YOKOGAWA PH202G User Manual
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YOKOGAWA PH202G User Manual

2-wire type ph/orp(redox) transmitter
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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

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Summary of Contents for YOKOGAWA PH202G

  • Page 1 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...

  • Page 2: Table Of Contents

    3-6-3. Sensor cable connections using junction box (BA10) and extension cable (WF10) ...3-11 3-6-4. Connection VP type sensor ...................3-11 In this manual a sign appears if it concerns the PH202G (S)-E, -C, -U, -N, -K IM 12B07D02-01E 11th Edition: Oct. 2009(YK) All Rights Reserved , Copyright ©...
  • Page 3 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.
  • Page 4 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...
  • Page 5 IM 12B07D02-01E...

  • Page 6: Preface

    Although the instrument has a weatherproof Yokogawa is not responsible for damage to the construction, the transmitter can be harmed if it instrument, poor performance of the instrument becomes submerged in water or becomes exces- or losses resulting from such, if the problems are sively wet.
  • Page 7 The following safety symbols are used on the Warranty and service Yokogawa products and parts are guaranteed product as well as in this manual. free from defects in workmanship and material DANGER under normal use and service for a period of...
  • Page 8 Yokogawa le plus proche. tedesco e francese. Se si desidera ricevere i man- uali operativi di prodotti Ex in lingua locale, met- tersi in contatto con l’ufficio Yokogawa più vicino o con un rappresentante. Alle Betriebsanleitungen für ATEX Ex bezogene Produkte stehen in den Sprachen Englisch, Deutsch und Französisch zur Verfügung.
  • Page 9 IM 12B07D02-01E...

  • Page 10: Introduction And General Description

    This manual also includes a basic troubleshooting guide to answer typi- cal user questions. Yokogawa can not be responsible for the performance of the EXA analyzer if these instructions are not followed. 1-1. Instrument check...
  • Page 11 1-2 Introduction PH/ORP TRANSMITTER DISSOLVED OXYGEN TRANSMITTER DISSOLVED OXYGEN TRANSMITTER MODEL PH202G-P MODEL PH202S-K MODEL PH202G-F SUFFIX SUFFIX SUFFIX SUPPLY 24V DC OUTPUT 4 20mA DC SUPPLY 9 TO 32VDC SUPPLY 9 TO 32VDC -10 55°C AMB.TEMP. OUTPUT PROFIBUS-PA OUTPUT...

  • Page 12: Application

    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 man- ual in conjunction with the corresponding sensor user’s manual.
  • Page 13 1-4 Introduction IM 12B07D02-01E...

  • Page 14: Ph202 Specifications

    Voltage (V) F2.1E.eps - Range :–30 ºC to 140 ºC Fig. 2-1. Supply voltage/ load diagram for the PH202G (for 8.55kΩ sensor –10 ºC to 120 ºC) Sensor types: Pt100, Pt1000, 3kΩ PTC, 5.1kΩ PTC, 8.55kΩ NTC, 350Ω PTC, 6.8kΩ PTC, 10kΩ PTC Automatic or manual compensation to Nernst equation.

  • Page 15: Operating Specifications

    2-2 Specification Cable and terminals : 2-2. Operating specifications The PH202 is equipped with terminals suitable for the connection of finished A. Performance : pH - Linearity ±0.01 pH cables in the size: 0.13 to 2.5 mm (26 to - Repeatability: ±0.01 pH 14 AWG) - Accuracy :...
  • Page 16 Specification 2-3 O. Intrinsically safe Refer to conrol drawings. Item Description Code Item Description Code FM Intrinsically safe Approval FM Non-incendive safe Approval Applicable standard: FM3600, FM3610, FM3810 Applicable standard: FM3600, FM3611, FM3810 Intrinsically Safe for Class I, Division 1, Groups ABCD Non-incendive for Class I, Division 2, Groups ABCD, Factory Class I, Zone 0, AEx ia IIC...
  • Page 17 G. Configuration : Local with 6 keys • Electrostatic charges on the display window shall be avoided. H. Software : Firmware based on Yokogawa stack. • The external earth connection facility shall be I. Hardware : Yokogawa HART® Modem F9197UB connected reliably.
  • Page 18 K. Other control: Siemens PDM systems FBUS) L Electrical connection: M. Other control systems: Terminals acc. to IEC 1158-2 YOKOGAWA PRM, DTM 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)

  • Page 19: Model And Suffix Codes

    Screw terminal (*2) Epoxy baked finish (*3) ( *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.

