED

11 TEMPERATURE

12 TEMPERATURE

13 OUTER ELECTRODE

14 OUTER ELECTRODE

15 INNER ELECTRODE

16 INNER ELECTRODE

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

Figure 3-9. Sensor wiring diagrams

SX42-SX . . - . F SENSORS

IM 12D08B02-01E

Installation and wiring 3-7

3-6. 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.

11 12

t

2-electrode configuration

Figure 3-10. Connection diagram for other sensors

Figure 3-11. Terminal identification label

13

14 15 16

11 12

t

4-electrode configuration

14 15 16

13

3-6-1. 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).

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

IM 12D08B02-01E

3-8 Installation and wiring

16 15

17

17

1314141615

13 14 14

12

12

11

11

11 Red

12 Blue

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

15 Core 16 Screen

White Co-axial cable

14 Overall Screen

13 Core 17 Screen
Brown Co-axial Cable

Brown

Screen

WF10 Cable

A

Red

D

Blue

C

E

B

Overall
shield

White

TRANSMITTER / CONVERTER

11

Thermistor (Temperature sensor)

12

17

Secondary Coil

13

15

Primary Coil

16

Ground (Shield)

14

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

>Connections differential 4-electrode

temp

A-15

B-16

C-13

D-14

E-11

F-12

S-3 or 63

IM 12D08B02-01E

Installation and wiring 3-9

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.

Red

11

Blue

12

Black

14

White

15

16

Brown

13

17

IM 12D08B02-01E

Operation 4-1

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
This menu is used to set such values as the output ranges and hold features. It also gives access to the

in the lower right of the display board.

*

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

Maintenance

Commissioning

mAmA

Service

(Access to coded entries
from the commissioning level)

Can operate with front panel shut Need to open front panel cover to operate

Measurement Mode

MODE key

Maintenande Mode Commissioning Mode

CALIB(ration)

NO key

DISP.1

NO key

DISP.2

NO key

HOLD

NO key

· Select desired mode and press YES

· The MODE key is used as a "Cancel and Return to Measurement Mode" escape key

Routine Function Chapter

CALIB

DISP. 1, 2

HOLD

*OUTP

*HOLD

*TEMP. 1, 2

*SERV Fine tune the specialized functions of the transmitter 5

* key

*OUTP Output Range Setting

NO key

*HOLD HOLD Settting

NO key

*TEMP.1 Temperature Setting

NO key

*TEMP.2 Temperature Setting

NO key

Service Mode

*SERV Service Mode

NO key

Calibration with a standard solution or sample

Read auxiliary data or set message display

Switch hold on/off (when activated)

Adjust the output range

Activate the hold function

Select method of temperature compensation

6

4

5

5

5

5

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.

IM 12D08B02-01E

4-2 Operation

Output hold flag

Main display

Message display

Key prompt flags

Selection keys
YES : Accept setting
NO : Change setting

Adjustment keys
> : Choose digit to

adjust
^ : Adjust digit
ENT : Confirm change

HOLD FAIL

YES N O

NO MODEYES

ENT

Broken line indicates area
that can be seen through
front cover

Fail flag

MEASURE
CAL
DISPLAY
HOLD

ENT

MODE

Menu pointer flags

Units

OUTPUT
SET HOLD
TEMP.
SERVICE

Commissioning
function menu

Commissioning
mode access key

Measure/Maintenance
mode key

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 ( )

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.

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

firm 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.

IM 12D08B02-01E

Operation 4-3

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 *SERV 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 (*TEMP.2) is set.

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

IM 12D08B02-01E

4-4 Operation

4-5. Display functions

Sequence for resistivity function is similar to this conductivity example.

Display Functions

(Sequence for resistivity function equals this conductivity example).

cell constant

Reference
temperature

DISP.1

or

DISP.2

Software
release

number

NO

MODE

YES

NO

NO





S/cm

S/cm

(See Calibration

YES

menu Chapter 6)

Actual

YES NO

NO

YES NO

NO

YES NO



S/cm



S/cm



S/cm

mA

YES

NO

YES NO

NO

YES NO

NO

HOLD FAIL

YES N O

NO MODEYES

ENT

YES NO



S/cm

NO



S/cm

NO

YES

NO

Temperature

compensation

NO

YES NO

NO



S/cm



S/cm

YES

2ndcompensated

YES NO



S/cm

w/w %

value



S/cm

MODE

MEASURE
CAL
DISPLAY
HOLD

(See Hold

YES

menu Chapter 5.1)

OUTPUT
SET HOLD
TEMP.
SERVICE

Process

tempe-

rature

Uncompensated if
USP is enabled in

serv code 57

mA

Current

YES NO

NO

YES NO

NO

YES NO







S/cm

S/cm

S/cm

output 1

ENT

DISP.1

Press YES to fix

the selected second

line of display

IM 12D08B02-01E

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

mAmA

MODE

FAIL

MEASURE

OUTPUT
SET HOLD
TEMP.
SERVICE

NO MODEYES

ENT

MODE

MW.cm

YES NO

NO

CALIBRATE

NO

NO

NO

MW.cm

YES NO YES NO

YES

MW.cm

NO

YES

HOLD

HOLD

NO

M½.cm

YES NO

YES

M½.cm

MEASURE

IM 12D08B02-01E

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.

*OUTP : mA output is set as default to 0-1 mS/cm or 0-19.99 M·cm.
For enhanced resolution in more stable measuring processes, it may be desirable to

select for example 5-10 S/cm range.

mA

*HOLD : The EXA SC202 transmitter has the ability to “HOLD” the output during maintenance

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

*TEMP.1, 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 solu-

tions 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.

