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Model DO402G Dissolved Oxygen Converter [Style: S3]

1. WASH ACTIVE press YES to stop Note Relay S3 must first be set for WASH in service code 42 Manual wash start stop is enabled with Service code 51 Refer to commissioning mode section 5 2 4 for automatic cycle timing setup Manual temperature adjustment menu is added to the maintenance mode Manual temperature adjustment is only visible if the manual temperature in service code 13 is enabled When the manual temperature is entered set the manual temperature and press enter IM 12J05D02 01E 5 4 Parameter setting 5 1 3 Setpoint adjustment Note To enable adjustment of setpoints in Asle maintenance mode Service Code 51 SETPOINTS must be set to ON Setpoints available will depend on their configuration in the Service Code CONTACTS CE 9s Qs MARKINGS YOKOGAWA WITHIN ENCLOSURE MODE AIR CAL For adjustments follow procedures as in section 5 2 1 RAE TE YES NO Setpoint 3 and 4 when enabled in service codes 42 and 43 Setpoint analogue For adjustments control output mA2 D follow procedures when enabled in code 31 as in section 5 2 1
2. gt X Ri NG YES NO ARENA KHL J Y KWASH INA 7 MAK Do IM 12J05D02 01E Parameter setting 5 9 Choose Range to adjust then set begin scale 0 and end scale 100 of the mA output signal using the gt and ENT keys Selection of mA output 0 20 4 20 mA is in Service Code 30 Note Range 2 does not appear Range Selection Options when PI control or table set are determined by Service on mA2 Code 31 V XRNG IB XUX 4 XTEMP NO YES YES ARANLO fa XRANG NO Range values set returnto commission mode RANGE YES NO XRANGE YES NO IM 12J05D02 01E 5 10 Parameter setting 5 2 3 Hold MEASURE IAIR CAL SETPOINTS H20 CAL RANGE MAN CAL SET HOLD DISPLAY WASH SERVICE ES
3. om J gt zy S 2 LY u DO70G STE LI 7 BROWN BLUE SENSOR 1 TO SENSOR Detail 2 DOX10 Connections of the sensor cable and DOX10 terminals Detail 1 DO402G are shown in the following table Connections of the sensor cable and DO402G terminals DO70G Wiring color DOX10 terminal No are shown in the following table BROWN BROWN DO70G Wiring color DO402G Terminal No BLUE BLUE Red 18 Clear 17 Green Yellow 14 Green 12 White 11 Fugire 3 13 Wiring optical sensor DO70G 3 9 Wiring polarographic sensors Consult the owners manual for the color identification of the sensor cable and connect temperature com pensator cathode and anode to terminals 11 12 17 and 18 in this sequence Connect the cable shield when provided to terminal 14 Note A jumper cable is placed to connect converter terminals 13 and 17 When a polarographic sensor is to be connected the cable is not used so disconnect it It is recommended to save the jumper cable for future use if may be needed when a galvanic sensor is used Contact Digital Input Sensor Input mA Output Communications BUTE GET de cu GT hk EEE EG 21 22 14 13 17 11 12 18 16 15 Y 63 66 65 62 61 95 94 93 92 91 Shield SCREEN mA2 mA1 TL TL SCREEN SCREEN 23 emp 99 SCREEN 2 CONT Wiring polarographic sensor mA OUTPUT F0311 ai Figure 3 14
4. mA output tolerance 0 02 mA of Suffix Option m 0 4 20 mA MON MS Description Digital display tolerance 1 digit Boa d unt mau Dissolved Oxygen PE Converter C Response time Tyee eases hara 0 90 10 s Power Supply 1 115V 15 AC 50 60 Hz Voltage s EM 230V 15 AC 50 60 Hz D Ambient operating temperature Ee NER 100V pe AC 50 60 Hz 10 to 55 C 14 to 131 F Language J Japanese E Storage temperature LE ln English 30 to 70 C 22 to 158 F i Options ve i Mounting Hardware Pipe wall mounting F Humidity 10 to 90 RH non condensing bracket Stainless steel PM Panel mounting bracket G Housing Stainless steel Case Cast aluminium with chemically Mood 2418 Hood for sun pretestibn istant coatin Carbon steel resis ant co g i H4 Hood for sun protection Cover flexible polycarbonate window Stainless steel Case color off white munsell 2 5Y8 4 1 2 Tag Plate SCT Stainless steel tag plate Cover color moss green munsell Conduit Adaptor ds HM 0 6GY3 1 2 0 VELA Coatin Epoxy baked finish 1 Cable entry via six Pg13 5 nylon glands ER Ens dd Cable terminals for up to 2 5 mm finished wires 1 The housing is coated with epoxy resin Protection weather resistant to IP65 standards Mounting Pipe wall or panel using optional bracket H Data protection Non volatile memory for configuration and logbook an
5. FUNCTION SETTING DEFAULTS USER SETTINGS User Interface 50 RET 1 on 51 MODE 0 0 0 all off 52 PASS 0 0 0 all off 53 Err 01 1 hard fail Err 02 1 hard fail Err 03 1 hard fail Err 04 1 hard fail Err 07 1 hard fail Err 08 1 hard fail Err 09 1 hard fail Err 12 1 hard fail Err 16 0 soft fail Err 22 0 soft fail SOFT 0 LCD fail 54 E12 150 55 CALL M 0 Off 56 UNIT 0 mg l Communication 60 COMM 0 1 off write prot SET 3 1 9600 0dd ADDR 00 00 61 HOUR 62 ERASE General 70 LOAD Test and setup mode 80 TEST IM 12J05D02 01E 10 4 Appendix Error codes Code Error description Possible cause Suggested remedy El Response time failure Calibration failed to Temperature unstable Avoid draughts and reach stability in 1 hour direct sunshine E2 Zero calibration out of limits Zero calibration not properly performed Repeat carefully Check limits 0 5 yA 5 0nA E3 Slope calibration out of limits Calibration not properly performed Repeat carefully Check limits 40 to 200 Wrong membrane thickness set Check code 01 E4 Membrane failure Perforated membrane Replace and recalibrate E7 Temperature too high Process temperature too high Check process gt 50 C 122 F Wrong sensor programmed Check model code sensor Incorrect wiring Check connections and cable E8 Temperature too low Process temperature too
6. KRANGE _ NO NY ED E gt X MET XH ii YES NO zum 7 YES NO NO HOLD deactivated return to commissioning menu MOV LU YES NO I MM YES WI SH XH LIIN YES Vv Vv gt XMERY XH I STE TS NO HOLD active last measured value IM 12J05D02 01E Parameter setting 5 11 When using wash and activate HOLD for maintenance wash should be OFF in the commissioning mode section 5 2 4 After that wash should be ON again for returning to measurement mode Note HOLD will be non activated at automatic wash cycle timing when wash is ON in the commissioning mode section 5 2 4 HOLD values set return to commissioning menu gt X ITIL TI ves vo PIU U gt Set HOLD fixed value for mA2 Set HOLD fixed value for mA1 IM 12J05D02 01E 5 12 Parameter setting 5 2 4 Wash NOTE The menu item WASH will not appear unless selected in Service Code 42 MEASURE SETPOINTS SET HOLD WASH SERVI
7. Temperature Indication Check Following Section 3 4 press the ENT key until the message display shows PT1000 In this state change the resistance of the decade resistance box as shown in Table 3 and check the data display The value on the data display must be within the range shown in Table 3 QIS 12J05D02 01E IM 12J05D02 01E Appendix 2 11 3 3 6 3 4 Table 3 Temperature C Resistance Q Data Display C 5 1019 5 5 0 3 25 1097 3 25 0 3 45 1174 7 45 0 3 Input Current Indication Check Following Section 3 5 press the ENT key until the message display shows GALVA1 Turn SW1 on Change the current of the standard current generator and check the data display The value on the data display must be within the range shown in Table 4 Table 4 Reference pA Data Display uA 0 0 0 05 8 8 0 05 16 16 0 05 Press the ENT key until the message display shows GALVA2 Change the current of the standard current generator and check the data display The value on the data display must be within the range shown in Table 5 Table 5 Reference pA Data Display uA 10 10 0 1 30 30 0 2 50 50 0 2 Turn SW1 off Press the ENT key until the message display shows POLAR1 Change the current of the standard current generator and check the data display The value on the data display must be within the range sho
8. oO gt ja 5 1 97 Y Nominal 50A O D 60 5mm mounting pipe 2 inch Example of bracket used for wall mounting 13 0 51 224 8 82 200 7 87 L TO 2 76 100 3 94 10mm dia 3 holes 0 39 Figure 3 3 Wall and pipe mounting diagram Option Code U IM 12J05D02 01E 3 2 Wiring 3 2 1 Wiring of DO30G DO402G Output signal 4 to 20mA DC or 0 to 20mA DC Output signal 4 to 20mA DC or 0 to 20mA DC Contact input cleaning start command WTB10 Terminal box 4 Installation and wiring 3 3 Power supply Contact output S1 High and low alarms or HOLD Contact output S2 Contact output S3 cleaning HOLD or high and low alarms Contact output S4 FAIL failure or high and low alarms Grounding terminal M4 screw 2 Protective grounding 1000 or less 2 Be sure to ground the DO converter case grounding terminal grounding resistance of 1000 or less ro 13 Lio 11 Lo 12 0 15 15 RE Lo 16 16 Liquid earth 6 Note External wiring connection terminal size is for 2 pin 1 Always use a shielded cable with an OD of 6 to 12 mm Ds 3 Always use a cable with an OD of 6 to 12 mm 4 Terminal box is used only where DO converter is installed long distance from DO sensor ordinary not needed 5 This cable is specified in the Basic Code for the WTB10 6
9. IM 12J05D02 01E Parameter setting 5 5 5 2 Commissioning mode In order to obtain peak performance from the EXA converter you must set it up for each custom applica tion Refer to section 1 4 for standard configurations and options SETP RANGE HOLD WASH SERV Alarms are set by default S1 high process alarm 82 low process alarm S3 WASH S4 FAIL The setpoints are at arbitrary default value Therefore you must set these to meaningful values or set them to off See service codes 40 to 49 and user interface codes 50 to 59 mA output 1 is set as default to 0 20 mg l mA output 2 is set as default to 0 50 C For enhanced resolution in more stable measuring processes it may be desir able to select O 5 mg l range for example and maybe 0 25 C temperature range Service codes 30 to 39 can be used to choose other output parameters on mA output 2 The EXA converter has the ability to hold the output during maintenance peri ods This parameter should be set up to hold the last measured value or a fixed value to suit the process The EXA can be set up to control a wash cleaner When using this function the timings must be configured for interval wash and recovery periods This selection provides access to the service menu What follows are pictorial descriptions of typical frontplate pushbutton sequences for each parameter set ting function By following the simple YES NO prompts and arr
10. SUSUMU 2 YOKOGAWA 4 Yokogawa Electric Corporation 10 11 12 13 14 15 16 Model DO402G Style S3 EXA DD Dissolved Oxygen Converter Part No Qty Description K9664CL 1 Cover Assembly K9215DB 1 Hingepin K9663MC 1 Flat Cable K9664BU 1 Digital Assembly Analog Assembly K9664HA 1 For 100 VAC K9664HB 1 For 115 VAC K9664HC 1 For 230 V AC Housing K9672DA 1 Polyuretane baked finish K9672DB 1 Epoxy baked finish K9663MM 1 Cable Gland Assembly Fuse Time Lag Fuse A1105EF 1 For 100 V AC Power 0 200 A T A1105EF 1 For 115 V AC Power 0 200 A T A1103EF 1 For 230 V AC Power 0 100 A T A1565EF 1 Fuse Holder K9672BJ 1 Bracket Assembly K9664DH 1 Stainless steel screw assembly to fix cover K9664DK 1 Screw Assembly Bracket Assembly for Analog Board K9664CH 1 For 100 V AC K9664CJ 1 For 115 VAC K9664CK 1 For 230 V AC K9664AR 1 Bracket Assembly for Digital Board Adapter Assembly K9171SU 1 For G1 2 screw when AFTG specified K9316AF 1 For 1 2NPT screw when ANSI specified Do not exchange these parts Call service personnel All Rights Reserved Copyright O 2007 Yokogawa Electric Corporation Subject to change without notice CMPL 12J05D02 03E 1st Edition Mar 2007 YK 2nd Edition Sep 2012 YK Pipe Wall Mounting Hardware Option Code U Sun Protection Cover Option Code H3 H4 Panel Mounting Hardware Option Code
11. Set 60 nA for the DO70G optical dissolved oxygen sensor IM 12J05D02 01E 5 16 Parameter setting 5 3 2 Temperature functions Code 10 T SENS Code 11 T UNIT Code 12 T ADJ Code 13 T MAN Select temperature sensor to suit the measuring probe Refer to instructions with DO sensor for which temperature sensor is used Select C or F for temperature display Adjust offset in temperature measurement when the sensor is at a stable known value Enable and set manual temperature compensation After the manual temperature set menu has been displayed enter temperature signals and press the ENT key to set If the manual temperature compensation is enabled the temperature set menu is displayed in maintenance mode The maximum and minimum slope values that may be entered depend on the nominal current from serv ice code 01 Example When nominal current 3 75 yA the maximum and minimum slope calibration values that may be entered are Maximum 3 75 x 2 7 5 pA Minimum 3 75 x 0 4 1 5 pA 5 3 3 Calibration functions Code 20 AT SEC Amg Code 21 0 CAL Code 22 ZERO SLOPE IM 12J05D02 01E Set stability parameters for calibration A greater time and or a smaller step gives greater stability before a calibration can be accepted Use caution however to avoid very long calibration times In the DO30G sensor or other galvanic sensors and polarographic sensors the zero point fluctuates less than th
12. User s EXA Manual Model DO402G Style S3 Dissolved Oxygen Converter IM 12J05D02 01E vigilantplant YOKOGAWA 9 IM 12J05D02 01E 8th Edition Yokogawa Electric Corporation PREFACE N WARNING Electric discharge The EXA analyzer contains devices that can be damaged by electrostatic discharge When servicing this equipment please observe proper procedures to prevent such damage Replacement components should be shipped in conductive packaging Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge Installation and wiring The EXA analyzer should only be used with equipment that meets the relevant IEC American or Canadian standards Yokogawa accepts no responsibility for the misuse of this unit AN CAUTION The Instrument is packed carefully with shock absorbing materials nevertheless the instrument may be damaged or broken if subjected to strong shock such as if the instrument is dropped Handle with care Although the instrument has a weatherproof construction the transmitter can be harmed if it becomes submerged in water or becomes excessively wet Do not use an abrasive or solvent in cleaning the instrument Notice 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
13. the YES key Ifthe YES key is pressed without waiting the indicator may show a minus reading dur ing measurement In an aerobic tank with high dissolved oxygen concentrations a zero calibration is not required if a zero check is performed because the indicating error is so insignificant that it does not affect the measurement results There will be no problem if the electrodes are immersed in a zero solu tion for about 10 minutes and the indication falls below 1 mg l However it is recommended to wait for about 60 minutes before performing a zero calibration when a new sensor is installed when the mem brane is replaced or in a place where dissolved oxygen concentrations are low such as in an anaerobic tank If the solubility does not fall below 1 mg l even after waiting for about 10 minutes remove the sen sor and clean it and replace the membrane and or replace the electrolyte solution Calibration may take longer than 10 minutes Before starting the calibration procedure check the setting of Auto Return RET in Service Code 50 It is recommended to set the Auto Return to 0 No return to meas from HOLD After the calibration procedure has been completed set the Auto Return to the desired setting in Service Code 50 IM 12J05D02 01E Calibration 6 5 6 3 3 Procedure for Water calibration XADO HO gt If X X 1 is selected in Service Code 51 the M PR ON message will appear to indicate tha
