User’s Manual Model DC402G [Style: S2] Converter for Dual Cell Conductivity and Resistivity IM 12D08E02-01E IM 12D08E02-01E 4th Edition
PREFACE 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.
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. CAUTION This symbol gives information essential for understanding the operations and functions. This symbol indicates Protective Ground Terminal This symbol indicates Function Ground Terminal (Do not use this terminal as the protective ground terminal.) This symbol indicates Alternating current.
TABLE OF CONTENTS PREFACE.....................................................................................................................1 1. Introduction And General Description.............................................................. 1-1 1-1. Instrument Check............................................................................................. 1-1 1-2. Application....................................................................................................... 1-2 2.
-3-3. 5-3-4. 5-3-5. 5-3-6. 5-3-7. 5-3-8. 5-3-9. Temperature compensation functions............................................................................5-16 mA output functions........................................................................................................5-18 Contact outputs..............................................................................................................5-20 User interface...........................................................................
Introduction 1-1 1. Introduction And General Description The Yokogawa EXA 402 is a 4-wire converter 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 typical user questions. Yokogawa can not be responsible for the performance of the EXA analyzer if these instructions are not followed. 1-1.
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-diagnostics and enhanced communications capability to meet the most advanced requirements. The measurement can be used as part of an automated process control system.
Specification 2-1 2. DC402G Specifications 2-1. General specifications A. Input specifications : Two inputs , each 2-electrode measurement with square wave excitation, using cell constants(C) from 0.008 to 50.0 cm-1, with up to 60 metres (200ft) connection cable. B. Detection method : Frequency, read-pulse position and reference voltage are dynamically optimized. C. Input ranges Minimum : 1µS x C at process temperature (underrange 0.000 µS/cm).
2-2 Specification H. Display : Custom liquid crystal display, with a main display of 31/2 digits 12.5 mm high. Message display of 6 alphanumeric characters, 7 mm high. Warning flags and units (mS/cm, kΩ·cm, µS/cm and MΩ·cm) as appropriate. I. Contact Outputs - General : Four (4) SPDT relay contacts with LED indicators. For S1, S2, and S3, the LED is on when relay power is removed. NOTE: For S4 (FAIL) LED lights when relay is deenergised (Fail safe).
Specification 2-3 E. Housing :C ast aluminium case with chemically resistant coating, cover with flexible polycarbonate window. Case color is off-white and cover is moss green. Cable entry is via six PG13.5 nylon glands. Cable terminals are provided for up to 2.5 mm finished wires. Weather resistant to IP65. Pipe wall or panel mounting, using optional hardware. F. Data protection : EEPROM for configuration and logbook, and lithium battery for clock. G. Watchdog timer : Checks microprocessor H.
Installation and wiring 3-1 3. Installation And Wiring 3-1. Installation and dimensions 3-1-1. Installation site 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 .
3-2 Installation and wiring Unit: mm (inch) 23 (0.91) 12 max.(panel thickness) M6, 4 screws Panel cutout dimensions (0.47) M5, 2 screws 137 +20 100 (3.94) (5.43) 137 +20 (5.43) 178 (7.01) Figure 3-2. Panel mounting diagram (Option Code: /PM) Example of bracket used for pipe mounting 188 M6, 4 screws (7.40) 174 (6.85) 200 (7.87) 50 (1.97) Nominal 50A (O.D 60.5mm) (2 inch) mounting pipe 100 (3.94) Example of bracket used for wall mounting 135 (5.31) 13 M6, 4 screws (0.
Installation and wiring 3-3 Figure 3-4. Internal view of EXA wiring compartment DANGER • Never apply power to the DC402G converter and other instruments connected to the DC402G converter until all wiring is completed. WARNING • This 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 DC402G converter. 2.
3-4 Installation and wiring 3-2. Preparation Refer to figure 3-4. The relay contact terminals and power supply connections are under the screening (shielding) plate. These should be connected first. Connect the sensor and outputs. To open the EXA 402 for wiring: 1. Loosen the four frontplate screws and remove the cover. 2. Use the rubber knob in the lower righthand corner and swing open the display board to the left. 3. The upper terminal strip is now visible. 4.