*SERV : 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 12D08B02-01E

5-2-2. Range

Parameter setting 5-3

MODE

MEASURE
CAL
DISPLAY
HOLD

NO MODEYES

ENT

OUTPUT
SET
TEMP.
SERVICE

HOLD

YES

NO

YES

NO

YES

NO

YES NO

NO

YES

mA

NO

mA

NO

NO

ENT

NO

YES NO

ENT

IM 12D08B02-01E

5-4 Parameter setting

5-2-3. HOLD

mA

MODE

YES N O

NO

YES N O

NO

MEASURE
CAL
DISPLAY
HOLD

YES

OUTPUT
SET HOLD
TEMP.
SERVICE

NO

YES N O

HOLD

ENT

HOLD

ENT

HOLD

YES

NO

IM 12D08B02-01E

YES N O

NO

YES N O

NO

YES

YES

ENT

HOLD

YES

YES NO

YES

HOLD

NO

NO

Set HOLD "fixed value"

YES

YES NO

HOLD active
last measured
value.

NO

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 60746-3 with Tref = 25 °C

TKtα TKtα TKtα

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

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:

Kt - K
=
T - T

ref

K

ref

x

100

ref

In which:
 = Temperature compensation factor

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

= Reference temperature (°C)

ref

K

= Conductivity at T

ref

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.

IM 12D08B02-01E

5-6 Parameter setting

5-2-5. Temperature compensation selection

MODE

MEASURE
CAL

OUTPUT

DISPLAY

SET HOLD

HOLD

TEMP.
SERVICE

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

>

mA

mA

YES N O

NO

YES N O

NO

YES NO

NO

YES N O

NO

YES N O

YES

YES

YES N O

NO

YES N O

NO

YES NO

YES

ENT

YES



S/cm

ENT

Briefly

*WAIT*

TEMP.1

or

TEMP.2

IM 12D08B02-01E

NO

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.

MODE

MEASURE
CAL
DISPLAY

HOLD

OUTPUT
SET HOLD
TEMP.
SERVICE

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

mA

mA

NO

YES NO

NO

YES N O

NO

YES N O

NO

YES NO

NO

YES NO

YES

Example: Service Code 01

Select main parameter

for SC

for RES

With the >, ,ENT keys

>

ENT

ENT

ENT

ENT

ENT

ENT

ENT

IM 12D08B02-01E

5-8 Parameter setting

5-3. Service Codes

Don't set or input service code numbers other than the code numbers defined in this manual. Setting an
undefined service code may make the transmitter malfunction.
When an undefined service code is input by some accident, push the MODE key and escape from the
service level.

5-3-1. Parameter specific functions

Code 01 *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 02 *4.ELEC Choose the required sensor type. Normally conductivity and/or resistivity

measurements 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 03 *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 04 *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.

13 14 15 16

Code 05 *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.

IM 12D08B02-01E

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 1.000 cm

0.10xC

1.00xC

10.0xC

100.xC

0.01xC

Press YES to select a factor

RESET? YES to confirm

04 *AIR Zero calibration Zero calibration with dry cell connected

*START Press YES to confirm selection

*”WAIT”

*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

multiplying factors on the second display.

Use >, ^, ENT keys to adjust MAIN digits

, NO to cancel

Press YES to start, after briefly displaying

0.10xC

-1

*NOTE:
For Code 03: 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.
For Code 04: The temperature compensation of NaCl should be selected to confirm zero offset after

*AIR operation.

IM 12D08B02-01E

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 12D08B02-01E

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 (PB36NTC) 2

Pt100 3

8k55 (8.55kNTC) 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 12D08B02-01E

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, 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

compensation 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 (T1 - T5) 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 12D08B02-01E

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 12D08B02-01E

5-14 Parameter setting

5-5. mA output functions

mA

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 (21 mA or 3.6 mA when HART or distributor comm. is
non-used, 3.9 mA when HART or distributor comm. is used). 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 21 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.

Table 5-3.

CONDUCTIVITY (S/cm)

1,000

800

600

400

200

0

Output in %

CONCENTRATION (%)

25

20

15

10

5

0

Output in %

Fig. 5-1. Linearization of output

Example: 0-25% Sulfuric acid

Code

Output

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

100 80 60 40 20 0

100 80 60 40 20 0

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

4-20 mA % H2SO4

Service

code 55

mS/cm

Service

code 35

Default

mS/cm

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 12D08B02-01E

Parameter setting 5-15

Code Display Function Function detail X Y Z Default values

mA

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

*95% may be skipped, and a linear interpolation

*100% will take place.

36-39 Not used

IM 12D08B02-01E

5-16 Parameter setting

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 to 13 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)

linear 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 M·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.

IM 12D08B02-01E

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 k

*E6.LIM E6 limit setting Minimum conductivity value 1.000 S

(Maximum resistivity value) 1.000 M

55 *% Display mA in w/w% mA-range displayed in w/w% off 0 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 S/cm or M·cm 1

Display fixed to XX.XX S/cm or M·cm 2 (2)

Display fixed to XXX.X S/cm or M·cm 3

Display fixed to X.XXX mS/cm or k·cm 4

Display fixed to XX.XX mS/cm or k·cm 5

Display fixed to XXX.X mS/cm or k·cm 6

Display fixed to XXXX mS/cm or k·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 12D08B02-01E

5-18 Parameter setting

5-7. Communication setup

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

mA

the output. The communication can be set to HART® or to PH201*B distributor
(see Appendix 2).

*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).

mA

Code 61 *HOUR
*MINUT
*SECND
*YEAR
*MONTH
*DAY

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

5-8. General

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

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

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 Not used.

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 12D08B02-01E

Parameter setting 5-19

Code Display Function Function detail X Y Z Default values

Communication

60 *COMM. Communication Set HART® communication Off 0 1.0 On

mA

Set HART® 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

mA

*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 Not used.