14. 8 118 11 4 110 10 6 10 3 9 9 9 6 6 10 29 12 48 10 11 3 109 10 5 10 2 9 8 9 5 9 2 8 9 84 11 87 12 10 8 10 4 10 1 9 7 9 4 9 1 8 8 10 9 43 11 33 14 10 3 9 9 9 6 9 3 9 0 8 7 8 3 12 9 05 10 83 16 9 9 9 5 9 2 8 9 8 6 8 3 8 0 14 8 69 10 37 18 9 5 9 2 8 9 8 6 8 3 8 0 7 7 16 8 37 9 95 20 9 1 8 8 8 5 8 2 7 9 7 7 7 4 18 8 06 9 54 22 8 7 8 4 8 1 7 8 7 6 7 3 7 1 20 7 77 9 17 24 8 4 8 1 78 7 6 7 3 7 1 6 8 22 1 48 8 83 26 8 1 78 7 6 7 3 7 0 6 8 6 6 24 7 21 8 53 28 7 8 7 5 7 3 7 0 6 8 6 6 6 3 26 6 93 8 22 30 7 5 7 2 7 0 6 8 6 5 6 3 6 1 28 6 67 7 92 32 7 3 7 1 6 8 6 6 6 4 6 1 5 9 30 6 41 7 63 34 7 1 6 9 6 6 6 4 6 2 6 0 5 8 36 6 8 6 6 6 3 6 1 5 9 5 7 5 5 38 6 6 6 4 6 2 5 9 5 7 5 6 5 4 40 6 4 6 2 6 0 5 8 5 6 5 4 5 2 IM 12J05D02 01E Maintenance 7 1 7 MAINTENANCE It is important for maintaining the measurement accuracy of the EXA DO series of wire dissolvedoxygen metering system to perform inspection and maintenance at fixed intervals It also serves to prevent prob lems from arising This chapter describes daily inspection and maintenance for the purpose of maintaining system perform ance 7 1 Overall dissolved oxygen metering system Tables 7 1 and 7 2 show the inspection and maintenance items for equipment composing 4 wire dis solved oxygen metering system The procedure of inspection and maintenance for the dissolved oxygen converter is described in Section 7 2 For inspection and maintenance of the sensors an
15. 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 AIR CAL Calibration in air preferred method 6 level 1 H20 CAL Calibration in aerated water 6 MAN CAL Process calibration based on grab sample 6 DISP Read auxiliary data and set message display 4 HOLD Switch HOLD on off 5 SETP Adjust alarm setpoints 5 WASH Start wash cycle manually 5 M TEMP Adjust manual temp 5 M PRESS Adjust manual press 5 Commissioning SETP Adjust alarm setpoints 5 level 2 RANGE Adjust output range s 5 HOLD Activate HOLD function 5 WASH Activate and configure the wash timer 5 Service SERV Configure the specialized functions of the converter 5 level 3 Only possible if activated 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 12J05D02 01E 4 2 Operation Output hold flag Manual temperature Fail flag compensation flag Menu pointer flags Main display MODE dl l1 HH Commissioning J function menu Nan Message displa
16. Wiring polarographic sensor 3 10 Wiring RS485 signal It is necessary to use screening shielding on the output signal cables Screw M3 99 is used to connect the shielding IM 12J05D02 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 instruction manual Figure 4 1 shows the EXA operator interface LEVEL 1 Maintenance These functions are accessible by pushbutton through a flexible front cover window The functions make up the normal day to day operations that an operator may be required to complete Adjustment of the display and routine calibration are among the features accessible in this way See table 4 1 LEVEL 2 Commissioning A second menu is exposed when the EXA front cover is removed and the display board is revealed Users gain access to this menu by pressing the button marked in the lower right of the display board This menu is used to set such values as the output ranges and hold and wash features It also gives access to the service menu See table 4 1 LEVEL 3 Service For more advanced configuration selections press the button marked then press NO repeatedly until you reach SERV Now push the YES button
17. o Polarographic I CELL Sensor output 3 75 pA for 50 micron type Galvanic 7 50 pA for 25 micron type User defined LCELL Sensor output 50 nA Polarographic User defined CHECK Sensor check Zero check disabled Zero check enabled 3 0 0 gt oj gt Slope check disabled Slope check enabled Membrane check disabled only for Galvanic Membrane check enabled only for Galvanic ZERO Maximum permissible 0 to 19 99 yA for Galvanic Zero offset 0 to 199 9 nA for Polarographic SL MIN Minimum calibrated slope 0 to 99 9 SL MAX Maximum calibrated slope 100 to 400 NOT USED NOT USED SAL TY Salinity comp 2 Compensation disabled Compensation enabled CL NaCl conc Concentration in g kg water Valid when code range 0 1 to 99 9 g kg 04 is 1 Not used T0502 EPS 1 Membrane check can be enabled when galvanic sensor is selected and cannot be used unless the floating ball holder PB350G or PB360G is used 2 The instrument will not perform salinity compensation simply by setting the salinity compensation to 1 enabled in Code 04 but requires the NaCl concentration For measurement in consideration of the salinity of a sample first manually calibrate with values corrected for salinity and enter the NaCl concentration in Code 04 See Section 6 4 Calibration method using manual calibration method 3
18. 2 Calibration 6 1 2 Diagnostic functions performed during calibration The calibration is a semi automatic calibration which means that the sensor output is used for calcula tion of sensor parameters after the readings have stabilized The criteria for stabilization are set in serv ice code 20 If stable readings are not achieved within one hour error E1 message will appear on the display and the procedure is aborted The calculated sensor parameters are compared with preset toler ances and if these conditions are not met Error E2 Zero Error or E3 Slope Error will be signalled Notes 1 Error messages that appear initially indicate inadequate settings of the diagnostic variables in service codes 01 20 and or 22 2 Patience improves the accuracy of calibration When the EXA prompts the user that the preset criteria are met by showing CAL END message it only means that the minimum criteria are met When the signal still changes after this initial acceptance EXA will automatically update the sensor characteristics with the new information 6 2 Calibration procedure using air calibration method 6 2 1 Preparation Move the sensor to a maintenance site and wash off any dirt on the membrane Lightly wipe off any remaining water from the membrane with a soft tissue Expose the sensor to the air in an environment where there is no temperature change and no wind A convenient way to accomplish this environment is to place the sensor in an
19. 32 Code 33 Code 34 Code 35 36 Code 37 Code 38 mA OUTP F D R BURN RGMA2 tImA2 TABL1 TABL2 DAMP SWTCH IM 12J05D02 01E Select 0 20 mA or 4 20 mA for each of the mA outputs Select the parameter to be transmitted on each of the mA outputs Select the control action when PI selected on mA2 Direct action gives an increasing output with an increase in measured value Select burn out signalling of diagnosed failures Set proportional band for PI control on mA2 Set integral time for PI control on mA2 Set up output linearization tables when selected in code 31 Set damping time to smooth out erratic process fluctuations After enabling range 1B the user can set this range in commissioning mode By pressing the external button with range 1B enabled range 1B will be used instead of the normal range 1 until this button is not pressed anymore Parameter setting 5 19 Code Display Function Function detail Default values mA Output Functions 30 mA mA output Output 1 is 0 20 mA Output 1 is 4 20 mA Output 2 is 0 20 mA Output 2 is 4 20 mA 1 1 31 OUTP F Output function D R Control action Process value on mA1 Table on mA1 Process value on mA2 Table on mA2 Temperature on mA2 PI control on mA2 0 2 Reverse acting Pl control o Direct acting Pl control 32 BURN Burn out No burn out function
20. DISPLAY Press YES to fix the selected second line of display Note 1 Manual temperature compensation menu The menu can be displayed in maintenance mode This can be done by enabling the function in Service Code 13 Manual temperature compensation menu is displayed and temperature can be entered manually Note 2 Pressure is in bars Default 1 013 bar Setting range 0 500 to 5 000 bar Manual press when enabled in service code 51 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 Air calibration AIR CAL H20 calibration H20 CAL Manual calibration MAN CAL Display DISP Setpoint SETP Wash WASH Hold HOLD Manual temperature M TEMP Manual pressure M PRESS See calibration section 6 See calibration section 6 See calibration section 6 See operation section 4 Select and adjust setpoint when enabled in service menu section 5 service code 51 See section 5 4 for adjustment procedure Manually star
21. PM 10 Item Part No Qty Description 1 K917 1SS 1 Mounting Set U 2 Y9608KU 4 Screw 3 D0117XL A 1 U Bolt Assembly 4 K9171SY 1 Plate 5 K9171SX 1 Bracket 6 K9171ST 1 Mounting Set PM 7 Y9520LU 2 Screw 8 K9171SW 2 Bracket 9 Y9608KU 4 Screw 10 Sun Protection Cover K9664CA 1 Cabon steel H3 K9664CC 1 Stainless steel H4 CMPL 12J05D02 03E 2nd Edition Sep 2012 YK Revision Record Manual Title Manual Number Edition 1st 2nd 3rd 4th 5th eth 7th 8th Date Apr 2003 Feb 2004 Sep 2006 Mar 2007 Jul 2007 Oct 2007 Feb 2012 Feb 2014 Model DO402G Dissolved Oxygen Converter Style S3 IM 12J05D02 01E Remark s Newly published Style changed to S2 On p ii After sales Warranty modified On p 2 3 Operating specifications modified On p 3 2 Housing dimensions of Fig 3 01 modified On p 3 4 Fig 3 04 Wiring Diagram modified On p 6 4 Tips for water calibration added On p 6 6 Some error corrected All over revised Style of DO402G changed to S3 Page 2 2 Addition of CSA certified to item M Safety and EMC conforming standards Page 2 3 Some of G Housing description revised Page 3 3 Addition of CSA certified to Sec 3 2 Wiring Page 3 4 The torque to tighten frontplate screws added Appendix 2 Quality Inspection added PREFACE Addition of How to dispose the batteries Page 2 2 Some revision of M Safety and EMC conforming standard
22. Passcodes can be set on any or all of the access levels to restrict access to the instrument configuration Error message configuration Two different types of failure mode can be set Hard fail gives a steady FAIL flag in the display and a continuous contact closure All the other contacts controls are inhibited except HOLD contacts and a Fail signal is transmitted on the outputs when enabled in code 32 Soft fail gives a flashing FAIL flag in the display and the relay contacts are pulsed The other contacts controls are still functional and the controller continues to work normally 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 An extra choice is added for Errors set to Soft Fail lt can be set to LCD Fail contact current situation or to LCD only Overrange alarm set limit for supersaturation permissible before FAIL alarm is triggered Call for maintenance is a contact 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 Select mg l ppm or saturation as the main unit to suit the application Parameter setting 5 27 Code Display Function Function detail X Z Default values User I
23. RS485 two wire communication software option This can be used to record events like calibration and diagnostic messages and to update configuration of the converter remotely The DO402G accepts inputs from galvanic polarographic and optical sensors Percent saturation mg oxygen l water and ppm DO can be displayed and transmitted Compensation for atmospheric pressure altitude salinity and temperature are included for the best accuracy of measurement Features Simple 3 level operation Display mg l ppm saturation Air calibration or saturated water calibration Chloride concentration compensation can be programmed Automatic temperature compensation Built in barometric air pressure compensation Hold function enables fixed output signal during maintenance Two separate mA output signals Wide flexibility incorporating free programmable range settings selection of output signals and alarm functions Analog output with adjustable damping time Password protection for each programming level Built in wash timer with remote start possibility IP65 weather protection Universal mounting possibilities Sensor diagnostics RS 485 bi directional communication Logbook via RS 485 link PI control on mA and pulsed contact controls Method of operation The EXA DO30 operates on a galvanic cell principle The sensor contains a measuring cell consisting of a silver cathode and a lead anode The voltag
24. a limit This can either be a high or low limit Adjustable parameters Setpoint for the process value Hysteresis of the switching action Delay time of the relay 0 to 200 s PI duty cycle control Fig 1 The contact is used to control the time a solenoid valve is opened The propor tional control is achieved by opening and closing the solenoid valve and varying the ratio of on and off time on off Adjustable parameters Setpoint proportional range and integral time Total period of the pulse period 5 to 100 s PI pulse frequency control Fig 2 The contact is used to control a pulse driven pump The frequency of pulses regulates the pump speed Adjustable parameters Setpoint proportional range amp integral time Maximum pulse frequency 50 to 120 min Wash cleaning of sensors Fig 3 Contact S3 is used to control the wash cycle or as a process alarm Adjustable parameters Cleaning time or washing time tw Recovery time after washing tr Interval time for wash cycle The graph shows a typical response curve during washing The wash and recovery times need to be set to suit the process Fault alarm Contact S4 by default set to function as an alarm indicating that the EXA has found a fault in the measuring loop If the self diagnostics of the EXA indicate a fault or error the FAIL contact will be switched In most cases this will be caused by a malfunction of the measuring loop The FAIL contact
25. accurate partial disconnection or degraded Sensor cable failure insulation and then correct the temperature error again All modes Call for maintenance interval time exceeded Perform maintenance Reset interval RANGE mode Incorrect span Change the maximum or minimum value In the range setting a value which makes in the range so that a span more than the span less than 1 0 mg l or ppm or 10 the permissible value is obtained sat has been set CODE 35 amp 36 Table values make no sense Reprogram At data entry Configuration failure Re enter a value within the permissible A value not within the permissible range range is entered All modes Instrument initialization failure Repair is necessary Contact Yokogawa to request repair All modes EPROM comparison failure Repair if necessary Contact Yokogawa to request repair All modes The time out interval for high or low Take measures depending on the purpose alarm has elapsed to use this function if the function is enabled in CODE 47 Reset the error with the NO key or YES key NOTE It is possible that the error message does not disappear immediately after corrective measures Then turn power off and the turn it back on and check whether the system returns to normal IM 12J05D02 01E Spare parts 9 1 9 SPARE PARTS See Customer Maintenance Parts List IM 12J05D02 01E 10 APPENDIX Appendix 10 1 Adjustable lim
26. be set as a signal current When slope check enabled the maximum as minimum calibrated slope values should be set as of the nominal value For the galvanic sensors a membrane check can be enabled This is an impedance test to ensure that the membrane is intact The membrane check is not available for optical and polarographic sensors so the membrane check cannot be enabled or disabled Set 0 salinity compensation disabled when measuring water not including salinity components Set 1 salinity compensation enabled when manually calibrated to salinity compensation This is intended for accurately displaying saturated concentration when measuring sample water Set 1 salinity compensation enabled and then enter NaCl concentration using CL For this concentration enter salinity concentrations in actual sample water used to figure out salinity compensation values NOTE The instrument will not perform salinity compensation simply by setting the salinity compensation to 1 enabled in Code 04 but requires the NaCl concentration For measurement in consideration of the salinity of a sample first manually calibrate with values corrected for salinity and enter the NaCl concentration in Code 04 See Section 6 4 Calibration method using manual calibration method Parameter setting 5 15 x Default values Code Display Function Function detail Parameter Specific functions 01 S TYPE Sensor type Galvanic