Installation and wiring 3-5 FRONT GLANDS Sensors 0/4-20 mA Output signals 0/4-20 mA REAR GLANDS Power S1 Contact output S2 S3 Contact output S4/FAIL Contact input 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 on the nameplate.
3-6 Installation and wiring Sensor inputs 22 21 11 12 14 15 mA Outputs 11 12 14 15 63 Temp Temp SENSOR 1 CONT 65 62 61 95 94 93 92 91 mA1 mA2 Screen Screen 23 66 SENSOR 2 mA OUTPUT DC402 REFER TO INSTRUCTION MANUAL FOR CONNECTIONS Relay Contacts 71 72 73 51 52 53 250VAC 250VDC 5A 100VA 5A 50W Power Supply 41 42 43 31 32 33 C NC NO C NC NO C NC NO C NC NO S3 S1 S4 S2 115 VAC 230 VAC 3 2 1 G N L FUSE 250VAC; T 200mA 250VAC; T 100mA Figure 3-7.
Installation and wiring 3-7 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.
3-8 Installation and wiring 3-6. Sensor wiring Refer to figure 3-9, which includes drawings that outline sensor wiring. The EXA DC402G can be used with a wide range of commercially available sensor types if provided with shielded cables, both from Yokogawa and other manufacturers. The sensor systems from Yokogawa fall into two categories, the ones that use fixed cables and the ones with separate cables.
Installation and wiring 3-9 3-8. Other sensor systems To connect other sensor systems, follow the general pattern of the terminal connections as listed below: 11 and 12 Always used for temperature compensation resistor input (Pt1000, Ni100, Pt100, PB36 and 8k55) 14 Normally used for the outer electrode 15 Used for inner electrode In case a 4-electrode measuring system will be used, 14 and 16 should be used for the current electrodes.Please ensure that shielded cabling will be used.
3-10 Installation and wiring Figure 3-12.
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.
4-2 Operation Fail flag Output hold flag Menu pointer flags Units Main display HOLD FAIL MODE cm k mS/cm M cm S/cm Message display YES NO ENT MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP.
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 commissioning (setup) of the instrument. The passcodes should then be recorded safely for future reference. When passcodes have been set, the following additional steps are introduced to the configuration and programming operations: Maintenance Press MODE key.
4-4 Operation 4-5. Display functions Sequence for resistivity function parallels this conductivity example. Computed value µS / c m Cell temperature µS / c m Displ. 1 = Sensor 1 Calculation type Displ. 2 = Sensor 2 MODE NO NO Uncompensated SC (if USP is enabled in service code 57) µS / c m YES YES NO µS / c m YES NO YES (See Setpoint menu Chapter 5-1) NO NO µS / c m µS / c m YES NO YES (See Calibration menu Chapter 6) NO DISP.1 or DISP.
Parameter setting 5-1 5. Parameter setting 5-1. Maintenance mode 5-1-1. Introduction Standard operation of the EXA instrument involves use of the Maintenance (or operating) mode to set up some of the parameters. Access to the Maintenance mode is available via the six keys that can be pressed through the flexible window in the instrument front cover. Press the “MODE” key once to enter this dialog mode.
5-2 Parameter setting 5-1-2. Manual activation of Hold MODE S/cm MEASURE YES NO SETPOINTS RANGE SET HOLD TEMP. SERVICE CONTACTS MODE * S1 S2 S3 ENT FAIL/S4 MARKINGS WITHIN INCLOSURE YOKOGAWA MODE NO S/cm YES CAL 1 NO NO NO NO NO S/cm YES YES S/cm YES NO NO HOLD NO YES HOLD S/cm MEASURE YES NO DISPLAY 1 Note: The HOLD feature must first be activated in the commissioning mode section 5.2.