IM 12D08B02-01E

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 5-4, 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 SC72 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 (IEC 60746-3)

Weight % mg/kg Conductivity

0.001 10 21.4 S/cm

0.003 30 64.0 S/cm

0.005 50 106 S/cm

0.01 100 210 S/cm

0.03 300 617 S/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 k·cm (if G = S/cm)

Example:

0.001 weight %
R = 1000/21.4 = 46.7 k·cm

IM 12D08B02-01E

6-2 Calibration

6-2. Calibration procedure

NO MODEYES

MODE

YES

MODE

Press the MODE key.

The legend CALIB

appears, and the YES/NO

MEASURE
CAL

DISPLAY
HOLD

ENT

NOYES

NOYES

key prompt flags flash.

Put the sensor in standard
solution. Press YES.

After the indication is stable, set the value
using the >,,ENT key.

>

ENT

ENT

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

>

ENT

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

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 12D08B02-01E

6-3. Calibration with HOLD active

Calibration 6-3

HOLD

HOLD

NO MODEYES

MODE

YES

MODE

Press the MODE key.

The legend CALIB

appears, and the YES/NO

MEASURE
CAL
DISPLAY
HOLD

ENT

NOYES

NOYES

HOLD

key prompt flags flash.

Put the sensor in standard
solution. Press YES.

After the indication is stable,

using the >,,ENT key.

HOLD

ENT

set the value

>

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

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

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

ENT

YES.

HOLD

>

HOLD

HOLD

ENT

NOYES

NOYES

IM 12D08B02-01E

Maintenance 7-1

7. MAINTENANCE

7-1. Periodic maintenance for the EXA 202 transmitter

The EXA202 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.

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-

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).

Rv

Rcel

electrode conductivity measuring system. If an apparent increase in cell constant occurs cleaning
the cell will restore accurate measurement.

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

result.

IM 12D08B02-01E

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 12D08B02-01E

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 (S/cm,

in code 03. mS/cm, k·cm or M·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 con-

tact 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

mA

E18 Table values make no sense Wrong data programmed Reprogram

mA

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 12D08B02-01E

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 S/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 (CO

2) 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
measuring 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 S/cm. = 0.568 M·cm.

IM 12D08B02-01E

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

3,5

3

2,5

2

1,5

1

microSiemens/cm

0,5

Fig. 9-1.

0

0 25 50 75 100

Temperature in °C

IM 12D08B02-01E

10. SPARE PARTS

See Customer Maintenance Parts List.

Spare Parts 10-1

IM 12D08B02-01E

11. APPENDIX 1

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

mAmA

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

Appendix 1-1

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 12D08B02-01E

1-2 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 100 ppb

selection 1 0 0.0116 S 0.0228 S 0.0472 S 0.0911S 0.450 S

10 0.0230 S 0.0352 S 0.0631 S 0.116 S 0.565 S

20 0.0419 S 0.0550 S 0.0844 S 0.145 S 0.677 S

30 0.0710 S 0.085 S 0.115 S 0.179 S 0.787 S

40 0.1135 S 0.129 S 0.159 S 0.225 S 0.897 S

50 0.173 S 0.190 S 0.220 S 0.286 S 1.008 S

60 0.251 S 0.271 S 0.302 S 0.366 S 1.123 S

70 0.350 S 0.375 S 0.406 S 0.469 S 1.244 S

80 0.471 S 0.502 S 0.533 S 0.595 S 1.373 S

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

selection 2 0 0.0116 S 0.0229 S 0.0502 S 0.0966S 0.423 S

10 0.0230 S 0.0337 S 0.0651 S 0.122 S 0.535 S

20 0.0419 S 0.0512 S 0.0842 S 0.150 S 0.648 S

30 0.0710 S 0.0788 S 0.111 S 0.181 S 0.758 S

40 0.113 S 0.120 S 0.149 S 0.221 S 0.866 S

50 0.173 S 0.178 S 0.203 S 0.273 S 0.974 S

60 0.251 S 0.256 S 0.278 S 0.344 S 1.090 S

70 0.350 S 0.356 S 0.377 S 0.439 S 1.225 S

80 0.471 S 0.479 S 0.501 S 0.563 S 1.393 S

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

selection 3 0 0.0116 S 0.0272 S 0.0565 S 0.0963S 0.288 S

10 0.0230 S 0.0402 S 0.0807 S 0.139 S 0.431 S

20 0.0419 S 0.0584 S 0.108 S 0.185 S 0.592 S

30 0.0710 S 0.0851 S 0.140 S 0.235 S 0.763 S

40 0.113 S 0.124 S 0.181 S 0.289 S 0.938 S

50 0.173 S 0.181 S 0.234 S 0.351 S 1.12 S

60 0.251 S 0.257 S 0.306 S 0.427 S 1.31 S

70 0.350 S 0.357 S 0.403 S 0.526 S 1.52 S

80 0.471 S 0.481 S 0.528 S 0.654 S 1.77 S

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 12D08B02-01E

Appendix 1-3

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

mA

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.

mA

• 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 Appendix 1-4 & 1-5 a reference list for the configuration of the SC202 is shown.

IM 12D08B02-01E

1-4 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.CK 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.

mA

32 *BURN 0 No Burn

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

IM 12D08B02-01E

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) k

*E6.LIM 1.000 S

(1.0) M

55 *0 % 0 Off

100% 100.0

56 *DISP 0 Auto ranging (SC)

(2) (xx.xxM·cm) (RES)

57 *USP 0 Off

Communication

60 *COMM. 1.0 On/write ena.

mA

*ADDR. 00 00

61 *HOUR

mA

62 *ERASE

General

70 *LOAD

Test and setup mode

80 *TEST

Appendix 1-5

IM 12D08B02-01E

1-6 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 (S/cm,

in code 03. mS/cm, k·cm or M·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 con-

tact 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

mA

E17 Output span too small Incorrect configuration by user Reprogram

E18 Table values make no sense Wrong data programmed Reprogram

mA

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 12D08B02-01E

Appendix 1-7

11-8. Device Description (DD) menu structure

mA

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 Terminal (HHT). For detailed operating instructions, refer to the HHT user’s manual and the
on-line help structure. For menu structure of HHT 375, see next page.