27. by process value Proportional duty cycle Proportional pulse frequency Activation by temperature W N 0O PI control inactive PI control active 43 S4 Contact S4 Contact 4 inactive 4 0 0 Low alarm configuration High alarm configuration Active during HOLD Active during FAIL A O Ni gt O Activation by process value Proportional duty cycle Proportional pulse frequency Activation by temperature W N oO PI control inactive PI control active IM 12J05D02 01E 5 22 Parameter setting Code 44 D TIME P HYST T HYST Code 45 RANGE PER FREQ Code 46 ti CNT Code 47 EXPIR IM 12J05D02 01E The delay time or dead time sets the minimum relay switching time This function can be adjusted to give a good alarm function in a noisy process preventing the relay from chattering or repeatedly switching when the signal is close to the setpoint The hysteresis is the value beyond the setpoint that the measured value must exceed before the control function will start working Proportional range is the value above or below the setpoint that generates full output in proportional control The time period of the overall pulse control cycle one ON and one OFF period The maximum frequency for the pulse frequency control The integral time for the PI control settings When a system is set up to c
28. marked with 14 and must be connected to terminal 14 Note A jumper cable is placed to connect converter terminals 13 and 17 Make sure that connecting the sensor cable to the IE pin or pin 13 or pulling the sensor cable does not cause the jumper cable to come loose Insufficient tightening may cause unstable or false measurements Contact Digital Input Short Sensor Input mA Output Commnucations 21 22 14 13 17 11 12 18 16 15 ye 66 65 62 61 95 94 93 92 91 Shield JE T1 T2 LE RE SCREEN E MULUS u E ma NG TL 4 SCREEN SCREEN 23 99 se 2 CONT z t mA OUTPUT Wirning galvanic Sensor F0309 ai Figure 3 11 Wirning galvanic sensor IM 12J05D02 01E 3 10 Installation and wiring 3 7 Wiring other galvanic sensors Consult the users manual for the color identification of the sensor cable and connect temperature com pensator cathode and anode to the terminals 11 12 13 and 15 as described above Connect the cable shield to 14 if there is one available Sensor diagnostics is normally not possible Note A jumper cable is placed to connect converter terminals 13 and 17 Make sure that connecting the sensor cable to the IE pin or pin 13 or pulling the sensor cable does not cause the jumper cable to come loose Insufficient tightening may cause unstable or false measurements 3 8 Wiring the standard optical sensor DO70G Note
29. on mA1 o Burn low on fail on mA1 Burn high on fail on mA1 N No burn out function on mA2 Burn low on fail on mA2 Burn high on fail on mA2 0 0 33 RGMA2 Prop range Proportional band 0 50 mg l 5 0 mg l 0 300 saturation 34 tlmA2 Integral time Integral time in seconds 10 1999 s 100 s 35 TABL1 Table for mA1 21 point table Process value at 0 5 100 of span none 36 TABL2 Table for mA2 21 point table 0 5 100 none 37 DAMP Output damping damping 0 120 s Os 38 SWTCH Range 1B Disabled Enabled 39 Note Not used To enable wash function set Service Code 38 to 0 Service Code 42 to 4 0 0 and Service Code 51 to 0 1 0 IM 12J05D02 01E 5 20 Parameter setting 5 3 5 Contact outputs Code 40 S1 amp S2 41 42 amp 43 For S3 For S4 IM 12J05D02 01E Process relays can be set for a variety of alarm and control function Digit X sets the type of trigger Off means that the relay is not active Low setpoint means that the relay is triggered by a decreasing measurement High setpoint means that the relay is triggered by an increasing measurement HOLD active means that there is maintenance activity in progress so the measurement is not live There is the extra possibility to set up for a wash controller There is the extra possibility to set up for FAIL i
30. or disable enable or disable enable or disable 0 50 mg l in 10 600 s code 02 code 02 22 code 02 21 22 code 20 Compatibility DO Sensor Temperature sensor Membrane thickness Sensor principle Manual temp comp DO30 Pt1000 50 um 2 mil galvanic disabled DOX8 DO410 Ingold DO70G Pt 100 PB36 22k NTC 25 or 50 um 1 or 2 mil adj slope galvanic or polarographic 1 disable or enable code 01 10 code 10 code 01 code 01 wiring code 13 Special Features Salinity compensation Temperature calibration Zero calibration Sensor washing HOLD during maintenance Contact during HOLD Atm press compensation Soft fail alarm Logbook disabled none disabled disabled disabled disabled active disabled disabled comp for 0 100 ppt NaCl adjustment 7 5 C disable or enable interval lt 36 hours wash time 0 1 10 min hold last or hold fix possible on 51 52 S3 or S4 active or manual possible for E1 E4 E7 E9 E12 E16 E22 2 volumes of 50 events 1 Choose a polarographic sensor for an optical dissolved oxygen sensor code 04 code 12 code 21 Wash Hold code 40 42 code 53 code 61 62 IM 12J05D02 01E 1 6 Introduction 1 5 System Configuration Dissolved Oxygen Sensor Holders Holders with Cleaning System Dissolved Oxygen Converter gt DO70G Guide Pipe Floating Ball Holder DO402G Output Signal PH8HG PB350G PB360G H to 2 ma or
31. sscodes codo peter tt 4 3 4 4 Display functions default cccccccccccccnnnnnnnnnnnncnnnnnnnncnnnncnnnnnnnnnnnnnnnnnnnnnn 4 4 5 Parameter setting SR 5 1 5 1 Maintenance mode rrrnnnnnvvnnnrvvvnnnnnvnnnnnnnnnnnnnnssvvnsrvnennnnnennnnnnnnnnnnnssessssseveeeen 5 1 5 1 1 Manual activation of Hold enne 5 2 IM 12J05D02 01E 8th Edition Feb 2014 YK All Rights Reserved Copyright O 2003 Yokogawa Electric Corporation IM 12J05D02 01E 5 1 2 Manual Wash start StOP ooonccinnccncccncccnnnccccnononanononcnnnnnnnnnnnnnnnnnn emere nennen nennen 5 3 5 1 3 Setpoint adj stiment it ee ee nern 5 4 5 2 COMMISSIONING mode lt a A a een 5 5 5 271 ene Nene 5 6 922 2 Range O 5 8 572 93 pr aske as O 5 10 EDAD AA A Red 5 12 seria UM eee reed neuere 5 13 5 3 Notes for guidance in the use of service coded settings 5 14 5 3 1 Parameter specific functions 4444444444sHnnennnnnnnnennennnnennennnnnnnnenn nenn nnnnennnnnnnnen 5 14 5 3 2 Temperature functions u44444444444404nnennennnnnnnnnnennnnnnnnnnnnnnnnnnnn nenne naaa Kanan naaa 5 16 5 3 3 Galibration f nctlons roc Irt rh ni ede tdi 5 16 5 3 4 MA output settings critica ee 5 18 5 3 5 Contact outputs 5 ti ete este 5 20 53 6 User interface EDER 5 26 5 3 7 Communication setup nennen nn A A aka 5 28 SESS UMEI TI ILL 5 28 5 3 9 Test and setup mode esi id tete ete erste ed 5
32. 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 f the product is not used in a manner specified in this manual the safety of this product may be impaired Yokogawa is not responsible for damage to the instrument poor performance of the instrument or losses resulting from such if the problems are caused by Improper operation by the user Use of the instrument in improper applications Use of the instrument in an improper environment or improper utility program Repair or modification of the related instrument by an engineer not authorized by Yokogawa Safety and Modification Precautions Follow the safety precautions in this manual when using the product to ensure protection and safety of the human body the product and the system containing the product The following safety symbols are used on the product as well as in this manual A DANGER This symbol indicates that a
33. 2 11 1 11 APPENDIX 2 QUALITY INSPECTION Quality DO402G Inspection Dissolved Oxygen Converter Standards 1 Scope This inspection standard applies to the DO402G Dissolved Oxygen Converter 2 Inspection Items 2 1 Insulation resistance test 2 2 Dielectric strength test 2 3 Current output test 2 4 Contact operation test 2 5 Temperature indication check 2 6 Input current indication check 2 7 Atmospheric pressure indication check Note Items marked with an asterisk may only be confirmed by a test certificate 3 Inspection Methods Standards and Conditions e Connect the testing circuit as shown in Figure 1 Allow the instrument to warm up for at least 5 minutes before conducting the tests For the connections for the insulation resistance test follow the instructions in Sections 3 1 and for the dielectric strength test follow the instructions in Section 3 2 e Performance tests should be done in the inspection mode where the tests from Section 3 3 through Section 3 7 take place in sequence and cannot be retraced If the reconfirmation of a test is needed turn off the power to the converter turn on the power again and enter the inspection mode to restart the tests 3 1 Insulation Resistance Test Apply 500 V DC between the power supply terminals shorted together 1 and 2 and the protective earth terminal outside of the case The insulation resistance must be 100 MO or greater 3 2 Dielectric Strength Test Ap
34. 28 6 CALIBRATION PROCEDURE rannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnr 6 1 BL CI II Rr Rn EE C 6 1 6 1 1 Calibration methods ict etit tada 6 1 6 1 2 Diagnostic functions performed during calibration aaa 6 2 6 2 Calibration procedure using air calibration method ssssse 6 2 0 2 1 Preparation kenne oett oen DR RR RR CR 6 2 6 2 2 Procedure for air calibratiO ng AI tan aan Band AA Mantan han AA adha AN An a eaaa 6 3 6 3 Calibration procedure using water calibration method 6 4 0 321 O 6 4 6 3 2 Calibration operation water calibration method 6 4 6 3 3 Procedure for Water calibration eene 6 5 6 4 Calibration method using manual calibration method 6 6 0 4 T Preparation iet a e Dee tinte un 6 6 6 4 2 Procedure for manual calibration sssssssssssssseeeeeen eene 6 7 Maintenance oiu an aru ESSE ae sik 7 1 7 1 Overall dissolved oxygen Metering system ea 7 1 7 1 1 Inspection and maintenance to be implemented periodically 7 1 7 1 2 Inspection and maintenance to be implemented on OCCASION men 7 1 7 2 Periodic maintenance for the EXA DO402G converter ssusssss 7 2 7 3 Fuse Replacement Az A En Cu DR ees 7 2 8 Troublesho
35. 5D02 01E 6 4 Calibration 6 3 Calibration procedure using water calibration method 6 3 1 Preparation Move the sensor to a maintenance site and wash off any dirt on the membrane Lightly wipe off any remaining water from the membrane with a soft tissue Prepare the necessary equipment and reagents to be used for the span and if required zero calibration Equipment for span calibration includes beaker or bucket magnetic stirrer or other means of agitating the water Demineralized water or salty process water if salinity compensation is activated Air supply pump aquarium pump Glass diffuser to generate small air bubbles NOTE It takes 15 to 30 minutes of aeration before it can be assumed that the water is fully saturated with air Reagent for zero calibration Sodium sulfite demineralized water The zero oxygen solution contains approximately 50 grams of sodium sulfite per liter 6 3 2 Calibration operation water calibration method If both zero and span calibration are used it is better to start with span calibration in spite of normal calibration sequence with analog instrumentation Otherwise the sensor must be rinsed off carefully to prevent ingress of oxygen absorbing sulfite in the aerated water NOTE It takes a long time to calibrate the DO30G sensor or other galvanic sensors and polarographic sensors with sulfite saturated water Even after CAL END is displayed wait 40 to 50 minutes and then press
36. A jumper cable is placed to connect converter terminals 13 and 17 When a standard optical sensor DO70G is to be connected the cable is not used so disconnect it It is recommended to save the jumper cable for future use if may be needed when a galvanic sensor is used The color of the wiring of the sensor cable supports the indication of each terminal Cor of sensor cable Wie Green Greenvetow Clear Rea Brown J Bue pow n m u wv v peu AEREA ESA ee Contact Input Sensor Input mA Output Digital Communications 21 22 14 13 Shield SCREEN 23 17 4 1 m Temp CONT Wiring optical sensor 2 18 6 d 63 66 65 62 61 EU Tar SCREEN mA OUTPUT 95 94 93 92 91 SCREEN 99 SCREEN 2 IM 12J05D02 01E Figure 3 12 Wiring optical sensor F0311 ai Installation and wiring 3 11 DO70G Wiring Diagram Example DO402G DOX10 T N E Detail 1 5
37. CE X IIOL U YES no WI SH A ENT Wash system timings r are set with the gt A and ENT keys in the a NII ves no setpoint menu XRHI DE i min pe ENT _ NO NS NOVO wi SH IM 12J05D02 01E Parameter setting 5 13 5 2 5 Service MEASURE ARCAL SETPONTS For information on how to set cell WASH current see description in Section 1 5 A4 SERVICE Example Service Code 01 Select Sensor Type ri LI for galvanic sensor Nominal cell current at 1 100 Saturation I for polarographic Set using gt A ENT keys With the gt a ENT keys 1 J Ll Lal X XRHNBE NO NY Matar Ian X we ml YES NO IILIL LI gt lt 7 CJ Ey NO ZA FS Sie q C3 Ey CN M IM 12J05D02 01E 5 14 Parameter setting 5 3 Notes for
38. ES 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 IM 12J05D02 01E 4 4 Operation 4 4 Display functions default Display Access MEASURE AIR CAL H2O CAL MAN CAL DISPLAY Cell current See Air calibration YES Chapter 6 Slope AIR CAL IM 12J05D02 01E See H20 Zero calibration calibration when enabled Chapter 6 in service code 51 YES H2O CAL See Manual calibration Software release Chapter 6 number gt Process temperature DISPLAY When enabled in Hold SET HOLD mode Saturation Setpoint adj also when enabled in service code 51 Barometric pressure Wash start in maintenance mode when enabled in service code 51 Current output 1 Manual temp when enabled Current in service code 13 Note 1 output 2 gt
39. IM 12J05D02 01E 6 8 Calibration Table 6 1 Solubility of oxygen mg l in water as a function of temperature amp salinity Temp Solubility of oxygen in water in equilibrium Correction to be substracted for each degree of salinity with air expressed in grams per kilogram of total salts in water 101 325kPa pO ApO C mg l mg l 0 14 62 0 0875 1 14 22 0 0843 2 13 83 0 0818 3 13 46 0 0789 4 13 11 0 0760 5 12 77 0 0739 6 12 45 0 0714 7 12 14 0 0693 8 11 84 0 0671 9 11 56 0 0650 10 11 29 0 0632 11 11 03 0 0614 12 10 78 0 0593 13 10 54 0 0582 14 10 31 0 0561 15 10 08 0 0545 16 9 87 0 0532 17 9 66 0 0514 18 9 47 0 0500 19 9 28 0 0489 20 9 09 0 0475 21 8 91 0 0464 22 8 74 0 0453 23 8 58 0 0443 24 8 42 0 0432 25 8 26 0 0421 26 8 11 0 0407 27 7 97 0 0400 28 7 83 0 0389 29 7 69 0 0382 30 7 56 0 0371 Table 6 2 Solubility of oxygen mg l at various Table 6 3 Solubility of oxygen mg l of sea temperatures and elevations based on sea level water amp fresh water based on sea barometric pressure of level barometric pressure of 760 mm 760 mm Hg Hg Temp Elevation metres above sea level Temp Solubility C 0 300 600 900 1200 1500 1800 Seawater Fresh water 0 146 14 1 13 6 13 2 12 7 12 3 11 8 C mg l mg l 2 13 8 13 3 129 124 120 116 112 0 11 97 14 62 4 13 1 12 7 122 119 114 110 10 6 2 11 36 13 84 6 124 120 116 112 108 10 4 10 1 4 10 82 13 13