Parameter setting 5-3 5-1-3. Setpoint adjustment Note: To enable adjustments of setpoints in maintenance mode, Service Code 51 must be set to "ON". Setpoints available will depend on their configuration in the Service Code. MODE S/cm MEASURE YES NO CONTACTS MODE S1 SETPOINTS RANGE SET HOLD TEMP. SERVICE * S2 S3 ENT FAIL/S4 MARKINGS WITHIN INCLOSURE YOKOGAWA MODE S/cm YES CAL 1 NO NO NO NO NO For adjustments, follow procedures as in section 5.2.
5-4 Parameter setting 5-2. Commissioning mode 5-2-1. Introduction In order to obtain peak performance from the EXA DC402, you must set it up for each custom application. Setpoints Alarms are set by default S1 - high process alarm S2 - low process alarm S3 - not activated 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.
Parameter setting 5-5 5-2-2. Setpoints MODE M cm MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP.
5-6 Parameter setting Process Alarms on S.3 and S.4 are only available when enabled in Service Codes 40-49 Analog control setpoint is only available when enabled in Service Code 31 NO YES NO YES NO NO NO YES NO YES NO YES mS / c m YES NO ENT > Adjust setpoint value using > ENT keys as shown for setpoint 1. Setpoint confirmed. Return to mode ENT commissioning. mS / c m ENT ENT ENT ENT ENT ENT ENT ENT ENT ENT ENT mS / c m ENT Negative signs only appear for temp. settings.
Parameter setting 5-7 5-2-3. Range MODE S/cm S/cm MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP.
5-8 Parameter setting Choose Range to adjust, then set begin scale (0%) and end scale (100%) of the mA output signal, using the > >, and ENT keys. Selection of mA output(0-20 / 4-20 mA) is in Service Code 30. The decimal point and unit setting can be changedas described before in Setpoint Settings.
Parameter setting 5-9 5-2-4. Hold MODE S/cm MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP. SERVICE * YES NO NO YES NO NO YES YES YES YES NO NO NO YES YES NO NO NO NO HOLD deactivated, return to commissioning menu. YES NO YES HOLD HOLD YES NO YES NO NO YES YES NO YES NO HOLD active last measured value.
5-10 Parameter setting HOLD values set, return to commissioning menu. HOLD HOLD ENT ENT HOLD HOLD ENT ENT ENT Set HOLD "fixed value" for mA2. HOLD ENT HOLD YES Set HOLD "fixed value" for mA1.
Parameter setting 5-11 5-2-5. Temperature compensation 1. Why temperature compensation? The conductivity of a solution is very dependent on temperature. Typically for every 1 °C change in temperature the solution conductivity will change by approximately 2 %. The effect of temperature varies from one solution to another and is determined by several factors like solution composition, concentration and temperature range.
5-12 Parameter setting MODE µS / c m MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP. SERVICE * After briefly displaying*WAIT* it will be possible to adjust the display reading to the correct value using> >, ,ENT . NO µS / c m YES NO ENT NO NO YES ENT YES YES NO NO *TEMP.1 NO NO Briefly*WAIT* YES or *TEMP.
Parameter setting 5-13 5-2-6. Service MODE M cm MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD SETPOINTS RANGE SET HOLD TEMP. SERVICE * YES After changing the parameter, the instrument first goes into reset to load the parameter specific default values.
5-14 Parameter setting 5-3. Notes for guidance in the use of service coded settings Don't set or input service code numbers other than the code numbers defined in this manual. Setting an undefined service code may make the converter malfunction. When an undefined service code is input by some accident, push the MODE key and escape from the service level. 5-3-1. Parameter specific functions Code 1 *SC.RES Choose the required parameter, either conductivity or resistivity.
Parameter setting 5-15 Code 12 *T.ADJ 1 First select sensor 1 or sensor 2 for temperature adjustment (*T.ADJ 1 or *T. ADJ 2). With the process temperature sensor at a stable known temperature, the temperature reading is adjusted in the main display to correspond. The calibration is a zero adjustment to allow for the cable resistance, which will obviously vary with length. *T.
