How it Works
Yokogawa
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PH202
User Manual
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Yokogawa PH202 User Manual

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User’s Manual
Model PH202G [Style: S3], PH202S [Style: S3]
2-wire Type pH/ORP(Redox) Transmitter
IM 12B07D02-01E
IM 12B07D02-01E
11th Edition
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
4-5-1. Display functions pH (default)..........................................................................................4-4
4-5-2. Display functions pH (ORP).............................................................................................4-5
4-5-3. Display functions pH (rH).................................................................................................4-6
5. Parameter setting ............................................................................................... 5-1
5-1. Maintenance mode ......................................................................................... 5-1
5-1-1. Manual temperature selection and adjustment ...............................................................5-2
5-1-2. Process temperature measuring in ORP mode...............................................................5-3
5-1-3. Manual activation of HOLD..............................................................................................5-4
5-1-4. Manual impedance check ................................................................................................5-5
5-2. Commissioning mode ..................................................................................... 5-6
5-2-1. Output range ....................................................................................................................5-7
5-2-2. Hold ..............................................................................................................................5-8
5-2-3. Service ...........................................................................................................................5-10
5-3. Notes for guidance in the use of service coded settings ...............................5-11
5-3-1. Parameter specific functions .........................................................................................5-11
5-3-2. Temperature compensation and measuring functions. .................................................5-13
5-3-3. Calibration functions ......................................................................................................5-15
5-3-4. mA output functions .......................................................................................................5-17
5-3-5. User interface ................................................................................................................5-19
5-3-6. Communication setup ....................................................................................................5-21
5-3-7. General .........................................................................................................................5-21
5-3-8. Test and setup mode ....................................................................................................5-21
6. Calibration ....................................................................................................... 6-1
6-1. Automatic calibration ....................................................................................... 6-1
6-2. Manual calibration ........................................................................................... 6-1
6-3. Sample calibration .......................................................................................... 6-1
6-4. Data entry ....................................................................................................... 6-1
6-5. Calibration procedures .................................................................................... 6-2
6-5-1. Automatic calibration .......................................................................................................6-2
6-5-2. Automatic calibration with HOLD active ..........................................................................6-3
6-5-3. Manual calibration (2nd parameter calibration) ...............................................................6-4
6-5-4. Sample calibration ..........................................................................................................6-6
7. Maintenance ....................................................................................................... 7-1
7-1. Periodic maintenance for the EXA transmitter ................................................ 7-1
7-2. Periodic maintenance for the sensor system .................................................. 7-1
7-3. Calibration procedures are described in step-by-step detail in chapter 6. ..........
However, follow these guidelines. .................................................................... 7-2
8. Troubleshooting ................................................................................................. 8-1
8-1. Diagnostics ..................................................................................................... 8-2
8-1-1. Off-line calibration checks ...............................................................................................8-2
8-1-2. On-line impedance checks ..............................................................................................8-2
9. Spare Parts ....................................................................................................... 9-1
IM 12B07D02-01E
10. Appendix ..................................................................................................... 10-1
10-1. User setting table ........................................................................................ 10-1
10-2. Configuration checklist for PH202G ........................................................... 10-3
10-3. Setup for sensor compatibility ..................................................................... 10-4
10-3-1. General ........................................................................................................................10-4
10-3-2. Selection of measurement and reference electrode ...................................................10-4
10-3-3. Selecting a temperature sensor...................................................................................10-4
10-4. Set up for other functions ............................................................................ 10-5
10-5. Set up for Pfaudler Type 18 sensor ............................................................ 10-6
10-5-1. General set up .............................................................................................................10-6
10-5-2. Calibration set up .........................................................................................................10-6
10-6. Device Description (DD) menu structure .................................................... 10-7
Glossary
11. APPENDIX 2 .....................................................................................................11-1
11-1. Preface ......................................................................................................11-1
11-2. Wiring diagrams ...........................................................................................11-2
11-2-1. Example of Non-Explosionproof System ....................................................................11-2
11-2-2. Example of Intrinsically Safe Explosionproof System ................................................11-2
11-3. Sensor wiring ...............................................................................................11-2
11-3-1. Connection cable .........................................................................................................11-3
11-3-2. Sensor cable connection using terminal box ...............................................................11-5
11-4. PH201G*B Dedicated Distributor .................................................................11-5
11-4-1. Communication setup .................................................................................................11-5
11-4-2. The setting of sending WASH signal (*WASH) ..........................................................11-6
11-4-3. How to output manual wash signal ............................................................................11-8
11-4-4. Setting of errors (FAIL contact) ..................................................................................11-9
11-5. Calibration in ORP Mode ...........................................................................11-10
11-5-1 Electrode Check .........................................................................................................11-10
11-5-2. Manual Calibration .....................................................................................................11-11
11-5-3. Calibration with Sample .............................................................................................11-11
11-5-4. Data Entry ..................................................................................................................11-11
11-5-5. Calibration Procedure ................................................................................................11-12
11-6. Supplement of troubleshooting ..................................................................11-13
11-6-1. Error Codes ..............................................................................................................11-13
11-6-2. On-line impedance checks .......................................................................................11-14
11-6-3. Supplement of temperature sensor ..........................................................................11-15
11-6-4. Auto-Return .............................................................................................................11-15
11-6-5. CALEND ...................................................................................................................11-15
11-6-6. How to cancel sample calibration .............................................................................11-15
12. Appendix 3 QUALITY INSPECTION ............................................................... 12-1
12-1. PH202G, PH202SJ 2-Wire pH/ORP Transmitter ........................................ 12-1
12-2. PH202S 2-Wire pH/ORP Transmitter ......................................................... 12-5
12-3. PH202G, PH202S 2-Wire pH/ORP Transmitter .................................................
(Fieldbus Communication) ............................................................................. 12-9
12-4. PH202G, PH202S 2-Wire pH/ORP Transmitter .................................................
(Profibus Communication) ........................................................................... 12-13
Customer Maintenance Parts List (PH202G Style : S3) ........CMPL 12B07D02-03E
Customer Maintenance Parts List (PH202S Style : S3).........CMPL 12B07D02-23E
Revision Rcord ............................................................................................................i
IM 12B07D02-01E
IM 12B07D02-01E

PREFACE

DANGERDANGER
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 PH202 transmitter.
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.
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
Because the enclosure of the pH/ORP transmitter Type PH202S-E, -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.
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.
IM 12B07D02-01E
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
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.
This symbol indicates Function Ground
Terminal (Do not use this terminal as the protective ground terminal.)
This symbol indicates Alternating current.
This symbol indicates Direct current.
Returned goods that have been in contact with process fluids must be decontaminated/disin­fected before shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed.
IM 12B07D02-01E
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 12B07D02-01E
SK
CZ
PL
SLO
LT
LV
EST
H
BG
RO
IM 12B07D02-01E
M
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
PH/ORP TRANSMITTER
PH/ORP TRANSMITTER
carefully and inspect it to ensure that it was not damaged during shipment. If damage is found, retain the original
MODEL SUFFIX
PH202
MODEL SUFFIX
PH202S-E
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.
SUPPLY OUTPUT
AMB.TEMP.
STYLE No.
24V DC 4 20mA DC
-10  55°C
SUPPLY OUTPUT
AMB.TEMP.
STYLE No.
II 1G
24V DC 4 20mA DC
-10 55°C
No. IECEx KEM 06.0052X Zone 0 Ex ia IIC T4 Zone 0 Ex ia IIC T6 for Ta:40 IP65 SEE CONTROL DRAWING
No. KEMA 06ATEX0218 X Ex ia IIC T4 Ex ia IIC T6 for Ta:40 SEE CONTROL DRAWING
˚C
˚C
IP65
mA
PH/ORP TRANSMITTER
MODEL SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
STYLE
No.
PH202S-U
24V DC
4 20mA DC
-10 55°C
No. IECEx KEM 06.0052X Zone 0 Ex ia IIC T4
Zone 0 Ex ia IIC T6 for Ta:40 IP65 SEE CONTROL DRAWING
IS CL I, DIV 1, GP ABCD AND AEx ia IIC T4
Type 4X Install per CONTROL DRAWING IKE024-A10 P.4-1 to P.4-2
Made in Japan Tokyo 180-8750 JAPAN
N200
Made in Japan Tokyo 180-8750 JAPAN
0344
N200
PH/ORP TRANSMITTER
MODEL
PH202S-C
SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
24V DC 4 20mA DC
-10  55°C STYLE No.
No. IECEx KEM 06.0052X Zone 0 Ex ia IIC T4
˚C
Zone 0 Ex ia IIC T6 for Ta:40 IP65 SEE CONTROL DRAWING
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
AVERTISSEMENT La substitution de composants peut compromeltre la securite intrinseque.
˚C
˚C
LR81741
WARNING Substitution of components may impair suitability for class I, Division 2.
PH202S-N
No. IECEx KEM 06.0052X Ex nA[nL] IIC T4 Ex nA[nL] IIC T6 for Ta:40 IP65 SEE CONTROL DRAWING
No. KEMA 06ATEX0219 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 IKE024-A10 P.4-3 to P.4-4
Ex nA[nL] IIC NI CL I, DIV 2, GP ABCD T4
R
T6 for Ta:40
˚C
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
Made in Japan
Figure 1-1. Nameplate
N200
Made in Japan
N200
IM 12B07D02-01E
1-2 Introduction
DISSOLVED OXYGEN TRANSMITTER
MODEL
PH202G-F
SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
9 TO 32VDC FF-TYPE113
-10  55°C STYLE No.
Made in Japan Tokyo 180-8750 JAPAN
N200
PH/ORP TRANSMITTER
MODEL
PH202S-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
DISSOLVED OXYGEN TRANSMITTER
MODEL
PH202G-P
SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
9 TO 32VDC
PROFIBUS-PA
-10  55°C STYLE No.
Made in Japan Tokyo 180-8750 JAPAN
N200
PH/ORP TRANSMITTER
MODEL
PH202S-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
PH/ORP TRANSMITTER
MODEL SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
STYLE No.
Cert No. GYJ081156X Ex ia IIC T4 Ex ia IIC T6 for Ta:40 SEE USER’S MANUAL BEFORE USE
Made in Japan Tokyo 180-8750 JAPAN
FISCO field device
IECEx KEM 07.0026X
No. Zone 0 Ex ia IIC T4
IP65 SEE CONTROL DRAWING
KEMA 07ATEX0048 X
No. Ex ia IIC T4
II 1G
SEE CONTROL DRAWING
IS CL I, DIV 1, GP ABCD AND AEx ia IIC
Type 4X
T4
Install per CONTROL DRAWING IKE025-A10 P.4 to P.7
CL I, DIV 1, GP ABCD Ex ia IIC T4
R
SEE CONTROL DRAWING
LR81741 C
WARNING Substitution of components may impair intrinsic safety
IP65 Type 3S
PH202S-F/-P
PH202S-K
24V DC 4 20mA DC
-10  55°C
˚C
IP65
AVERTISSEMENT La substitution de composants peut compromeltre la securite intrinseque.
PH/ORP TRANSMITTER
MODEL
PH202S-B
SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
9 TO 32VDC FF-TYPE 113
-10  55°C STYLE No.
Made in Japan Tokyo 180-8750 JAPAN
Figure 1-2. Nameplate
IM 12B07D02-01E
N200
PH/ORP TRANSMITTER
MODEL
PH202S-D
SUFFIX
SUPPLY OUTPUT
AMB.TEMP.
9 TO 32VDC PROFIBUS-PA
-10  55°C STYLE No.
Made in Japan Tokyo 180-8750 JAPAN
N200
FNICO field device
No.
IECEx KEM 07.0026X
Ex nA[nL] IIC T4 Ex nA[nL] IIC T6 for Ta:40 IP65 SEE CONTROL DRAWING
KEMA 07ATEX0049
No. 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 IKE025-A10 P.8 to P.9
Ex nA[nL] IIC NI CL I, DIV 2, GP ABCD T4
R
T6 for Ta:40
LR81741 C
WARNING Substitution of components may impair suitability for class I, Division 2.
IP65 Type 3S
SEE CONTROL DRAWING
AVERTISSEMENT La substitution de composants peut rendre ce materiel inacceptable pour les emplacements de Classe I, Division 2.
PH202S-B/-D
°C
°C
°C
Introduction 1-3
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 PH202 User’s Manual English Optional mounting hardware when specified (See model code)
NOTE: mounting screws and special grommet are packed in the terminal compartment, together with a
second link for impedance selection.

1-2. Application

The EXA converter is intended to be used for continuous on-line measurement in industrial installations. The unit combines simple operation and microprocessor-based performance with advanced self-diag­nostics and enhanced communications capability to meet the most advanced requirements. The meas­urement can be used as part of an automated process control system. It can also be used to indicate dangerous limits of a process, to monitor product quality, or to function as a simple controller for a dos­ing/neutralization system.
Yokogawa designed the EXA analyzer to withstand harsh environments. The converter 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 con­verter in order to ensure easy calibration and peak performance. If the unit must be mounted remotely from the sensors, WF10 extension cable can be used up to a maximum of 50 metres (150 feet) with a BA10 junction box. Except installations with dual high impedance sensors, where the maximum cable length is 20 metres using integral cable only (no junction box).
The EXA is delivered with a general purpose default setting for programmable items. (Default settings are listed in Chapter 5 and again in Chapter 10). 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 eight different types of temperature sensors.
To record such configuration adjustments, write changes in the space provided in Chapter 10 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.
IM 12B07D02-01E
1-4 Introduction
IM 12B07D02-01E
2-2 Specification