40. Liquid earth to detect membrane failure This Connect only when using this function function is available when using PB350G PB360G float type holder Figure 3 4 wiring of DO30G Example 3 2 2 Wiring of DO70G DO402G 1 Output signas 3 4 to 20mA DC or 0 to 20mA DC Power supply Output signal 3 4 to 20mA DC or Al NN 0 to 20mA DC NC Contact NO PEL EN signal 81 High and Low alarms C and HOLD Remote contact input NC Cleaning start _ Contact NO signal S2 White 3 creen Er Green NC Contact signal S3 Cleaning Green Yellow NO HOLD or High and Low alarms c Red NC Contact signal S4 FAIL Failure NO or High and Low alarms DO70G Optical dissolved oxygen sensor 2 Note External wiring connection terminal size is for 2 pin 1 Always use a shielded cable with an OD of 6 to 12 mm 2 Be sure to ground the DO converter case grounding terminal grounding resis 3 Always use a cable with an OD of 6 to 12 mm EN Grounding terminal DOX10 Poewr supply unit M4 screw 3 3 Protective grounding po 1000 or less I in ance of 1000 or less Brown 1 Blue F11 eps Figure 3 5 wiring of DO70G Example IM 12J05D02 01E 3 4 Installation and wiring A DANGER Never apply power to the DO402G converter and other instruments connected to the DO402G converter until all wiring is completed N WARNING Th
41. RTH TERMINAL RESISTANCE OUTSIDE THE CASE 100M Q OR MORE 500V DC m BE SERT 1 2 FRLET ANO REP il 1400V AC 2984 DIELECTRIC BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EARTH TERMINAL STRENGTH OUTSIDE THE CASE 1400V AC 2sec HEJER FRE 0 02 mA ACCURACY 0 02 mA CURRENT OUTPUT amp m Fr Mk GSA KE ee 12 S S 2 20 2 Ea Z amp m INDICATION LED1 LED2 LED3 LED4 OPERATION OF CONTACT FRXTLED LIGHT LED S1 S2 S3 FAIL S4 BERT FAZ 03 ACCURACY 0 3 C TEMPERATURE PT1000 INDICATION EE RESISTANCE REF ACTUAL ERROR 10195 5 100973 25 11747 4 AHENRET GALVA 1 GALVA 2 INPUT CURRENT ARE KS INDICATION 4t A INDICATION 4 A INDICATION WA ames FRE RE zep poz FAE R INPUT CURRENT REF ACCURACY ACTUAL ERROR INPUT CURRENT REF ACCURACY ACTUAL ERROR 0 Ee woi I 8 ses oos IL 30 OZ 16 16 008 SL 5 sow o0oz _ AJER Z amp INDICATION nA RF INDICATION nA nA settyas FANE R agg emu FANE RE INPUT CURRENT REF ACCURACY ACTUAL ERROR INPUT CURRENT REF ACCURACY ACTUAL ERROR po qoso _tow f100 02 so eozoz _30 ri ARERT 900hPa 1100hPa ATMOSPHERIC PRESSURE INDICATION Aft ANE DE DATE AMBIENT TEMP amp HUM RES GE INSPECTOR APPROVED BY QIC 12J05D02 01 YOKOGAWA Ed6 Sep 2013 IM 12J05D02 01E Customer Maintenance Parts List Y
42. able wash time interval time and relaxation time to control the wash cycle The fourth contact is fixed to function as an alarm indicating that the EXA has found a fault in the meas uring loop FAIL safe Cleaning In combination with the appropriate sensor and immersion type fitting the wash timer with remote start possibility can be used Interval time washing time and relaxation time are free programmable Damping time on output signal Under certain circumstances disturbances can cause high peaks in the output signal To avoid these dis turbances the EXA DO402 has an electronic filtering which averages the output signal during a program mable period This damping time is programmable between 0 and 120 seconds Salinity compensation In order to take the effect of salinity into account for oxygen measurement an average chloride concen tration can be programmed The chloride concentration value is set manually via the service level The EXA DO402 takes account of the effects of salinity and temperature simultaneously The advantage of this construction is that the result of the measurement is available immediately A separate conversion table is not necessary Temperature compensation The micro processor makes an accurate temperature compensation possible that performs well over the entire range of the instrument No further adjustment tables are required Barometric air pressure compensation Air pressure differences due to weather co
43. ail Constant 0 0 LCD Fail LCD only 1 54 E12 overrange limit E12 active at 0 300 sat Note 150 55 CALL M E16 setting No call for maintenance 0 0 Call for maint enabled 1 E16 message after 1 250 days 30 56 UNIT PV unit Unit of measurement mg l 0 0 Unit of measurement ppm 1 Unit of measurement sat 2 57 59 Not used Note For setting a value greater than 199 9 move the decimal point For a value greater than 200 decimal places cannot be used IM 12J05D02 01E 5 28 Parameter setting 5 3 7 Communication setup Code 60 COMM The settings should be adjusted to suit the communicating device connected to the RS485 port SET ADDR For the Yokogawa PC402 software package the default settings match the software as shipped 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 8 General Code 70 LOAD The load defaults code allows the instrument to be returned to the default set up with a single operation This can be useful when wanting to change from one application to another 5 3 9 Test and setup mode Code 80 TEST Not used Note Attempting to change data in service code 80 and above without the proper instructions and equip
44. anced communications capability to meet the most advanced requirements The meas urement 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 dos ing 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 main tenance operations A variety of EXA hardware is optionally available to allow wall pipe or panel mounting Selecting a prop er installation site will permit ease of operation Sensors should normally be mounted close to the con verter in order to ensure easy calibration and peak performance If the unit must be mounted remotely from the sensors WF10 extension cable can be used up to a maximum of 50 metres 150 feet with a BA10 junction box The EXA is delivered with a general purpose default setting for programmable items Default settings are listed in Chapter 5 and again in Chapter 10 While this initial configuration allows easy start up the configuration should be adjusted to suit each particular application An example of an adjus
45. ands to be used for cabling Contact Input Sensor Inputs Digital Communications 23 21 22 14 13 17 11 SCREEN Shield CONT ll al 1 2 18 SENSOR mA Outputs T 15 O 63 66 65 62 61 Liquid Ta Ta SCREEN mA OUTPUT 95 94 93 92 91 SCREEN 99 SCREEN 2 RS485 A optical sensor and polarographic sensor galvanic sensor Relay Contacts Power Supply m 5A 250VAC 100VA 250VDC 5A 50W C NC NO S4 71 72 73 51 52 53 41 C NC NO S3 C NC NO 42 43 31 32 33 C NC NO s2 1 A IH oe ZN FUSE 100 VAC 115 VAC 230 VAC 200 mA 200 mA 100 mA 250VAC T Figure 3 8 Input and output connections IM 12J05D02 01E High voltage compartment Installation and wiring 3 7 3 3 3 AC power Connect terminal 1 to the phase line of the AC power and terminal 2 to the zero line The size of conduc tors should be at least 1 25 mm The overall cable diameter should be between 6 8 12 mm 0 24 8 0 47 in 3 3 4 Grounding the housing Ad DANGER Protective grounding must be made to prevent electric shock To protect the instrument against interference the housing should be connected to ground by a large area conductor This cable can be fixed to the rear of the housing using a braided wire cable See figure 3 9 This is separat
46. ania a Man 3 5 3 3 2 Access to terminal and cable entry non ccna non cnn nn 3 6 3 3 3 AC POWER A A eek 3 7 3 3 4 Grounding the housing nel ni 3 7 3 3 5 Switching on the instrument sss eene nennen ern nenn 3 7 3 4 Wiring the contact signals rrrrrnnnnoonnnnnnnnnnnnnnernternternnnnnenennnakenadanavenennnnnnn 3 8 3 4 1 General precautions ne nenen nenen akan kekananan n nne anakan anakan nana nis 3 8 3 4 2 Contact outputs nn mode et de rt bee A Aan eed A LG 3 8 3 4 3 Contact input 14 Aedes A ba o E Uca odes 3 8 3 5 Wiring the analog output signals sess 3 9 3 5 1 General precautions z ussssssesnennnnnnnnnennennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne nenn nnne rte nns 3 9 3 5 2 Analog output signals AA ADA ennemis 3 9 3 6 Wiring the standard galvanic sensor uueeeeeeennennnnnnnnnnnnnnnnnn nenne 3 9 3 7 Wiring other galvanic SeNnSOrS ee errr ena anna nana aaa 3 10 3 8 Wiring the standard optical sensor DO70G mean 3 10 3 9 Wiring polarographic sensorS ee reen naaa nana naaa aaa 3 11 3 10 Wiring RS485 signal O sage 3 11 4 Operation Display Functions And Setting eere 4 1 ACA AA A ELO edu brin AD RES IEEE aerea 4 1 4 2 Explanation of operating keys ssseeeeeee 4 2 4 3 Selling p
47. cks to the tip of the sensor Membrane abnormality Electrolyte degradation Clean the sensor membrane sensor cap and recalibrate If the error is detected again replace the electrolyte and the membrane sensor cap AIR CAL mode H20 CAL mode MAN CAL mode Slope failure The slope exceeds the range of 40 to 200 of the theoretical value Dirt sticks to the tip of the sensor Membrane abnormality Electrolyte degradation Clean the sensor membrane sensor cap and recalibrate If the error is detected again replace the electrolyte and the membrane Check that the connection between sensor and sensor cable is fit and LED emission of the optical dissolved oxygen sensor When error occurred again replace the sensor cap sensor cable or sensor itself Measuring mode Sensor membrane failure Replace membrane Check for wet O rings in the membrane assembly or wet sealing face Wipe off wet areas and dry out All modes Measured temperature failure too high It exceeds 50 0 C 122 0 F Measuring solution temperature is high CODE 10 setting is not correct Sensor cable wiring failure Temperature sensor has failed Examine the temperatures of the measuring solution and sensor and the CODE 10 setting Examine the sensor cable connection status If the temperature sensor fails abnormal resistance replace the sensor All modes All modes IM 12J05D02 01E Measured tem
48. d lithium battery for clock support I Watchdog timer Checks microprocessor J Automatic safeguard Return to measuring mode when no keystroke is made for 10 min IM 12J05D02 01E Installation and wiring 3 1 3 INSTALLATION AND WIRING 3 1 Installation and dimensions 3 1 1 Installation site N WARNING 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 The EXA converter 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 converter In any Case the cable length should not exceed 50 meters 162 feet For an optical dissolved oxygen sen sor the allowable maximum cable length is 10 m 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 converter is not mounted in direct sunlight or severe weather conditions Maintenance procedures are possible avoiding corrosive environments The ambient temperature and humidity of the installation environment must be within the limits of the instrument specifications See chapter 2 3 1 2 Mounting methods Refer to figures 3 2 and 3 3 Note that the EXA converter has universal mounting capabilities Pa
49. d concentration of water According to Table 6 1 the solubility is 8 74 mg l at 22 C and 8 58 mg l at 23 C The solubility at 22 5 C is calculated as follows 8 74 8 58 8 74 x 22 5 22 8 66 mg l 2 Calculating the value corrected for salinity 0 0453 0 0443 0 0453 x 22 5 22 0 0448 mg l 0 0448 x 30 1 34 mg l 3 Calculating the saturated concentration of solution to be calibrated 8 66 1 34 7 32 mg l NOTE When salinity compensation is done salinity compensation must be enabled in Service Code 04 to allow the instrument to show the saturated concentration 96 during sample measurements correctly IM 12J05D02 01E Calibration 6 7 6 4 2 Procedure for manual calibration AT OHO If X X 1 is selected in Service Code 51 the M PR ON message will appear to indicate that manual pressure is enabled Press YES to proceed After briefly displaying WAIT the display returns to the normal readout Select the flashing digit with the gt key Increase its value by pressing the key When the correct value is displayed press ENT to enter the change Press YES to return to the measuring mode Single Point adjustment only
50. d holders see each user s manual respectively 7 1 1 Inspection and maintenance to be implemented periodically Table 7 1 shows the items which are recommended to be inspected and maintained periodically Table 7 1 Items for periodic inspection and maintenance of 4 wire dissolved oxygen metering system Instrument or apparatus Item Recommended Interval All equipment Calibration a 1 to 2 months Dissolved oxygen sensor Clean the tip of the sensor a 1 to 2 months Polishing of silver electrode b 6 to 8 months surface and replacement of electrolyte Replacement of membrane assembly 6 to 8 months Replacement of sensor cap 6 to 12 months Dissolved oxygen converter Inspection of temperature indication 6 months error check Replacement of fuse 1 to 2 years Float holder Sweeping of winch mechanism depends on installation environment Immersion holder Inspection of sensor holding O ring 6 months Sweeping of cleaner nozzle 1 to 2 months Inspection for leakage from the solenoid 6 months valve for cleaning utility 7 1 2 Inspection and maintenance to be implemented on occasion Occasionally implement the maintenance that is not directly related to measurement functions and main tenance associated with errors Table 7 2 Items for occasional inspection and maintenance of 4 wire dissolved oxygen metering Faulty phenomenon System content of inspection Error E2 occurrence Check whether t
51. e dissolved oxygen analyzers in laboratory environment Accurate results can be obtained if the calibration is performed carefully The water calibration may include a zero calibration if so selected in service code 21 Normally only a zero check is performed without calibration since a good sensor has no zero signal Always select 1 in service code 21 for the DO70G optical dissolved oxygen sensor Water calibration is not possible in salt water unless salinity compensation is activated in service code 04 The calibration is done in H20 CAL mode in maintenance level Note In normal industrial environment better results are obtained with air calibration which is therefore the recommended method Manual calibration This is a calibration method whereby the sensor is not exposed to a calibration fluid but is calibrated by comparison with a reference method This reference method is normally a laboratory analysis of the water sample either by iodometric titration according ISO 5813 or an electrochemical method according ISO 5814 The calibration is done in MAN CAL mode in maintenance level Note Calibration must be carried out after changing the manual pressure setting see service code 51 When the manual pressure is enabled air and water calibrations are made based on the specified pres sure M PR ON YES NO is displayed before the calibration to confirm whether the calibration will be made based on the pressure IM 12J05D02 01E 6
52. e gen erated by this electrode pair is sufficient to generate a spontaneous reduction of oxygen at the cathode So no external voltage source for this reaction is required The electrodes are immersed in an electrolyte containing potassium hydroxide Oxygen molecules can pass through a permeable membrane into the cell The output current of the cell is directly related to the partial pressure of oxygen at the sample side In the sensor a thermistor is integrated to be able to correct for temperature changes Both signals are used in the converter to ensure an automatically compensated value for dissolved oxygen Calibration is worked out by simple air calibration to make sure that the performance of the instrument will be main tained The DO70G sensor operates based on the principle of optical fluorescence measurement The sensor comprises a fluorescent membrane light emitting part light receiving part and internal cir cuit An external power source is required Oxygen molecules pass through the permeable membrane to a fluorescent substance and shift the phase of fluorescent emission The degree of this shift is inversely proportional to the partial pressure of oxygen on the sample side resulting in the output of a current equivalent to the polarographic current adjusted by the internal circuit A temperature sensor is integrated in both sensors and the temperature signals are used to automati cally compensate the measurements of dissolved oxyge