  • Page 20: Control Drawing Of Ph202S Ma Hart ® Specification (Iecex)

    Specification 2-7 2-4. Control Drawing of PH202S mA HART ® Specification (IECEx). Intrinsically safe design EX ia or ib IEC-Ex standard EX ia IIC : T4 for ambient temp. < 55°C C ertified safety barrier or pow er T6 for ambient temp. < 40°C w ith R int=300 C ertificate nr.

  • Page 21: Control Drawing Of Ph202S Ma Hart ® Specification (Atex)

    2-8 Specification 2-5. Control Drawing of PH202S mA HART ® Specification (ATEX) Intrinsically safe design C EN ELEC standard EEX ia IIC : T4 for ambient temp. < 55°C EEx ia or ib C ertified safety barrier or pow er T6 for ambient temp.

  • Page 22: Control Drawing Of Ph202S Ma Hart ® Specification

    Specification 2-9 2-6. Control Drawing of PH202S mA HART ® Specification (FM Intrinsically safe design) Intrinsically safe design FM Approved safety barrier or FM Class I, Div.1, Group ABCD, T4 for ambient temp. < 55°C power supply T6 for ambient temp. < 40°C with Rint = 300 PH202S transmitter (HART compatible)

  • Page 23: Control Drawing Of Ph202S Ma Hart ® Specification

    2-10 Specification 2-7. Control Drawing of PH202S mA HART ® Specification (FM Non-incendive design). N o n in c e n d iv e d e s ig n C la s s I, D iv .2 , G ro u p A B C D , T 4 fo r a m b ie n t te m p .

  • Page 24: Control Drawing Of Ph202S Ma Hart ® Specification (Csa)

    Specification 2-11 2-8. Control Drawing of PH202S mA HART ® Specification (CSA). Intrinsically safe design C S A certified C SA Ex ia C lass I, D iv.1, G roup A B C D safety barrier or pow er supply T4 for am bient temp.

  • Page 25: Control Drawing Of Ph202S Ff/Pb Specification (Iecex)

    2-12 Specification 2-9. Control Drawing of PH202S FF/PB Specification (IECEx) Ex ia IIC T4 for ambient temp. 55 C Ui = 24 V Ui = 17,5 V Ii = 250 mA Ii = 380 mA Pi = 1,2 W Pi = 5,32 W PH202S-F or PH202S-P Sensor...

  • Page 26: Control Drawing Of Ph202S Ff/Pb Specification (Atex)

    Specification 2-13 2-10. Control Drawing of PH202S FF/PB Specification (ATEX) Ex ia IIC T4 for ambient temp. 55 C Ui = 24 V Ui = 17,5 V Ii = 250 mA Ii = 380 mA Pi = 1,2 W Pi = 5,32 W PH202S-F or PH202S-P Sensor...

  • Page 27: Control Drawing Of Ph202S Ff/Pb Specification

    2-14 Specification 2-11. Control Drawing of PH202S FF/PB Specification (FM Intrinsically safe Entity). FM Class I, DIV. 1, Group ABCD Sensor T4 for ambient temp. 55 C Connections Max. cablelength: 60 mtr. PH202S-F Cable dia. : 3…12 mm. or PH202S-P Sensor Connections FM Approved...
  • Page 28 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. The cable used to interconnect the devices needs to comply with the following parameters: Loop resistance R’: 15 …...

  • Page 29: Control Drawing Of Ph202S Ff/Pb Specification

    2-16 Specification 2-12. Control Drawing of PH202S FF/PB Specification (FM Intrinsically safe FISCO) FM Class I, DIV. 1, Group ABCD Sensor T4 for ambient temp. 55 C Connections PH202S-F Max. cablelength: 60 mtr. or PH202S-P Cable dia. : 3…12 mm. Sensor Connections FM Approved...
  • Page 30 Specification 2-17 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 50μA for each connected device.

  • Page 31: Control Drawing Of Ph202S Ff/Pb Specification

    2-18 Specification 2-13. Control Drawing of PH202S FF/PB Specification (FM Non-incendive Entity). FM Class I, DIV. 2, Group ABCD T4 for ambient temp. 55 C Sensor T6 for ambient temp. 40 C Connections PH202S-B Max. cablelength: 60 mtr. or PH202S-D Cable dia.: 3…12 mm.

  • Page 32: Control Drawing Of Ph202S Ff/Pb Specification

    Specification 2-19 2-14. Control Drawing of PH202S FF/PB Specification (FM Non-incendive FNICO) FM Class I, DIV. 2, Group ABCD T4 for ambient temp. 55 C Sensor T6 for ambient temp. 40 C Connections PH202S-B Max. cablelength: 60 mtr. or PH202S-D Cable dia.: 3…12 mm.