Level 1 menu Level2menu

Process variab.

Diag/Service

Basic Setup

Detailed Setup

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

Status
Hold

Logbook

Ta g
Device informat.

Param. Specific.

Level 3 menu

Error status
Hold on/off
Hold enable/disable

Hold type
Hold value

Logbook conf.

Logbook 1
Logbook 2

Date
Descriptor
Message
Write protect
Manufacture
device id

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

Level4 menu Level 5 menu

Event1...event64

Rec.1...50

Rec.1...50

ON LINE MENU

Device setup

Primary value
Analog output
Lower rangeval.
Upper rangeval.

Review

Temp. Specific.

Temp. compens.

Output function

User Interface

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

Temp.sensor
Temp. unit

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

mA function
Burn function

mA-Table

Error programming

Display

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

Table 0%...100%

Error 1...Error 13

Auto return
E5 limit
E6 limit
Weight 0%
Weight 100%
Display format
USP
Passcode

Maintenance
Commissioning
Service

IM 12D08B02-01E

1-8 Appendix

Menu structure for HHT 375 shown below.

ON LINE MENU

1. Device setup

2. PV

3. AO1

4. LRV

5. URV

Note:
“2. PV” means
Primary value
“3. AO1” means
Analog output
“4. LRV” means
Lower rangeval
“5. URV” means
Upper rangeval

Level 1 menu Level

1. Process variables

2. Diag/Service

3. Basic setup

4. Detailed setup

1. PV

2. Uncomp

3. Temp

4. PV % rnge

1. Status

2. Hold

3. Logbook

4. Loop test

1. Tag

2. Device information

1. Param. specific

2

menu

Level 3 menu

Note:
“Uncomp” means uncompensated value.
“PV % rnge” means % of output range.

1. Hold status

2. Hold fnc.

3. Hold type

1. Logbook conf.

2. Logbook1

3. Logbook2

1. Date

2. Descriptor

3. Message

4. Write protect

5. Manufacturer

6. Dev id

1. PV unit

2. Electrodes

3. CC nom

4. CC act

5. Pol. check

Level 4menu Level 5menu

1. Powerup

2. Powerdwn

3. Defaults

4. Lg. Erased

5. Low range

6. High range

7. Hold on

8. Hold off

9. Error on
Error off
Temp. adj
Cell const
Air cal
Calibrate
Ref. temp
Temp. coef1
Matrix
Temp. coef2

5. Review

2. Temp. specific

3. Temp. compensation

4. Output function

5. User interface

1. Model

2. Manufacturer

3. Distributor

4. Tag

5. Descriptor

6. Message

7. Date

8. Dev id

9. Write protect
Universal rev
Fld dev rev
Software rev
Hardware rev
Poll addr
Num req preams

1. Temp. sens

2. Temp. unit

1. Ref. Temp

2. TC1 type

3. TC2 type

4. Matrix table

1. mA func.

2. Burn func.

3. mA-table

1. Error prog.

2. Display

Err.1···Err.13

1. Auto. Ret

2. E5 lim.

3. E6 lim.

4. Percent

5. Fmt

6. USP

7. Passcodes

Note:
“Fmt” means displayed decimal point.

1. Maintenance

2. Commissioning

3. Service

(Note):HART protocol DD files can be downloaded by following URL.

http://www.yokogawa.com/an/download/an-dl-fieldbus-001en.htm

IM 12D08B02-01E

Appendix 2-1

12. APPENDIX 2

12-1. Preface

Feasible combinations of the SC202G conductivity transmitters with different styles of the PH201G dis­tributor are listed in the table below. The distributor has the usual distributor functions (supply power to
transmitter, receive current output from transmitter, and provide analog output) as well as contact output
functions (maintenance, wash and fail status signals). Since the two transmitters provide different digital
signals to control the distributor contact outputs, two distributor styles are provided for compatibility. The
SC202G is not intrinsically safe (explosionproof), so never install it in a hazardous area.

Conductivity
transmitter

SC202G

Use of Distoributor PH201G

No use of contact output

Style A & Style B possible Only Style B possible

Use of contact output

Refference

Non-Explosionproof type

T1.eps

For information about instruments related to the SC202G, SC202S, refer to the following Instruction
Manuals.

Manual Name IM No. Instruments mentioned

Conductivity Sensor IM 12D08F03-02E SC4AJ

PH201G distributor (Style B) IM 19B01E04-02E PH201G (Style B) Distributor
SDBT disributor IM 01B04T01-02E SDBT
SDBS disributor IM 01B04T02-02E SDBS
Attachment rack instrument IM 1B4F2-01E Instruments for rack attachment

IM 12D08G02-01E SC8SG
IM 12D08G03-01E SC210G

IM 12D08B02-01E

2-2 Appendix

12-2. Wiring diagrams

1. Example of Non-Explosionproof System (a) SC210G-A or SC210G-B

SC210G–A, SC210G–B
Conductivity sensor

T1 11

T1

T2 12

T2

C1 14

C1

C2 15

C2

*1

SC202G
Conductivity transmitter

Temper­ature
sensor

Electrode

+
–

G

13

16

11
12
13
14
15
16

*3 (100 or less)