53. e span Therefore with the zero check a zero calibration is not required for these sensors provided that they are used in environments with high concentration dissolved oxygen such as aerobic tanks The zero calibration is recommended when installing sensors replacing membranes or performing measurement in anaerobic tanks with low concentration dissolved oxygen The two point calibration zero and span is necessary for the DO70G optical dissolved oxygen sensor because of its operation principle Select 1 to enable zero calibration NOTE The zero point is reset to the default when 0 is set zero calibration disabled even after calibration Zero current values can be entered manually If a zero calibration is made in maintenance mode a zero current value will be automatically reset NOTE A zero current value is displayed only when a zero calibration is enabled in code 21 Slope values can be manually entered with current values If a span calibration is made in maintenance mode slope values will be automatically reset NOTE Slope values can be displayed with current values When span check functions are enabled in code 02 the above current values are converted to values and compared with the set values Slope current sensitive current reference sensitive current Parameter setting 5 17 Code Display Function Function detail x Default values Temperature Measuring Functions 10 T SENS Te
54. ed from input ground by a galvanic isolation Ay CAUTION Please be sure to connect protective grounding of DO402G with cable of 1 25 mm or larger cross section in order to avoid the electrical shock to the operators and maintenance engineers and prevent the influence of external noise And further connect the grounding wire to the mark 1000 or less 3 3 5 Switching on the instrument After all connections are made and checked the power can be switched on from the power sup ply Make sure the LCD display comes on All segments will illuminate then the instrument will momentarily display its unique serial number After a brief interval the display will change to the meas ured value If errors are displayed or a valid meas ured value is not shown consult the troubleshooting section Chapter 8 before calling Yokogawa M4 screw Figure 3 9 Grounding the housing IM 12J05D02 01E 3 8 Installation and wiring 3 4 Wiring the contact signals 3 4 1 General precautions The contact output signals consist of voltage free relay contacts for switching electrical appliances SPDT They can also be used as digital outputs to signal processing equipment such as a controller or PLC It is possible to use multi core cables for the contact in and output signals and shielded multi core cable for the analog signals 3 4 2 Contact outputs The EXA unit s four contact outputs can be wired to s
55. elsius any span within 0 50 mg l ppm saturation 25 C minimum span Fahrenheit range code 56 range code 11 Outputs Analog output Second output Output allocation Contact outputs Contact allocation Contact variables Add contact functions Control functions Digital outputs 4 20 mA for DO 4 20 mA for Temp DO and Temp S1 high at 19 5 mg l S2 low at 1 0 mg l mg l and FAIL dead time 0 2 s hyst 0 1 mg l none none none 0 20 mA or 4 20 mA 0 20 mA or 4 20mA DO Temp Table PI control 4 freely programmable mg l temp wash PI control HOLD time 0 200 s hyst 0 20 mg l time out alarm PI on contacts or mA2 output RS485 code 30 code 30 code 31 setpoint code 40 41 42 43 code 40 43 code 44 code 47 code 45 46 34 33 code 60 Communication Digital interface Communication software Variables on display Burn out Password protection Autoreturn Add functions in MAINT disabled disabled mg l and temp disabled disabled return to measure in 10 minutes disabled RS485 PC402 sat C mA1 mA2 SL ZR REL burn low 3 5 high 22 on mA1 mA2 for mains comm serv level enable or disable wash start setpoint adj code 60 contact factory display code 32 code 52 code 50 code 51 Diagnostics Membrane condition Check on Slope Check on zero Check on stability active active disabled 0 05 mg l per 60 s enable
56. empty bucket Note If sensors are used without temperature compensating element the temperature must be adjusted to ambient temperature in service code 13 Before zero calibration see 6 3 1 Preparation IM 12J05D02 01E Calibration 6 3 6 2 2 Procedure for air calibration Press the MODE key AUT CAL appears in the display and the YES NO key prompt flags flash Press YES XxAno 62 If X X 1 is selected in Service Code 51 the M PR ON message will appear to indicate that the manual pressure is enabled Press YES to proceed 730 w 4 T ETT GI LIVE FIL YES NO T from 2 The instruments waits for the reading to stabilize The display flashes When reading Is stable the CAL END message appears YOKOGAWA 4 Note To start calibration with a zero solution press NO zero calibration must be Press YES for single point activated in service adjustment code 21 After briefly displaying WAIT the display returns to the normal readout Transfer to zero solution and press YES gt I When the reading is stable the CAL END message appears Press YES m YES gt After briefly displaying WAIT the display returns to the normal readout IM 12J0
57. ew recommended or equivalent fuse on the holder 5 Put the fuse cover back on the holder securely 6 Install the high voltage shield plate It is recommended that the fuse be replaced every two years even if it has not blown Fuse Cover TM Fuse Holder Shield Plate Figure 7 1 How to replace the fuse IM 12J05D02 01E Troubleshooting 8 1 8 TROUBLESHOOTING This chapter describes the countermeasures for failures classifying the cases into three categories dissolvedoxygen converter failure detection of failure with the self diagnosis function and abnormal measured values The causes for abnormal measured values are not limited to equipment failures if an abnormal phenomenon occurs first check the following items Is the property of the measuring solution different from normal Is the dissolvedoxygen sensor properly installed 8 1 Measures in the case of converter operation failure 8 1 1 No dissolved oxygen converter operation If the converter does not operate even when the power is supplied one cause may be a blown fuse inside the converter Examine the fuse by turning off the power supply see Subsection 3 3 1 on page 3 5 If the fuse is blown replace it with a new one If fuses frequently blow and the cause is not clear request an inspection by Yokogawa If the fuse is normal examine the wiring system 8 1 2 Operation key or display failure If the operation keys do not operate smoothly or the disp
58. guidance in the use of service coded settings 5 3 1 Parameter specific functions Code 01 S TYPE Select 0 for DO30 sensor or other galvanic sensor Select 1 for SM31 other polarographic sensor and optical dissolved oxygen sensor L CELL After selecting sensortype you need to select the nominal cell current With a galvanic sensor 3 choices are offered Select 0 for DO30 thick 50 um membrane with a default of 3 75 pA Select 1 for DO30 thin 25 um membrane with a default of 7 5 pA Select 9 for user definable This can be set to suit any galvanic sensor With polarographic sensor 2 choices are offered Select 0 for SM31 sensor with a nominal cell current of 50 nA Select 9 for other polarographic sensor with the nominal cell current to be user defined Select 9 for the DO70G sensor and input the nominal cell current of 60 nA General Note Dissolved oxygen sensors fall into two categories galvanic and polarographic Yokogawa offer both types Settings for Yokogawa Sensors Code 02 Code 04 CHECK SAL TY IM 12J05D02 01E DO30 DO30 SM31 DO70G Membrane Thick Thin Sterilizable Fluorescence S TYPE 0 0 1 1 LCELL 0 1 0 9 This code is used to set up appropriate diagnostics In most cases a zero calibration is not used the default check therefore set to off When zero check enabled the maximum permissible zero offset should
59. he dissolved oxygen sensor membrane is contaminated or not Check whether the nozzle is clogged or not Error E3 occurrence Polish the silver electrode surface of the galvanic dissolved oxygen sensor platinum surface of the polarographic dissolved oxygen sensor and replace the electrolyte Check that the connection between sensor and sensor cable is fit and LED emission of the optical dissolved oxygen sensor It is difficult to see the inside Wipe off the dirt on the transparent window using tissue paper or of the converter through the the like Use detergent for hard to clean dirt window IM 12J05D02 01E 7 2 maintenance 7 2 Periodic maintenance for the EXA DO402G converter The DO402G converter requires very little periodic maintenance The housing is sealed to IP65 NEMA 4X standards and remains closed in normal operation Users are required only to make sure the front window is kept clean in order to permit a clear view of the display and allow proper operation of the pushbuttons If the window becomes soiled clean it using a soft damp cloth or soft tissue To deal with more stubborn stains a neutral detergent may be used NOTE Never used harsh chemicals or solvents In the event that the window becomes heavily stained or scratched refer to the parts list Chapter 9 for replacement part numbers When you must open the front cover and or glands make sure that the seals are clean and correctly fit ted whe
60. ion wash cleaning control signal on S3 and FAIL alarm for system and diagnostic errors on S4 PI pulsed PI frequency K Contact input Wash start or input remote range change either choice On resistance 100 or less Off resistance 100kQ or more On time 0 5 sec or more L Power supply Supply voltage rating 100 115 230 VAC Applicable range 85 to 115 97 8 to 132 2 195 5 to 264 5 VAC Supply frequency rating 50 60 Hz Applicable range 50 Hz 5 60 Hz 5 IM 12J05D02 01E Power consumption Maximum 10 VA for steady operation M Safety and EMC conforming standards C O conforms to EN 61010 1 EN 61326 1 Class A Table 2 For use in industrial locations Note 1 EN 61326 2 3 EN 61000 3 2 Class A EN 61000 3 3 EMC Regulatory Arrangement in Australia and New Zealand EN 55011 Class A Group 1 Korea Electromagnetic Conformity Standard Class A Sx AAA NE Safety EMC Installation altitude 2000 m or less Category based on IEC 61010 II Note 2 Pollution degree based on IEC 61010 2 Note 2 Note 1 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 Aw 77 AFS BERAYA o WAS ARAB 274297729 uz xi ABRE e BS PAHA uem 1499 419 914 ABE AS 5403 qu Note 2 Installation category called over voltage category specifies impulse withstand voltage Category II is for electrical equipmen
61. is also closed when the power is removed The FAIL contact may also be configured as a fourth process alarm IM 12J05D02 01E duty cycle control 100 toff gt 0 1 sec Duty cycle ton gt 0 1 sec Proportional DO Duty cycle Setpoint Range of output range Time Figure 1 Duty cycle control controller output 0 35 TJENT Maximum pulse frequency 0 3s gt 50 AE eee eee 50 pulse frequency No pulses lt Proportional gt DO Time Setpoint Range of output range Figure 2 Pulse Frequency control tw tr Wash Recovery 1 Interval Time i Time gt Figure 3 Dynamic response during wash Parameter setting 5 25 IM 12J05D02 01E 5 26 Parameter setting 5 3 6 User interface Code 50 RET Code 51 MODE Code 52 PASS Code 53 Err 04 Code 54 E12 Code 55 CALL M Code 56 UNIT IM 12J05D02 01E When Auto return is enabled the converter reverts to the measuring mode from anywhere in the configuration menus when no button is pressed during the set time interval of 10 minutes The adjustment of the contact setpoints and the manual operation of the wash system can be setup for operation in the maintenance mode Through the closed front cover In maintenance mode the pressure can be entered M PRESS If manual pressure is enabled a warning is given when starting manual water and air calibration
62. is best to read current output during first air calibration in display mode and to enter that value in service code 01 The temperature compensator is a NTC resistance and that can be chosen by entry of 3 in code 10 The wiring of the sensor is different as well The red wire the anode goes to terminal 18 The white wire the cathode goes to terminal 17 The green yellow wire the shield goes to terminal 14 and the 2 black wires for NTC go to terminal 11 and 12 The membrane checking feature cannot be used for these sensors due to the construction of the sensor 1 5 2 The holders a PB30 floating ball holder All Yokogawa sensors are compatible with the floating ball holder that is specified in GS12J6K4 and GS12J5A1 b FD30 immersion fitting The DO30 sensor is compatible with the FD30 immersion holder as specified in GS12J6K4 and with all flow fittings and flow fitting subassemblies that are specified in GS12D7K2 c DOX8HS submersion type holder The DOX8SM and the DO30G sensor are compatible with the DOX8HS holder and all PH8 model holders IM 12J05D02 01E 2 DO402G SPECIFICATIONS 2 1 General A Input specifications The DO402G Dissolved Oxygen converter measures the cur rent that is generated by the Dissolved Oxygen sensor The flexibility of the input circuit allows the use of many com mercially available sensors whether they are of the Galvanic type driving voltage generated internally or Polarographic ty
63. is product complies with the CE marking Where compliance with the CE marking and relevant standard is necessary the following wiring is required 1 Install an external switch or circuit breaker to the power supply of the DO402G converter 2 Use an external switch or circuit breaker rated 5A and conforming to IEC 60947 1 or IEC 60947 3 3 It is recommended that the external switch or circuit breaker be installed in the same room as the DO402G converter 4 The external switch or circuit breaker should be installed within reach of the operator and identified with marking as a power supply switch to the DO402G converter 5 Power lines such as power cables and contact outputs should be fixed securely onto a wall or construction using cable racks conduit tubing nylon bands or other appropriate ways Accidental removal from terminals by pulling may result in electric shock 3 2 3 Preparation The relay contact terminals and power supply connections are under the screening shielding plate These should be connected first Connect the sensor outputs and data communication connections last Follow the procedures below to open the DO402G for wiring Loosen the four frontplate screws and remove the cover Use the rubber knob in the lower right hand corner and swing open the display board to the left The upper terminal strip is now visible Remove the screen shield plate covering the lower terminal strip Connect the power supply and contact outp
64. its and defaults for settings in Commissioning Level 10 1 Setpoint Variable Default Lower limit Upper limit OX1 19 5 mg l 0 0 mg l 50 0 mg l 0 0 ppm 50 0 ppm 0 0 sat 300 sat OX2 1 0 mg l 0 0 mg l 50 0 mg l 0 0 ppm 50 0 ppm 0 0 sat 300 sat OX3 10 0 mg l 0 0 mg l 50 0 mg l 0 0 ppm 50 0 ppm 0 0 sat 300 sat OX4 10 0 mg l 0 0 mg l 50 0 mg l 0 0 ppm 50 0 ppm 0 0 sat 300 sat Sp mA2 10 0 mg l 0 0 mg l 50 0 mg l 0 0 ppm 50 0 ppm 0 0 sat 300 sat T1 25 0 C 77 F 0 0 C 32 F 50 C 122 F T2 25 0 C 77 F 0 0 C 32 F 50 C 122 F T3 25 0 C 77 F 0 0 C 32 F 50 C 122 F T4 25 0 C 77 F 0 0 C 32 F 50 C 122 F 10 2 Range Variable Default Lower limit Upper limit Range 1 0 0 00 0 0 mg l 50 0 mg l Process 100 19 99 0 0 ppm 50 0 ppm 0 0 sat 300 sat Range 2 0 0 00 0 0 mg l 50 0 mg l Process 100 19 99 0 0 ppm 50 0 ppm 0 0 sat 300 sat Temperature 0 0 C 32 F 0 0 C 32 F 50 C 122 F 100 50 C 122 F Note The range has a minimum span of 1 0 mg l 1 0 ppm or 10 sat In case of a temperature output 25 C or 50 F 10 3 Hold Variable Default Lower limit Upper limit mA fix 1 10 00 mA 0 or 4 mA 20 mA mA fix 2 10 00 mA 0 or 4 mA 20 mA 10 4 Wash Variable Default Lower limit Upper limit Interval 6 hours 0 1 hours 36 0 hours Wa