5-16 Parameter setting 5-3-3. Temperature compensation functions Code 20 *T.R.°C Choose a temperature to which the measured conductivity (or resistivity) value must be compensated to. Normally 25°C is used, therefore this temperature is chosen as default value. Limitations for this setting are: 0 to 100 °C. If *T.UNIT in code 11 is set to °F, default value is 77°F and the limitations are 32 - 212°F. Code 21 *T.C.1/T.C.
Parameter setting 5-17 Code Display Function Temperature compensation functions Function detail X Y Z Default values 20 *T.R.°C Set reference temp. Use >, ^, ENT keys to set value 25 °C 21 *T.C.1 Set temp. coef. 1 Adjust compensation factor for mA1 2.1 % output, if set to TC in section 5-2-5. per °C Set value with >, ^, ENT keys *T.C.2 Adjust compensation factor for mA2 2.1 % output, if set to TC in section 5-2-5.
5-18 Parameter setting 5-3-4. mA output functions Code 30 *mA Select 4-20mA or 0-20mA according to associated equipment (recorders, controllers etc.) Code 31 *OUTP.F Note: For resistivity measurement, read resistivity in stead of conductivity. Output mA1 Conductivity linear (terminals 61&62) Conductivity with 21 point output table. (The table can be configured to give an output linear to concentration, see example at the end of this page).
Parameter setting 5-19 Code Display Function Function detail X Y Z Default values mA output functions 30 *mA mA output range mA1 = 0-20 mA 0 1.1 mA1 = 4-20 mA 1 4-20 mA2 = 0-20 mA 0 mA2 = 4-20 mA 1 4-20 31 *OUTP.F mA output functions Calculated value (Service Code 58) 0 0 1.1 Meas. conductivity linear 1 1 Cond.1/2 Meas. conductivity table 2 2 Meas. temperature 3 3 T1-T2 4 4 Direct/reverse action For rising signal, set for increasing mA out.
5-20 Parameter setting 5-3-5. Contact outputs Code 40 *S1, *S2 Process relays can be set for a variety of alarm and control function. 41, 42 *S3, *S4 and 43 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.
Parameter setting 5-21 Code Display Function Contacts Contin. 41 42 *S3 Relay 3 settings 43 *S4 Relay 4 settings Note: “FAIL” relay contact is used to indicate when the diagnostics detect a problem Function detail X Y Z Default values Calculated value 0 Meas cond/res. value cell 1 1 Cell 1 Meas cond/res. value cell 2 2 Meas temp.
5-22 Parameter setting Code 44 *D.TIME The delay 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. *SC.HYS The hysteresis is the value beyond the setpoint that the measured value must exceed before the control function will start working. For conductivity this setting is expressed in % of programmed setpoint value. *T.HYST *C.
Parameter setting 5-23 Code Display Function Function detail X Y Z Default values Contacts (continued) 44 *D.TIME Delay time Minimum relay switching time 0.2 sec. *SC.HYS Process hysteresis Minimum change of process value 2.0 % for relay reset after switching *T.HYST Hysteresis temp. Minimum temperature change for relay 1 °C reset after switching (fig. 5-3) *C.HYST Calculation hysteresis 0 45 *RANGE Proportional range When proportional control selected 10.
5-24 Parameter setting 5-3-6. User interface Code 50 *RET. 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. Code 51 *MODE The adjustment of the contact setpoints can be setup for operation in the maintenance mode. (Through the closed front cover).
Parameter setting 5-25 Code Display Function User interface 50 *RET Auto return 51 *MODE Mode setup 52 *PASS Passcode Note # = 0 - 9, where 0 = no passcode 1=111, 2=333, 3=777 4=888, 5=123, 6=957 7=331, 8=546, 9=847 53 *Err. 1. 1(2) Error setting *Err. 5. 1(2) *Err. 6. 1(2) *Err. 7. 1(2) *Err. 8. 1(2) *Err. 13. 1(2) *Err.22. 1 *SOFT SOFT FAIL CONTACT 54 *E5.LIM 1(2) E5 limit setting *E6.
