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IM 12D08N04-01E

7-1

7. Maintenance

7.

Maintenance

7-1. Periodic maintenance for the EXA 402 converter

The EXA transmitter requires very little periodic maintenance. The housing is sealed to
IP65 (NEMA 4X) standards, and remains closed in normal operation. Users are
required only to make sure the front window is kept clean in order to permit a clear
view of the display and allow proper operation of the pushbuttons. If the window
becomes soiled, clean it using a soft damp cloth or soft tissue. To deal with more
stubborn stains, a neutral detergent may be used.

NOTE

Never used harsh chemicals or solvents . In the event that the window becomes heavily
stained or scratched, refer to the parts list (Customer Maintenance Parts List) for
replacement part numbers.

When you must open the front cover and/or glands, make sure that the seals are clean
and correctly fitted when the unit is reassembled in order to maintain the housing’s
weatherproof integrity against water and water vapor. The measurement otherwise may
be prone to problems caused by exposure of the circuitry to condensation.

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Содержание SC402G

Страница 1: ...User s Manual IM 12D08N04 01E Model SC402G Conductivity and Resistivity Converter Style S2 IM 12D08N04 01E 3rd Edition...

Страница 2: ...grounded soldering irons and wrist straps to avoid electrostatic discharge Installation and wiring The EXA analyser should only be used with equipment that meets the relevant IEC American or Canadian...

Страница 3: ...ator 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 draws attention to...

Страница 4: ...nty period Failure of components which are out of scope of warranty stated in instruction manual Failure caused by usage of software hardware or auxiliary equipment which Yokogawa Electric did not sup...

Страница 5: ...IM 12D08N04 01E 4 Preface...

Страница 6: ...3 AC power 3 8 3 3 4 Grounding the housing 3 8 3 3 5 Switching on the instrument 3 8 3 4 Wiring the contact signals 3 9 3 4 1 General precautions 3 9 3 4 2 Contact outputs 3 9 3 5 Wiring the analog ou...

Страница 7: ...1 Periodic maintenance for the EXA 402 converter 7 1 7 2 Periodic maintenance of the sensor 7 2 8 Troubleshooting 8 1 8 1 Diagnostics 8 1 8 1 1 Off line checks 8 1 8 1 2 On line checks 8 1 9 Spare Par...

Страница 8: ...pment 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...

Страница 9: ...available to allow wall pipe or panel mount ing Select an appropriate installation site to facilitate ease of operation Sensors should normally be mounted closely to the converter in order to ensure e...

Страница 10: ...0 to 120 C 0 to 250 F D Span Conductivity min 0 010 S cm max 1999 mS cm max 90 zero suppression Resistivity min 0 001 k cm max 999 M cm max 90 zero suppression Temperature Dependent on temp sensor typ...

Страница 11: ...VDC 5 Amps Status High low process alarms selected from conductivity resistivity and temperature Contact output is also available to signal Hold active Status Alarm Fail ON Alarm Fail OFF Power OFF C...

Страница 12: ...y 61 F S Repeatability 61 F S Note F S means maximum setting value of converter output K means cell constant YOKOGAWA provides conductivity sensors which cell constant are 0 1 to 10 cm 1 Temperature P...

Страница 13: ...50 milliseconds no effect More than 50 milliseconds reset to measurement I Operation protection 3 digit programmable password 2 3 Model and suffix codes Model Suffix Code Option Code Description SC40...

Страница 14: ...ronment Access is possible to the cable glands see figure 3 1 The transmitter is not mounted in direct sunlight or severe weather conditions Maintenance procedures are possible avoiding corrosive envi...

Страница 15: ...t mm Cable inlet port 21 dia holes equivalent to DIN PG13 5 cable gland A For sensor cable B For output signal C Spare can be used for contact input separately D For contact output S3 and S4 E For con...

Страница 16: ...t dimensions Unit mm Figure 3 2 Panel mounting diagram 188 174 50 200 100 M6 4 screw 135 13 224 M6 4 screw 200 35 15 70 100 10 mm dia 3 hole d Example of bracket used for pipe mounting Nominal 50 mm O...

Страница 17: ...elay settings S2 Relay settings S3 Relay settings S4 Note External wiring connection terminal size is for f2 pin 1 Always use a shielded cable with an O D of 6 to 12 mm 2 Be sure to ground the convert...

Страница 18: ...the three glands at the back for these cables 6 Replace the screen shield plate over the lower terminals WARNING Always replace the screen plate over the power and contact outputs for safety and to mi...

Страница 19: ...IM 12D08N04 01E 3 6 3 Installation and Wiring REAR GLANDS Output signals Sensor S1 S2 Power S3 FRONT GLANDS Range switch S4 FAIL Contact output Contact output Figure 3 6 System configuration...