2-2. Operating specifications

A. Performance : pH
- Linearity : ±0.01 pH
- Repeatability: ±0.01 pH
- Accuracy : ±0.01 pH
Performance : ORP
- Linearity : ±1 mV
- Repeatability : ±1 mV
- Accuracy : ±1 mV
Performance : Temperature with Pt1000 Ω, 3kΩ Balco, 5k1Ω, 350Ω, 6k8Ω, PTC10kΩ &
8k55Ω
- Linearity : ±0.3 ˚C
- Repeatability: ±0.1 ˚C
- Accuracy : ±0.3 ˚C
Performance : Temperature with Pt100 Ω
- Linearity : ±0.4 ˚C
- Repeatability: ±0.1 ˚C
- Accuracy : ±0.4 ˚C
Note on performance specifications:
The following tolerance is added to above
performance. mA output tolerance : ± 0.02 mA of "4 - 20 mA"
B. Ambient operating temperature
: -10 to + 55 ˚C (10 to 131 ˚F)
C. Storage temperature
: -30 to +70 ˚C (-20 to 160 ˚F)
D. Humidity
: 10 to 90% RH (Non-condensing)
F. Housing:
Case: Cast aluminum case with chemically
resistant coating Cover: Polycarbonate window. Case color: Off-white (Equivalent to Munsell
2.5Y8.4/1.2) Cover color: Deep sea Moss green (Equivalent to Munsell 0.6GY3.1/2.0)
Cable and terminals : The PH202 is equipped with terminals
suitable for the connection of finished cables in the size: 0.13 to 2.5 mm (26 to
14 AWG) Cable entry: 2 cable glands 1/2NPT. The cable 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). Construction : Weather resistant to IP65 and NEMA 4X standards Mounting : Pipe, wall or panel mounting, using optional hardware Weight : Approx. 1.6 kg
G. Shipping details
: Package size w x h x d
290 x 300 x 290 mm.
11.5 x 11.8 x 11.5 in. Packed weight approx. 2.5 kg (5lb)
H. Data protection
: EEPROM for configuration and logbook, and
lithium cell for clock.
I. Watchdog timer
: Checks microprocessor
J. Automatic safeguard
: Return to measuring mode when no keystroke
is made for 10 min.
K. Operation protection
: 3-digit programmable password.
L. Sensor impedance checking
: Independent impedance check on measuring
and reference sensor elements, with temperature compensation. Display of sensor impedance on message line of display. FAIL flag in event of “out of limits” impedance, and the possibility of 21 mA or (3.6 mA or 3.9 mA) error signal.
M. Signal processing (pH/ORP)
: The PH202 can measure pH or ORP. Using
the FU20 allows simultaneous measurement and display of pH and ORP. It also allows display and out put of pH.
Grounding terminal
IM 12B07D02-01E
Sensor cable gland
Power/Output cable gland
N. 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.
Specification 2-3
O. Intrinsically safe
Refer to conrol drawings.
mA
Item
Factory Mutual (FM)
IECEx
CENELEC ATE X
IECEx
Canadian Standards Association (CSA)
IECEx
(Note)
IECEx Scheme
Item
CENELEC ATE X
Entity
CENELEC ATE X
FISCO
CENELEC ATE X
Item
IECEx Scheme
Entity
IECEx Scheme
FISCO
IECEx Scheme
Description
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 μH
IECEx Intrinsically safe (see Note)
CENELEC ATEX (KEMA) Intrinsically safe Approval
Applicable standard: EN60079-0, EN50020, EN60079-26 Certificate: KEMA 06ATEX0218 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 μH
IECEx Intrinsically safe (see Note)
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 μH
IECEx Intrinsically safe (see Note)
IECEx Intrinsically safe
Applicable standard: IEC60079-0, IEC60079-11, IEC60079-26 Certificate: IECEx KEM 06.0052X
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 μH
Description
CENELEC ATEX (KEMA) Intrinsically safe Approval
Applicable standard: EN60079-0, EN50020 EN60079-26 Certificate: KEMA 07ATEX0048 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 μH
CENELEC ATEX (KEMA) Intrinsically safe Approval
Applicable standard: EN60079-0, EN50020 EN60079-26, EN60079-27 Certificate: KEMA 07ATEX0048 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 μH
CENELEC ATEX (KEMA) Type of protection "n"
Applicable standard: EN60079-0:2006, EN60079-15:2003 Certificate: KEMA 07ATEX0049
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 μH
IECEx Intrinsically safe
Applicable standard: IEC 60079-0, IEC60079-11, IEC60079-26 Certificate: IECEx KEM 07.0026X
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 μH
IECEx Intrinsically safe
Applicable standard: IEC 60079-0, IEC60079-11, IEC60079-26, IEC60079-27 Certificate: IECEx KEM 07.0026X
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 μH
IECEx Type of protection "n"
Applicable standard: IEC 60079-15:2001, IEC 60079-0:2004 Certificate: IECEx KEM 07.0026X
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 μH
Description
Code
-U
-E
-C
T1E.EPS
Code
-P
or
-F
-B
or
-D
ATEX.EPS
Code
-P
or
-F
-B
or
-D
IEC.EPS
Item
Factory Mutual (FM)
CENELEC ATE X
Canadian Standards Association (CSA)
IECEx Scheme
Item
Factory Mutual (FM)
Item
Canadian Standards Association (CSA)
Description
FM Non-incendive safe Approval
Applicable standard: FM3600, FM3611, FM3810 Non-incendive 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 μH
CENELEC ATEX (KEMA) Type of protection "n"
Applicable standard: EN60079-0:2006, EN60079-15:2003 Certificate: KEMA 06ATEX0219
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 μH
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 μH
IECEx Type of protection "n"
Applicable standard: IEC 60079-15:2001, IEC 60079-0:2004 Certificate: IECEx KEM 06.0052X
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 μH
Description
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=24 V, Imax=250 mA,
Entity
Pmax=1.2 W, Ci=220 pF, Li=0 μH Vmax=17.5 V, Imax=380 mA,
FISCO
Pmax=5.32 W, Ci=220pF, Li=0 μH
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=32 V, Pmax=1.2 W,
Entity
Ci=220 pF, Li=0 μH Vmax=32 V, Pmax=5.32 W,
FNICO
Ci=220 pF, Li=0 μH
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 μH Ui(Vmax)=17.5 V, Ii(Imax)=380 mA,
FISCO
Pi(Pmax)=5.32 W, Ci=220 pF, Li=0 μH
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 μH
Entity: FNICO:
Ui(Vmax)=32 V, Ci=220 pF, Li=0 μH
IM 12B07D02-01E
Code
-N
T2.EPS
Code
-P
or
-F
-B
or
-D
FM.EPS
Code
-P
or
-F
-B
or
-D
CSA.EPS
2-4 Specification
mA
mA
NEPSI Certification (PH202S-K)
NEPSI Intrinsically Safe Type
Cert No. GYJ081156X
• 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 17):
Uo=14.4 V, Io=32.3 mA, Po=0.12 W, Co=600 nF, Lo=34 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''. 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-HART® communication A. Input : Two wire system 4-20 mA
B. Power supply :
PH202G : up to 40 volts PH202S : 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. (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 : Rosemount HHT 275/375 L. Other control systems: Yokogawa PRM,
Rosemount AMS, Siemens PDM
M. Output span :
- pH : min 1 pH, max 20 pH. (max 90% zero suppression)
: The instrument is user
programmable for linear or non­linear pH ranges.
N. Cable specification
: 0.5 mm diameter or 24 AWG over
maximum length of 1500 m
O. DD specification
: The PH202 Device Description is
available enabling communications with the Handheld Communicator and compatible devices.
IM 12B07D02-01E
Specification 2-5
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 FISCO-Model
F. Power supply: Power supply is achieved de-
pendant on the application by means of segment coupler
G. Data transfer: According to PROFIBUS- PA
profile class B based on EN 50170 and DIN 19245 part 4
H. GSD file: The actual file can be down-
loaded 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
H. Function blocks:
3 x AI, Transducer, Resource
I. Files: Actual file can be downloaded from
our homepage
J. Configuration: locally with 6 keys K. Software: National Instruments:
NI-FBUS configurator
L. Hardware: F-BUS interfaces from National
Instruments (AT-FBUS, PCMIA­FBUS)
M. Other control systems:
YOKOGAWA PRM, DTM
IM 12B07D02-01E
2-6 Specification

2-3. Model and suffix codes

1. 2-Wire pH/ORP Transmitter (Non-explosionproof type)
Model Suffix Code Option Code Description
PH202G
Type
Language
Option
( *1) The PH202G can be also used as ORP transmitter. (Setting can be made in the field. ) ( *2) It can be specified when the suffix code -A is selected. ( *3) The housing is coated with epoxy resin.
2. 2-Wire pH/ORP Transmitter
Model Suffix Code Option Code Description
PH202S
Type
Language
Option
( *1) The PH202S can be also used as ORP transmitter. (Setting can be made in the field. ) ( *2) The housing is coated with epoxy resin. ( *3) When the instrument with Suffix Code "-B,-N,-D" is used, take measures so that the display window is not exposed to direct sunlight.
-E
-C
-U
-P
-F
-J
-E
Mounting Hardware
Hood
Tag Plate Conduit Adapter
(Explosionproof type)
-E
-C
-U
-K
-P
-F
-B
-N
-D
-J
-E
Mounting Hardware
Hood
Tag Plate Conduit Adapter
/U /PM /H /H2 /SCT /AFTG /ANSI /TB /X1
/U /PM /H /H2 /SCT /AFTG /ANSI /X1
2-Wire pH/ORP Transmitter (*1)
mA with HART (Europe type) mA with HART (Canada type) mA with HART (North America type) 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 G 1/2 1/2 NPT Screw terminal (*2) Epoxy baked finish (*3)
2-Wire pH/ORP Transmitter (*1)
Intrinsic safe mA with HART (ATEX) Intrinsic safe mA with HART (CSA) Intrinsic safe mA with HART (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)(*3) Non-incendive mA with HART (ATEX, CSA, FM) (*3) Non-incendive Profibus (ATEX, CSA, FM) (*3)
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 G 1/2 1/2 NPT Epoxy baked finish (*2)
[Style : S3]
[Style : S3]
IM 12B07D02-01E

2-4. Control Drawing of PH202S mA HART® Specification (IECEx).

_
_
_
_
Specification 2-7
SENSOR(S) terminals 11-17
SENSOR(S) termin als 1 1 -1 7
Intrinsically safe design IEC-E x s tand ard E X ia IIC : T4 for am bien t tem p. < 5 5°C
Certificate nr. IECEx KEM 06.0052X PH202S
(pH/O R P -tra nsm itter)
T6 for ambient temp. < 40°C
+
G
Functional earth
Hazardous area Safe area
Zone 0 or 1
Intrinsically safe design IECE x s tan da rd E X ia IIC : T 4 for a mb ient te m p. < 55 ° C
Certificate nr. IECEx KEM 06.0052X
(pH/O R P -tra nsm itter)
PH202S
T6 for ambient temp.< 40°C
+
G
Functional earth
Hazardous area
Zone 0 or 1
Functional
earth
EX ia or ib Certified safety barrier or power with Rint=300 (HART compatible)
Uo = 31 .5 V o lt DC
Io = 100 mA
:
24 volts DC Nominal
Supply Voltage.
Load
Resistance
EX ia or ib Certifie d R e p e a te r Power Supply
(HAR T Comp atible )
+
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 PH202S.
- Supply and output circuit (terminals + and -): Maximum input voltage U
= 31.5 V. Maximum input current Ii= 100 mA.
i
Maximum input power Pi = 1.2 W. Effective internal capacitance Ci = 22 nF. Effective internal inductance L
= 35 PH.
i
- Sensor input circuit (terminals 11 through 17):
Maximum output voltage Uo = 14.4 V. Maximum output current Io = 32.3 mA. Maximum allowed external capacitance Co = 600 nF. (for PH202S-E,-C,-U), Co = 3.5 PF (for PH202S-N). Maximum allowed external inductance Lo = 34 mH (for PH202S-E,-C,-U),
Lo = 76 mH (for PH202S-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 nonincendive type in case it is used in the nonincendive circuit in the hazardous area.
IM 12B07D02-01E
2-8 Specification
_
_
_
_

2-5. Control Drawing of PH202S mA HART® Specification (ATEX)

Intr in s ic ally s a fe de sign CENELE C sta nd ard E E X ia IIC : T 4 fo r am b ien t tem p. < 55°C T6 for ambient temp. < 40°C
Certificate nr. KEMA 06ATEX0218 X
(pH/O R P -tra n s mitte r )
PH202S
+
G
EEx ia or ib Certified safety barrier or power with Rint=300 (HAR T c o m pa tible)
Uo = 31.5 Volt DC Io = 100 mA
:
24 volts DC Nominal
Supply Voltage.
+
SENSOR(S) terminals 11-17
SENSOR(S) termin als 1 1 -1 7
Hazardous area Safe area Zone 0 or 1
Intrinsically safe design CENELEC standard EEx ia IIC: T4 for ambient temp. < 55°C T6 for ambient temp.< 40°C
Certificate nr. KEMA 06ATEX0218 X
(pH/ORP-trans m itte r)
PH202S
Hazardous area Zone 0 or 1
Functional earth
+
G
Functional earth
Functional
earth
Load
Resistance
EEx ia or ib Certified Repeater Power Supply (HART Compatible)
+
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 PH202S.
- Supply and output circuit (terminals + and -): Maximum input voltage U
= 31.5 V. Maximum input current Ii= 100 mA.
i
Maximum input power Pi = 1.2 W. Effective internal capacitance C Effective internal inductance L
= 22 nF.
i
= 35 PH.
i
- Sensor input circuit (terminals 11 through 17):
Maximum output voltage U
= 14.4 V. Maximum output current Io = 32.3 mA.
o
Maximum allowed external capacitance Co = 600 nF. (for PH202S-E,-C,-U), Co = 3.5 PF (for PH202S-N).
Maximum allowed external inductance Lo = 34 mH (for PH202S-E,-C,-U), Lo = 76 mH (for PH202S-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 safety barrier shall be certified by notify body. ・ Installation should be in accordance with local installation requirements. ・ If use ordinary wirings, the general purpose equipment must have Nonincendive
Field Wiring terminal approved.
・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 12B07D02-01E
Specification 2-9
_
_
_

2-6. Control Drawing of PH202S mA HART® Specification (FM Intrinsically safe design)

Intrins ically sa fe design FM Class I, Div.1, Group ABCD, T4 for ambient temp. < 55°C T6 for ambient temp. < 40°C PH202S transmitter
Sensor(s) terminals 11-17 Max. cablelength: 60 mtr. Cable dia. : 3…12 mm.
Intrins ically safe desig n FM Class I, Div.1, Group ABCD, T4 for ambient temp. < 55°C T6 for ambient temp. < 40°C PH202S transmitter
+
G
For electrical data: see text be low .
Classified Location
+
G
Functional
earth
FM Approved safety barrier or power supply with Rint = 300 : (HART compatible)
Functional earth
Unclassified Location
24 volts DC Nominal
Load
Resistance
FM Approved Power Supply (HART compatible)
+
Supply Voltage.
+
-
Figure 1
Output
Supply
Sensor(s) terminals 11-17 Max. cablelength: 60 mtr. Cable dia.: 3…12 mm.
For electrical data: see text below.
Classified Location
Functional earth
Ùnclassified Location
Figure 2
・Electrical data of the PH202S.
-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 17): Maximum output voltage Vt = 14.4 V. Maximum output current It = 32.3 mA. Maximum allowed external capacitance Ca = 600 nF. Maximum allowed external inductance La = 34 mH
・If Hand Held Terminal (HHT) is not connected to the power supply lines of the PH202S (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 PH202S (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 35PH + 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.
Application Doc. No.: IKE024-A10 P.4-1 to P.4-2
IM 12B07D02-01E
2-10 Specification
_
_
N
N

2-7. Control Drawing of PH202S mA HART® Specification (FM Non-incendive design).

onincendive design FM C lass I, Div.2, Group ABCD, T 4 for ambient temp. < 55°C T6 for ambient temp. < 40°C PH202S transmitter
FM A pproved
power supply
Voc ≦ 31.5 VDC
+
G
Sensor(s) terminals 11-1 7 Ma x. cablelength: 60 mtr. Cable dia. : 3…12 mm.
For electrical d ata: see text below.
Classified Location Unclassified Location
onincendive design FM C lass I, D iv.2, G rou p A B C D , T4 fo r a m bie nt te m p. < 55 °C T 6 fo r a m b ient te m p . < 40 ° C PH202S transmitter
Functional earth
+
G
Sensor(s) terminals 11-1 7 Ma x. cablelength: 60 mtr. Cable dia.: 3…12 mm
For electrical data: see text below.
Classified Location
Functional earth
・Electrical data of the PH202S.
- Supply circuit (terminals + and -): Maximum input voltage V
= 31.5 V. Maximum input power P
max
Effective internal capacitance Ci = 22 nF Effective internal inductance Li = 35 μH
- Sensor input circuit (terminals 11 through 17):
Maximum output voltage V
= 14.4 V. Maximum output current It = 32.3 mA.
t
Maximum allowed external capacitance C Maximum allowed external inductance L
= 2.29PF.
a
= 64.96mH.
a
Load
Resistance
FM A pproved
power supply
Voc ≦ 31.5 V D C
+
-
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.: IKE024-A10 P.4-3 to P.4-4
IM 12B07D02-01E

2-8. Control Drawing of PH202S mA HART® Specification (CSA).