5-26 Parameter setting 5-3-7. Communication setup Code 61 *HOUR *MINUT *SECND *YEAR *MONTH *DAY The clock/calendar for the logbook is set for current date and time as reference. 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.
Parameter setting 5-27 Code Display Function Communication 61 *HOUR Clock setup *MINUT *SECND *YEAR *MONTH *DAY 63-69 Code Display Function General 70 *LOAD Load defaults 71-79 Code Display Function Test and setup mode 80 *TEST Test and setup Function detail X Y Z Default values X Y Z Default values X Y Z Default values Adjust to current date and time using >, ^ and ENT keys Not used Function detail Reset configuration to default values Not used Function detail Not used IM 12D08E02-
Calibration 6-1 6. Calibration 6-1 When is calibration necessary? Calibration of conductivity/resistivity instruments is normally not required, since Yokogawa delivers a wide range of sensors, which are factory calibrated traceable to NIST standards. The cell constant values are normally indicated on the top of the sensor or on the integral cable. These values can be entered directly in service code 03 (section 5-3-1).
6-2 Calibration 6-2. Calibration procedure Press the MODE key. The legend CAL.1/CAL.2 appears, and the YES/NO key prompt flags flash. If the SETP legend appears, press NO first. MODE MΩ.cm MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD YES NO MODE CONTACTS S1 S2 ENT S3 FAIL/S4 YOKOGAWA MODE MΩ.cm YES NO Note: See section 4-5 for full display access details NO MΩ.cm YES MΩ.cm YES NO MΩ.cm Put the sensor in standard solution. Press YES. ENT Set the value using the >, , ENT key. MΩ.
Calibration 6-3 6-3. Calibration with HOLD active Press the MODE key. The legend CAL.1/CAL.2 appears, and the YES/NO key prompt flags flash. If the SETP legend appears, press NO first. MODE mS / c m MEASURE CAL 1 CAL 2 DISPLAY 1 DISPLAY 2 HOLD YES NO MODE CONTACTS S1 S2 ENT S3 FAIL/S4 YOKOGAWA MODE HOLD mS / c m YES NO Note: See section 4-5 for full display access function NO HOLD mS / c m YES NO YES HOLD mS / c m HOLD YES NO mS / c m HOLD Put the sensor in standard solution.
Maintenance 7-1 7. Maintenance 7-1. Periodic maintenance for the EXA 402 converter The EXA 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.
Maintenance 7-2 7-3. Fuse Replacement This section describes how to replace the power supply fuse. 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.
Troubleshooting 8-1 8. Troubleshooting The EXA DC402G is a microprocessor-based analyzer that performs continuous self-diagnostics to verify that it is working correctly. Error messages resulting from faults in the microprocessor systems itself are few. Incorrect programming by the user can be corrected according to the limits set in the following text. In addition, the EXA DC402G also checks the sensor to establish whether it is still functioning within specified limits.
8-2 Troubleshooting The following error message table gives a list of possible problems that can be indicated by the EXA. Table 8-1. Error Codes Code Error description Possible cause Suggested remedy E1 Polarization detected on cell Sensor surface fouled Clean sensor and calibrate Conductivity too high Replace sensor E2 Temperature coefficient out of limits Incorrect field calibration of TC Re-adjust (exceeds 0-3.
Spare parts 9-1 9. Spare Parts See Customer Maintenance Parts List.
Appendix 10-1 10. Appendix 10-1. User setting for non-linear output table (code 31, 35 and 36) Output % Output 000 005 010 015 020 025 030 035 040 045 050 055 060 065 070 075 080 085 090 095 100 signal value mA mA 0-20 4-20 0 00.4 1 04.8 2 05.6 3 06.4 4 07.2 5 00.8 6 08.8 7 09.6 8 10.4 9 11.2 10 0.12 11 12.8 12 13.6 13 14.4 14 15.2 15 0.16 16 16.8 17 17.6 18 18.4 19 19.2 20 20.0 10-2. User entered matrix data (code 23 to 28) Medium: Code 23 Temperature T1...