Страница 20: ...gs are 230 VAC 50 mA 100 VAC 100 mA 115 VAC 100 mA The internal fuse is located next to the power terminals in the lower righthand corner 3 3 2 Access to terminal and cable entry Terminals 1 2 and 3 o...

Страница 21: ...cable can be fixed to the rear of the housing using a braided wire cable See figure 3 8 3 3 5 Switching on the instrument After all connections are made and checked the power can be switched on from t...

Страница 22: ...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 not activated as an alarm off The contact S4 is pre programmed for...

Страница 23: ...with fixed cables simply match the terminal numbers in the instru ment with the identification numbers on the cable ends Figure 3 9 indicates how to connect the different sensor types 11 12 13 14 15...

Страница 24: ...Pt100 PB36 NTC and 8 55k NTC 13 and 14 Normally used for the outer electrode 15 and 16 Used for inner electrode In case a 4 electrode measuring system will be used 14 and 16 should be used for the cur...

Страница 25: ...IM 12D08N04 01E 3 12 3 Installation and Wiring...

Страница 26: ...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 t...

Страница 27: ...asuring 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 t...

Страница 28: ...Service From the commissioning menu select Service by pressing YES key The display shows 000 and PASS Enter a 3 digit passcode as set in Service Code 52 to obtain access to the Service Mode NOTE See S...

Страница 29: ...pter 5 1 NO NO NO NO NO Cell contstant Temperature compensation for mA1 or mA2 DISP 2 Software release number YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO SETPOINTS RANGE SET HOLD SERVICE T...

Страница 30: ...g 5 Parameter setting Before using the SC402G Conductivity Converter you need to set its parameters to match the measurement range and operating conditions and to enable required func tions This secti...

Страница 31: ...and adjust setpoint when enabled in service menu section 5 3 service code 51 See adjustment procedure 5 2 2 Calibrate See calibration section 6 Display setting See operation section 4 Hold Manually s...

Страница 32: ...HOLD YES NO Note The HOLD feature must first be activated in the commissioning mode section 5 2 4 YES NO MEASURE M c m M c m CALIBRATE SETPOINTS RANGE SET HOLD SERVICE TEMP M c m MEASURE M c m NO YES...

Страница 33: ...ollow procedures as in section 5 2 2 For adjustments follow procedures as in section 5 2 2 Setpoint 3 and 4 when enabled in service codes 42 and 43 Setpoint analogue control output mA2 when enabled in...

Страница 34: ...ge 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 Choose from Table temperature or PI control Hold The EXA SC402G co...

Страница 35: ...ENT ENT ENT ENT ENT repeated keystrokes S c m S c m S c m S c m S c m S c m S c m S c m YES NO NO NO NO NO YES NO SETPOINTS RANGE SET HOLD SERVICE S c m MEASURE DISPLAY HOLD MODE TEMP CALIBRATE SETPO...

Страница 36: ...e Codes 40 49 ENT S c m NO YES NO Analogue control setpoint is only available when enabled in Service Code 31 NO YES S c m ENT ENT ENT ENT S c m Setpoint confirmed Return to mode commissioning Adjust...

Страница 37: ...NO NO YES SETPOINTS RANGE SET HOLD SERVICE MEASURE CALIBRATE DISPLAY HOLD MODE TEMP S c m SETPOINTS YES NO YES ENT YES NO See facing page ENT ENT ENT ENT ENT ENT ENT ENT YES NO YES NO S c m NO YES NO...

Страница 38: ...ice Code 31 ENT ENT 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 ENT Range v...

Страница 39: ...POINTS RANGE SET HOLD SERVICE MEASURE CALIBRATE DISPLAY HOLD MODE TEMP NO YES NO SETPOINTS YES NO YES NO YES YES NO YES NO YES NO YES NO YES NO HOLD deactivated return to commissioning menu HOLD YES H...

Страница 40: ...08N04 01E 5 11 5 Parameter Setting YES NO ENT HOLD HOLD HOLD HOLD HOLD ENT HOLD ENT ENT ENT ENT ENT YES Set HOLD fixed value for mA2 Set HOLD fixed value for mA1 HOLD value set return to commissioning...

Страница 41: ...rd temperature compensation From the factory the EXA is calibrated with a general temperature compensation function based on a sodium chloride salt solution This is suitable for many applications and...

Страница 42: ...ated coefficient 2 Enter matrix temperature compensation YES NO YES NO NO NO NO S c m SETPOINTS RANGE SET HOLD SERVICE MEASURE DISPLAY HOLD MODE TEMP CALIBRATE SETPOINTS NO NO NO YES NO YES NO YES NO...

Страница 43: ...rameter for SC for RES With the ENT keys ENT m c m After changing the parameter the instrument first goes into reset to load the parameter specific default values NO YES NO YES NO NO YES NO YES NO YES...

Страница 44: ...g 5 3 Notes for guidance in the use of service coded settings Note Do not enter or select any service codes not described in this manual Should you accidentally enter such a code press the MODE key to...