65. justment of the readings to a reference standard Normally this reference is a laboratory measurement that analyses a sample that must be identical to the sample measured with the on line analyzer The following precautions must be taken into account The sample must be analyzed directly after sampling to avoid change of dissolved oxygen concentration or temperature after sampling The reference standard must be analyzed with a laboratory meter that is calibrated prior to sample analysis The reference method must be calibrated with the same calibration data as specified in ISO 5814 to avoid in discrepancies Most important calibration data are Dissolved oxygen concentration at saturation conditions as function of temperature barometric pres sure altitude and salinity These data are included in this manual for reference and verification of correct calibration of refer ence analyzers DO402G has taken all these variables into account during the semi automatic cali bration methods c Compensating the salinity of a sample Example of procedure for salinity compensation calibration When performed in consideration of the salinity calibration should be done manually The following shows a procedure for salinity compensation Perform the calibration referring to Table 6 1 Assuming that the atmosphere is 1 atm the solution temperature is 22 5 C and the salinity is 30 g kg 3 wt seawater equivalent 1 Calculating the saturate
66. lay fails e g a missing character segment repair of the printed circuit board digital board replacement with a new one is required After the printed circuit board is replaced operation checks and parameter settings are necessary Contact Yokogawa and request board replacement work IM 12J05D02 01E 8 2 Troubleshooting 8 2 Measures in the case of failure Error detection If a failure is detected through the self diagnosis of the DO402G dissolved oxygen converter the FAIL contact is closed The FAIL lamp on the operation panel lights up and an error number appears in the data display Note If an error is detected during configuration the FAIL contact signal is output immediately but the error number is displayed after that action or operation is completed When a FAIL contact signal is output take measures according to Table 8 1 Table 8 1 Generation Mode AIR CAL mode H20 CAL mode Countermeasures in the case of failure Error detection Error Content and Causes Stability failure Even after an hour has elapsed the measured value change does not decrease within the set value of mg l Sensor temperature changes Dissolved oxygen of the calibration solution changes The value of A mg l is not suitable Countermeasures Eliminate the causes and press the NO key to perform re calibration H20 CAL mode Zero point error failure The zero point error exceeds the set range Dirt sti
67. low Check process lt 0 C 32 F Wrong sensor programmed Check model code sensor Incorrect wiring Check connections and cable E9 Cell current abnormal Sensor fault Check membrane Galvanic outside 10 to 50 pA Programming fault Check setup Polarographic outside 100 to 500 nA E10 EEPROM write failure Fault in electronics Try again if unsuccessful contact Yokogawa E12 Abnormal measured value Wrong DO sensor or temperaure Check code 01 02 10 The dissolved oxygen value sat sensor programmed 12 and 54 exceeds 150 or value set in Code 54 Incorrect wiring Accurately perform calibration E15 Cable resistance influence to temperature Cable resistance too high Check cable exceeds 7 5 C 13 5 F Corroded contacts Clean and reterminate Wrong sensor programmed Reprogram E16 Call for maintenance inetrval time System not maintained in Perfrom maintenance exceeded preset time period Reset interval E17 Output span too small Incorrect configuration by user Reprogram E18 Table values make no sense Wrong data programmed Reprogram E19 Programmed values outside acceptable limits Incorrect configuration by user Reprogram E20 All programmed data lost Fault in electronics Contact Yokogawa Very severe interference E21 Checksum error Software problem Contact Yokogawa E22 Alarm activation time exceeded Process control not effective Check control equipment within set time Adjust value in code 47 IM 12J05D02 01E Appendix
68. mbrane 1 mil This sensor has a nominal output current of 7 5uA in ambient air under reference conditions In Service code 01 selection 1 must be programmed when this sensor is used The membrane check is inactive with this sensor unless external solution ground is used metal holder or sample line c Model DO30G sensor This sensor is essentially the same as the DOX8SM sensor but it has a 50 micron membrane fixed sensor cable Pt1000 RTD temperature compensation and integral solution ground that allows membrane checking The nominal output of this sensor is 3 75 pA in air under reference conditions In Service item CELL selection O must be programmed when this sensor is used For details refer to G512J05D03 01E d Model DO30 sensor This sensor is specified in GS12J6K4 and it can be supplied with 50 or with 25 micron membrane Normally 50 micron membrane is used and no reprogramming is necessary Otherwise Service code 01 setting must be changed from 0 to 1 IM 12J05D02 01E Introduction 1 7 e Ingold model 32 sensors with 12 19 and 25 mm shaft These sensors are available in many different configurations The sensor is a polarographic sensor and therefore settings of service code 01 has to be changed from 0 to 1 The sensor output is normally between 30 and 100 nA in ambient air under reference conditions but the large cathode version has a current output between 200 and 700 nA To utilize Slope diagnostic features it
69. ment can result in corruption of the instrument setup and will impair the performance of the unit IM 12J05D02 01E Parameter setting 5 29 Code Display Function Function detail X Y Z Default values Communication 60 COMM Communication Set communication Off 0 0 1 Off Set communication On Communication write enable 0 write Communication write protect 1 protect SET Baud rate 8 parity Baud rate 1200 0 3 1 2400 1 4800 2 9600 3 9600 Parity Off 0 Odd 1 Odd Even 2 ADDR Network address Set address 00 to 15 00 61 HOUR Clock setup Adjust to current date and time using MINUT gt and ENT keys SECND YEAR MONTH DAY 62 ERASE Erase logbook Press YES to clear logbook data 63 69 Not used Code Display Function Function detail X Y Z Default values General 70 LOAD Load defaults Reset configuration to default values 71 79 Not used Code Display Function Function detail X Y Z Default values Test and setup mode 80 TEST Test and setup Not used IM 12J05D02 01E Calibration 6 1 6 CALIBRATION PROCEDURE Calibration of the dissolved oxygen analyzer is performed in the following situations When a new dissolved oxygen sensor is installed When the membrane is replaced and or the electrolyte solution is replaced When the measuring error after cleaning exceeds the acceptable deviation from reference meth
70. ment Check Upon delivery unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment If damage is found retain the original packing materials including the outer box and then immediately notify the carrier and the relevant Yokogawa sales office Make sure the model number on the textplate affixed to the top of the display board of the instrument agrees with your order N WARNING The textplate will also contain the serial number and power supply selection Be sure to apply correct power to the unit J PLYY 115VAC 50 60Hz MAX 10VA VPT PUT 0 20mADG or 4 20mADC DO402G ay YOKOGAWA 4 Made in Japan SITES NY N N N N N N N N N N N N N N SSN Figure 1 1 Nameplate example Check that all the parts are present including mounting bracket 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 Converter EXA 402 User s Manual See model code for language Optional mounting bracket when specified See model code IM 12J05D02 01E 1 2 Introduction 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 diag nostics and enh
71. mp Comp Pt100 RTD Pt1000 RTD DO30 PB36 2k2 NTC 22k NTC SM31 DO70G w NI O 11 T UNIT Temp units Celsius o Fahrenheit 12 T ADJ Temp adjust Adjustment 7 5 C or 13 5 F 13 T MAN Manual TC Automatic temperature comp 0 Manual temp compensation 25 C 77 F 14 19 Not used Code Display Function Function detail Default values Calibration Settings 20 AT SEC Amg l Stabilization Step Stabilisation time range 10 600 s 60s DO step change range 0 50 mg l or 0 300 0 05 mg l 21 0 CAL Zero cal Zero calibration disabled Zero Calibration enabled 22 ZERO Zero entry Galvanic In case that zero check is activated in code 02 within I CELL value set in code 02 In case that zero check is not activated in code 02 19 99 yA Polarographic In case that zero check is activated in code 02 within I CELL value set in code 02 In case that zero check is not activated in code 02 199 9 nA 00 00 uA 000 0 nA SLOPE Slope entry Minimum setting 1 CELL set in code 01 x SL MIN set in code 02 Maximum setting I CELL set in code 01 x SL MAX set in code 02 3 75 pA 50 nA 23 29 Not used IM 12J05D02 01E 5 18 Parameter setting 5 3 4 mA output settings Code 30 Code 31 Code
72. n The combination of air saturated water calibration and zero calibration helps maintain the performance of the instrument IM 12J05D02 01E 1 4 Introduction Display functions and ranges The display continuously gives you all necessary information at a glance The process values are shown in easily readable programmable units Either mg l saturation or ppm can be chosen The user interface is simplified to a basic set of 6 keys accessible through the flexible window cover It uses a simple step by step question and answer style to communicate with the operator by giving mes sages on the second line of the display and indicating which keys are to be pressed in the display Automatic air calibration Calibration for a dissolved oxygen instrument is performed by simple air calibration please refer to 6 3 1 section for the optical sensor Criteria for automatic calibration stabilization time DO values can be set to suit the sensor In addition to the air calibration three additional calibration procedures can be used 1 Span calibration using air saturated water 2 Zero calibration using sulfite saturated water 3 Process calibration using laboratory reference method Alarm and control functions The EXA DO402 has four built in relay contacts From the factory the first two contacts are pre defined as a high or low alarm The third contact its pre defined as a wash contact This wash contact is driven by a wash timer with adjust
73. n 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 IM 12J05D02 01E N WARNING 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 A CAUTION This symbol gives information essential for understanding the operations and functions 9 This symbol indicates Protective Ground Terminal L This symbol indicates Function Ground Terminal Do not use this terminal as the protective ground terminal rw This symbol indicates Alternating current This symbol indicates Direct current Warranty and service Yokogawa products and parts are guaranteed free from defects in workmanship and material under normal use and service for a period of typically 12 months from the date of shipment from the manufac turer 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 inad equate 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 ser
74. n order to obtain a lower value increase past nine to zero then increase to the required number ENT When the required value has been set using the and keys press ENT to con firm the data entry Please note that the EXA 402 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 12J05D02 01E Operation 4 3 4 3 Setting passcodes 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 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 Y
75. n the textplate Remove the front cover by unscrewing the four screws to check this textplate on the top of the display board Local health and safety regulations may require an external circuit breaker to be installed The instru ment is protected internally by a fuse The fuse rating is dependent on the supply to the instrument The 250 VAC fuses should be of the time lag type conforming to IEC60127 The internal fuse is located next to the power terminals in the lower right hand corner A DANGER Use only a fuse of the specified current voltage and type ratings to prevent fire For fuse replacement refer to Section 7 3 Fuse Replacement IM 12J05D02 01E 3 6 Installation and wiring 3 3 2 Access to terminal and cable entry Terminals 1 and 2 on the bottom terminal strip are used for the power supply Guide the power cables through the gland closest to the power supply terminals The terminals will accept wires of 2 5 mm 14 AWG Use cable finishings if possible Connect the wires as indicated in the wiring diagram refer to figure 3 6 High Voltage Section EN B Cc POWER CABLE for DO70G or COMMUNICATION INPUT CONTACT D SENSOR CABLE S E F ANALOG OUTPUTS CABLE CONTACT S3 S4 FAIL OUTPUT CABLE S CONTACT S1 S2 OUTPUT CABLE S POWER CABLE Suitable for cables with an outside diameter between 6 12 mm 0 24 0 47 in Figure 3 7 Gl
76. n the unit is reassembled in order to maintain the housing s weatherproof integrity against water and water vapor The DO measurement uses small signal currents and may otherwise be prone to prob lems caused by exposure of the circuitry to condensation 7 3 Fuse Replacement This section describes how to replace the power supply fuse A DANGER Use only a fuse of the specified current voltage and type ratings to prevent fire Power to the instrument must be turned off at the external breaker before replacing the fuse After replacing the fuse install a high voltage shield plate before turning the power on Do not short circuit the fuse holder Specified Ratings of the Power Supply Fuse The power supply fuse recommended fuse used in the DO402G is as follows 100 115 V AC version Maximum rated voltage 250 V Maximum rated current 200 mA Compliance UL CSA VDE Japan s Electrical Appliance and material Safety Law Part number A1105EF 230 V AC version Maximum rated voltage 250 V Maximum rated current 100 mA Compliance UL CSA VDE Japan s Electrical Appliance and material Safety Law Part number A1103EF IM 12J05D02 01E Maintenance 7 3 How to replace the fuse 1 Before replacing the fuse turn off power to the instrument at the external breaker 2 Remove the instrument cover and the high voltage shield plate 3 Remove the cover from the fuse holder by pulling out by hand 4 Remove the fuse and install a n
77. ndication Digit Y sets the control action Process alarm is a simple On Off trip controlled by the high low setpoint Proportional duty cycle control has a pulse width modulation for proportional dosing with solenoid valves Proportional frequency control is used for controlling electrically positioned valves Temperature alarm is an On Off trip on the measured temperature Digit Z sets the control parameter With or without integral action Parameter setting 5 21 Code Display Function Function detail Zz Default values Contact Settings 40 S 1 Contact S1 Contact 1 inactive 2 0 0 Low alarm configuration High alarm configuration Active during HOLD o No Activation by process value Proportional duty cycle Proportional pulse frequency Activation by temperature w N o PI control inactive PI control active 41 S2 Contact S2 Contact 2 inactive 1 0 0 Low alarm configuration High alarm configuration Active during HOLD Wl NI 2 O Activation by process value Proportional duty cycle Proportional pulse frequency Activation by temperature WIN Oo PI control inactive PI control active 42 53 Contact S3 Contact 3 inactive 4 0 0 Low alarm configuration High alarm configuration Active during HOLD Active during WASH A ON O Activation