PH201G (Style B)
Dedicated distributor for EXA202

*2

A(+)
B(

bad

Ground

HOLD FAIL

Relay contacts

(b) SC4AJ, SC8SG

SC4AJ, SC8SG
Conductivity sensor

*1

SC202G
Conductivity transmitter

11

11

Temperature

12

sensor

12

13

13

14

14

Conductivity

15

sensor

15

16

16

*1 : This cable is specified by the additional code of an conductivity sensor.
*2 : Use a two-conductor shielded cable of OD 6 to 12mm.
The cable length is : Max. 2000m (also the minimum operating voltage of conductivity
transmitter must be obtained)
*3 : Conduct grounding without fail on the conductivity transmitter
(Grounding reistance : 100 ½ or less)

2. Example of Intrinsically Safe Explosionproof System (a) SC210G-A or SC210G-B

SC210G-A,SC210G-B
Conductivity sensor

T1

T1

T2

T2

C1

C1

C2

C2

*1

SC202S
Conductivity transmitter

11
12
13
14
15
16

11
12
13
14
15
16

Temper­ature
sensor

Electrode

+

­G

*2

C
D

–)

F

H

c

Safety Barrier

+

Output

–

(1 to 5V DC)

+

Output

–

(1 to 5V DC)

SDBT distributor

*2

1(+)
2(

Distributor

+

Output

A

–

B
F
H

(1 to 5V DC)

+

Output

–

(1 to 5V DC)

F08.EPS

F09.EPS

–)

Output

Ground
to earth

*1: This cable is specified by the additional code of an conductivity sensor.
*2: Use two-wire cable with OD (Outside Diameter) of 6 to 12 mm.

(b) SC4AJ, SC8SG

SC4AJ, SC8SG
Conductivity sensor

*1

SC202S
Conductivity transmitter

11

11

12
13
14
15
16

Temperature
sensor

12
13
14

Conductivity
sensor

15
16

*1 : This cable is specified by the additional code of an conductivity sensor.

F09.EPS

IM 12D08B02-01E

F007-1.eps

Appendix 2-3

Cables, terminals and glands

The SC202 is equipped with terminals suitable for the connection of finished cables in the O.D. range:
6 to 12 mm. The glands will form a tight seal on cables with an outside diameter in the range of 6 to 12
mm. Requirement of connecting with external instruments shown below.

Terminal for pin cable terminal

Crimp contact
for cable
Usable contact

Torque for fixing
Example of
crimp contact

Note: Other crimp contact may be required , depending on core-cable diameter .

*

2.5mm or less

Pin-shaped terminal

Pin-shaped crimp contact
with sleeve insulator
max. 2.5 mm

0.5 N m or less
Weidmuller Co., Ltd. made:

*

H0.34/10, H0.5/12, H1/12, H1.5/12S

8.3mm or less

Ring-shaped terminal

Screw terminal (option /TB)

Ring-shaped or fork-shaped
crimp contact
Crimp contact shown as the figures
under this table, which meets M3 screw

1.35 N m (recommended)
JST, Mfg. Co., Ltd. made:
VD1.25-3 (Ring shape),
VD1.25-S3A (Fork shape)

8.3mm or less

Fork-shaped terminal

Connection terminal shown below when /TB option specified.

-

G+ 161412

151311

T3.2E.eps

F3.7.EPS

IM 12D08B02-01E

2-4 Appendix

12-3. Sensor wiring

Refer to figure 12-1, 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. For details, refer to corresponding IMs.

SC4AJ Conductivity Sensor
(two-electrode type)

SC210G Conductivity Detector
(two-electrode type)

Figure 12-1. Sensor wiring diagrams

11

12

13

14

15

16

11

12

13

14

15

16

Temperature

Electrode

Temperature

Electrode

11

Temperature

12

13

14

Electrode

15

16

SC8SG Conductivity Detector
(two-electrode type, four-electrode type)

IM 12D08B02-01E

Appendix 2-5

12-4. Supplement of parameter setting

12-4-1. Set cell constant (service code 03)

Code 3 *0.10xC First select a multiplying factor, and then set the constant in consideration of this fac-

tor. The position of the decimal point can be selected after the first digit has been set

(when the decimal point is flashing).
*How to enter the cell constant
(1) In the case that the only cell constant is mentioned on the text plate of the sensor (SC211G,

SC8SG, SC4AJ). How to enter the cell constant of 0.0195 /cm: Select *0.01xC on the message
display, and then enter the value of 1.950 on the main display.

(2) In the case that the deviation of a nominal cell constant (± X.X%) is mentioned on the text plate

of the sensor (SC210G).
When the nominal cell constant is 5 /cm and the deviation (CORR.% = -1.1) is mentioned:
The cell constant to be entered is calculated as follows:
5 + 5 x (-1.1/100) = 4.945
How to enter the cell constant of 4.945 /cm:
Select *10.0xC on the message display, and then enter the value of 0.495 (rounded to three

decimal places) on the main display. (The first digit in the constant setting only accepts 1 or 2.)

12-4-2. Temperature sensor (service code 10)

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

PT1000 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. The temperature sensors for the applicable conductivity sensors
are as follows. According to the conductivity sensor used, select the appropriate

temperature sensor.
* SC210G PB36NTC
* SC211G Pt1000
* SC8SG Pt1000
* SC4AJ Pt1000

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 (PB36NTC) 2
Pt100 3
8k55 (8.55kNTC) 4

12-4-3. Automatic return (service code 50)

If no key is operated for 10 minutes in any mode other than measurement mode or after 10 minutes in
Hold status, Auto-Return (factory setting: On (1) in service code 50) will be activated to return the trans­mitter to measurement mode. To disable Auto-Return, set the service code 50 to Off (0).

WARNING

When stopping auto-return function, the transmitter doesn't automatically return to measurement mode. Take
care of returning measurement mode for re-measurement.