10-2 Appendix 10-3. Matrix data table (user selectable in code 22) Matrix, Solution Temp (°C) HCL-p (cation) selection 1 0 10 20 30 40 50 60 70 80 Data 1 0 ppb 0.0116 µS 0.0230 µS 0.0419 µS 0.0710 µS 0.1135 µS 0.173 µS 0.251 µS 0.350 µS 0.471 µS Data 2 4 ppb 0.0228 µS 0.0352 µS 0.0550 µS 0.085 µS 0.129 µS 0.190 µS 0.271 µS 0.375 µS 0.502 µS Data 3 10 ppb 0.0472 µS 0.0631 µS 0.0844 µS 0.115 µS 0.159 µS 0.220 µS 0.302 µS 0.406 µS 0.533 µS Data 4 20 ppb 0.0911 µS 0.116 µS 0.145 µS 0.179 µS 0.225 µS 0.
Appendix 10-3 10-4. Sensor Selection 10-4-1. General The inputs of the EXA transmitter are freely programmable for ease of installation. Standard 2-electrode type sensors with a cell constant of 0.100/cm and a Pt1000 temperature sensor, need no special programming. The EXA indicates a fault with a signal in the display field if there is a mismatch of sensors in the connection. 10-4-2. Sensor selection The EXA DC402G is pre/programmed to accept standard 2-electrode sensors with a Pt1000 temperature sensor.
10-4 Appendix 10-6. User setting table FUNCTION SETTING DEFAULTS USER SETTINGS Parameter specific functions 01 *SC.RES 0 SC 03 *0.10xC 0.10xC Factor C.C.1 1.000 /cm C.C.2 1.000 /cm 04 *AIR Perform zero calibration 05 *POL.CK 1 On Temperature measuring functions 10 *T.SENS 0 Pt1000 11 *T.UNIT 0 °C 12 *T.ADJ 1 None *T.ADJ 2 None Temperature compensation functions 20 *T.R.°C 25 °C 21 *T.C.1 2.1 %/°C *T.C.2 2.1 %/°C 22 *MATRX None, see 5-2-5 23 *T1°C T. range See sep.
Appendix 10-5 FUNCTION SETTING DEFAULTS USER SETTINGS Interface *RET 1 on *MODE 0 off *PASS 0.0.0 all off *Err.1.1/1.2 1 hard fail *Err.5.1/5.2 1 hard fail *Err.6.1/6.2 1 hard fail *Err.7.1/7.2 1 hard fail *Err.8.1/8.2 1 hard fail *Err.13.1/13.2 0 soft fail *Err.22 0 soft fail 54 *E5.LIM1 25 mS/cm 0.04 kΩ•cm *E6.LIM1 1 µS/cm 1 MΩ•cm *E5.LIM2 25 mS/cm 0.04 kΩ•cm *E6.LIM2 1 µS/cm 1 MΩ•cm 55 *% 0.0 Both off *%1 *0% *100% *%2 *0% *100% 56 *DISP 0 Auto ranging (SC) (2) (xx.
10-6 Appendix 10-7. Configuration checklist for DC402G Standard Configuration Options Reference for change Measured Variable(s) primary inputs Conductivity (SC) and Temp Resistivity i.s.o Conductivity conductivity range 0.000 µS/cm - 100 µS/cm any span within 0.000µS/cm - 1999mS/cm conductivity units Auto ranging µS/cm - mS/cm Choice out of fixed µS/cm or mS/cm resistivity range 0 - 19.99 MΩ•cm any span within 0.
Appendix 10-7 10-8. USP <645> Water Purity Monitoring What is USP? USP stands for United States Pharmacopeia and it is responsible for issuing guidelines for the pharmaceutical industry. Implementing these guidelines is highly recommended for companies wishing to market drugs in the US. This means that USP is important for pharmaceutical companies worldwide. This new USP, aims at the replacement of 5 antiquated laboratory tests by simple conductivity analysis. How have we accomplished this in DC402G? 1.