  • Page 33: Control Drawing Of Ph202S Ff/Pb Specification (Csa)

    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. 55 C Ui = 24 V Ui = 17,5 V Ii = 250 mA Ii = 380 mA Pi = 1,2 W Pi = 5,32 W PH202S-F...

  • Page 34: Installation And Wiring

    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).
  • Page 35 3-2 Installation and wiring Unit: mm (inch) (0.14) SPACING PANEL CUTOUT PANEL CUTOUT Fig. 3-2b. Panel mounting using two (2) self-tapping screws Unit: mm (inch) Pipe mounting Pipe mounting (Vertical) (Horizontal) (2.20) 2-Ø6.5 (0.26) (7.87) 4-Ø10 (0.4) (4.5) (2.75) Nominal 50 A (O.D. Ø60.5 mm) (2 inch pipe) 4.eps Figure 3-3.

  • Page 36: Preparation

    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.

  • Page 37: Wiring Of Sensors

    TEMP.MAN. F AIL MODE MEASURE AUT.CAL YES NO MAN.CAL DISPLA Y TEMP HOLD MODE > YOKOGAWA Computer Sensors Output/supply Input 2 , 5 or 10 m Distributor 1 0 0 1 8 0 Recorder Safety Barrier PH202S only ref pH/ORP emp.

  • Page 38: Installation In: Hazardous Area-Non-Incendive

    In addition to that the sensor checking circuits also use the liquid earth for meas- urement of impedance of the sensors. All Yokogawa fittings have provisions for this connection. It is usu- ally called liquid earth in all our manuals.

  • Page 39: Connection Of The Power Supply

    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.

  • Page 40: Wiring The Sensor System

    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.

  • Page 41: Sensor Wiring

    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.

  • Page 42: Connection Cable

    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:...

  • Page 43: Sensor Cable Connection With Special Grommet

    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...

  • Page 44: Sensor Cable Connections Using Junction Box (Ba10) And Extension Cable (Wf10)

    Where a convenient installation is not possible using the standard cables between sensors and transmit- ter, 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 neces- sary to ensure that the specifications of the system are not compromised.
  • Page 45 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.

  • Page 46: Operation; Display Functions And Setting

    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.

  • Page 47: Explanation Of Operating Keys

    Adjustment keys mode key > : Choose digit to Broken line indicates area that can be adjust YOKOGAWA seen through front cover : Adjust digit ENT : Confirm change Figure 4-1. PH202 operator interface 4-2. Explanation of operating keys MODE key This key toggles between the measuring and maintenance modes.

  • Page 48: Setting Passcodes

    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 commis- sioning (setup) of the instrument.

  • Page 49: Display Functions

    A U T . C A L OUTPUT M A N . C A L SET HOLD Press YES to fix D I S P L A Y SERVICE TEMP the selected second HOLD line of display MODE YOKOGAWA 12C6C3-20-1.ai IM 12B07D02-01E...

  • Page 50: Display Functions Ph (Orp)

    Operation 4-5 4-5-2. Display functions pH (ORP) Service Code 01 Set for pH. Service Code 02 Set for ORP on parameter 2. MEASURE AUT.CAL MAN.CAL DISPLAY TEMP. HOLD MODE "Logbook Scrolling" Logbook data is available only in instruments with "PIN" for advanced function AUT.CAL The display can give information DISPLAY...

  • Page 51: Display Functions Ph (Rh)

    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. MEASURE AUT.CAL Temp Display MAN.CAL DISPLAY DISPLAY TEMP. HOLD MODE See Auto Cal Chapter 6 AUT.CAL DISPLAY rH Display See Man Cal Chapter 6 Current...

  • Page 52: Parameter Setting

    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.

  • Page 53: Manual Temperature Selection And Adjustment

    5-2 Parameter setting 5-1-1. Manual temperature selection and adjustment pH selected in service code 01. MODE FAIL Measure OUTPUT SET HOLD SERVICE MODE YOKOGAWA MODE AUT.CAL TEMP. TEMP .MAN. keys to adjust and enter manual temperature setting IM12B07D02-01E...

  • Page 54: Process Temperature Measuring In Orp Mode

    Parameter setting 5-3 5-1-2. Process temperature measuring in ORP mode ORP selected in service code 01. MODE MEASURE OUTPUT SET HOLD SERVICE MODE YOKOGAWA MODE MAN.CAL TEMP. Display return to measuring mode with temperature reading. MEASURE IM12B07D02-01E...