_
_
_
_
Specification 2-11
Sen so r(s) terminals 11-17
Sen sor (s) term inals 11-17
Intr ins ically s a fe des ig n CSA Ex ia Class I, Div.1, Group ABCD
T4 fo r a m bie nt te m p . < 5 5 °C
PH202S
T6 fo r a m bie nt te m p . < 4 0 °C
(pH/O R P -tra n sm itte r)
+
G
For electrical data: see text below.
Hazardous area S afe area
Intr ins ically s a fe des ig n CSA Ex ia Class I, Div.1, Group ABCD
T4 fo r a m bie nt te m p . < 5 5 °C
PH202S
T6 for a m b ient te mp . < 4 0° C
(pH/O R P -tra n sm itte r)
Functional earth
+
G
For electrical data: see text below.
Hazardous area
Functional earth
Functional earth
CSA certified
safety ba rrier or p o w er s up p ly
(HA R T com p a tible )
Suitable values are: Vmax = 31.5 VoltDC Imax = 100 mA
Load
Resistance
CSA certified Power Supply (HA R T comp a tible ) )
+
Suitable values are:
Vmax = 31.5 VoltDC Imax = 100 mA Pmax = 1.2 Watt
Safe area
24 volts DC Nominal
Supply V o lta g e .
+
Output
Supply
・Sensor(s) are thermocouples, RTD’s, passive resistive switch devices, or are CSA entity approved
and meet connection requirements.
・Electrical data of the PH202S.
- 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 PH.
- Sensor input circuit (terminals 11 through 17): Maximum output voltage Voc = 14.4 V. Maximum output current Isc = 32.3 mA. Maximum allowed external capacitance Ca = 600 nF Maximum allowed external inductance La = 34 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 17) is non-incendive having the parameters : Maximum output voltage Voc = 14.4 V. Maximum output current Isc = 32.3 mA. Maximum allowed external capacitance Ca = 3.5 PF. Maximum allowed external inductance La = 76 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 12B07D02-01E
2-12 Specification

2-9. Control Drawing of PH202S FF/PB Specification (IECEx)

Ex ia IIC T4 fo r ambien t temp. d 55 qC Ui = 24 V or U i = 17,5 V Ii = 250 mA Ii= 380 mA Pi = 1,2 W Pi = 5,32 W
PH202S-F
or PH202S-P
+
-
Sensor
Connections
Safe area
Apparatus
+
-
Safe area
I.S.
interface
I.S.
certified
Terminator
+
Transm itter
Zone 0 or 1
Hazardous area
-
x Sensor(s) are of a passive type to be regarded as 'simple apparatus'.
x Electrical data of the PH202S-F & PH202S-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.
+
Transm itter
I.S.
certified
Terminator
-
- Sensor input circuit:
Maximum output voltage Uo=14.4 V; Maximum output current Io=32.3 mA
Maximum allowed external capacitance Co=600 nF
Maximum allowed external inductance Lo=34 mH
x Any I.S. interface may be used that meets the following requirements:
FISCO power supply Uo d 24 V or Uo d 17.5 V Io d 250 mA Io d 380 mA Po d 1.2 W Po d 5.32 W Co t 220 pF + Ccable; Lo t 0
H + Lcable
x Electrical data of the PH202S-B & PH202S-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
- Sensor input circuit:
Maximum output voltage Uo=14.4 V; Maximum output current Io=32.3 mA
Maximum allowed external capacitance Co = 3.5
F
Maximum allowed external inductance Lo = 76 mH
IM 12B07D02-01E
H.

2-10. Control Drawing of PH202S 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
PH202S-F
or PH202S-P
-
+
Specification 2-13
Sensor
Connections
Safe area
Apparatus
x
Sensor(s) are of a passive type to be regarded as 'simple apparatus'.
+
-
I.S.
interface
Safe area
I.S.
certified
Terminator
+
Transmitter
Zone 0 or 1
Hazardous area
-
Electrical data of the PH202S-F & PH202S-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.
+
Transmitter
I.S.
certified
Terminator
-
- Sensor input circuit: Maximum output voltage Uo=14.4V; Maximum output current Io=32.3 mA Maximum allowed external capacitance Co=600 nF Maximum allowed external inductance Lo=34 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
Co t 220 pF + Ccable; Lo t 0 H + Lcable
or
FISCO power supply
Uo d 17.5 V Io d 380 mA Po d 5.32 W
Co t 220 pF + Ccable; Lo t 0 H + Lcable
Electrical data of the PH202S-B & PH202S-D (Type of protection “n”)
x
- Supply and output circuit: Maximum input voltage Ui = 32 V
Effective internal capacitance Ci= 220pF; Effective internal inductance Li= 0 H.
- Sensor input circuit: Maximum output voltage Uo=14.4 V; Maximum output current Io=32.3 mA Maximum allowed external capacitance Co = 3.5 F Maximum allowed external inductance Lo = 76 mH
IM 12B07D02-01E
2-14 Specification

2-11. Control Drawing of PH202S FF/PB Specification (FM Intrinsically safe Entity).

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
PH202S-F
or PH202S-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
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 PH202S-F & PH202S-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 = 32.3 mA
Maximum allowed external capacitance Ca = 600 nF
Maximum allowed external inductance La = 34 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
H + 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.
In case of using cable glands in Outdoor location, they shall be UV rated or made of metal.
x
IM 12B07D02-01E
Specification 2-15
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.
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.: IKE025-A10 P.4 to P.5
IM 12B07D02-01E
2-16 Specification

2-12. Control Drawing of PH202S FF/PB Specification (FM Intrinsically safe FISCO)

FM Approved FISCO barrier
Voc (Vt) d17,5 V Ioc (It) d380 mA Poc (Pt) d5,32 W
FM Class I, DIV. 1, Group ABCD T4 for ambient temp. d 55 qC
PH202S-F
or PH202S-P
-
+
FM Approved Terminator
-
R = 90..100 C = 0..2,2 F
-
+
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 J, or are FM Approvals entity approved and meet connection requirements.
x Electrical data of the PH202S-F & PH202S-P:
- Supply circuit: Ui = 17.5 V; Ii = 380 mA; Pi = 5.32 W; Ci = 220 pF; Li = 0 H.
- Sensor input circuit: Vt = 14.4 V; It = 32.3 mA; Ca =600 nF; La = 34 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 5 nF and 10 H respectively.
IM 12B07D02-01E
Specification 2-17
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 50A 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.: IKE025-A10 P.6 to P.7
IM 12B07D02-01E
2-18 Specification

2-13. Control Drawing of PH202S FF/PB Specification (FM Non-incendive Entity).

FM Class I, DIV. 2, Group ABCD
FM Approved Power Supply
Voc d 32 VDC
+
T4 for ambient temp. d 55 qC T6 for ambient temp. d 40 qC
PH202S-B
or PH202S-D
-
+
FM Approved Terminator R = 90..100
-
C = 0..2,2 F
-
+
Transmitter
Sensor Connections Max. cablelength: 60 mtr. Cable dia.: 3…12 mm.
Sensor
Connections
-
+
Transmitter
Division 2
Unclassified Location
Classified Location
FM Approved Terminator R = 90..100 C = 0..2,2 F
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 J, or are FM Approvals entity approved and meet connection requirements.
x Electrical data of the PH202S-B & PH202S-D:
- Supply circuit: Vmax=32 V; Pi=1.2 W; Ci= 220 pF; Li= 0 H
- Sensor input circuit: Vt=14.4 V; It=32.3 mA; Ca=2.29
PF; La=64.96 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.: IKE025-A10 P.8
IM 12B07D02-01E
Specification 2-19

2-14. Control Drawing of PH202S 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 temp. d 55 qC T6 for ambient temp. d 40 qC
PH202S-B
or PH202S-D
-
+
FM Approved Terminator R = 90..100
-
C = 0..2,2 F
-
+
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
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 PH202S-B & PH202S-D:
- Supply circuit: Vmax=32 V; Pi=5.32 W; Ci= 220 pF; Li= 0 H
- Sensor input circuit: Vt=14.4 V; It=32.3 mA; Ca = 2.29 F; La = 64.96 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.: IKE025-A10 P.9
IM 12B07D02-01E
2-20 Specification

2-15. Control Drawing of PH202S 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
PH202S-F
or PH202S-P
-
+
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 PH202S-F & PH202S-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 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 = 32.3 mA
Maximum allowed external capacitance Co = 600 nF
Maximum allowed external inductance Lo = 34 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
Uo d 17.5 V
Io x 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 PH202S-B & PH202S-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 = 32.3 mA
Maximum allowed external capacitance Co = 3.5 F
Maximum allowed external inductance Lo = 76 mH
IM 12B07D02-01E
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 50 meters (162 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)
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)
Panel mounting bracket
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
(7.28)
(8.07)
5.eps
IM 12B07D02-01E
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 12B07D02-01E
Installation and wiring 3-3

3-2. Preparation

Refer to figure 3-4. The power/output connections and the sensor connections should be made in accordance with the diagram on page 3-6. The terminals are of a plug in style for ease of mounting.
To open the EXA 202 for wiring:
1. Loosen the four frontplate screws and remove the cover.
2. The terminal strip is now visible.
3. Connect the power supply. Use the gland on the left for this cable.
4. Connect the sensor input, using the gland on the right (see fig. 3-5). Switch on the power.
Commission the instrument as required or use the default settings.
5. Replace the cover and secure frontplate with the four screws.
6. Connect the grounding terminals tp 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 PH202 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 12B07D02-01E
3-4 Installation and wiring
12
180
100
0
NO MODEYES
>
ENT
>
FAILHOLD
YES
NO
ENT
MEASURE
MAN.CAL DISPLAY
HOLD
YOKOGAWA
MODE
TEMP
AUT.CAL
TEMP.MAN.
pH
Computer
Distributor
Hand Held
Communicator
Output/supply Input
2 , 5 or 10 m
CURRENT
OUTPUT
Sensors
Recorder
Safety Barrier
PH202S only
ref pH/ORP emp.
Figure 3-6. System configuration
3-3. Wiring of sensors

3-3-1. General precautions

Generally, transmission of signals from pH sensors is at a very low voltage and high impedance level. Thus a lot of care must be taken to avoid interference. Before connecting sensor cables to the transmit­ter make sure that next conditions are met:
– the sensor cables are not mounted in tracks together with high voltage and or power switching
cables – only standard coaxial electrode cables or extension cable are used – the transmitter is mounted within the distance of the sensor cables (max. 10 m) – 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
Make sure that the total of capacitance and inductances connected to the input terminals of the EXA PH202S 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 PH202S instrument can be mounted in Zone 0 or 1 (PH202S-B, -N,
-D).
– 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
PH202S 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 12B07D02-01E
Installation and wiring 3-5

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

The EXA PH202S-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

3-3-4. Liquid earth

In all circumstances, the sensor side of the measuring loop must be grounded to the measuring liquid. The EXA PH202S uses advanced differential high impedance input circuits. This technique calls for a grounding to the liquid. In addition to that the sensor checking circuits also use the liquid earth for meas­urement of impedance of the sensors. All Yokogawa fittings have provisions for this connection. It is usu­ally called liquid earth in all our manuals. A separate connection should be made to the terminal numbered 14 in all cases to get a proper and sta­ble measuring loop.
3-3-5. Access to terminal and cable entry
1. To access terminals remove the front cover of the EXA PH202S by releasing the 4 captive screws.
2. Thread the sensor cables into the connection space and connect the cables to the terminals as indicated in the wiring diagram. Make sure all connections are firm and do not touch each other.
3. Screw the gland securely and tighten it to keep out moisture. DO NOT use a wrench to tighten the nut.
4. The optional hose connection is used to guide the cables coming from an immersion fitting through a protective plastic tubing to the transmitter.

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 mm 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.
IM 12B07D02-01E
3-6 Installation and wiring

3-4-2. Connection of the power supply

The terminal strip is accessed as was described in §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 3-8 and 3-9.

3-4-3. Switching the instrument on

After all connections are made and checked, the power can be switched on from the distributor. Observe the correct activation of the instrument at the display. If for any reason the display does not indicate a value, consult the trouble shooting section.
11 12 14 17 13 15 16HI G H I M PLOW IM P
TEMP LE INPUT 2 INPUT 1
rd bl
bk
temp.
Colour code
rd
red
=
bl
blue
=
bk
black
=
wt
white
=
SINGLE ELECTRODES
Green
Fig. 3-7. Connection diagrams
bl rd
ref
link
Yellow
pH/ORP
rd bl
Red
Colour code
rd
red
=
bl
blue
=
bk
black
=
wt
white
=
COMBINED ELECTRODES
11 12 14 17 13 15 16HI G H I M PLOW IM P
TEMP LE INPUT 2 INPUT 1
bl
rd
Green
bk
temp.
link
rd
Combi pH/Ref
Combi
ORP/Ref
Orp/Ref
wtbl
Blue
IM 12B07D02-01E
Installation and wiring 3-7

3-5. Wiring the sensor system

3-5-1. Impedance measurement jumper settings

NOTE:
It is important to decide first which application and which settings are appropriate for the
installation. This decision is best made before the jumpers are installed, because the cables will rest beside the jumpers in their installed positions.
Table 3-1. Impedance measuring jumpers
Figure no. Jumper Settings Jumper Settings Application & Sensor Connections
Input #1 Input #2
1 High Impedance Low Impedance Normal pH sensors
Glass sensor on Input #1
Reference sensor on Input #2
2 High Impedance High Impedance Special electrodes using
2 glass sensors
(e.g. Pfaudler 18)
3 Low Impedance High Impedance ORP (pH compensated) and/or rH
metal sensor on Input #1
pH glass (as reference) on Input #2
4 Low Impedance Low Impedance ORP (Redox measurement)
metal sensor on Input #1
Normal reference on Input #2
For convenience insulated jumper links are provided. Ordinary wire links can also be used, and are just as effective.
The following four jumper figure illustrations (figure 3-8) show the jumper positions related to the figure numbers in the above table.
1
2
3
SUPPLY TEMP LE
SUPPLY TEMP LE INPUT 2 INPUT 1
SUPPLY TEMP LE
11 12 14 17 13 15 16
11 12 14 17 13 15 16
11 12 14 17 13 15 16
INPUT 2
INPUT 2
HIGH IMPLOW IMP
INPUT 1
HIGH IMPLOW IMP
HIGH IMPLOW IMP
INPUT 1
Setting on shipment
4
SUPPLY TEMP LE
Fig. 3-8. Jumper positions
11 12 14 17 13 15 16
INPUT 2 INPUT 1
HIGH IMPLOW IMP
IM 12B07D02-01E
3-8 Installation and wiring
Figure 3-9. Terminal identification labels