10-8 Appendix Setting up DC402G for USP First enable USP in service code 57. Change the setting from 0 (default) to 1 (enabled). USP warning alarms can be selected for any of the 4 relay outputs. Service codes 40 to 43 are for these alarms. Set to 2.5.1 for input one, or 2.5.2 for input two. The setpoint is the safety margin in %, and is set as described in sections 5-1-3 & 5-2-2. 3.5 3 2.5 μS/cm This activates uncompensated conductivity in the display menu. The E13 alarm feature is also enabled.
Appendix 10-9 10-9. WHAT IS DUAL CONDUCTIVITY? RETURN LINE Dual cell conductivity is a precise, comparative measurement. The EXA DC402G receives inputs from two conductivity cells located at different points in the process and compares them according to one of six programmed user-selectable formula - Ratio (a/b) Differential or linear difference (a-b) Percent passage (b/ax 100) Percent rejection {(a-b)/a x100} Deviation {(b/a) a x100} pH calculation acc.
Appendix 10-10 Error codes Code Error description Possible cause Suggested remedy E1 Polarization detected on cell Sensor surface fouled Clean sensor Conductivity too high Replace sensor E2 Temperature coefficient out of limits Incorrect field calibration of TC Re-adjust (exceeds 0 to 3.5%/ºC range) Set calculated TC E3 Calibration out of limits Calibrated value differs more than Check for correct sensor +/- 20 % of nominal value programmed Check for correct unit (µS/cm, in code 03.
Appendix 2 11-1 11. Appendix 2 QUALITY INSPECTION Quality Inspection Standards 1. DC402G Converter for Conductivity or Resistivity Scope This inspection standard applies to the DC402G Converter for Conductivity or Resistivity. 2. Inspection Items 2.1 * 2.2 2.3 2.4 2.5 2.
11-2 Appendix 2 2/3 e. Press the [>] key once. The data display will show “80” with the second digit of 0 flashing. 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 [>] key once. The data display will show “000” with the second digit of 0 flashing. b. Press the [] key seven times. The data display will show “070” with the second digit of 7 flashing.
Appendix 2 11-3 3/3 3.5 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 1 and check the data display. The value on the data display must be within the range shown in Table 3. Table 3 Resistance () of Decade Resistance Box 1 960.9 1097.3 1721.6 Temperature (°C) –10 25 190 3.6 Data Display (°C) –10 ±0.3 25 ±0.3 190 ±0.3 Resistance Indication Check Following Section 3.
11-4 Appendix 2 成 績 表 ＴＥＳＴ ＣＥＲＴＩＦＩＣＡＴＥ 製品名称 PRODUCT NAME 形名 MODEL 手配No. ORDER NO. 導電率変換器 CONDUCTIVITY CONVERTER DC402G 計器番号 SERIAL NO.
Customer Maintenance Parts List Model DC402G [Style: S2] Dual Cell Conductivity and Resistivity Converter 5 13 15 4 3 7 2 8 10 9 14 11 16 Item 1 12 Part No. Qty Description K9664CL K9215DB K9663MC K9672AV 1 1 1 1 K9672HB K9672HC 1 1 Cover Assembly Hinge pin Flat Cable Digital Assembly Analog Assembly For 115 V AC For 230 V AC K9432AH K9215DJ K9663MM 1 1 1 1 A1105EF A1103EF 1 1 Cable Gland Assembly 6 units Fuse (Time Lag Fuse) For 115 V AC Power, 0.200 A,T For 230 V AC Power, 0.
Pipe/Wall Mounting Hardware (Option Code : /U) Panel Mounting Hardware (Option Code : /PM) 7 2 8 3 3 9 4 5 6 1 3 Sun Protection Cover (Option Code: /H3, /H4) 10 Item 1 2 3 4 5 Part No.
Revision Record Manual Title : Model DC402G Converter for Dual Cell Conductivity and Resistivity [Style: S2] Manual Number : IM 12D08E02-01E Edition Date Remark (s) 1st Mar. 2007 Newly published 2nd Jul. 2007 Page 2-3: Some of E. Housing and K.