  • Page 55: Manual Activation Of Hold

    5-4 Parameter setting 5-1-3. Manual activation of HOLD MODE M E A S U R E OUTPUT SET HOLD SERVICE MODE YOKOGAWA MODE HOLD AUT.CAL HOLD MEASURE Note: The HOLD feature must first be activated in the commissioning mode section 5-2-2. IM12B07D02-01E...

  • Page 56: Manual Impedance Check

    Service MODE Code 3 and 4. This enables the impedance data to be updated immediately after a maintenance event (e.g.replacing an electrode). MEASURE OUTPUT SET HOLD SERVICE MODE YOKOGAWA MODE AUT.CAL Return to measuring mode after updating impedance check IM12B07D02-01E...

  • Page 57: Commissioning Mode

    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. (*OUTP) For enhanced resolution in more stable measuring processes, it may be desir- able to select 5 - 10 pH range, for example.
  • Page 58 5-2-1. Output range MODE MEASURE AUT.CAL OUTPUT MAN.CAL SET HOLD DISPLAY SERVICE TEMP HOLD MODE YOKOGAWA Note: When rH or ORP is enabled in codes 02 and 31, the output range is set in a similar way to pH. IM12B07D02-01E...
  • Page 59 5-8 Parameter setting 5-2-2. Hold MODE MEASURE AUT.CAL OUTPUT MAN.CAL SET HOLD DISPLAY SERVICE TEMP HOLD MODE YOKOGAWA HOLD deactivated, return to commissioning menu. HOLD HOLD YES NO HOLD active last measured value. IM12B07D02-01E...
  • Page 60 Parameter setting 5-9 HOLD value set, return to commissioning menu. HOLD HOLD HOLD HOLD Set HOLD "fixed value" for mA output IM12B07D02-01E...

  • Page 61: Service

    MAN.CAL SET HOLD DISPLAY SERVICE TEMP HOLD MODE Example: Service Code 01 YOKOGAWA Select main parameter for pH for ORP With the >, ,ENT keys Wait screen is displayed Wait screen is displayed briefly before returning briefly before returning to to commissionning menu.

  • Page 62: Notes For Guidance In The Use Of Service Coded Settings

    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.
  • Page 63 5-12 Parameter setting Code Display Function Function detail Default values Parameter specific functions *PH.ORP Select main parameter pH *PRM.2 Enable 2nd parameter Off *Z1.CHK Impedance check 1 1.1.1 High High Temp comp off Temp comp on Imp check off Imp check on *Z.L.xΩ...

  • Page 64: Temperature Compensation And Measuring Functions

    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.
  • Page 65 5-14 Parameter setting Code Display Function Function detail Default values Temperature measuring and compensation functions *T.SENS Temperature sensor Pt1000 Pt1000 Pt100 3kBalco 8k55 PTC10k *T.UNIT Display in °C or °F °C °C °F *T.ADJ Calibrate temperature Adjust to allow for cable resistance None *T.COMP Set temp comp...

  • Page 66: Calibration Functions

    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.
  • Page 67 5-16 Parameter setting Code Display Function Function detail Default values Calibration functions *∆t.SEC Stability check time 5 sec. *∆PH Stability check pH 0.02 pH *AS.LOW As Pot low limit -120 mV (As Pot) *AS.HI As Pot high limit 120 mV *ZP.LOW Zero Point low limit 5.00 pH...
  • Page 68 Parameter setting 5-17 5-3-4. mA output functions 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...

  • Page 69: Ma Output Functions

    5-18 Parameter setting Code Display Function Function detail Default values mA Outputs Not used *OUTP.F mA output functions Code 01 set for pH pH (table) Parameter 2 (with suitable sensor(s), and when enabled in code 02) *BURN Burn function No burnout No Burn.

  • Page 70: User Interface

    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...
  • Page 71 5-20 Parameter setting Code Display Function Function detail Default values User interface *RET. Auto return Auto return to measuring mode Off Auto return to measuring mode On *MODE Mode setup Manual impedance check Off Manual impedance check On *PASS Passcode Maintenance passcode Off 0.0.0 Off Note # = 0 - 9, where...

  • Page 72: Communication Setup

    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. Code 61...
  • Page 73 5-22 Parameter setting Code Display Function Function detail Default values Communication *COMM. Communication Set HART® communication Set HART® communication write enable write write protect enable Set communication PH201 Without half time check With half time check *ADDR. Network address Set address 00 to 15 *HOUR Clock setup Adjust to current date and time using...