3-6. Sensor wiring

Refer to figure 3-10, which includes drawings that outline sensor wiring. For sensor wiring of PH8EFP, PH8ERP, PH8EHP, OR8EFG, OR8ERG, HA405, HA406, HA485, DPA405, DPA406, DPA485, HF405, DPAS405, DPAS485 and FU20, see APPENDIX 2 (Chapter 11).
The EXA analyzers can be used with a wide range of commercially available sensor types, both from Yokogawa and other manufacturers. The sensor systems from Yokogawa fall into two categories; the ones that use a fixed cable and the ones with separate cables.
To connect sensors with fixed cables, simply match the terminal numbers in the instrument with the iden­tification numbers in the instrument on the cable ends.
The separate sensors and cables are not numbered, but instead use a color-coding system. The elec­trodes have a colored band incorporated in the label on the connection cap:
• Red for measuring electrodes (both pH and ORP)
• Yellow for reference electrodes
• Blue for combined sensors with both measuring and reference elements in the same body
• Green for temperature sensors
The recommended procedure is to color-code each end of the cables to match the sensors with the color strips provided with each cable. This provides a quick way to identify the ends of the cables belonging to a particular sensor when they are installed. (The procedure for fixing the identification labels is described in detail in the instruction sheet provided with the cable.)
IM 12B07D02-01E
Installation and wiring 3-9

3-6-1. Connection cable

There are two types of connection cable, one for single sensors and one for combined sensors. The former is a coaxial cable and has only two connections.
• Red to measuring element
• Blue to screen (shield)
The latter is a triaxial cable with three connections, (it has an extra white wire termination) these wires are connected:
• Red to measuring element
• Blue to reference
• White to screen (shield)
To connect the other sensor systems, follow the general pattern of the terminal connections as listed below:
11 & 12 Temperature compensation resistor input 13 Input no. 2 (normally the reference element) 17 Screen (shield) for input no. 2 14 Liquid earth (solution ground) connection 15 Input no. 1 (normally the measuring element) 16 Screen (shield) for input no. 1
Green
Green
*
Yellow
*
*
Red
Blue
Red
Blue
Red
Black
Red
*
Blue Blue
Cable markers
*
Red Blue Blue Black
*
Red White
*
pH transmitter
11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Glass (measure) 16 Shield 17 Shield
11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Glass (measure) 16 Shield 17 Shield
Cable markers
FU20/FU25 4-in one sensor
Note: Connect cables to similarly marked
terminals: 11 to 11, 12 to 12, etc.
Retractable sensor assembly PR20
(Also PD20, PF20 & PS20)
11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Glass (measure) 16 Shield 17
11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Glass (measure) 16 Shield 17 Shield
Combined pH/ref sensors
Figure 3-10a. Sensor wiring
NOTE:
Connect cables to similarly marked terminals: 11 to 11, 12 to 12, etc.
IM 12B07D02-01E
3-10 Installation and wiring
Yellow
*
Red
11 Temperature
Red
Black
Red
*
Blue
Blue
ORP/rH wiring
Note: ORP and or rH setting in service
12 Temperature 13 Reference 14 Solution ground 15 Metal (measure) 16 Shield 17 Shield
Cable markers
*
Separate electrodes
ORP/REF electrode
11 Temperature 12 Temperature 13 Reference 14 Solution ground(ORP) 15 pH 16 Shield 17
code 02.
Blue
Blue
*
Red
White
*
Cable markers
Combined ORP/pH electrode
Notes
1. A temperature sensor maybe
connected to 11 & 12, for
temperature indication.
2. See section 5-3-1 for
impedance checking of glass
reference sensors.
11 Temperature 12 Temperature 13 Reference 14 Solution ground 15 Metal (measure) 16 Shield 17 Shield
Figure 3-10b. Sensor wiring

3-6-2. Sensor cable connection with special grommet

In order to seal multiple sensor cables into EXA, a special grommet is provided that is designed to accommodate one, two or three sensor cables (5 mm dia.) plus a liquid earth cable (2.5 mm dia.). In the pack with the grommet are blanking pieces to close any unused holes. When correctly assembled, the grommet maintains the IP65, NEMA 4X rating of the EXA PH202 housing.
Refer to figure 3-5 to assemble the grommet connections:
1. First remove the nut and standard rubber seal from the selected gland
2. Discard the seal. This will be replaced later by the special grommet
3. Thread the cables through the nut and the gland
4. Connect the cables to their designated terminals
5. Arrange the cables to avoid tangles and insert the grommet between the gland and the nut
6. The grommet is split to permit the cables to be mounted after connection. (This also ensures even length adjustment.)
7. Ensure that any unused holes are filled with the blanking pieces
8. Tighten the nut to form a firm seal. (Hand-tight is sufficient.)
NOTE:
The special gland is intended to be used to seal the multiple cables from the Yokogawa flow
fittings such as FF20 and FP20. The designated cables are WU20 sensor cables, which are approximately 5 mm (0.2") in diameter, and 82895002 liquid earth cables, which are approximately
2.5 mm (0.1") in diameter.
For sensor systems using a single cable, like the FU20 (FU25) and the PR20, PD20, PF20 and PS20, the standard gland will accommodate the cable adequately. Single cables between approximately 6 mm and 12 mm (0.28" and 0.47") can be sealed properly with these glands.
IM 12B07D02-01E
Installation and wiring 3-11
p

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

For the WTB10 terminal box, see APPENDIX. 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 50 metres (e.g. 5 m fixed cable and 45 m extension cable). In the case of systems using dual high impedance sensors (e.g. Pfaudler 18), then the cable length is restricted to 20 metres (fixed cable only, no extension with WF10).
EXA pH TRANSMITTER / CONVERTER
11
12
13
14
15
16
17
17 (overall screen)
Co-axial cable
(brown)
17
1314141615
12
11
11 Red
12 Blue
15
14 16
14
17
13
12
11
15 Core 16 Screen White Co-axial cable
17 Overall Screen
13 Core 14 Screen Brown Co-axial Cable
Co-axial cable
(white)
15 (core)
16 (screen)
WF10 Cable
12 (blue)
13 (core)
14 (screen)
11 (red)
Fig. 3-11. Connection of WF10 extension cable and BA10/BP10 junction box
NOTE: See page 3-12 for termination for WF10 cable in combination with EXA pH.

3-6-4. Connection VP type sensor

> Con n ect i on s n o rm a l
pH
ref
H
A-15 B-13 C­D-14 E-11 F-12 S-3 or 63
LE
temp
11
12
13
14
15
16
17
> Connecti ons differential pH
A-15 B-14 C-13 D-17 E-11
pH
pH ref
LE
temp
F-12 S-3 or 63
IM 12B07D02-01E
3-12 Installation and wiring
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
Fig. 3-12a.
9 cm
remove insulation
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. 3-12b.
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 the 2 coaxial screens with suitable plastic tubing.
7. Strip and terminate all ends with suitable (crimp) terminals and identify with numbers as shown.
11 12
17
15
16 13
14
Fig. 3-12c.
8. Finally shrink the overall heat shrink tube into position.
IM 12B07D02-01E
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 *SERV. 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 10.
Table 4-1. Operations overview
Routine Function Chapter
Maintenance AUT.CAL Calibration with programmed buffer solutions 6
MAN.CAL Calibration with other buffer solutions 6
SAMPLE Grab sample calibration 6
DISP Read auxiliary data or set message display 4
MAN.IMP Manual start of impedance check 5
TEMP Select automatic or manual compensation 5
HOLD Switch hold on/off (when activated) 5
Commissioning *OUTP Adjust the output range 5
mAmA
*HOLD Activate the hold function 5
Service *SERV Fine tune the specialized functions of the transmitter 5
(Access to coded entries
from the commissioning
level)
NOTE:
All three levels may be separately protected by a password. See Service Code 52 in chapter 5
Service Code table for details on setting passwords.
IM 12B07D02-01E
4-2 Operation
Output hold flag
Units
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
Figure 4-1. PH202 operator interface
Manual temperature compensation flag
HOLD FAIL
TEMP.MAN.
pH
mV
YES NO
NO MODEYES
Fail flag
MODE
MEASURE AUT.CAL MAN.CAL DISPLAY
ENT
TEMP HOLD
ENT
YOKOGAWA
Menu pointer flags
Commissioning function menu
OUTPUT SET HOLD SERVICE WASH
Commissioning mode access key
Measure/Maintenance mode key
Broken line indicates area that can be seen through front cover

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.
AUT.CAL MAN.CAL DISP SETPOINT WASH MAN.IMP TEMP HOLD 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 > & ^ keys, press ENT to confirm
the data entry. Please note that the EXA does not register any change of data until the ENT key is pressed.
key This is the commissioning mode key. It is used to obtain access to the commissioning
*
menu. This can only be done with the cover removed or opened. Once this button has
been used to initiate the commissioning menu, follow the prompts and use the other
keys as described above.
IM 12B07D02-01E
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. For instance the impedance measurement screens do not appear when impedance checking is switched off in service codes 03 and 04.
IM 12B07D02-01E
4-4 Operation4-4 Operation

4-5. Display functions

4-5-1. Display functions pH (default)

pH
MEASURE AUT.CAL MAN.CAL DISPLAY TEMP. HOLD
MODE
pH
Display Access
pH
YES NO
NO
pH
YES NO
AUT.CAL
YES
YES
MAN.CAL
(See Auto calibration Chapter 6)
(See Manual calibration Chapter 6)
Impedance of input 1
pH
Impedance of input 2
NO
pH
(See Sample
YES
calibration
YES
MAN.CAL
NO
Chapter 6)
Software release number
pH
NO
pH
pH
YES
NO
YES
NO
YES
NO
DISPLAY
NO
DISPLAY
NO
DISPLAY
NO
YES
YES
NO
DISPLAY
Process temperature
NO
pH
(See Manual
YES
YES
NO
Impedance check Chapter 5)
Current output
pH
NO
YES
NO
YES
NO
DISPLAY
NO
NO
DISPLAY
NO
pH
TEMP.MAN.
HOLD FAIL
pH
mV
IM 12B07D02-01E
NO
YES NO
NO MODEYES
YES NO
YOKOGAWA
pH
(See Temp
YES
TEMP.
menu Chapter 5)
Offset (as. pot. or zero point)
YES
DISPLAY
NO
NO
MODE
Efficiency
MEASURE AUT.CAL MAN.CAL DISPLAY
ENT
TEMP HOLD
ENT
OUTPUT SET HOLD SERVICE
(slope)
Press YES to fix
the selected second
line of display
pH
NO
DISPLAY
12C6C3-20-1.ai
YES

4-5-2. Display functions pH (ORP)

pH
MEASURE
AUT.CAL
MAN.CAL DISPLAY TEMP.
HOLD
MODE
Operation 4-5
Service Code 01 Set for pH. Service Code 02 Set for ORP on parameter 2.
mA
pH
AUT.CAL
NO
YES
YES
NO
pH
NO
YES
MAN.CAL
NO
pH
NO
YES
NO
Measuring
pH
Mode
pH
NO
YES
DISPLAY
NO
pH
NO
YES
DISPLAY
NO
pH
NO
YES
mA
DISPLAY
NO
pH
pH
"Logbook Scrolling"
Logbook data is available
only in instruments with
"PIN" for advanced function
The display can give information
about calibrations performed
with date and time.
The example below shows
Asymmetry Potential.
Scrolling of Data is also
available on Slope.
As Pot ORP Impedance Input 1 Impedance Input 2
When these functions
are enabled in Service
Codes.
pH
YES
NO
YES
DISPLAY
NO
pH
As Pot
Display 2
See Man. Imp. Check chapter 5
pH
YES NO
NO
ENT
DISPLAY
YES
YES
NO
NO
pH
See Temp Menu chapter 5
pH
YES NO
NO
ENT
DISPLAY
YES
NO
YES
NO
pH
TEMP.
See Hold Menu chapter 5
pH
YES NO
NO
ENT
DISPLAY
YES
NO
YES
HOLD
NO
pH
YES NO
NO
ENT
DISPLAY
NO
DATE
NO
TIME
NO
CAL -1
NO
VAL UE
NO
YES
DISPLAY
YES
pH
NO
YES
DISPLAY
YES
pH
NO
YES
DISPLAY
YES
pH
NO
YES
DISPLAY
YES
YES
YES NO
ENT
DISPLAY
YES
NO
Back to the Top
pH
NO
YES
DISPLAY
pH
NO
YES
DISPLAY
YES
IM 12B07D02-01E
4-6 Operation

4-5-3. Display functions pH (rH)

Service Code 01 Set for pH. Service Code 02 Set to rH on parameter 2.
pH
MEASURE
AUT.CAL
MAN.CAL DISPLAY TEMP.
HOLD
Temp Display
MODE
pH
YES
NO
YES
AUT.CAL
See Auto Cal Chapter 6
rH Display
NO
pH
YES
YES
NO
MAN.CAL
See Man Cal Chapter 6
Current
Output
NO
pH
YES
YES NO
See Man Cal Chapter 6
As Pot
pH Sensor
NO
pH
pH
NO
YES
DISPLAY
NO
pH
YES
NO
DISPLAY
NO
pH
mA
YES
NO
NO
pH
YES
NO
NO
pH
DISPLAY
DISPLAY
YES
YES NO
NO
DISPLAY
Slope
pH Sensor
YES
NO
DISPLAY
NO
mA
pH
YES
YES
NO
See Man. Imp. check Chapter 5
As Pot ORP
NO
pH
YES
YES NO
TEMP.
NO
pH
YES
YES NO
HOLD
NO
See Temp Menu Chapter 5
See Hold Menu Chapter 5
Impedance
Input 1
Impedance
Input 2
Software
Release
Version
pH
mV
YES
NO
DISPLAY
NO
pH
mV
YES
NO
DISPLAY
NO
pH
YES
NO
DISPLAY
NO
pH
YES
NO
DISPLAY
NO
IM 12B07D02-01E
Parameter setting 5-1

5. PARAMETER SETTING

5-1. Maintenance mode

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 cover. Press the MODE-key once to enter this dialog mode.
Note:
At this stage the user will be prompted for pass code where this has been previously set up in
service code 52 in chapter 5.
Automatic calibration See “calibration” section 6. (AUT.CAL) Manual calibration See “calibration” section 6. (MAN.CAL) Sample calibration See “calibration” section 6. (SAMPLE) Display setting See “operation” section 4. (DISP) Manual impedance check See “parameter setting” §5-1-4 and §5-3-5 code 51. (MAN.IMP) Temperature Set automatic or manual compensation and adjust manual reading
(TEMP)
(when pH is set in section 5 service code 01). See adjustment proce­dure in §5-1-1. Set automatic reading (when ORP is set in Section 5, service code 01). See adjustment procedure §5-1-2.
Hold Manually switch on/off HOLD (when enabled in commissioning menu
mAmA
(HOLD)
section). See adjustment procedure in §5-1-3.
IM12B07D02-01E
5-2 Parameter setting

5-1-1. Manual temperature selection and adjustment

pH selected in service code 01.
MODE
FAIL
pH
pH
NO MODEYES
MODE
YES
NO
ENT
YOKOGAWA
NO
NO
NO
NO
Measure
AUT.CAL
OUTPUT SET HOLD SERVICE
pH
YES
pH
YES
YES
NO
TEMP.
NO
NO
pH
YES
NO
YES
TEMP.MAN.
Use
ENT
keys to
adjust and enter manual temperature setting
IM12B07D02-01E