IM 12D08B02-01E

2-6 Appendix

12-4-4. Error setting (service code 53)

Code 53 *Err01 to 13 Error message configuration:

Two different types of failure mode namely, Hard fail and Soft fail can be set.
Hard fail gives a steady FAIL flag in the display. When the distributor PH201G
(Style B) is used and its communication is enabled in Service Code 60, the fail
contact of PH201G (Style B) is closed. A fail signal is transmitted on the mA out­put when enabled in code 32.
Soft fail gives a flashing FAIL flag in the display. In this case the fail contact of
PH201G (Style B) is not closed. A good example is the dry sensor for a soft fail.
A warning that the regular maintenance is due, may not be required to shut down
the whole measurement.
In addition the hold contact of PH201G (Style B) can be activated as it has noth­ing to do with the setting of Hard or Soft fail.

12-4-5. E5 and E6 setting (service code 54)

Code 54 *E5.LIM & *E6.LIM
Limits can be set for shorted and open measurement. Dependent on the main

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/resisitivity value). On
the parameter setting screen, you should ignore the unit such as [/cm] and [.cm].
Example: When E5LIM is 250 mS [/cm] and the detector has a cell constant of 10

-1

then 250 mS x 10 cm-1= 2500 mS/cm.

cm

12-4-6. Communication with PH201G (style B) distributor (service code 60)

This communication is a one-way to PH201G (Style B) distributor, a power supplier for the EXA 202
transmitters.
The PH201G (Style B) receives a current signal (4-20 mA DC) and a digital signal superimposed on the
DC signal.
In other words, the PH201G (Style B) provides a measurement signal, a hold-contact signal and a fail­contact signal.
The communication with PH201G (Style B) is set in Service code 60.

Code 60 *COM When used with our PH201G (Style B) you can enable or disable contact outputs,

namely, Fail contact and Hold contact. The PH201G (Style B) can output Hold contact
and Fail contact signals. You can set Service Code 53 to "0" for "soft fail" to disable
Fail contact output. When you set Service Code 53 to "1" for "hard fail", set Service
Code 60 to "2.0" to enable Fail contact output of PH201G (Style B), or set Service
Code 60 to "0.1" to disable Fail contact output of PH201G (Style B).

Code Display Function Function detail X Y Z Default values
Communication

60 *COMM. Communication Set HART communication Off 0 1.0
Set HART communication On 1
Set communication PH201G*B On 2
NA 0
NA 1

On

60.eps

IM 12D08B02-01E

13. APPENDIX 3 QUALITY INSPECTION

13-1. SC202G 2-Wire Conductivity Transmitter

Appendix 3-1

Quality
Inspection

SC202G, SC202SJ
2-Wire Conductivity Transmitter

Standards

1. Scope

This inspection standard applies to the SC202/SC202SJ 2-Wire Conductivity Transmitter.

2. Inspection Items

2.1 Insulation resistance test

2.2 Current output test

2.3 Temperature indication check

2.4 Resistance (conductivity) check

3. Inspection Methods, Standards and Conditions

z Connect the testing circuit as shown in Figure 1. Allow the instrument to warm up for at least

5 minutes before conducting the tests. For the connections for the insulation resistance test,
follow the instructions in Section 3.1.

z Performance tests should be done in the inspection mode where the tests from Section 3.2

through Section 3.4 take place in sequence and cannot be retraced. If the reconfirmation of
a test is needed, turn off the power to the transmitter, turn on the power again, and enter the
inspection mode to restart the tests.

z Set the equipment as follows.

Decade resistance box 1 (temperature): 960.9 :
Decade resistance box 2 (conductivity): 10 :
DC source: 24 VDC

3.1 Insulation Resistance Test

As for the PH202G, follow the instructions below.

(1) Apply 500 V DC between the power supply terminals shorted together (+ and –) and the

earth terminal (G). The insulation resistance must be 100 M or greater.

(2) Apply 500 V DC between the input terminals shorted together (11 to 16) and the earth

terminal (G). The insulation resistance must be 100 M or greater.

As for the PH202SJ, follow the instructions below.

(1) Apply 125 V DC between the power supply terminals shorted together (+ and –) and the

earth terminal (G). The insulation resistance must be 9.5 M or greater.

(2) Apply 125 V DC between the input terminals shorted together (11 to 16) and the earth

terminal (G). The insulation resistance must be 100 M or greater.

3.2 Current Output Test

<Test>
(1) Enter Service Code 87 and then password 070.
(2) When the message display shows “*HIF”, press the [YES] key.
(3) Press the [ENT] key. (The date in day-month-year (last 2 digits) order will appear.)
(4) Press the [ENT] key. (The time in hour-minute-second order will appear.)
(5) Press the [ENT] key.
(6) When the message display shows “4 (mA),” the output current must be within the range

shown in Table 1.
(7) After confirmation, press the [ENT] key.
(8) To skip the current output if not needed to be checked, just press the [ENT] key.

QIS 12D08B02-01E

1st Edition: Feb. 2001(YK)
6th Edition: Mar. 2007(YK)

IM 12D08B02-01E

3-2 Appendix

(9) After the test at 20 mA, press the [ENT] key twice.

Table 1

Current output (mA) Current output (mA DC)

4.0 4 ±0.02

12.0 12 ±0.02

20.0 20 ±0.02

3.3 Temperature Indication Check

(1) Check that the temperature sensor type indicated on the message display is “Pt1000.”
(2) Change the value of the decade resistance box 1 (temperature) as shown in Table 2 and

check the data display. The temperature value on the data display must be within the range

shown in Table 2.
(3) Press the [ENT] key until the message display shows “8k55.”
(4) Press the [ENT] key. A “*WAIT” message will flash.

Table 2

Decade box 1 resistance (:)

960.9 -10 ±0.3

1289.8 75 ±0.3

1721.6 190 ±0.3

1904.6 (*) 240 ±0.3

(*) This item is checked under measurement mode.