  • Page 74: Calibration

    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.

  • Page 75: Calibration Procedures

    Press YES to start calibration. MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD MODE YOKOGAWA Note: To start calibration with another solution, press NO to cycle through the other options. "CAL 7" "CAL 4" "CAL 9" "CAL 7" The instruments waits for the reading to stabilize.

  • Page 76: Automatic Calibration With Hold Active

    MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD MODE HOLD YOKOGAWA Note: To start calibration with another solution, press NO to cycle through the other options. "CAL 7" "CAL 4" "CAL 9" "CAL 7" HOLD The instruments waits for the reading to stabilise.

  • Page 77: Manual Calibration (2Nd Parameter Calibration)

    Press YES or NO at NEW.SNS prompt. MEASURE AUT.CAL MAN.CAL DISPLAY TEMP HOLD MODE YOKOGAWA (Note: Press NO to start calibration of zero point when Put sensors in buffer enabled in Service Mode). solution. Press YES. Set the value using the >, , ENT key.
  • Page 78 Calibration 6-5 Manual Calibration of Manual Calibration of mV zero point according offset for ORP (2nd parameter). to IEC 60746-2. Where both pH and ORP (or rH) When enabled in service are measured, the offset (Asymmetry code 27. potential) of the second parameter is calibrated as shown below.

  • Page 79: Sample Calibration

    AUT.CAL MAN.CAL DISPLAY TEMP HOLD MODE YOKOGAWA Press YES at the same time as taking sample for analysis. PH 202 now continues to measure/control, as before. SAMPLE flashes to indicate that data is stored waiting for input of analyzed value.
  • Page 80 Calibration 6-7 When the laboratory analysis is completed the data is entered by first pressing MODE, then following the sequence below MODE MAN.CAL Return to maintenance menu Quit MAN.CAL For first calibration of a new sensor MAN.CAL To calibrate ORP or rH Note: Display shows the value as at the time of taking the sample.

  • Page 81: Maintenance

    (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.

  • Page 82: Calibration Procedures Are Described In Step-By-Step Detail In Chapter 6. However, Follow These Guidelines

    CO 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.

  • Page 83: Troubleshooting

    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.

  • Page 84: Diagnostics

    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.
  • Page 85 Check cabling Sensor(s) defective Replace sensor(s) EEPROM write failure Fault in electronics Try again, if unsuccessful contact Yokogawa Wash recovery check error Measuring sensor aged Replace measuring sensor (if communication is set to pH201*B in code Sensor still coated after washing...

  • Page 86: Spare Parts

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

  • Page 87: Appendix

    Appendix 10-1 10. APPENDIX 10-1. User setting table FUNCTION SETTING DEFAULTS USER SETTINGS Parameter specific functions *PH.ORP *PRM2 *Z1.CHK 1.1.1 High range, TC on check on, *Z2.CHK 0.0.1 Low range, TC off check off no TC *CAL.CK AP on, Slope on Temperature functions *T.SENS Pt1000...
  • Page 88 10-2 Appendix FUNCTION SETTING DEFAULTS USER SETTINGS User interface *RET. *MODE *PASS 0.0.0 all off *Err.4.1 hard fail *Err.5.1 hard fail *Err.4.2 hard fail *Err.5.2 hard fail *Err.07 hard fail *Err.08 hard fail *Err.09 hard fail *Err.11 soft fail *Err.16 soft fail *CALL.M 250 days...

  • Page 89: Configuration Checklist For Ph202G

    Appendix 10-3 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...

  • Page 90: Setup For Sensor Compatibility

    Service Codes found in Chapter 5 of this manual. • 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.

  • Page 91: Set Up For Other Functions

    Appendix 10-5 10-4. Set up for other functions • 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.

  • Page 92: Set Up For Pfaudler Type 18 Sensor

    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.

  • Page 93: Device Description (Dd) Menu Structure

    10-6. Device Description (DD) menu structure The Device Description (DD) is available from Yokogawa or the HART foundation. An example is shown below of the ON LINE menu structure. This manual makes no attempt to explain the operation of the Hand Held Terminal (HHT).
  • Page 94 1. Date Z2.(cal) 2. Descriptor Stab.time. 3. Message I.T.P. 4. Write protect Zero.pnt 5. Manufacturer New sensor 6. Dev id One.p cal Two.p cal Continued next page (Note): HART protocol DD files can be downloaded by following URL. http://www.yokogawa.com/an/download/an-dl-fieldbus-001en.htm IM 12B07D02-01E...
  • Page 95 Appendix 10-9 (Continued) Level 1 menu Level 2 menu Level 3 menu Level 4 menu Level 5 menu Level 6 menu 4.Detailed setup 1. Param. specific 1. SV Meas. 2. SV Param. 1. Z1 Comp 3. Z1 setup 2. Z1 Meas. 1.
  • Page 96 10-10 Appendix IM 12B07D02-01E...