5-1-2. Process temperature measuring in ORP mode

ORP selected in service code 01.
MODE
Parameter setting 5-3
mV
NO
mV
NO
NO
NO MODEYES
MODE
YES
NO
MEASURE
ENT
YOKOGAWA
MAN.CAL
OUTPUT SET HOLD SERVICE
YES
mV
YES
YES NO
TEMP.
NO
Display return to measuring mode with temperature reading.
mV
mV
YES
YES
YES NO
NO
NO
MEASURE
mV
YES
NO
IM12B07D02-01E
5-4 Parameter setting
5-1-3. Manual activation of HOLD
mA
pH
MODE
MEASURE
NO MODEYES
ENT
OUTPUT SET HOLD SERVICE
YOKOGAWA
MODE
pH
YES
NO
AUT.CAL
NO
HOLD
pH
YES
NO
NO
NO
NO
NO
pH
YES
YES
NO
pH pH
YES
YES
NO
HOLD
NO
YES
MEASURE
Note: The HOLD feature must first be activated in the commissioning mode section 5-2-2.
IM12B07D02-01E

5-1-4. Manual impedance check

MODE
pH
MEASURE
NO MODEYES
ENT
YOKOGAWA
MODE
pH
OUTPUT SET HOLD SERVICE
Parameter setting 5-5
Note: The manual impedance start is available when the sensor impedance measurement is enabled in Service Code 3 and 4. This enables the impedance data to be updated immediately after a maintenance event (e.g.replacing an electrode).
YES
NO
AUT.CAL
NO
NO
NO
pH
YES
YES
NO
pH
NO
YES
NO
YES
pH
YES
NO
Return to measuring
mode after updating
impedance check
IM12B07D02-01E
5-6 Parameter setting

5-2. Commissioning mode

In order to obtain peak performance from the EXA, you must set it up for each custom application.
Output range mA output is set as default to 0 - 14 pH.
mA
(*OUTP) For enhanced resolution in more stable measuring processes, it may be desir-
able to select 5 - 10 pH range, for example. Service codes 31 and 35 can be used to choose output function on mA output.
mA
Hold The EXA transmitter has the ability to “hold” the output during maintenance peri-
(*HOLD)
Service This selection provides access to the service menu.
(*SERV)
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.
ods. This parameter should be set up to hold the last measured value, or a fixed value to suit the process.
IM12B07D02-01E
5-2-1. Output range
mA
Parameter setting 5-7
pH
NO MODEYES
MODE
MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD
ENT
YOKOGAWA
OUTPUT SET HOLD SERVICE
Note: When rH or ORP is enabled in codes 02 and 31, the output range is set in a similar way to pH.
pH
ENT
pH
ENT
pH
ENT
YES
NO
YES
NO
YES
NO
YES
YES
NO
NO
pH
ENT
YES
pH
NO
ENT
pH
ENT
ENT
pH
NO
ENT
pH
ENT
IM12B07D02-01E
5-8 Parameter setting
5-2-2. Hold
mA
pH
NO MODEYES
MODE
MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD
ENT
YOKOGAWA
OUTPUT SET HOLD SERVICE
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
NO
HOLD deactivated, return to commissioning menu.
YES
YES NO
NO
HOLD
YES
NO
YES
NO
NO
YES
HOLD
IM12B07D02-01E
YES
HOLD active last measured value.
Parameter setting 5-9
HOLD
HOLD
HOLD
ENT
ENT
HOLD value set, return to commissioning menu.
HOLD
ENT
YES
NO
YES
Set HOLD "fixed value" for mA output
ENT
IM12B07D02-01E
12B6C3 29
Service
5-10 Parameter setting

5-2-3. Service

pH
NO MODEYES
MODE
MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD
ENT
YOKOGAWA
OUTPUT SET HOLD SERVICE
Example: Service Code 01
Select main parameter
for pH
for ORP
With the >, ,ENT keys
>
mA
mA
YES
NO
YES
NO
ENT
ENT
Wait screen is displayed
Wait screen is displayed
briefly before returning
briefly before returning to
to commissionning menu.
commissioning menu.
ENT
NO
NO
ENT
ENT
ENT
NO
IM12B07D02-01E
YES
NO
YES
ENT
Parameter setting 5-11

5-3. Notes for guidance in the use of service coded settings

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 *pH/ORP Choose the main measuring parameter. The option of the ORP input is used
with an inert metal electrode as measuring sensor which gives a reading directly in millivolts. This signal can then be interpreted to give information about the oxidation state of the process solution, and derived information like the absence of a compound (like Cyanide for example which is destroyed in oxidizing solutions).
Code 02 *PRM.2 Enable the use of a second measuring parameter simultaneously with pH (the
main parameter). With the correct sensor (e.g FU20), ORP measurement is possible as parameter 2 With the same sensor, rH measurement is possible as parameter 2, this is calculated from pH and ORP and is a value which gives the oxidizing power of the solution while compensating for the effect of pH.
This function is particularly useful for applications where both the pH and
oxidation-reduction potential of the process need to be known. The availability of both measurements in a single system is convenient.
Note that in both cases a suitable sensor combination is needed to make this
possible. The Yokogawa FU20 (4-in-1) sensor can be used for this purpose, or a combination of individual sensors. Contact your local Yokogawa sales office for advice regarding applications and sensor selection.
Code 03 & 04 *Z1.CHK The EXA PH202 has an impedance check capable of monitoring the impedance & *Z2.CHK of all sorts of sensor systems. In order to “fine tune” this diagnostic tool it is
necessary to set it up to match the sensors used. The default settings give a good setup for a conventional system comprising pH glass sensor and a reference electrode, either as individual electrodes or as a combination style sensor. The impedance limits will need to be adjusted to get the best from systems using heavy duty, or fast response electrodes.
The impedance measuring system has a very wide span requirement. As it can
measure in k and also in G (10
9
) there are hardware switches to set high range (1M to 2 G) or low range (1k to 1M) measuring. As a default the system is set to measure high impedances on input 1 (the one normally used for the pH glass sensor input) and low impedances on input 2 (the one normally used for the reference input). Examples of where these settings need to be changed from the default, are Pfaudler enamel sensors which need two high impedance settings, and Platinum sensors with a standard reference, which need two low impedance settings.
The temperature compensation of the impedance measurement is for conven-
tional pH glass sensors. When other sensors are used, switch this feature off.
Code 05 *CAL.CK The calibration checking feature, when enabled, gives security against entering
wrong calibration data. For example when aged sensors are due for replacement, the EXA flags an error message and prevents a calibration being completed where the subsequent measurement can only exhibit errors and drift.
Limits are set for the maximum permissible Asymmetry potential, and Slope.
IM12B07D02-01E
5-12 Parameter setting
Code Display Function Function detail X Y Z Default values
Parameter specific functions
01 *PH.ORP Select main parameter pH 0 0 pH
ORP 1
02 *PRM.2 Enable 2nd parameter Off 0 0 Off
ORP 1
rH 2
03 *Z1.CHK Impedance check 1 Low 0 1.1.1
High 1 High
Temp comp off 0
Temp comp on 1 On
Imp check off 0
Imp check on 1 On
*Z.L.x Low impedance limit
x = None, K, M or G
>, ^ ENT keys to set the value
*Z.H.x High impedance limit
x=None, K, M or G press YES to select units, then use the
>, ^ ENT keys to set the value
04 *Z2.CHK Impedance check 2 Low 0 0.0.1 Low
High 1
Temp comp off 0 Off
Temp comp on 1
Imp check off 0
Imp check on 1 On
*Z.L.x Low impedance limit
x = None, K, M or G
>, ^ ENT keys to set the value
*Z.H.x High impedance limit
x = None, K, M or G
>, ^ ENT keys to set the value
05 *CAL.CK Calibration check Asymmetry check off 0 1.1
Asymmetry check on 1 On
Slope check off 0
Slope check on 1 On
06-09 Not used
Press NO to step through choice of units,
press YES to select units, then use the
Press NO to step through choice of units,
Press NO to step through choice of units,
press YES to select units, then use the
Press NO to step through choice of units,
press YES to select units, then use the
1 M
1 G
100
200 k
IM12B07D02-01E
Parameter setting 5-13

5-3-2. Temperature compensation and 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 pH 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.
Code 13 *T.COMP Process compensation automatically allows for changes in the pH or ORP
of the process with temperature. The characteristic of each process will be different, and the user should determine if this feature is to be activated, and what compensation figure to choose.
The compensation is given in pH per 10 °C or mV per 10 ºC. The standard temperature is 25°C (fixed value) in setting the temperature
compensation.
Example: For pure water with an alkali dose, (e.g. boiler feed water)
a coefficient of approx. 0.35pH can be expected. However, applications vary and a simple test will determine what if any coefficient is suitable for the process.
IM12B07D02-01E
5-14 Parameter setting
Code Display Function Function detail X Y Z Default values
Temperature measuring and compensation functions
10 *T.SENS Temperature sensor Pt1000 0 0 Pt1000
Pt100 1
3kBalco 2
5k1 3
8k55 4
350 5
6k8 6
PTC10k 7
11 *T.UNIT Display in °C or °F °C 0 0 °C
°F 1
12 *T.ADJ Calibrate temperature Adjust to allow for cable resistance None
13 *T.COMP Set temp comp Compensation for process changes off 0 0 Off
Compensation for process changes on 1
*T.COEF Adjust process TC Set for TC in pH per 10 °C -0.00 pH per
10 °C
14-19 Not used
IM12B07D02-01E
Parameter setting 5-15

5-3-3. Calibration functions

Code 20 *t.SEC & These functions are used to determine the stability level demanded by the *PH EXA as acceptance criteria for the automatic calibration. for general purpose
electrode systems with a fast response. Where heavy duty electrodes are used, or when low temperatures are concerned, these values should be
adjusted.
When adjusting these settings, the longer the time interval and the smaller the
pH change, the more stable will be the reading. However, it is important to bear in mind that the time taken to reach stability is an exponential function, and too ambitious a setting will cause the instrument to wait for a very long time before accepting a calibration.
Code 21 *AS.LOW & Limit values for the drift of an electrode system before an error is signalled *AS.HI when a calibration is done. These default values should be adjusted to suit the
application, this will be especially important with enamel or Antimony probes. In case in service code 27 the Asymmetry Potential is disabled and the Zero Point is used, service code 21 is used for entering the limits of the Zero Point.
*ZP.LOW & Limit values for zero point, if enabled in service code 27. *ZP.HI
Code 22 *SL.LOW & Limit values for acceptable slope (sensitivity) calibrations. *SL.HI
Code 23 *
ITP, *SLOPE
Values can be entered directly in this section. These data can be provided by & *ASP the manufacturer of the probe, or by the users laboratory etc. They are determined independently of the measuring loop. Note: it is not necessary to enter this data in most cases as the EXA
automatically does this while performing a calibration. The feature is used in the case of special electrode systems and where calibration in the process environment is not possible.
Code 24, *
BUF.ID
The following buffer calibration tables are programmed into the EXA. They are
25, & 26 the primary buffer standards according to NIST (formerly NBS) and various other
national standards. We strongly recommend the use of these buffer solutions as they give the best buffer capacity, reliability and accuracy when calibrating.
Table 5-1.
pH 4 pH 7 pH 9 pH 4 pH 7 pH 9
0 °C 4.00 6.98 9.46 45 °C 4.05 6.83 9.04
5 °C 4.00 6.95 9.40 50 °C 4.06 6.83 9.01
10 °C 4.00 6.92 9.33 55 °C 4.08 6.83 8.99
15 °C 4.00 6.90 9.28 60 °C 4.09 6.84 8.96
20 °C 4.00 6.88 9.23 65 °C 4.11 6.84 8.94
25 °C 4.01 6.87 9.18 70 °C 4.13 6.85 8.92
30 °C 4.02 6.85 9.14 75 °C 4.15 6.85 8.90
35 °C 4.02 6.84 9.10 80 °C 4.16 6.86 8.89
40 °C 4.04 6.84 9.07
These tables may be adjusted in the case that the user wishes to use other
calibration solutions. The “name” of the buffer can be changed at the *BUF.ID prompt. The other values can then be adjusted in sequence.
Code 27 *ZERO.P As an alternative to Asymmetry Potential, the Zero point can be used to define
and calibrate the EXA pH unit. Note that this method conforms to the DIN standard for instruments No. IEC 60746-2.
IM12B07D02-01E
5-16 Parameter setting
Code Display Function Function detail X Y Z Default values
Calibration functions
20 *t.SEC Stability check time 5 sec.
*PH Stability check pH 0.02 pH
21 *AS.LOW As Pot low limit -120 mV
(As Pot) *AS.HI As Pot high limit 120 mV
21 *ZP.LOW Zero Point low limit 5.00 pH
(Zero) *ZP.HI Zero Point high limit 9.00 pH
22 *SL.LOW Slope low limit 70 %
*SL.HI Slope high limit 110 %
23 *ITP Set ITP Preset calibration data from manufacturer 7.00 pH
(pH) *SLOPE Set slope or from laboratory determinations. 100 %
*ASP.1D Set As Pot For the main parameter 0.0 mV
Press YES to confirm 0.1 mV resolution,
Select YES/NO
*ASP Set As Pot For the main parameter
*ASPmV Set As Pot ORP For parameter 2 (when activated in
service code 02)
23 *ASP.1D Set As Pot (ORP) For the main parameter
(ORP) Press YES to confirm 0.1 mV resolution,
Select YES/NO
*ASP Set As Pot For the main parameter
24 *BUF.ID Buffer table 4 Buffer tables to NIST (formerly NBS)
25 *BUF.ID Buffer table 7 (see section 10 for table details)
26 *BUF.ID Buffer table 9 User adjustable for special requirements
27 *ZERO.P Enable zero point in Disable zero point (enable As Pot) 0 0 Disabled
pH units Enable zero point (disable As Pot) 1
28-29 Not used
then set value with >, ^, ENT keys.
Press NO to change to *ASP.
Press YES to confirm 1 mV resolution,
then set value with >, ^, ENT keys.
then set value with >, ^, ENT keys.
Press NO to change to *ASP.
Press YES to confirm 1 mV resolution,
then set value with >, ^, ENT keys.
mV
IM12B07D02-01E
500
0
- 200
Fig. 5-1.
0
0 mV
pH
mV
As pot
ITP
0 °C
10 °C
25 °C
7
ITP
Zero Point
pH
14
Parameter setting 5-17
5-3-4. mA output functions
mA
Code 31 *OUTP.F When pH is set in code 01 as the main parameter, the output functions may be
set as follows:­ 0: pH 1: pH (table) 2: Parameter 2 (ORP or rH as set in code 02) When ORP is set in code 01 as the main parameter, the output functions may
be set to: 0: ORP 1: ORP (table)
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
signalling 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 linearise the
output with a mA curve.
Table 5-2.
4-20 mA 4-20 mA
0% 4.0 mA 50% 12.0 mA
5% 4.8 mA 55% 12.8 mA
10% 5.6 mA 60% 13.6 mA
15% 6.4 mA 65% 14.4 mA
20% 7.2 mA 70% 15.2 mA
25% 8.0 mA 75% 16.0 mA
30% 8.8 mA 80% 16.8 mA
35% 9.6 mA 85% 17.6 mA
40% 10.4 mA 90% 18.4 mA
45% 11.2 mA 95% 19.2 mA
100% 20.0 mA
IM12B07D02-01E
5-18 Parameter setting
Code Display Function Function detail X Y Z Default values
mA
mA Outputs
30 Not used
31 *OUTP.F mA output functions pH 0 0
Code 01 set for pH pH (table) 1
Parameter 2 (with suitable sensor(s), 2
and when enabled in code 02)
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% Linearisation table for mA1 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.
...
*90% be skipped, and a linear interpolation will
*100% take place.
36-39 Not used
Where a value is not known, that value may
IM12B07D02-01E
Parameter setting 5-19