78. nditions or altitude can cause a variation up to 20 in the dissolved oxygen concentration A built in air pressure sensor automatically compensates for barometric influences between 900 to 1100 mbar 90 to 110 kPa Sensor diagnostics The DO sensor is checked for low impedance between the silver electrode and an earth contact in the liquid to detect membrane integrity Temperature sensor connections and sensor connections are checked for impedance These faults are signalled by the FAIL contact and can be signalled to the con trol room by an output of 0 3 5 mA or 22 mA The fault is also signalled by a special marker held on the display a LED on the front and an error code in the message display During calibration of a DO measuring system the slope deviation from nominal value and sensor out put uA at O mg l are calculated and checked If any of these are outside the limits an error is signalled IM 12J05D02 01E Introduction 1 5 Logbook Software record of important events and diagnostic data Available through RS485 for use with the Yokogawa PC402 communication software Serial Communication Bi directional according to the ElA 485 standard using HART protocol and PC402 software 1 4 Configuration checklist for DO402 Standard configuration Options Reference for change Measured variable s Primary inputs DO range DO units Temperature range Temperature unit D O and Temp 0 20 mg l mg l 0 50 C C
79. nel mounting using optional brackets Surface mounting on a plate using bolts from the back Wall mounting on a bracket for example on a solid wall Pipe mounting using a bracket on a horizontal or vertical pipe maximum pipe diameter 50 A Unit mm inch Hood optional Option code H Four M6 screws 8 0 31 deep 184 E 724 m u aa cese UT UIN SUUM h 144 da 20 0 79 23 gt 0 91 Adaptor for conduit work option code AFTG ANSI FF LIRA Cable inlet port Six 21 0 83 dia holes DIN PG13 5 cable gland A Power supply for DO70G or contact input separately Approx 55 2 17 36 1 42 B Sensor cable Adaptor 49 C Output signal 1 93 D Contact output S3 and S4 1 50 E Contact output S1 and S2 F Power supply G 1 2 female AFTG Ground terminal 1 2 NPT female ANSI Weight Approx 2 kg M4 screw Figure 3 1 Housing dimensions and layout of glands IM 12J05D02 01E 3 2 Installation and wiring a Unit mm inch 4 12 max panel thickness M6 4 screws Panel cutout dimensions 0 47 M5 2 screws 137 2 5 43 137 5 43 Figure 3 2 Panel mounting diagram Option Code PM Example of bracket used for pipe mounting M6 4 screws 174 6 85
80. ng c Press the ENT key The data display will show HIF d Press the YES key The message display will show a manufacturing control number This is the inspection mode Press the ENT key until the message display shows mA1 2 Each time the ENT key is pressed the value on the data display increases in steps of 4 0 like 0 0 4 0 8 0 up to 20 0 Check the current outputs 1 and 2 Corresponding to the data display the current output must be within the range shown in Table 1 When the data display shows 12 0 pressing the ENT key causes the message display to show RIPPLE and the data display to remain unchanged Press the ENT key again The message display will show mA and the data display 16 0 Table 1 Data Display Current Output 1 mA DC Current Output 2 mA DC 4 0 4 0 02 4 0 02 12 0 12 0 02 12 0 02 20 0 20 0 02 20 0 02 Contact Operation Test Following Section 3 3 press the ENT key until the message display shows JUMPER Then press the ENT key once the message display will show WAIT and LEDs S1 S2 WASH S3 and FAIL S4 flash rapidly Check that the message display shows and LEDs turns on off in the order as shown in Table 2 and that a message of FAIL x does not appear Table 2 Message Display 1 s2 WASH S3 FAIL S4 LED1 OFF ON ON OFF LED2 ON OFF ON OFF LED3 ON ON OFF OFF LED4 ON ON ON ON
81. nterface 50 RET Auto return No return to meas from HOLD 0 1 Return to meas after 10 min 1 51 MODE add to MAINT Setpoint adj disabled 0 0 0 0 Setpoint adj also in MAINT 1 Wash start disabled Wash start in maintenance mode Manual pressure disabled Manual pressure enabled 52 PASS Password Direct access to MAINT 0 0 0 Pass 111 for 1 MAINT protected by password 333 for 2 Direct access to COMM 777 for 3 COMM protected by password 888 for 4 Direct access to SERV 123 for 5 957 for 6 SERV protected by password 331 for 7 546 for 8 847 for 9 53 Err 01 Error setting Response amp Time failure Soft fail 0 Response amp Time failure Hard fail 1 1 Hard Err 02 Zero calibration Soft fail 0 Zero calibration Hard fail 1 1 Hard Err 03 Slope calibration Soft fail 0 Slope calibration Hard fail 1 1 Hard Err 04 Membrane failure Soft fail 0 Membrane failure Hard fail 1 1 Hard Err 07 Temperature sensor open Soft fail 0 Temperature sensor open Hard fail 1 1 Hard Err 08 Temp sensor shorted Soft fail 0 Temp sensor shorted Hard fail 1 1 Hard Err 09 Cell current abnormal Soft fail 0 Cell current abnormal Hard fail 1 1 Hard Err 12 Abnormal measured value Soft fail 0 Abnormal measured value Hard fail 1 1 Hard Err 16 Cell for maintenance Soft fail 0 0 Soft interval time exceeded Cell for maintenance Hard fail 1 interval time exceeded Err 22 Control time out Soft fail 0 0 Soft Control time out Hard fail 1 SOFT LCD F
82. od When error message E12 or E16 indicates the need for maintenance Note When a new sensor is installed when the membrane is replaced and or the electrolyte solution is replaced it may take some time for the electrodes to stabilize due to the initial electrolysis In particular a zero calibration should be performed after the electrodes are exposed to the air or immersed in sam ple water for about half a day When the sensor cable terminals 13 and 15 are shorted together before installation the time for the zero point to stabilize can be reduced Note It may take a long time for the electrodes to stabilize in the first electrolysis just after installing the DO30G sensor or other galvanic sensors and polarographic sensors or after replacing the membrane or electrolyte solution The zero calibration in particular should be carried out after leaving the sensor operating in air or measurement liquid for about half a day The time for stabilizing the zero point can be reduced by shorting the terminals 13 and 15 of the sensor cable before installation 6 1 General 6 1 1 Calibration methods There are three methods for calibration of the EXA dissolved oxygen analyzer air calibration water cali bration and manual calibration Air calibration This is the most common and easiest way to calibrate the analyzing system The calibration is done in AIR CAL mode in maintenance level Water calibration This is the traditional way to calibrat
83. oling ctra a 8 1 8 1 Measures in the case of converter operation failure 8 1 8 1 1 No dissolved oxygen converter operation enak senak 8 1 8 1 2 Operation key or display failure sssssesseeeeemm emnes 8 1 8 2 Measures in the case of failure Error detectiOn 8 2 A ameet IE 9 1 TO ADDOGIX usage See 10 1 A EUH es 10 1 102 Range nitritos e 10 1 103 Hold ois ob d bred o DU aU dut e a aM aT LE 10 1 10 4 WV AS IN hist a d id 10 1 10 5 User setting table nota 10 2 IM 12J05D02 01E 11 Appendix 2 QUALITY INSPECTION rrrnnnnnnnvvvvnnnnnnnnnnnnvvnnnnnnnnnnnvnnnnnnnnnnnnnnnnennr 11 1 Customer Maintenance Parts List for Style S3 CMPL 12J05D02 03E Revision Record rrnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnunnnenn i IM 12J05D02 01E Introduction 1 1 1 INTRODUCTION AND GENERAL DESCRIPTION The Yokogawa EXA is a 4 wire coverter designed for industrial process monitoring measurement and control applications This instruction 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 typi cal user questions Yokogawa can not be responsible for the performance of the EXA analyzer if these instructions are not followed 1 1 Instru
84. ontrol on the relay outputs the expiry time can be enabled to warn of an ineffective control In other words when the setpoint is exceeded for more than 15 minutes an error message is generated This can mean for example that the reagent tank is empty Parameter setting 5 23 Code Display Function Function detail Default values Contacts Settings 44 D TIME Dead Time Delay after setpoint passed 0 2 0 s 0 2 s P HYST Hysteresis Process value hysteresis 0 50 mg l or 0 300 0 1 mg l T HYST Temp hyst Temperature hysteresis 0 5 C 0 12 F 0 5 C 45 RANGE Prop control Proportional range 0 50 mg l 5 0 mg l PER Duty cycle Period Duty cycle 5 100 s 10 0 s FREQ Frequency Frequency control 50 120 per min 70 p m 46 tI CNT Integral time Int time for contacts 10 1999 s 100 s 47 EXPIR Time out alarm Disable time out alarm 0 Enable time out alarm E mn time out alarm after 0 5 199 9 min 15 min 48 49 Not used IM 12J05D02 01E 5 24 Parameter setting Control and Alarm Functions Control output mA PI control on the 2nd mA output The 2nd mA output can be configured to give a P I proportional and integral control output The setpoint proportional band and integral time are each fully programmable Adjustable parameters Setpoint proportional range and integral time Process alarm The contact will be switched when the process value reaches
85. ow keys users can navigate through the process of setting range setpoints hold wash and service functions IM 12J05D02 01E 5 6 Parameter setting 5 2 1 Setpoints KRANG IM 12J05D02 01E Parameter setting 5 7 Process Alarms on S3 and S4 are only available when enabled in Service Codes 40 49 Analogue control setpoint is only available when enabled in Service Code 31 Adjust setpoint value using gt A ENT keys as shown for setpoint 1 T P YES NO Setpoint confirmed return to commissioning menu IM 12J05D02 01E 5 8 Parameter setting 5 2 2 Range See facing page NO A
86. pe driving voltage supplied by con verter The input range varies from 0 0 nA up to 500 nA for optical polarographic sensors and 0 0 to 50 pA for galvanic sensors Temperature measurement for automatic temperature compen sation utilizes Pt100 PT1000 RTD elements or PB36 as used in DOX8 DO30 and DO70G sensors as well as the 22 k NTC as used by the Hamilton Oxyferm B Measurement ranges DO Temperature C Span 0 50 mg l ppm 0 50 C 32 122 F DO concentration minimum 1 mg l ppm 96 saturation Temperature maximum 50 mg l ppm minimum 10 96 maximum 300 96 minimum 25 C 77 F maximum 50 C 122 F D Output Signals Two isolated outputs of 0 4 20 mA DC with common nega tive Maximum load 600 Ohm Auxiliary output can be chosen from Temperature DO Pl con trol table burn up 22 mA or burn down 0 or 3 5 mA to sig nal failure Specification 2 1 E Temperature compensation F Calibration 0 50 C Sensor types Pt100 or Pt1000 RTD PB36 Yokogawa compat ible 22 k NTC Ingold compatible Automatic or Manual tempera ture compensation Semi automatic calibration with automatic compensation for influence of barometric pressure and altitude on partial pressure of oxygen in air or solubility of oxygen in water Automatic compensation for influence of salinity of water on solubility of oxygen in water is programma ble The correction for pres
87. perature failure too low It falls below 0 C or 32 0 F Measuring solution temperature is low CODE 10 setting is not correct Sensor cable wiring failure Temperature sensor has failed Input current failure It does not satisfy the following equation input current lt 50 pA for galvanic sensor 500 nA for polarographic sensor and optical sensor Examine the temperatures of the measuring solution and sensor and the CODE 10 setting Examine the sensor cable connection status If the temperature sensor fails abnormal resistance replace the sensor Examine the setting for CODE 01 02 Troubleshooting 8 3 Error Generation No Mode All modes EEPROM writing failure Turn off the power and then turn it Electronic circuit failure back on and check whether or not the system returns to normal Error content and Causes Countermeasures If the failure occurs again contact Yokogawa to request repair All modes Abnormal measured value Examine the setting for CODE 01 02 The dissolved oxygen value sat exceeds 10 12 amp 54 150 or value set in CODE 54 Accurately perform calibration CODE 12 Temperature error correction failure Accurately measure the temperature of The difference between the corrected value the measuring solution dissolved oxygen and the standard value exceeds the range sensor corresponding to 7 5 C 13 5 F Examine whether the sensor cable fails Temperature entry is not
88. ply 1400 V AC an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz or 60 Hz between the power terminals shorted together 1 and 2 and the protective earth terminal outside of the case for at least 2 seconds The insulation must withstand this voltage The sensed current should be 15 mA 3 3 Current Output Test Use the following procedure to enter the inspection mode 1 Entering Service Code 87 Press the key The message display will show SETP Press the NO key four times The message display will show SERV Press the YES key The data display will show 00 with the first digit of O flashing Press the 1 key eight times The data display will show 80 with the first digit of 8 flashing e Press the gt key once The data display will show 80 with the second digit of O flashing oo YOKOGAWA 9 QIS 12J05D02 01E A 1st Edition Sep 1998 Yokogawa Electric Corporation 7th Edition Sep 2013 IM 12J05D02 01E 11 2 Appendix 2 3 4 3 5 2 4 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 Press the gt key once The data display will show 000 with the second digit of O flashing b Pressthe key seven times The data display will show 070 with the second digit of 7 flashi
89. s description for EMC revised Page 4 4 Figure of Section 4 4 Display functions default modified Page 5 16 Explanation of the code 21 modified Page 5 25 Some revision of the code 53 Err 16 error setting Page 6 1 Caution of calibration added to Sec 6 Page 6 4 Some revision of Sec 6 3 1 and note for water calibration method of Sec 6 3 2 modified Last page Added of KC mark Page 2 2 2 3 3 4 Safety standard is revised Page 3 10 to 3 11 Some revision of section 3 8 Wiring the standard optical sensor DO70G Page 5 1 Some revision of section 5 1 Maintenance mode Page 5 2 Some revision of section 5 1 1 Manual activation of Hold Page 5 11 Some revision of section 5 2 3 Hold Page 7 1 Some revision of Table 7 2 Page 8 2 to 8 3 Some revision of Table 8 1 Page Appendix 2 11 1 to 11 5 QIS 12J05D02 01E QIC 12J05D02 01 revised some change of dielectric strength test CMPL 12J05D02 03E revised to 2nd edition some of P N changed IM 12J05D02 01E
90. sh time 0 5 minutes 0 1 minutes 10 0 minutes Recovery time 0 5 minutes 0 1 minutes 10 0 minutes IM 12J05D02 01E 10 2 Appendix 10 5 User setting table FUNCTION SETTING DEFAULTS USER SETTINGS Parameter specific functions 01 S TYPE 0 Galvanic 7 uA I CELL 0 3 75 uA 02 CHECK 0 1 0 Zero Off Slope On Membrane Off 04 SAL TY 0 Off Temperature measuring functions 10 T SENS 1 Pt1000 11 T UNIT 0 C 12 T ADJ None 13 T MAN 0 Off Calibration parameter functions 20 AT SEC 60 sec Amg l 0 05 mg l 21 0 CAL 0 Off 22 ZERO 0 pA nA SLOPE 3 75 50 pA nA mA outputs 30 mA 1 1 both 4 20mA 31 OUTP F 0 2 DO 8 Temp D R 0 Reverse control 32 BURN 0 0 both off 33 RG mA2 5 0 mg l only for PI control 34 tl mA2 100 sec only for PI control 35 TABL1 21 pt table see code 31 810 1 36 TABL2 21 pt table see code 31 810 1 37 DAMP 0 sec 38 SWTCH 0 Off Contacts 40 S1 2 0 0 high process Al 41 S2 1 0 0 low process Al 42 S3 4 0 0 WASH 43 S4 4 0 0 FAIL 44 D TIME 0 2 sec P HYST 0 1 mg l T HYST 0 5 C 45 RANGE 5 0 mg l PER 10 0 sec FREQ 70 p min 46 1 CNT 100 sec only for Pl control 47 EXPIR 0 off tE min 15 min IM 12J05D02 01E Appendix 10 3