  • Page 97: Glossary 11

    Glossary Glossary (-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 approxi- mately 1 Normal NaOH).

  • Page 98: Preface

    (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.

  • Page 99: Wiring Diagrams

    *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) .

  • Page 100: Connection Cable

    Screen (shield) for input no. 1 Screen (shield) for input no. 2 In connecting to a general purpose pH sensor In connecting to a gerneral purpose ORP sensor WTB10-PH1 *1 PH202G, S WTB10-PH1 *1 PH202G, S Terminal Box pH/ORP transmitter...
  • Page 101 16 (Yellow) Cables, terminals and glands For the PH202G, PH202SJ use cable of outside diameter 6 to 12 mm. When using individual electrodes -- glass electrode, reference electrode -- and separate temperature sensor, rather than an all-in-one sensor, use the circular packing with four holes. Plug the unused hole in the packing with the black plug.

  • Page 102: Sensor Cable Connection Using Terminal Box

    (WTB10-PH1, -PH2) and use an extension cable. You should order these from Yokogawa, as these Yokogawa parts are specially designed so that system specifications will be met. The total cable length (for 5 m electrode cable plus 15 m extension cable) may be up to 20 m.

  • Page 103: The Setting Of Sending Wash Signal (*Wash)

    DISPLAY SERVICE TEMP HOLD MODE YOKOGAWA keys to adjust and enter manual temperature setting F5.2.3E. eps The contact output for wash can be controlled by sending wash siganals. This function is available with the PH201G (style B). Control the contact output in combination of the PH202 and the PH201G (style B).
  • Page 104 Appendix 11-7 You can individually set the wash period "interval between wash cycles", tl; the wash time "length of the wash phase", tw; and the recovery time, tR During the recovery phase of the wash cycle, the detector checks if the sensor response is sluggish - - the detector checks if the time to recover half the wash-cycle pH change (1/2∆pH) is within one third of the recovery time (1/3tR) setting -- to determine if the sensor requires manual cleaning or is near the end of its useful life.

  • Page 105: How To Output Manual Wash Signal

    MODE MEASURE OUTPUT SET HOLD SERVICE MODE YOKOGAWA MODE MODE AUT.CAL T5.1.5E.eps Note : Wash functuon is only avairable when using the PH201G(style B) distributor. In using the function, it is necessary to set 2.0 or 2.1 at service code 60, enabling the PH202 to communicate with the PH201G (Style B).

  • Page 106: Setting Of Errors (Fail Contact)

    Appendix 11-9 11-4-4. Setting of errors (FAIL contact) Code 53 *Err.4.1-*Err .16 (9 items) These set how errors are notified to the user. Either of two modes can be set. "Hard Fail" mode lights the "FAIL" indicator on the LCD panel. When "enable status output contact"...

  • Page 107: Calibration In Orp Mode

    A solution of known ORP (Oxygen Reduction Potential) is used. Usually quinhydrone or ferric chloride solution is used as the test solution. Yokogawa sells the following chemicals for making test solution. The procedure for mixing solution is described below. Quinhydrone salts (P/N K9024EC) and Ferrous & Ferric salts (P/N K9024ED)

  • Page 108: Manual Calibration

    Appendix 11-11 (6) After the display reading has stabilized, read and note it. Measure the temperature of the test solution, and check the ORP of the test solution at that temperature using Fig. 11-3. If the ORP reading is within the tolerance shown in Fig. 11-3 then the sensor is normal. Note: If the measurement value is only slightly out of tolerance, you should check whether the test solution was fresh and whether it was mixed in the correct amounts (see mixing instructions above).

  • Page 109: Calibration Procedure

    11-12 Appendix 11-5-5. Calibration Procedure (1) Manual Calibration This involves calibration by direct entry of ORP sensor zero offset. 1) Press the MODE key. 2) MAN.CAL is displayed. (If you press NO then you will proceed to calibration with sample). 3) Press YES.

  • Page 110: Supplement Of Troubleshooting

    (-1500 to 1500 mV for ORP) Sensor(s) defective Replace sensor(s) EEPROM write failure Fault in eledtronics Try agein, if unsuccessful contact Yokogawa Wash recovery check error Measring sensor aged Replace measuring sensor ( if communication is set to PH201(Style B) Sensor still coated after washing...