3.4 Resistance (Conductivity) Indication Check

(1) Check that in the message display “*WAIT” has disappeared and instead “RES.1” appears.
(2) Set decade resistance box 2 to 10 : and check the data display. The resistance must be

within the range shown in Table 3.
(3) Press the [ENT] key. The message display will show “RES.2.”
(4) Set decade resistance box 2 to 100 : and check the data display. The resistance must

be within the range shown in Table 3.
(5) Press the [ENT] key. The message display will show “RES.3.”
(6) Set decade resistance box 2 to 1 k: and check the data display. The resistance must be

within the range shown in Table 3.
(7) Press the [ENT] key. The message display will show “RES.4.”
(8) Set decade resistance box 2 to 10 k: and check the data display. The resistance must

be within the range shown in Table 3.
(9) Press the [ENT] key. The message display will show “RES.5.”
(10) Set decade resistance box 2 to 100 k: and check the data display. The resistance must

be within the range shown in Table 3.
(11) Press the [ENT] key. The message display will show “READY.”
(12) Press the [ENT] key to restart the transmitter.

This completes all the tests.

Table 3

Message display Decade box 2 resistance Data display

RES.1
RES.2
RES.3
RES.4
RES.5

Data display (°C)

10 : 10.00 ±0.05 :

100 : 100.0 ±0.5 :

1 k: 1.000 ±0.005 k:

10 k: 10.00 ±0.05 k:

100 k: 100.0 ±0.5 k:

2/3

IM 12D08B02-01E

QIS 12D08B02-01E

SC202G, SC202SJ

SUPPLY SENSOR

-

+

100 :

+

DC source

24V DC

Note 1: Cable connected to sensor input s hould be conductivity detector cable of

G

+

DC

Milli-

ammeter

-

-

Ground

length 2.1 ±0.1 m. Connect pins 13 and 14, also 15 and 16, to Decade box 2
terminals. Use shielded cable, and connect shield to pin 14.

11 12 1413 15 16

Decade

Box 1

Decade

Box 2

Appendix 3-3

3/3

Note 1

Figure 1 Testing Circuit and Test Equipment

QIS 12D08B02-01E

IM 12D08B02-01E

3-4 Appendix

IM 12D08B02-01E

13-2. SC202S 2-Wire Conductivity Transmitter

Appendix 3-5

Quality
Inspection

SC202S
2-Wire Conductivity Transmitter

Standards

1. Scope

This inspection standard applies to the SC202

2. Inspection Items

2.1 Insulation resistance test
* 2.2 Dielectric strength test

2.3 Current output test

2.4 Temperature indication check

2.5 Resistance (conductivity) check

Note: Items marked with an asterisk (*) may only be confirmed by a test certificate.

3. Inspection Methods, Standards and Conditions

z Connect the testing circuit as shown in Figure 1. Allow the instrument to warm up for at least

5 minutes before conducting the tests. For the connections for the insulation resistance test,
follow the instructions in Section 3.1 and for the connections for the dielectric strength test,
follow the instructions in Section 3.2.

z Performance tests should be done in the inspection mode where the tests from Section 3.3

through Section 3.5 take place in sequence and cannot be retraced. If the reconfirmation of
a test is needed, turn off the power to the transmitter, turn on the power again, and enter the
inspection mode to restart the tests.

z Set the equipment as follows.

Decade resistance box 1 (temperature): 960.9 :
Decade resistance box 2 (conductivity): 10 :
DC source: 24 VDC

 2-Wire Conductivity Transmitter.

3.1 Insulation Resistance Test

(1) Apply 500 V DC between the power supply terminals shorted together (+ and –) and the

earth terminal (G). The insulation resistance must be 100 M or greater.

(2) Apply 500 V DC between the input terminals shorted together (11 to 16) and the earth

terminal (G). The insulation resistance must be 100 M or greater.

3.2 Dielectric strength test

Apply 600 V AC, an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz
or 60 Hz, between the terminals shown below, for at least 2 seconds. The insulation must
withstand this voltage. (The sensed current should be 10 mA.)

(1) Between the power supply terminals shorted together (+ and –) and the earth terminal (G)

(2) Between the input terminals shorted together (11 to 16) and the earth terminal (G)

(3) Between the input terminals shorted together (11 to 16) and the power supply terminals

shorted together (+ and –)

3.3 Current Output Test

<Test>
(1) Enter Service Code 87 and then password 070.
(2) When the message display shows “*HIF”, press the [YES] key.

QIS 12D08B02-21E

1st Edition: Mar. 2007(YK)

IM 12D08B02-01E

3-6 Appendix

(3) Press the [ENT] key. (The date in day-month-year (last 2 digits) order will appear.)
(4) Press the [ENT] key. (The time in hour-minute-second order will appear.)
(5) Press the [ENT] key.
(6) When the message display shows “4 (mA),” the output current must be within the range

shown in Table 1.
(7) After confirmation, press the [ENT] key.
(8) To skip the current output if not needed to be checked, just press the [ENT] key.
(9) After the test at 20 mA, press the [ENT] key twice.

Table 1

Current output (mA) Current output (mA DC)

4.0 4 ±0.02

12.0 12 ±0.02

20.0 20 ±0.02

3.4 Temperature Indication Check

(1) Check that the temperature sensor type indicated on the message display is “Pt1000.”
(2) Change the value of the decade resistance box 1 (temperature) as shown in Table 2 and

check the data display. The temperature value on the data display must be within the range

shown in Table 2.
(3) Press the [ENT] key until the message display shows “8k55.”
(4) Press the [ENT] key. A “*WAIT” message will flash.

Table 2

Decade box 1 resistance (:)

960.9 -10 ±0.3

1289.8 75 ±0.3

1721.6 190 ±0.3

1904.6 (*) 240 ±0.3

(*) This item is checked under measurement mode.