91. spose them as domestic household waste Battery type silver oxide battery Notice The symbol see above means they shall be sorted out and collected as ordained in ANNEX II in DIRECTIVE 2006 66 EC IM 12J05D02 01E TABLE OF CONTENTS PREFAGE As 1 1 Introduction And General Description seen 1 1 1 1 Instrument Check uie ee 1 1 1 2 APP SON Lande en EA TA rende 1 2 1 3 General infomallon eura is es TR A ita 1 3 1 4 Configuration Checklist for DO402 copla a Ba 1 5 1 5 System Configuration lt a A 1 6 1 5 1 Dissolved Oxygen Sensor ee aaa kekeke eerie Kad Kana a dan Kanan anna adaa 1 6 125 2 The holders a no Ed Fn D ER a ae otl 1 7 2 DO402G SPECIFICATIONS teen ee cce co eta napis ana ea Ag ates C Ceu neg o ea carae Desa sea eain ee Ee 2 1 2 1 A A c ME 2 1 2 2 Operating Specifications 2 5 oli in oceania 2 2 2 3 Model and suo 80488 sd 2 3 3 Installation And Wiring 2 22 22 ae are 3 1 3 1 Installation and dimensions 4442444444044400HHnnnnnnnnnnnnnnnnnnnnnennnnne een 3 1 3 121 Installation ste ae ae ee eee ee 3 1 3 1 2 Mounting methods dd 3 1 dos MVNO GE ERE ee levis Dira S EE 3 3 3 2 1 Wiring of DOSQ0Q hd ne mee Eee tibia ada devine ee 3 3 322 2 Wiring of DOTOG f nie satan A One date Glade 3 3 3 2 3 PODA seele 3 4 3 3 Wiring the power supply iii nee 3 5 3 3 1 General precautions iscir aoia aaa a a a ea a aaae
92. sure salinity and temperature meets ISO 5814 Possible calibration routines are Slope span calibration in ambient air The calibration table is based on 70 96 RH and is determined empirically Slope span calibration in water saturated with air according ISO 5814 Zero calibration normally inac tive G Serial Communication H Logbook I Display Bi directional according to the EIA 485 standard using HART protocol and PC402 software Software record of important events and diagnostic data Available through RS485 with key diagnostic information avail able in the display Custom liquid crystal display with a main display of 31 digits 12 5 mm high Message display of 6 alphanumeric characters 7 mm high IM 12J05D02 01E 2 2 Specification J Contact outputs General Four 4 SPDT relay contacts with LED indicators For S1 S2 and S3 the LED is on when relay is powered NOTE For 84 FAIL LED lights when power is removed Fail safe Contact outputs configurable for hysteresis and delay time Capacity Maximum values 100 VA 250 V AC 5 Amps Maximum values 50 Watts 250 V DC 5 Amps Status High Low process alarms selected from process parameters and temperature Contact output is also available to signal Hold Active Contact S4 Closed On Off Proportional duty cycle control with integral term Proportional frequency control with integral term In addit
93. t Pollution degree indicates the degree of existence of solid liquid gas or other inclusions which may reduce dielectric strength Degree 2 is the normal indoor environment N Shipping details Package size w xh xd 290 x 300 x 290 mm 115x 11 8 x 11 5 in Packed weight approx 2 5 kg 5lb 2 2 Operating specifications A Performance DO at t process 25 C Linearity 0 03 mg l or 0 5 FS whichever is greater Repeatability 0 03 mg l or 0 5 FS whichever is greater Accuracy 0 05 mg l or 0 5 FS whichever is greater Specification 2 3 B Performance Temperature Pt1000 PB36 K Power interruption 22kNTC Less than 50 milliseconds no Linearity 0 3 C effect Repeatability 0 1 C Accuracy 0 3 C L Operation protection Performance Temperature Pt100 3 digit programmable password Linearity 0 4 C Repeatability 0 1 C M Connection via cables Accuracy 30 4 C The distance between the ensor and trans Note on performance specifications mitter can be up to 50 m if the WTB10 junc The specifications are expressed with sim tion box is used This junction box can ulated inputs because the DO402G can be not be used for the DO70G for which the used with many different sensors with their allowable maximum distance is10 m unique characteristics The following tolerance is added to above 2 3 Model and suffix codes performance Style S3
94. t stop wash cleaning when enabled in service menu section 5 service code 51 See section 5 3 for adjustment procedure Manually switch on off HOLD when enabled in commissioning menu section See section 5 2 for adjustment procedure Manually input a temperature value for a sensor without a temperature sensor when enabled in service menu section 4 service code 13 See section 4 4 for adjustment procedure Manually input a pressure value when the pressure sensor in the DO402G is not used when enabled in service menu section 4 service code 51 See section 4 4 for adjustment procedure IM 12J05D02 01E 5 2 Parameter setting 5 1 1 Manual activation of Hold MEASURE SETPOINTS RANGE SET HOLD SERVICE CONTACTS s MARKINGS WITHIN ENCLOSURE a AIR CAL gt MEASURE pi Note The HOLD feature must first be activated in the commissioning mode section 5 2 3 Refer to note of section 5 2 3 Hold also IM 12J05D02 01E Parameter setting 5 3 5 1 2 Manual Wash start stop MEASURE SETPOINTS RANGE CONTACTS os os wastiss Qs MARKINGS WITHIN ENCLOSURE AIR CAL
95. t the manual pressure is enabled Press YES to uu proceed Li gt LI I If ET ves no ED Lil AI Place sensor YES in calibration solution from 2 The instruments waits for the reading to stabilize The display flashes When reading Is stable the CAL END message appears Note To start calibration with a zero solution press NO zero calibration must be activated in service Press YES for single point code 21 adjustment YES After briefly displaying WAIT the display returns to the normal readout Transfer to zero solution and press YES When the reading is stable the CAL END message appears Press YES Yes gt After briefly displaying WAIT the display returns to the normal readout IM 12J05D02 01E 6 6 Calibration 6 4 Calibration method using manual calibration method 6 4 1 Preparation a Cleaning Confirm that the readings of the analyzer are stable and measured with a clean sensor Otherwise move the sensor to a maintenance site and wash off any dirt on the sensor membrane Move the sensor back to the process water and wait for the readings to stabilize b Sampling The manual calibration procedure involves ad
96. table item is the type of temperature sensor used The EXA can be adjusted for any one of four 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 man ual in conjunction with the corresponding sensor user s manual IM 12J05D02 01E Introduction 1 3 1 3 General information Flexibility reliability and low maintenance are among the benefits provided by the EXA DO402G dis solved oxygen analyzer Designed to meet the exacting requirements of measuring dissolved oxygen in the modern industrial environment it contains many features to ensure the best precision whatever the application This 4 wire converter is housed in a robust IP65 field mountable case Two mA outputs four relays dig ital communication and a clear LCD make the DO402G a truly comprehensive package The DO402G features PI control on both the auxiliary mA output and the pulse proportional relay out puts thus avoiding the need for a separate controller The famous EXA sensor diagnostics are now expanded with a logbook facility in combination with the
97. to 20m gt Alarm Contact Output 4 Contact Point High Low Alarm we Cleaning Time Alarm Contact I EN X HOLD Contat X SN 100V AC 15 For DO30G _ i 115V AC 15 230V AC 15 EE Terminal Box WTB10 DO3 Select pin terminal for DO402G gt eSubmersion Type Ho Suspension Type Ho Spere Parts Set DOX8HS HH350G No Cleaning Jet Cleaning DOX8A For DO30G i H Calibration Set DOX8 W For DO30G Da For DO70G FO1 EPS 1 5 1 Dissolved Oxygen Sensor The DO402G can be used with a variety of sensors Some specific programming may be necessary to match the converter with the sensor a DO70G sensor This sensor features temperature compensation with a 22k NTC RTD The nominal output of this sensor is 60 nA in air under reference conditions Before use enter the service mode Select service code 01 S TYPE and set it to 1 polarographic sensor then press the ENT key Select 1 CELL2 9 and set the nominal output to 60 nA Next select service code 10 T SENS and set it to 3 22k NTC Then select service code 21 0 CAL and set it to 1 zero calibration enabled because two point calibration by air saturated water calibration and zero calibration are required For details refer to GS12J05D04 01E b Model DOX8SM sensor This sensor is a galvanic sensor with a PB36 type temperature compensator and a 25 micron me
98. trip chart recorders Figure 3 6 3 5 2 Analog output signals The output signals consist of active current signals of either 0 20 mA or 4 20 mA The maximum load can be 600 ohms on each It should be necessary to use screening shielding on the output signal cables Terminal 63 is used to connect the shielding 3 6 Wiring the standard galvanic sensor The sensor cable has markers on the individual wires These markings refer to the markers on the terminals The temperature compensator has two wires with the markings T1 T2 and or 11 12 and must be connected to terminal 11 and 12 The measuring electrode the cathode is marked with IE and or 13 and must be connected to terminal 13 The reference electrode the anode is marked with RE and or 15 and must be connected to terminal 15 The liquid earth solution ground is marked with 16 and must be connected to terminal 16 Note The liquid earth solution ground connection is valid only when the floating ball holder Model PB350G or PB360G is used Otherwise do not make a connection to terminal 16 The connection if made may result in abnormal readings Even if the floating ball holder is Figure 3 10 Cable gland assembly used when the liquid earth solution ground connection is not used then disconnect the wiring to terminal 16 The disconnected wire should be covered with an insulating tube to avoid contact with other terminals The overall shield of the cable is
99. uit your own custom requirements Figure 3 6 In the Non Alarm or Power Off states contacts S1 S2 and S3 are OFF Common C and Normally Closed NC are in contact In the Fail or Power Off states contact S4 is ON Common C and Normally Closed NC are in con tact You can either use them to switch AC power or switch a DC Voltage for digital interfacing Default settings The contact S1 is pre programmed for high alarm function The contact S2 is pre programmed for a low alarm function The contact S3 is pre programmed for wash function The contact S4 is pre programmed for FAIL N WARNING The three control contacts S1 to S3 can be used for simple process control by programming their func tion Chapter 5 The FAIL contact is programmed to signal a fault in the measuring loop Always con nect the FAIL contact to an alarm device such as a warning light sound annunciator or alarm panel to make full use of the fault detection possibilities self diagnostics of the EXA converter 3 4 3 Contact input It is necessary to use screening shielding on the output signal cables Screw M3 23 is used to connect the shielding On resistance 100 or less Off resistance 100kO or more IM 12J05D02 01E Installation and wiring 3 9 3 5 Wiring the analog output signals 3 5 1 General precautions The analog output signals of the EXA transmit low power standard industry signals to peripherals like control systems or s
100. uts Use the three glands at the back for these cables Replace the screen shield plate over the lower terminals oo RON N WARNING Always replace the screen plate over the power and contact outputs for safety and to avoid interference 7 Connect the analog output s the sensor input the contact input and if necessary the RS485 serial bus 8 Use the front three glands for analog output sensor input contact input and communication cabling see figure 3 6 9 Close the display board and switch on the power Commission the instrument as required or use the default settings 10 Replace the cover and secure frontplate with the four screws Tighten four frontplate screws to 1 5 N m torque IM 12J05D02 01E Installation and wiring 3 5 FRONT GLANDS REAR GLANDS Output signals Contact S1 A output Contact output xD QO Qe re Contact intput Figure 3 6 System configuration 3 3 Wiring the power supply 3 3 1 General precautions Make sure the power supply is switched off Also make sure that the power supply is correct for the specifications of the EXA and that the supply agrees with the voltage specified o
101. vice depart ment of the relevant sales organization for repair or replacement at Yokogawa discretion The following information must be included in the letter accompanying the returned goods Part number model code and serial number Original purchase order and date Length of time in service and a description of the process Description of the fault and the circumstances of failure Process environmental conditions that may be related to the installation failure of the device A statement whether warranty or non warranty service is requested Complete shipping and billing instructions for return of material plus the name and phone number of a contact person who can be reached for further information Returned goods that have been in contact with process fluids must be decontaminated disinfected before shipment Goods should carry a certificate to this effect for the health and safety of our employees Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed How to dispose the batteries This is an explanation about the new EU Battery Directive DIRECTIVE 2006 66 EC This directive is only valid in the EU Batteries are included in this product Batteries incorporated into this product cannot be removed by yourself Dispose them together with this product When you dispose this product in the EU contact your local Yokogawa Europe B V office Do not di
102. wn in Table 6 Table 6 Reference nA Data Display nA 0 0 10 2 80 80 0 2 160 160 0 2 Press the ENT key until the message display shows POLAR2 Change the current of the standard current generator and check the data display The value on the data display must be within the range shown in Table 7 Table 7 Reference nA Data Display nA 100 100 0 2 300 300 1 500 500 1 QIS 12J05D02 01E IM 12J05D02 01E 11 4 Appendix 2 4 4 3 7 Atmospheric Pressure Indication Check Following Section 3 6 press the ENT key until the message display shows PRESS Check that the data display indication at this time is within the range from 900 hPa to 1100 hPa Press the ENT key The message display will show READY Continue to press the ENT key to return to normal measurement mode Current Output 1 Current Output 2 Standard Current DC Ammeter DC Ammeter Generator 11 12 T4 T2 DO402G Converter Power Supply Figure 1 Testing Circuit and Test Equipment QIS 12J05D02 01E IM 12J05D02 01E Appendix 2 11 5 H R TEST CERTIFICATE SZ E BERTE LG PRODUCT NAME DISSOLVED OXYGEN CONVERTER HA MODEL DO402G FANO HRES ORDER NO SERIAL NO RAAH INSPECTION ITEM f 52 RESULT 8 APPEARANCE fet HEEL SEES 1 2 f amp 8c7 A MO REM TR 100MQ LE 500V DC INSULATION BETWEEN POWER SUPPLY TERMINALS 1 2 AND PROTECTIVE EA
103. y i gt MEASURE N2 N2 N2 NA R2 T E 20 CAL RANGES i vES No gt i AT MAN CAL SET HOLD VN YN VN YN MN IN P A ent a DISPLAY WASH H SERVICE Key prompt flags gom 7 Jo CONTACTS Mel A c5 Os Commissioning uM O mode access key D Selection keys wasuss d YES Accept setting i O Fausa Relay contact NO Change setting ES gt S 7 status indicators OKOGAWA 4 Sn keys Na Choose digit to M Measure Maintenance adjust Ir mode key Adjust digit Broken line indicates area ENT Confirm change that can be seen through front cover Figure 4 1 DO402 operator interface 4 2 Explanation of operating keys MODE key This key toggles between the Measuring and Maintenance modes Press once to obtain access to the maintenance function menu Level 1 see table 4 1 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 gt A ENT gt 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 A 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 i

Model DO402G Dissolved Oxygen Converter [Style: S3]

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