  • Page 111: On-Line Impedance Checks

    ENT keys to set the value T5.3.1E.eps Yokogawa sensors with the liquid earth electrode include the PH8EFP, PH8ERP, PH8EHP, OR8ERG, OR8EFG and FU20. The liquid earth electrode is inside the sensor, and at the potential of the measured solution. The liquid earth electrode is also used for an impedance check (to determine if a functional sensor is connected).

  • Page 112: Supplement Of Temperature Sensor

    When the temperature sensor is not connected with the transmitter (when no connections are made to terminals 11 and 12), set the manual temperature compensation (refer to Section 5-1-1). Yokogawa’s pH sensors, Models HA405, DPA405, DPAS405 and HF405, do not have a built-in temperature sensor.

  • Page 113: Appendix 3 Quality Inspection

    Quality PH202G, PH202SJ Inspection 2-Wire pH/ORP Transmitter Standards Scope This inspection standard applies to the PH202G, PH202SJ 2-Wire pH/ORP Transmitter. Inspection Items 2.1 Insulation resistance test 2.2 Current output test 2.3 Temperature indication check 2.4 pH indication check 2.5 ORP indication check Inspection Methods, Standards and Conditions Connect the testing circuit as shown in Figure 1.
  • Page 114 12-2 Appendix f. Press the [ ] key seven times. The data display will show “87” with the second digit of 7 flashing. g. Press the [ENT] key. The message display will show “ PASS .” (2) Setting Password 070 a.
  • Page 115 -1500 -1500 ±1 0 ±1 +1500 +1500 ±1 Press the [ENT] key until the message display shows “READY.” Press the [ENT] key again to end the tests. PH202G, PH202SJ SUPPLY TEMP INPUT 2 INPUT 1 HIGH IMP LOW IMP Shorting bar...
  • Page 116 12-4 Appendix IM 12B07D02-01E...

  • Page 117: Ph202S 2-Wire Ph/Orp Transmitter

    Appendix 12-5 12-2. PH202S 2-Wire pH/ORP Transmitter Quality PH202S Inspection 2-Wire pH/ORP Transmitter Standards Scope This inspection standard applies to the PH202S 2-Wire pH/ORP Transmitter. Inspection Items 2.1 Insulation resistance test * 2.2 Dielectric strength test 2.3 Current output test 2.4 Temperature indication check 2.5 pH indication check 2.6 ORP indication check...
  • Page 118 12-6 Appendix Current Output Test Connect the instruments as shown in Figure 1, and set them as follows. Connect a shorting bar between terminals LOW and IMP. Decade resistance box: 921.6 Standard voltage/current source: 0 mV DC source: 24 V DC Use the following procedure to enter the inspection mode.
  • Page 119 Appendix 12-7 Table 2 Data Display Reference Temperature Resistance Box Resistance (°C) (°C) 921.6 -20.0 ±0.3 1097.3 +25.0 ±0.3 +130 1498.3 +130.0 ±0.3 pH Indication Check Following Section 3.4, press the [ENT] key until the message display shows “PH.INP.” In this state, change the simulation input as shown in Table 3 by means of the standard voltage/current source and check the data display.
  • Page 120 12-8 Appendix IM 12B07D02-01E...

  • Page 121: Ph202G, Ph202S 2-Wire Ph/Orp Transmitter

    PH202G, PH202S 2-Wire pH/ORP Transmitter Inspection (Fieldbus Communication) Standards Scope This inspection standard applies to the PH202G and PH202S 2-Wire pH/ORP Transmitters (Fieldbus specification ) Inspection Items 2.1 Insulation resistance test * 2.2 Dielectric strength test 2.3 Temperature indication check 2.4 pH indication check...
  • Page 122 12-10 Appendix Table 1 Resistance Box Resistance Data Display Reference Temperature (°C) (°C) 921.6 -20.0 ±0.3 1097.3 +25.0 ±0.3 +130 1498.3 +130.0 ±0.3 pH Indication Check Set the instrument as follows. Decade resistance box: 1000 Ω Change the simulation input value of the standard voltage generator as shown in Table 2. The corresponding pH data must be within the range.
  • Page 123 Appendix 12-11 Fieldbus Communication Functional Check Check for normal function using Fieldbus equipment specified by Yokogawa. Figure 1 Testing Circuit and Test Equipment QIS 12B07D02-61E IM 12B07D02-01E...
  • Page 124 12-12 Appendix IM 12B07D02-01E...