5-3-5. 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 51 *MODE The manual impedance check (on demand) can be setup for operation in the
maintenance mode. (Through the closed front cover).
Code 52 *PASS Passcodes can be set on any or all of the access levels, to restrict access to
the instrument configuration.
Code 53 *Err.4.1 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 outputs when enabled in code 32.
Soft fail gives a flashing FAIL flag in the display. The call for maintenance is
a good example of where a SOFT fail is useful. A warning that the regular
maintenance is due, should not be used to shut down the whole measurement.
Code 54 Not used
Code 55 *CALL.M Call for maintenance is a trigger to signal that the system has been in service
for longer than the set time without calibration. The user can set up to 250 days
as a routine service interval.
Code 56 *DISP The display resolution can be set to either 0.01pH or 0.1pH. Not applicable to
the ORP (mV) display.
IM12B07D02-01E
5-20 Parameter setting
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 *MODE Mode setup Manual impedance check Off 0 0 Off
Manual impedance check On 1
52 *PASS Passcode Maintenance passcode Off 0 0.0.0 Off
Note # = 0 - 9, where Maintenance passcode On #
0 = no passcode 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.4.1 Error setting Impedance low (input 1) Soft fail 0
Impedance low (input 1) Hard fail 1 1 Hard
*Err.5.1 Impedance high (input 1) Soft fail 0
Impedance high (input 1) Hard fail 1 1 Hard
*Err.4.2 Impedance low (input 2) Soft fail 0
Impedance low (input 2) Hard fail 1 1 Hard
*Err.5.2 Impedance high (input 2) Soft fail 0
Impedance high (input 2) Hard fail 1 1 Hard
*Err.07 Temperature too high Soft fail 0
Temperature too high Hard fail 1 1 Hard
*Err.08 Temperature too low Soft fail 0
Temperature too low Hard fail 1 1 Hard
*Err.09 pH out of range Soft fail 0
pH out of range Hard fail 1 1 Hard
*Err.11 Wash recovery check Soft fail 0 0 Soft
Wash recovery check Hard fail 1
*Err.16 Call for maintenance Soft fail 0 0 Soft
Call for maintenance Hard fail 1
54 Not used
55 *CALL.M Call for maintenance Set time limit for calibration Off 0 0 Off
Set time limit for calibration On 1
Set valid maintenance period if On 250 days
56 *DISP Display resolution Set pH decimal display 0.1 pH 0
Set pH decimal display 0.01pH 1 1 0.01 pH
57-59 Not used
IM12B07D02-01E
Parameter setting 5-21

5-3-6. Communication setup

mA
Code 60 *COMM. The settings should be adjusted to suit the communicating device connected to
the output. The communication can be set to HART® or to PH201*B distributor (for Japanese market only)
*ADDR. Select adress 00 for point to point communication with 4-20 mA transmission.
Address 01 to 15 are used in multi-drop configuration (fixed 4 mA output). For the Yokogawa PC202 software package, the default settings match the
software as shipped.
mA
Code 61 *HOUR The clock/calendar for the logbook is set for current date and time as
reference. *MINUT *SECND *YEAR *MONTH *DAY
Code 62 *ERASE Erase logbook function to clear the recorded data for a fresh start. This may
be desirable when re-commissioning an instrument that has been out of service
for a while.

5-3-7. General

Code 70 *LOAD The load defaults code allows the instrument to be returned to the default set
up with a single operation. This can be useful when wanting to change from
one application to another.
Code 79 *CUST.D Load customer defaults. This code allows the instrument to be returned to the
factory default set, except that buffer tables (code 24,25,26) are unchanged.

5-3-8. 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.
IM12B07D02-01E
5-22 Parameter setting
Code Display Function Function detail X Y Z Default values
Communication
mA
60 *COMM. Communication Set HART® communication Off 0 1.0 On
Set HART® communication On 1
write enable 0 write
write protect 1 enable
Set communication PH201
Without half time check 0
With half time check 1
*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
B 2
*
Code Display Function Function detail X Y Z Default values
General
70 *LOAD Load defaults Reset configuration to default values
71-78 Not used
79 *CUST.D Load Customer Reset configuration to default values
Defaults except buffer tables
Code Display Function Function detail X Y Z Default values
Test and setup mode
80 *TEST Test and setup Not used
IM12B07D02-01E
Calibration 6-1

6. CALIBRATION

The EXA PH202 can be calibrated in three distinct ways.

6-1. Automatic calibration

This method uses internally programmed buffer tables, (from Service Codes 24, 25 and 26), to calculate the buffer value at the actual temperature during the calibration. In addition, the stability of the reading is automatically calculated, and when the reading has stabilized fully automatic adjustments of slope and asymmetry are made. This eliminates the question of how long the operator should allow prior to adjust­ment. A menu driven prompt system conducts the operator through the simple, foolproof routine.
Default settings for the buffer solutions are the standard NIST (formerly NBS) recognised solutions “4”, “7” and “9”. These are known as primary buffers. They have a much better buffer capacity than the “commercial” or adjusted buffers. Yokogawa strongly recommends the use of these buffers to provide the best pH calibration.

6-2. Manual calibration

In this method, the operator decides on the actual value to enter. Manual calibration is most often used for single-point adjustment of the asymmetry potential, by comparison method.
Manual calibration can also be used to perform a full 2-point calibration with solutions other than the NIST buffers that are listed in the calibration tables. In this case, the solutions are applied sequentially as in the AUT CAL method, but the user determines the adjustment of reading and stability.
NOTE: During manual calibration the temperature coefficient is still active. This means that the readings
are referred to 25 °C. This makes grab sample calibration easy and accurate. However, if the manual calibration technique is used for buffer calibration, the temperature coefficient must be set to zero in maintenance mode in the “TEMP” routine (see chapter 5).

6-3. Sample calibration

The operator activates the “SAMPLE” calibration routine, at the same time as taking a representative process sample. After determining the pH of this sample by independent methods, (in the lab for exam­ple) the reading can be adjusted. While the sample is being analyzed, EXA holds the sample data in memory, while continuing to control and read pH normally.

6-4. Data entry

In special circumstances, users can directly enter the calibration data in the service code menu (see chapter 5). This is appropriate where the manufacturer provides calibration data for each probe (as with the Pfaudler sensors) or where electrodes are laboratory calibrated for subsequent installation on the plant. Service Code 23 allows the values of ITP, asymmetry potential (or zero point) and slope to be entered.
NOTE:
· Be sure to use fresh, pure standard solution to ensure that the calibration is accurate.
· If the temperature of the standard solution changes then its pH will also change. Ensure that the temperature of the standard solution is stable at calibration time.
· In using a pH sensor which isn't incorporated with a temperature element for automatic temperature
compensation, the temperature of measured solution should be set on the PH202 transmitter.
· When an antimony sensor is applied, measured temperature value also should be set.
IM 12B07D02-01E
6-2 Calibration

6-5. Calibration procedures

6-5-1. Automatic calibration

Automatic Calibration Press the MODE key. AUT.CAL appears in the display, and the
MODE
pH
MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD
NO MODEYES
ENT
pH
YES
NO
YES
YES/NO key prompt flags flash. Press YES.
answer YES if new sensor fitted or NO if not.
pH
NEW.SNS: Display flashes YES/NO
Care! YES resets logbook calibration data.
Insert the sensors in pH 7 buffer solution.
Press YES to start calibration.
YES
NO
pH
YOKOGAWA
YES
NO
Note: To start calibration with another solution, press NO to cycle through the other options. "CAL 7" NO "CAL 4" NO "CAL 9" NO "CAL 7"
The instruments waits for the reading to stabilize. (The pH display flashes) When reading Is stable,
pH
YES
NO
the CAL END message appears.
Press YES for single point (As Pot) adjustment. Press NO to proceed to calibrate Slope.
NO
YES
NO
pH
YES NO
The display now flashes the pH value. The instrument waits for the reading to stabilize.
When the reading is stable, the CAL END message appears. Press YES.
YES
Transfer to second buffer (pH4) and press YES.
YES NO
After briefly displaying WAIT, the display returns to the normal readout.
pH
After briefly displaying WAIT, the display
YES NO
returns to the normal readout.
pH
pH
IM 12B07D02-01E
6-5-2. Automatic calibration with HOLD active
mA
Calibration 6-3
12B6C3-31
Automatic Calibration With Hold Active
Press the MODE key. AUT.CAL appears in the display, and the
YES/NO key prompt flags flash. Press YES.
MODE
pH
MEASURE AUT.CAL
MAN.CAL
DISPLAY TEMP
HOLD
NO MODEYES
ENT
YOKOGAWA
pH
YES
NO
YES
answer YES if new sensor fitted or NO if not.
pH
NEW.SNS: Display flashes YES/NO
Care! YES resets logbook calibration data.
Insert the sensors in pH 7 buffer solution.
YES
NO
NO
Note: To start calibration with another solution, press NO to cycle through the other options. "CAL 7" NO "CAL 4" NO "CAL 9" NO "CAL 7"
The instruments waits for the reading to stabilise. (The pH display flashes) When reading Is stable, the CAL END message appears.
pH
HOLD
YES
NO
Press YES for single point (As Pot) adjustment. Press NO to proceed to calibrate Slope.
HOLD
YES
NO
HOLD
pH
YES
Transfer to pH 4 buffer and press YES.
NO
HOLD
YES
NO
pH
pH
YES NO
HOLD
pH
YES
HOLD
pH
NO
The instrument then waits for the reading to stabilise. (The pH display flashes).
When the reading is stable, the CAL END message appears. Press YES. WAIT flashes briefly then HOLD
The calibration is now complete. Put the sensors back in the process and press NO to turn off HOLD and return to the measuring mode.
Press YES to start calibration.
HOLD
pH
YES
HOLD
The single­point calibration is now complete. put sensors back in the process and press NO to switch off HOLD and return to measuring mode.
YES NO
pH
IM 12B07D02-01E
6-4 Calibration

6-5-3. Manual calibration (2nd parameter calibration)

12B6C3-32
Manual Calibration. (2nd parameter calibration) Press the MODE key. The legend AUT.CAL appears,
and the YES/NO key prompt flags flash. Press NO.
The display MAN.CAL appears.
MODE
pH
MEASURE
AUT.CAL MAN.CAL DISPLAY
TEMP HOLD
NO MODEYES
ENT
pH
YES
pH
NO
NO
Press YES or NO at NEW.SNS prompt.
YOKOGAWA
YES
pH
YES
NO
pH
Press YES to start calibration.
YES
YES
pH
NO
YES
pH
YES
NO
YES
NO
NO
(Note: Press NO to start
Put sensors in buffer solution. Press YES.
ENT
calibration of zero point when
enabled in Service Mode).
Set the value using the >,,ENT key.
>
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.
pH
YES
NO
YES
pH
NO
For 2 point (As Pot and Slope)
Adjustment select second buffer
solution and adjust as for pH7 buffer.
pH
ENT
pH
ENT
WAIT is displayed briefly then EXA returns to measuring mode.
IM 12B07D02-01E
Calibration 6-5
Manual Calibration of zero point according to IEC 60746-2. When enabled in service code 27.
NO
pH
YES
YES
pH
YES
YES
Manual Calibration of mV offset for ORP (2nd parameter). Where both pH and ORP (or rH) are measured, the offset (Asymmetry potential) of the second parameter is calibrated as shown below.
When enabled in service code 02.
pH
NO
YES
NO
NO
YES
YES
NO
NO
YES
pH
YES
Return to
measuring mode.
ENT
Adjust value
>
with >, , ENT Keys
YES
NO
Adjust value with >, , ENT Keys
YES
YES
Return to
measuring mode.
ENT
>
NO
IM 12B07D02-01E
6-6 Calibration

6-5-4. Sample calibration

Sample Calibration.
pH
NO MODEYES
ENT
YOKOGAWA
pH
MODE
MEASURE
AUT.CAL
MAN.CAL
DISPLAY
TEMP
HOLD
Press the MODE key. The legend AUT.CAL appears, and the YES/NO
key prompt flags flash. Press NO.
The display MAN.CAL appears.
Press NO.SAMPLE appears Press to start calibration.
YES
pH
NO
pH
NO
YES
NO
pH
NO
YES
NO
YES
YES
Press YES at the same time as taking sample for analysis.
YES
YES
NO
pH
PH 202 now continues to measure/control, as before. SAMPLE flashes to indicate that data is stored waiting for input of analyzed value.
IM 12B07D02-01E
Calibration 6-7
pH
When the laboratory analysis is completed the data is entered by first pressing MODE, then following the sequence below
MODE
pH
YES
NO
MAN.CAL
YES
NO
pH
YES
NO
NO
YES
pH
YES
NO
NO
Return to maintenance
pH
YES
NO
pH
YES
MAN.CAL
NO
YES
or
MAN.CAL
NO
menu
For first calibration of a new sensor
pH
YES
NO
YES
Quit
NO
pH
YES
NO
NO
YES
or
NO
To calibrate ORP or rH
YES
Note: Display shows
pH
YES
MAN.CAL
NO
YES
Note: Display shows
pH
the value as at the time
the value as at the time
of taking the sample.
pH
NOYES
NO
YES
or
Return to maintenance menu
of taking the sample.
MAN.CAL
ENT
Set the value using the >,,ENT key.
ENT
pH
YES
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.
YES
NO
>
>
pH
pH
IM 12B07D02-01E
Maintenance 7-1

7. MAINTENANCE

7-1. Periodic maintenance for the EXA transmitter

The 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 Customer Maintenance Parts Lists 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 vapor. The pH measurement uses high impedance sensors and may otherwise be prone to problems caused by exposure of the circuitry to condensation.
The EXA analyzer contains a logbook feature which needs a clock to provide the timings. The EXA instrument contains a lithium cell (battery) 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 for the sensor system

NOTE:
Maintenance advice listed here is intentionally general in nature. Sensor maintenance is highly
application specific.
The sensor system must be kept clean to function well. This may require regular cleaning of the elec­trodes. (The effect of dirty electrodes will be to slow the system response and perhaps corrupt the measuring loop entirely). The frequency of cleaning and the method of cleaning will depend entirely on the process.
Where a refillable (flowing electrolyte) reference system is employed, make sure that the reservoir is kept topped up. The rate of electrolyte consumption will again be process dependent, so experience will show how often you must refill.
The periodic recalibration of the sensor system is necessary to ensure best accuracy. This takes into account the aging of the sensors, and the nonrecoverable changes that take place. These processes are slow, however. If frequent recalibration is needed, it is usually because the cleaning process is not effec­tive, the calibration is not well executed or the pH readings are temperature dependent. Monthly calibra­tions should be sufficient for most applications.
If a film remains on the pH sensor after cleaning, or if the reference junction is partly plugged, then measuring errors can be interpreted as a need for recalibration. Because these changes are reversible with correct cleaning and/or proper selection or adjustment of the electrolyte flow through the junction, make sure that these items are correct before recalibrating the system.
IM 12B07D02-01E
7-2 maintenance
7-3. Calibration procedures are described in step-by-step detail in chapter 6. However, follow these
guidelines.
1. Before starting a calibration, make sure the electrode system is properly cleaned so that electrodes are fully functional. They must then be rinsed with clean water to avoid contamination of the calibration solution.
2. Always use fresh buffer solutions to avoid the possibility of introducing errors from contaminated or aged solutions. Buffers supplied as liquids have a limited shelf life, especially alkaline buffers which absorb CO
2 from the air.
3. Yokogawa strongly recommends NIST (primary) buffer standards in order to ensure the best accuracy and best buffer capacity is available. Commercially adjusted buffers (e.g. 7.00, 9.00 or 10.00 pH) are a compromise as a standard, and are often supplied without the temperature dependency curve. Their stability will be much worse than for NIST solutions.
NOTE: NIST (formerly NBS) buffers are available as consumable items from any Yokogawa sales office
under the following part numbers: 6C232 4.01 pH at 25°C} 6C237 6.87 pH at 25°C} A box contains 5 packets of powder. Each makes a 200 ml solution. 6C236 9.18 pH at 25°C}
IM 12B07D02-01E
Troubleshooting 8-1