Data display (°C)

2/3

3.5 Resistance (Conductivity) Indication Check

(1) Check that in the message display “*WAIT” has disappeared and instead “RES.1” appears.
(2) Set decade resistance box 2 to 10 : and check the data display. The resistance must be

within the range shown in Table 3.
(3) Press the [ENT] key. The message display will show “RES.2.”
(4) Set decade resistance box 2 to 100 : and check the data display. The resistance must

be within the range shown in Table 3.
(5) Press the [ENT] key. The message display will show “RES.3.”
(6) Set decade resistance box 2 to 1 k: and check the data display. The resistance must be

within the range shown in Table 3.
(7) Press the [ENT] key. The message display will show “RES.4.”
(8) Set decade resistance box 2 to 10 k: and check the data display. The resistance must

be within the range shown in Table 3.
(9) Press the [ENT] key. The message display will show “RES.5.”
(10) Set decade resistance box 2 to 100 k: and check the data display. The resistance must

be within the range shown in Table 3.
(11) Press the [ENT] key. The message display will show “READY.”
(12) Press the [ENT] key to restart the transmitter.

This completes all the tests.

QIS 12D08B02-21E

IM 12D08B02-01E

Table 3

Message display Decade box 2 resistance Data display

RES.1

RES.2
RES.3
RES.4
RES.5

SUPPLY SENSOR

-

+

100 :

+

DC

Milli-

ammeter

-

G

10 : 10.00 ±0.05 :

100 : 100.0 ±0.5 :

1 k: 1.000 ±0.005 k:

10 k: 10.00 ±0.05 k:

100 k: 100.0 ±0.5 k:

SC202S

11 12 1413 15 16

Note 1

Appendix 3-7

3/3

-

+

DC source

24V DC

Note 1: Cable connected to sensor input s hould be conductivity detector cable of

length 2.1 ±0.1 m. Connect pins 13 and 14, also 15 and 16, to Decade box 2
terminals. Use shielded cable, and connect shield to pin 14.

Ground

Decade

Box 1

Decade

Box 2

Figure 1 Testing Circuit and Test Equipment

QIS 12D08B02-21E

IM 12D08B02-01E

3-8 Appendix

IM 12D08B02-01E

13-3. SC202G, SC202S 2-Wire Conductivity Transmitter (Fieldbus Communication)

Appendix 3-9

Quality
Inspection
Standards

1. Scope

This inspection standard applies to the SC202G and SC202S 2-Wire Conductivity Transmitters
(Fieldbus specification).

2. Inspection Items

2.1 Insulation resistance test
* 2.2 Dielectric strength test

2.3 Temperature indication check

2.4 Conductivity indication check
* 2.5 Fieldbus communication functional check

Note: Items marked with an asterisk (*) may only be confirmed by a test certificate.

3. Inspection Methods, Standards and Conditions

z Connect the testing circuit as shown in Figure 1. Allow the instrument to warm up for at least

5 minutes before conducting the tests. For the connections for the insulation resistance test,
follow the instructions in Section 3.1 and for the connections for the dielectric strength test,
follow the instructions in Section 3.2.

z Use test equipment shown in Figure 1, or equivalent, for the tests.

SC202G, SC202S
2-Wire Conductivity Transmitter
(Fieldbus Communication)

3.1 Insulation Resistance Test

(1) Apply 500 V DC between the power supply terminals shorted together (+ and –) and the

earth terminal (G). The insulation resistance must be 100 M or greater.

(2) Apply 500 V DC between the input terminals shorted together (11 to 16) and the earth

terminal (G). The insulation resistance must be 100 M or greater.

3.2 Dielectric Strength Test (Required Only for SC202S)

Apply 600 V AC, an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz
or 60 Hz, between the terminals shown below, for at least 2 seconds. The insulation must
withstand this voltage. (The sensed current should be 10 mA.)

(1) Between the power supply terminals shorted together (+ and –) and the earth terminal (G)

(2) Between the input terminals shorted together (11 to 16) and the earth terminal (G)

(3) Between the input terminals shorted together (11 to 16) and the power supply terminals

shorted together (+ and –)

3.3 Temperature Indication Check

Connect the instruments as shown in Figure 1, and set them as follows.

Decade resistance box 1: 960.9 :
Decade resistance box 2: 10 

QIS 12D08B02-61E

1st Edition: Apr. 2007

IM 12D08B02-01E

3-10 Appendix

In this state, change the resistance value of the decade resistance box 1 as shown in Table 1.
The corresponding temperature indication must be within the range.

Table 1 Temperature Indication Check

Reference

Temperature

–10 °C

75 °C
190 °C 1721.6  190 ±0.3 °C
240 °C 1904.6  240 ±0.3 °C

3.4 Conductivity Indication Check

Connect the instruments as shown in Figure 1, and set them as follows.

Decade resistance box 1: 100 
Decade resistance box 2: 10 

In this state, change the resistance value of the decade resistance box 2 as shown in Table 2.
The corresponding conductivity indication must be within the range.

Table 2 Conductivity Indication Check (Cell Constant : 0.1/cm)

Reference

Conductivity

10 mS/cm 10  10 ±0.05 mS/cm

1 mS/cm

100 S/cm

10 S/cm

1 S/cm

Resistance of

Resistance Box 1

960.9 :

1289.8 :

Resistance of

Resistance Box 2

100 :

1 k:

10 k:

100 k:

2/3

Indication Range

–10 ±0.3 °C

75 ±0.3 °C

Indication Range

1 ±0.005 mS/cm
100 ±0.5 S/cm
10 ±0.05 S/cm
1 ±0.005 S/cm

3.5 Fieldbus Communication Functional Check

Check for normal function using Fieldbus equipment specified by Yokogawa.

IM 12D08B02-01E

QIS 12D08B02-61E

Appendix 3-11

3/3

Figure 1 Testing Circuit and Test Equipment

QIS 12D08B02-61E

IM 12D08B02-01E

3-12 Appendix

IM 12D08B02-01E