  • Page 125: Ph202G, Ph202S 2-Wire Ph/Orp Transmitter

    PH202G, PH202S 2-Wire pH/ORP Transmitter Inspection (Profibus Communication) Standards Scope This inspection standard applies to the PH202G and PH202S 2-Wire pH/ORP Transmitters (Profibus specification ) Inspection Items 2.1 Insulation resistance test * 2.2 Dielectric strength test 2.3 Temperature indication check 2.4 pH indication check...
  • Page 126 12-14 Appendix Table 1 Resistance Box Resistance Data Display Reference Temperature (°C) (°C) 921.6 -20.0 ±0.3 1097.3 +25.0 ±0.3 +130 1498.3 +130.0 ±0.3 pH Indication Check Set the instrument as follows. Decade resistance box: 1000 Ω Change the simulation input value of the standard voltage generator as shown in Table 2. The corresponding pH data must be within the range.
  • Page 127 Appendix 12-15 Profibus Communication Functional Check Check for normal function using Profibus equipment specified by Yokogawa. In the tests of Item 3.3 to 3.5, check the communication function using Profibus communication. PH202 SUPPLY INPUT2 INPUT1 – LOW IMP HIGH IMP...
  • Page 128 12-16 Appendix IM 12B07D02-01E...

  • Page 129: Customer Maintenance Parts List (Ph202G Style : S3)

    Customer Model PH202G [Style : S3] Maintenance 2-wire pH/ORP Transmitter Parts List Item Part No. Description Cover Assembly K9315CA Polyurethane Coating K9315CN Epoxy-polyester Coating Internal Works Assembly with amplifier assembly K9661AD For mA + HART K9661AE For FF K9661AF For Profibus...
  • Page 130 Pipe/Wall Mounting Hardware (Option Code : /U) Panel Mounting Hardware (Option Code : /SCT) Option Code : /H Hood to sun protection (Option Code : /PM) Item Parts No. Description K9171SS Universal Mount Set (/U) K9311BT Tag Plate (/SCT) K9311KA Fitting Assembly (/PM) K9311KG Hood Assembly (/H)
  • Page 131 Customer Model PH202S [Style : S3] Maintenance 2-wire pH/ORP Transmitter Parts List Item Part No. Description Cover Assembly K9315CA Polyurethane Coating K9315CN Epoxy-polyester Coating Internal Works Assembly with amplifier assembly For mA + HART For FF For Profibus For mA + HART (Non-incendive) Housing Assembly Polyurethane Coating Epoxy-polyester Coating...
  • Page 132 Pipe/Wall Mounting Hardware (Option Code : /U) Panel Mounting Hardware (Option Code : /SCT) Option Code : /H Hood to sun protection (Option Code : /PM) Item Parts No. Description K9171SS Universal Mount Set (/U) K9311BT Tag Plate (/SCT) K9311KA Fitting Assembly (/PM) K9311KG Hood Assembly (/H)
  • Page 133 PH202SJ [style : S1]. Mar. 2007 All over revised ( style of PH202G changed to S3, and PH202S changed to S2.) Oct. 2007 PREFACE-1, Some of warning description modified; P. 1-1, Some of nameplate in Figure 1-1 changed; P. 1-2, Some of nameplate in Figure 1-2 changed;...
  • Page 134 Edition Date Remark (s) 11th Oct. 2009 PREFACE, "Zone 0" added to Warning label explanation; P.1-2, Name plate of PH202S-K (NEPSI) added to Figure 1-2; P.2-2, Some revision of N. Regulatory compliance (description for EMC revised); P.2-3 to 2-4, Some revision of IECEx Intrinsically safe description ("Zone 0"...
  • Page 135 Transmitter Supplement Thank you for selecting our Model PH202G [Style: S3], Model PH202S [Style: S3] pH/ORP Transmitter. User's Manual, IM 12B07D02-01E, 11th Edition, supplied with the product, some revisions/additions have been made. Please replace the corresponding pages in your copy with the attached, revised pages.
  • Page 136 Handle Yokogawa is not responsible for damage to the with care. instrument, poor performance of the instrument or losses resulting from such, if the problems...
  • Page 137 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.
  • Page 138 11-16 Appendix 11-7. Temperature coefficient (*T.COEF) setting at the time of conversion to reference temperature This is settable only when conversion to reference temperature (*T.COMP) is set to 1 (ON) at service level code No. 13. If turned to 0 (OFF), this menu will be skipped. For conversion to reference temperature (reference temperature : 25°C ), set the coefficient between -1.00 and 1.00 [(pH/ °C) x10].

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