8. TROUBLESHOOTING

The EXA 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 also checks the electrodes to establish whether they are still functioning within specified limits. The transmitter checks the glass-electrode impedance for a low value to determine if it is broken or cracked, and for a high impedance to check for internal breakage or disconnection.
The reference system is prone to more faults than the glass electrode in general. The unit measures the impedance value and compares it to the programmed value in memory to determine acceptance during testing. A high impedance signals pollution or poisoning of the reference electrode diaphragm.
Also, the EXA checks the electrodes during calibration to determine if the reaction time is suitable for pH measurement. A specially timed check can be activated following each cleaning cycle. After calibration, the unit checks the calculated asymmetry potential and the slope to determine if they are still within limits specified by the software.
The slow shift of asymmetry potential could signal a poisoning of the reference electrode system by the process. The decrease of slope equals a decrease of sensitivity of the glass electrode or can show a coating buildup at the electrode.
The EXA makes a distinction among diagnostic findings. All errors are signaled by the FAIL flag in the display. Only faults in the measuring circuit can be set as HARD FAIL, with “Burn-up or Burn-down” sig­nals on the mA output.
What follows is a brief outline of some of the EXA troubleshooting procedures, followed by a detailed table of error codes with possible causes and remedies.
NOTE: The diagnostic function of the EXA gives a variable time interval between impedance checks, up
to 5 minutes. When trouble shooting, a manual impedance check can be initiated by following the procedure in section 5-1-4.
IM 12B07D02-01E
8-2 Troubleshooting

8-1. Diagnostics

8-1-1. Off-line calibration checks

The EXA transmitter incorporates a diagnostic check of the asymmetry potential after a calibration has been completed. This is a valid check for both manual and automatic calibration routines.
The actual value can be called up from the DISPLAY routine in the maintenance menu. A large value often indicates poisoning or pollution of the reference system used. If the asymmetry potential exceeds programmable limits, the EXA generates an error (E2).
The EXA also performs diagnostics to check for the slope of the pH electrode after automatic calibration is completed. The actual value of the slope can be called up on the DISPLAY routine in the maintenance menu (SL). This value is an indication of the age of the electrode. If the value stays within the limits of 70 to 110 percent of the theoretical value (59.16 mV/pH at 25°C), it is accepted. Otherwise, the unit gener­ates an error (E3).
Activation or deactivation of the asymmetry diagnostic check and slope check is made from the Service Codes. See Chapter 5 or Chapter 10 (Appendix).

8-1-2. On-line impedance checks

The EXA has a sophisticated impedance checking system. The sensors can be checked for their imped­ance over a very wide range, which makes the tool equally useful for glass, enamel, reference and metal (ORP) sensors. The measurement is temperature compensated for the characteristic of the pH glass sensor.
In order to measure accurately over such a wide range, it is necessary to split the range into two. This is done by a pair of jumper settings, high range and low range can be set on either input, making the sys­tem extremely flexible.
The following error message table gives a list of problems that are indicated when the high or low imped­ance limits are exceeded for a sensor. Such things as fouling, breakage and cable faults are readily detected. The non-immersion of the sensors in the process fluid is also signalled.
IM 12B07D02-01E
Troubleshooting 8-3
Table 8-1. Error Codes
Code Error description Possible cause Suggested remedy
E0 Buffer solution temperature Buffer solution too hot or too cold Adjust buffer temperature
outside the programmed range Check cabling
E1 Measurement failed to stabilize. Sensors fouled Clean sensors
during the calibration Sensors too slow (aged sensor) Replace sensors
E2 Asymmetry potential too high. Sensors are aged or polluted Check buffer solution
(Limits set in service code 21.) Mistake in calibration Recalibrate at pH7
Replace sensor
E3 Slope (sensitivity) is outside limits. Measuring sensor aged Replace measuring sensor
(Limits set in service code 22.) Poor insulation at the connector Replace or dry cables
E4.1 Impedance of input 1 too low. Measuring sensor broken Replace measuring sensor
(Limits set in service code 03.) Damaged or damp connections Replace or dry cable
E4.2 Impedance of input 2 too low. Reference sensor broken Replace reference sensor
(Limits set in service code 04.) Damaged connections Replace cables
E5.1 Impedance of input 1 too high. Measuring sensor disconnected Check connections
(Limits set in service code 03.) Sensors not immersed in process Check process
Liquid earth disconnected Check connections
E5.2 Impedance of input 2 too high. Reference sensor fouled Clean or replace sensor
(Limits set in service code 04.) Liquid earth disconnected Check sensor immersion
Insufficient electrolyte Check electrolyte reservoir
E7 Temperature sensor open Process too hot or too cold Check process
> 140°C (or <-10°C for 8k55) Wrong temperature sensor setting Check sensor & setting
Temperature sensor damaged Check connections
E8 Temperature sensor shortened Process too cold or too hot Check process
< -30 °C (or > 120 °C for 8k55) Wrong temperature sensor used Check sensor & setting
Temperature sensor damaged Check connections
E9 Measurement out of range (-2 to 16 pH) Sensors disconnected Check cabling
Sensor wrongly connected Check cabling
Sensor(s) defective Replace sensor(s)
E10 EEPROM write failure Fault in electronics Try again, if unsuccessful
contact Yokogawa
E11 Wash recovery check error Measuring sensor aged Replace measuring sensor
mA
(if communication is set to pH201*B in code Sensor still coated after washing Check cleaning system
60) Defective wash system If needed adjust timings
E12 ORP / rH outside of preset limits Sensors disconnected or wrongly Check cabling
connected
E14 No valid calibration data. Data lost after switching from Recalibrate
pH to ORP
E15 Cable resistance to temperature Cable resistance too high Use Pt1000
sensor exceeds limit value. Corroded contacts Clean and reterminate
Wrong sensor programmed Reprogram
E16 Call for maintenance interval time exceeded. System not maintained in Perform maintenance
preset time period Reset interval
E17 Output span too small < 1pH Incorrect configuration by user Reprogram
mA
E18 Table values make no sense
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
E23 Zero point outside limits Sensors are aged or polluted Check buffer solution
Mistake in calibration Recalibrate at pH7
Replace sensor
IM 12B07D02-01E

9. SPARE PARTS

See Customer Maintenance Parts List
Spare parts 9-1
IM 12B07D02-01E

10. APPENDIX

10-1. User setting table

FUNCTION SETTING DEFAULTS USER SETTINGS Parameter specific functions
01 *PH.ORP 0 pH 02 *PRM2 0 Off 03 *Z1.CHK 1.1.1 High range, TC on check on, 04 *Z2.CHK 0.0.1 Low range, TC off check off no TC 05 *CAL.CK 1.1 AP on, Slope on
Temperature functions
10 *T.SENS 0 Pt1000 11 *T.UNIT 0 °C 12 *T.ADJ None 13 *T.COMP 0 Off *T.COEF -0.00 pH/10°C
Calibration functions
20 *t.SEC 5 Sec *PH 0.02 pH 21 *AS.LOW -120 mV *AS.HI 120 mV 22 *SL.LOW 70 % *SL.HI 110 % 23 *ITP 7.00 pH *SLOPE 100.0 % *ASP.1D 0.0 mV *ASP.mV mV 24 *BUF.ID 4 NIST 4 25 *BUF.ID 7 NIST 7 26 *BUF.ID 9 NIST 9 27 *ZERO.P 0 disabled
mA outputs
31 *OUTP.F 0 pH (ORP)
mAmA
32 *BURN 0 off
mAmA
35 *TABLE 21 pt table see code 31
mAmA
Appendix 10-1
IM 12B07D02-01E
10-2 Appendix
FUNCTION SETTING DEFAULTS USER SETTINGS
User interface
50 *RET. 1 on
51 *MODE 0 off
52 *PASS 0.0.0 all off
53 *Err.4.1 1 hard fail
*Err.5.1 1 hard fail
*Err.4.2 1 hard fail
*Err.5.2 1 hard fail
*Err.07 1 hard fail
*Err.08 1 hard fail
*Err.09 1 hard fail
*Err.11 0 soft fail
*Err.16 0 soft fail
55 *CALL.M 0 250 days
56 *DISP 1 0.01 pH
Communication
60 *COMM. 1.0 on/write ena.
mA
*ADDR. 00 00
mA
61 *HOUR
62 *ERASE
General
70 *LOAD
79 *CUST.D
Test and setup mode
80 *TEST
IM 12B07D02-01E

10-2. Configuration checklist for PH202G

Standard Configuration Options Reference for
change
Measured Variable(s)
primary inputs pH, ORP and Temp pH range 0-14 pH any span within -2-16 pH “output” pH range linearized disabled 21 point table codes 31& 35 ORP range -500 to 500 mV spans up to 3000 mV between “output”
-1500 to 1500mV Temperature range -30-140°C Temperature unit Celsius Fahrenheit code 11
mA Outputs
mA
analog output 4- 20 mA for pH pH/ORP/(parameter 2) code 01, 02, 31
mA
output linearization disabled pH/ORP codes 35
mA
Communication
mA
digital interface disabled HART 60 communication software external HHC or PC202 contact factory variables on display pH/ORP and temp pH/ORP, parameter 2, mA output “display” SL, AP, Z1, Z2 etc. burn out disabled burn low (3.6 or 3.9)/ high (21) on mA output code 32 password protection disabled for maint/ comm./ serv level code 52 autoreturn return to measure in 10 min. enable or disable code 50 add. functions in MAINT disabled Impedance check start code 51 Diagnostics impedance checking active enable or disable code 03 & 04 check on calibration data active enable or disable code 05 check on stability 0.02 pH per 5 s choose stability level code 20 display calibration log. enabled with logbook diagnostics setup codes 03, 04 & 05 Compatibility pH or ORP glass sensor/metal electrode pH or ORP code 01 temperature sensor Pt 1000 Pt1000; Pt100, etc code 10 other sensors enamel sensors (Pfaudler) ITP & impedance check setup codes 23, 03 & 04 2nd parameter disabled pH & ORP/ pH &rH code 02 manual temp. comp. disabled disable or enable “temp” Special Features buffer table configuration NIST standard fully configurable codes 24, 25 & 26 temperature calibration none adjustment +/- 20 °C code 12 zero point calibration disabled disable or enable code 27 call for maintenance set time interval 1 - 250 days code 55 HOLD during maintenance hold last or hold fix “hold” process temp. compensation disabled set temperature coefficient code 13 logbook disabled 2 x 50 events code 61, 62
Appendix 10-3
IM 12B07D02-01E
10-4 Appendix

10-3. Setup for sensor compatibility

10-3-1. General

The inputs of the EXA transmitter are freely programmable for ease of installation. Standard glass pH electrodes, Ag/AgCl reference electrodes and Pt100 and Pt1000 temperature sensors 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.

10-3-2. Selection of measurement and reference electrode

The EXA PH202 is preprogrammed to accept industry standard glass electrodes and reference elec­trodes. The unit initiates checks for asymmetry and slope during calibration. The on-line impedance checking function has been upgraded in this most recent EXA release.
The EXA is universally compatible with all types of electrodes, such as enamel and antimony. In such systems, however, the specific isothermal point of intersection (ITP), slope (pH/mV) and asymmetry potential can be set for the type of electrode.

10-3-3. Selecting a temperature sensor

The EXA PH202 reaches its highest accuracy when used with the Pt1000 temperature sensor. This ele­ment offers a 10-fold increase in resistance dependence over the Pt100 sensor. Choice of temperature sensor is made in the Service Codes found in Chapter 5 of this manual.
• ITP
Most Yokogawa sensor systems use an Iso-thermal point (ITP) of pH7 and a zero point at pH7. This is the default condition for which the transmitter is set. It is only necessary to consider this adjustment when installing a system with a different ITP. Antimony systems and Pfaudler probes are good examples of systems with different ITP values. Service code 23 is used. This also permits the setting of calibration data for precalibrated sensors.
• Temperature sensor
The Pt 1000 RTD sensor is now becoming the most commonly used for temperature compensation. The transmitter accepts inputs from several different temperature sensors to suit most sensor systems. Service code 10-19 are used to set the temperature parameters and the process temperature coefficient.
• Temperature calibration
For best accuracy, the temperature sensor should be calibrated to compensate for connection cable errors. See Service code 12.
• pH Calibration
Traditionally, users select buffer solutions to suit the chosen output range. This is merely a continuation of the days of analog instruments that used indicators driven by the mA output. With digital technology, it is better to choose good buffer solutions and make an effective calibration than to use commercial (adjusted) buffers which may have round number values, but are less effective buffers with lower buffer capacity. It is for this reason that Yokogawa recommends that the NIST 4, 7 and 9 standard buffers be used to calibrate solutions. The temperature responses of these are pre-programmed into Service codes 24, 25, and 26 in the EXA PH202. Where other buffers are used with the semi-automatic calibration function, their temperature response should be programmed into the relevant code.
IM 12B07D02-01E

10-4. Set up for other functions

mA
• Current outputs
Transmission signals for the measured parameters and FAIL signals can be set up in service codes
31, 32 and 35.
• Diagnostic Checks
Impedance checks, response time and stability checks are all included in the PH202. In order to get the
best performance from each of these features, the transmitter should be fine tuned according to experi-
ence in the installation, and for the particular sensors selected. Service codes 3, 4, 5 & 20 all contribute to
the diagnostics. Please note that the default settings provide an excellent starting point and provide most
valuable information about the performance of the electrode system.
mA
• Communications
The proprietary HART (FSK) 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 60-62 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 easily evaluate diagnostic information to determine predictive maintenance schedules.
For example, by monitoring the deterioration in the slope of the pH sensor, it can be changed before
a failure (or process shutdown) occurs.
Appendix 10-5
IM 12B07D02-01E
10-6 Appendix

10-5. Set up for Pfaudler Type 18 sensor

The PH202 is intended to measure with all sorts of pH sensors, including the Pfaudler Type 18 sensor. The Pfaudler design of dual membrane system uses two enamels of differing sensitivity. The first a pH sensitive membrane, and the second one that responds to Na+ and K+ and acts as a reference.
The analyzer has dual high impedance inputs which measure perfectly even with very high impedance sensors. However, the impedance measuring system (diagnostics) needs to be set up for best perform­ance.

10-5-1. General set up

1. Set impedance measuring hardware. This is done by the use of links on the terminals adjacent to
the input terminals. For the Pfaudler system, this means that the terminals should have the links disconnected in order to set for HIGH/HIGH impedance measuring.
2. Set the impedance check in software. Use codes 03 & 04 to enable the measurement and set for
high impedance and configure appropriate limits.
Code 03 set to 1.0.1 Iow limit 1 Megaohm high limit 1 Gigaohm Code 04 set to 1.0.1 Iow limit 1 Megaohm high limit 1 Gigaohm
3. Set the temperature compensation sensor as 100 Ohm Platinum RTD with service code 10.
Code 10 set to 1 100 Ohms Pt.
The system will now respond properly to the Pfaudler type 18 sensor, and the other functions of the
EXA analyzer will need to be set in the normal way to suit the use to which the loop is being put. Output ranges, control functions and alarms should all be set as described elsewhere in this manual.

10-5-2. Calibration set up

4. The alternative Zero point (calibration and display) according to IEC 60746-2 may be enabled in
service code 27, and set in the MAN.CAL routine. A value of 10.5 pH is a good starting point for the Pfaudler 18 sensor.
5. Where lab test data are available for the sensor, service code 23 can be used to set values for ITP &
Slope (and As pot for parameter 2 when enabled).
(This method can be useful for the type 18 sensor, as it is not usual to perform regular calibrations on this system as with normal sensors. This is because the system may well respond differently, to ordinary buffers, than with the process solutions. The procedure is to determine the temperature response (ITP) and the sensitivity (Slope) of the sensor, and enter these values in code 23.)
Because this is a rather complex procedure, it is recommended instead to use the default settings of ITP = 7.00, and Slope = 100 %, and make a single point (MAN.CAL) calibration in the process at the work­ing temperature, and at the normal operating (control setpoint) pH. This ensures that the desired control point will be measured accurately, even if there may be small deviations when there is a big deviation from the setpoint. This of course has no effect on the accuracy of a control loop. The special construc­tion of the Pfaudler sensor ensures that there is practically no drift in the calibration. All that is necessary is to keep the sensor membranes clean. This is best done by cleaning with low pressure steam, which restores the original condition of the sensor, including the original calibration values.
IM 12B07D02-01E
Appendix 10-7
10-6. 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 Level 2 menu Level 3 menu Level 4 menu Level 5 menu
Process variab.
Process value Second process value Temperature % of output range
More
Slope Aspot Aspot2 Imp1 Imp2
ON LINE MENU
Device setup
Primary value Analog output Lower rangeval. Upper rangeval.
Diag/Service
Basic setup
Detailed Setup
Status
Hold
Te mp . Ma n
Logbook1 Logbook2
Ta g Unit
Device info
Param. Specific
Temp. Spec
Calibration Spec.
Hold on/off Hold type Hold value
Manual temp value Manual temp on/off
Date Descriptor Message Write protect
second parameter
Impedance input1
Impedance input2
Calibration check Imp. limits Temp sensor Temp unit Temp comp. Temp coeff.
Stability
Aspot
Slope
ITP
Temp. comp. Imp. check Imp. limits
Temp. comp Imp. check
Stable time Stable pH
Zeropoint Aspot low limit Aspot high limit
Slope value
Slope low limit Slope high limit
Review
Output function
Exa user interf.
Manufacturer Distributor Model Meas. type etc. etc.
Buffer
mA function Burn function
Table
Error programming Maintenance timer
Display
Buffer 4
Buffer 7
Buffer 9
table 0%.....
table 100%
Error 4.1.... Error 16
Timer on/off Reload value
Display resolution Auto return Man. impedance
Passcode
Buffer 4 name
C....80°C
Buffer40° Buffer 7 name
Buffer70° C....80° C
Buffer9 name
Buffer90° C....80° C
Maintenance Commissioning Service
IM 12B07D02-01E
10-8 Appendix
Menu structure for HHT 375 shown below.
ON LINE MENU
Device setup PV
AO1 LRV URV
Note: “PV” means Primary value “AO1” means Analog output “LRV” means Lower rangeval “URV” means Upper rangeval
Level 1 menu
1.Process variables
2.Diag/Service
3.Basic
setup
Level 2 menu Level 3 menu Level 4 menu
1. PV
2. Temp
3. PV % rnge
4. More pr.var
Note: “PV % rnge” means % of output range
1. Status
2. Hold
3.Temp.man
4. Logbook
5. Calibrate
6. Loop test
1.Tag
2.Device information
1. Slope
2. Aspot
3. Input 1 imp.
4. Input 2 imp.
1. Hold status
2. Hold fnc
3. Hold type
4. Hold fix
1. T.meas
2. Man. temp
1. Logbook conf.
2. Logbook 1
3. Logbook 2
1. Sample
2. Manual Cal. PV
1. Date
2. Descriptor
3. Message
4. Write protect
5. Manufacturer
6. Dev id
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 Man.Temp Aspot Aspot 2 Slope Temp. coef Z1.(cal) Z2.(cal) Stab.time. I.T.P. Zero.pnt New sensor One.p cal Two.p cal
(Note):HART protocol DD files can be downloaded by following URL.
http://www.yokogawa.com/an/download/an-dl-fieldbus-001en.htm
Continued next page
IM 12B07D02-01E
(Continued)
Appendix 10-9
Level 1 menu Level 2 menu Level 3 menu Level 4 menu Level 5 menu
4.Detailed setup
5.Review
1. Param. specific
2. Temp. specific
3. Cal. specific
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. SV Meas.
2. SV Param.
3. Z1 setup
4. Z2 setup
5. Cal. Check
6. PV unit
1. Temp. sens
2. Temp. unit
3. Temp. comp
1. Stab. chk
2. Aspot
3. Slope
4. ITP
5. Buffers 1. Buffer 1
1. mA funct.
2. Burn funct.
3. mA-table
1. Error prog.
2. Maintenance
3. Display
1. Z1 Comp
2. Z1 Meas.
3. Z1 Err.lim
1. Z2 Comp
2. Z2 Meas.
3. Z2 Err.lim
1. Aspot chk
2. Slope chk
Note: “Z1” means impedance input1. “Z2” means impedance input2.
1. Stab. time
2. Stab. val
1. Aspot
2. Zeropnt.
3. Aspot L
4. Aspot H
1. Slope
2. Slope L
3. Slope H
2. Buffer 2
3. Buffer 3
Err4.1···Err16
1. Maint. timer
1. Disp. res
2. Auto. Ret
3. Passcodes
1. Z1 low
2. Z1 high
1. Z2 low
2. Z2 high
Note: “Stab.” means stability.
1. Buf1 id
2. Buffer1 values
1. Buf2 id
2. Buffer2 values
1. Buf3 id
2. Buffer3 values
1. Maintenance
2. Commissioning
3. Service
Level 6 menu
1. Change
2. Exit
1. Change
2. Exit
1. Change
2. Exit
1. Change
2. Exit
Buffer 4 name 0°C····80°C
Buffer 7 name 0°C····80°C
Buffer 9 name 0°C····80°C
IM 12B07D02-01E
10-10 Appendix
IM 12B07D02-01E
Glossary
pH (-log [H+] ) This is a logarithmic function of the Hydrogen ion activity (concentration). This
provides a quick indication of the acidic or alkaline behavior of a dilute solution. Normally measured on a scale of 0-14 pH where low numerical values are acidic (0 is approximately 1 Normal acid) and high numbers are alkaline (14 is approxi­mately 1 Normal NaOH). The neutral point is pH 7.
Defined by Nernst in the following equation: E = Eo + RT/nF x Ln [H+]
E = measured potential R = gas constant T = absolute temperature n = valence F = Faraday number Ln = Napierian logarithm [H+] = activity of the Hydrogen ion Eo = Reference potential
ORP Oxidation reduction potential is a measure of oxidizing power of a solution. The
greater the milli Volt value with a negative polarity, the greater the oxidizing power. Reducing power is indicated by positive values of mV.
Glossary
rH This is a composite value that indicates the oxidizing power of a solution com-
pensating for the influence of the acid or alkaline components. The scale is 0­55 rH, where oxidizing solutions provide the highest readings.
Asymmetry potential This is the difference between the isothermal point of intersection and the zero
point.
Slope This is the sensitivity of the pH electrode (mV/pH) usually expressed as a % of
the theoretical value (Nernst).
ITP This is the isothermal point of intersection. This is the value in pH at which the
temperature response of the system is at a null point. In other words, the point of intersection of the temperature lines on a graph of milli volts vs pH. This point is critical to the correct operation of the temperature compensation circuitry.
Zero point This is the value of pH at which the electrode combination yields 0 mV as an
output.
500
mV
pH
mV
- 200
ITP
0
0 mV
0
As pot
0 °C
10 °C
25 °C
7
ITP
Zero Point
14
pH
IM 12B07D02-01E
Appendix 11-1

11. APPENDIX 2

11-1. Preface

Feasible combinations of the PH202G pH/ORP 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 PH202G is not intrinsically safe (explosionproof), so never install it in a
hazardous area.
Conductivity transmitter
PH202G
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 PH202, refer to the following Instruction Manuals.
Manual Name Instruments mentioned IM No.
pH sensor & holders for general purpose
ORP sensor for general purpose
pH sensor & holder for pure water pH electrode & holder for fermentation use Terminal box
Ultrasonic oscillator
PH201G distributor (Style B)
SDBT, SDBS distributor Attachment rack instrument
HA405 pH sensor
HA406 pH sensor
DPAS405 pH sensor DPA405 pH sensor DPA406 pH sensor
FU20 pH sensor HF405 pH sensor BARD Safety Barrier 2-wire pH/ORP Transmitter
IM 12B7K1-02E IM 12B7J1-01E IM 12B7M2-01E IM 12B07M01-01E IM 12B07N01-01E IM 12B07W03-01E
IM 12C07J01-01E IM 12C04K01-01E IM 12C04W02-01E IM 12B7J2-01E IM 12B07P01-01E IM 12B7Q1-11E
IM 19D01B01-01E IM 19C1B3-01E IM 12B5U2-E
IM 19B01E04-02E IM 1B4T1-01E IM 1B4F2-01E IM 12B07E01-01E
IM 12B07E02-01E
IM 12B7G1-01E IM 12B07H01-01E IM 12B07H02-01E
IM 12B07K02-01E IM 12B07L01-01E IM 01B04S10-01E IM 12B07D02-01E
PH8ERP KCl Refillable pH sensor PH8EFP KCl Filling type pH sensor PH8HG Guide-pipe PH8HS, PH8HSF Submersion type holder PH8HF, PH8HFF Flow-through type holder PH8AX Accessories
OR8EFG KCl filling type ORP sensor OR8ERG KCl Refillable ORP sensor OR8AX Accessories PH8EHP pH sensor for pure water PH8HH holder for pH sensor for pure water Y/465 pH sensor for fermentation use
WTB10-PH1, WTB10-PH2 Terminal Box PUS400G Ultrasonic Oscillator
PH8USF (Explosionproof type) PH201G (style B) Distributor
SDBT, SDBS Distributor Instruments for rack attachment
HA405 Solid electrolyte (Xerolyt )
HA406 Solid electrolyte (Xerolyt ) with temperature element DPAS405 pH sensor for small culture tanks DPA 405 pH sensor for chemical process DPA 406 pH sensor for chemical process
with temperature element FU20 pH/ORP electrode HF405 Hydrofluoric Acid-resistant pH sensor Model BARD-800 Safety Barrier PH202G/PH202S 2-wire pH/ORP Transmitter
R
R
T2.eps
IM 12B07D02-01E
11-2 Appendix

11-2. Wiring diagrams 11-2-1. Example of Non-Explosionproof System

PH8EFP PH8ERP PH8EHP
WTB10
Terminal Box
15
16
13
12
11
14
PH202G
pH/ORP Transmitter
15
+
16
-
13
G
12
11
14
(100Ω or less)
PH201G
Distributor
A(+)
B(-)
(CMN)D
c
a
d
b
"2
Hold
FAIL
C
f
WASH
Output Signal
(1 to 5V DC)
e
SDBT
Distributor
1(+)
(+)A
2(-)
(-)B
F2.3E.eps
Output Signal
(1 to 5V DC)

11-2-2. Example of Intrinsically Safe Explosionproof System

pH/ORP Sensor
PH8EFP PH8ERP PH8EHP
*1: Use a 2-conductor shielded cable with an outside diameter of 6 to 12 mm. Shield must be connected to internal terminal G of transmitter and left unconnected at the other side.
*2: Transmitter must be grounded using external terminal: for general purpose version ground resistance of PH202G should not exceed 100V (Japanese Class D grounding) .
PH202S
pH/ORP Transmitter
15
+
16
-
G
13
12
11
14
Ground to earth
Safety Barrier
*1
Distributor
Output
F2.4E.eps
WARNINGWARNING
Use an appropriate DC power supply (such as from the PH201G distributor) for the PH202 transmitter. Under no circumstances should you connect AC power such as 100V AC or similar AC power supply line. To measure pH or ORP in hazardous locations, use the PH202S or PH202SJ with intrinsic safety barriers.
Grounding: Be sure to ground the transmitter by using the ground terminal on its case. Connect the G terminal inside the transmitter, to the shield wire of two-core shield cable which is
conneced between the distributor and transmitter.
For the PH202G transmitter (this does not apply to the PH202S) if you cannot ground the G
terminal on the transmitter case then connect this G terminal to the shield of the two-wire cable connecting the transmitter and distributor, and ground it at the distributor end.

11-3. Sensor wiring

Refer to Figure 11-1 and 11-2, which includes drawings that outline sensor wiring. The PH202 can be used with a wide range of commercially available sensor types, both from Yokogawa and other manufacturers. The sensor systems from Yokogawa fall into two categories; the ones that use a fixed cable and the ones with separate cables. To connect sensors with fixed cables, simply match the terminal numbers in the instrument with the identification numbers in the instrument on the cable ends. The recommended procedure is to color-code each end of the cables to match the sensors with the color strips provided with each cable. This provides a quick way to identify the ends of the cables belonging to a particular sensor when they are installed. (The procedure for fixing the identification labels is described in detail in the instruction sheet provided with the cable.)
IM 12B0702-01E
Appendix 11-3

11-3-1. Connection cable

To connect the other sensor systems, follow the general pattern of the terminal connections as
listed below: 11 & 12 Temperature compensation resistor input (Pt100, Pt1000, 3kPTC, 5.1kPTC, 8.55kNTC, 350PTC, 6.8kPTC, 10kPTC) 13 Input no. 2 (normally the reference element) 14 Liquid earth (solution ground) connection 15 Input no. 1 (normally the measuring element) 16 Screen (shield) for input no. 1 17 Screen (shield) for input no. 2
In connecting to a general purpose pH sensor
PH8EFP PH8ERP PH8EHP
WTB10-PH1 *1
Terminal Box
15
16
13
12
11
141
PH202G, S
pH/ORP transmitter
*2
15
16
13
12
11
14
In connecting to a special purpose pH sensor
WTB10-PH2 *3
Terminal Box
HA405 HF405 DPA405 DPAS405
SA405
*1 : Terminal Box is used only when pH/ORP transmitter is installed far from the cable length of pH/ORP sensor. *2 : The cable is specified by an option code of the terminal box. *3 : Use the box in combining PH202 with SA405.
15
16
13
12
11
14
PH202G, S
pH/ORP transmitter
*2
15
16
13
12
11
14
In connecting to a gerneral purpose ORP sensor
WTB10-PH1 *1
Terminal Box
15
OR8EFG OR8ERG
16
13
12
11
14
In connecting to a special purpose ORP sensor
WTB10-PH1 *1
Terminal Box
HA485 DPA485 DPAS485
15
16
13
12
11
14
Figure 11-1 Wiring of a sensor
PH202G, S
pH/ORP transmitter
*2
PH202G, S
pH/ORP transmitter
*2
15
16
13
12
11
14
15
16
13
12
11
14
F3.6.1E.eps
IM 12B07D02-01E
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