Страница 45: ...ll constant is mentioned on the text plate of the sensor SC211G SC8SG SC4A How to enter the cell constant of 0 0195 cm Select 0 01xC on the message display and then enter the value of 1 950 on the mai...

Страница 46: ...tem 4 Electrode measurement system Press NO to step through choice of multiplying factors on the second display 0 10xC 1 00xC 10 0xC 100 xC 0 01xC Press YES to select a factor Use ENT keys to adjust M...

Страница 47: ...g to the conductivity sensor used select the appropriate temperature sensor SC210G PB36NTC SC211G Pt1000 SC8SG Pt1000 SC4A Pt1000 Code 11 T UNIT Celcius or Farenheit temperature scales can be selected...

Страница 48: ...isplay T SENS T UNIT T ADJ Function Temperature sensor Display in C or F Calibration temperature Function detail Pt1000 Ni100 PB36NTC Pt100 8k55 8 55k NTC C F Adjust reading to allow for cable resista...

Страница 49: ...lues at the different temperatures must be entered in codes 24 to 28 Code 23 T1 T2 T3 T4 T5 C Set the matrix compensation range It is not necessary to enter equal temperature steps but the values shou...

Страница 50: ...if set to TC in section 5 2 5 Set value with ENT keys Adjust compensation factor for mA2 output if set to TC in section 5 2 5 Set value with ENT keys Choose matrix if set to matrix comp in section 5...

Страница 51: ...sensor In the case of the EXA the diagnostics are extensive and cover the whole range of possible sensor faults Code 35 36 TABLE The table function allows the configuration of an output curve by 21 st...

Страница 52: ...uctivity range EXAMPLE A bi lineair B hyperbolic 2 decades C logarithmic 2 decades D linear of output range Output 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 bi lin 0 0 1 0 2 0 3 0...

Страница 53: ...and the setpoint safety margin is adjusted for 10 then the contact closes at 0 9 2 2 1 98 microsiemens Additionaly when the water conductivity exceeds the USP limit the display shows E13 and the FAIL...

Страница 54: ...l duty cycle control Proportional frequency control Temperature alarm USP Always 0 Off Low setpoint High setpoint HOLD active Process alarm Proportional duty cycle control Proportional frequency contr...

Страница 55: ...Cond Resist LED off LED on LED off Delay time Delay time t sec Hys Fig 5 3 Delay time and Hysteresis 90 100 50 0 on t toff 90 10 50 50 10 Setpoint of output range duty cycle control Proportional rang...

Страница 56: ...2D08N04 01E 5 27 5 Parameter Setting 100 50 0 SC 0 3 s controller output of output range Time Setpoint 50 pulse frequency Maximum pulse frequency No pulses Potential range Fig 5 5 Pulse frequency cont...

Страница 57: ...that the regular maintenance is due should not shut down the whole measurement SOFT If soft set to 1 Soft fail only gives a flashing FAIL flag in the display and no pulsing contact Code 54 E5 LIM E6...

Страница 58: ...shorted Soft fail Temp sensor shorted Hard fail USP23 limit exceeded Soft fail USP23 limit exceeded Hard fail Control time out Soft fail Control time out Hard fail LCD Fail contact LCD only Maximum c...

Страница 59: ...detail Adjust to current date and time using ENT keys X Y Z Default values 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 op...

Страница 60: ...dissolved in water to give a precise concentration with the temperature stabilised to the adjusted reference temperature of the instrument default 25 C The conductivity of the solution is taken from...

Страница 61: ...NO YES S c m NO YES YES MODE Put the sensor in standard solution Press YES When the correct value is displayed press ENT to enter the change After briefing displaying WAIT the CAL END message appears...

Страница 62: ...MODE key The legend CALIB appears and the YES NO key prompt flags flash If the SETP legend appears press NO first S c m NO YES S c m NO YES HOLD YES MODE Put the sensor in standard solution Press YES...

Страница 63: ...IM 12D08N04 01E 6 4 6 Calibration...

Страница 64: ...d 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 hea...

Страница 65: ...ing error This error is 2 x Rv Rcel x 100 where Rv the resistance of the fouling layer Rcel the cell resistance NOTE Resistance due to fouling or to polarisation does not effect the accuracy and opera...

Страница 66: ...play The EXA also checks the temperature compensation factor while performing manual temperature compensation as described in section 5 2 5 If the TC factor stays within 0 to 3 5 per C it is accepted...

Страница 67: ...range Calibration out of limits Matrix compensation error Conductivity too high or resistivity too low Limits set in service code 54 Conductivity too low or resistivity too high Limits set in service...

Страница 68: ...IM 12D08N04 01E 9 1 9 Spare Parts 9 Spare Parts The appendix which follows contains the Customer Maintenance Parts List CMPL...

Страница 69: ...IM 12D08N04 01E 9 2 9 Spare Parts...

Страница 70: ...2 75 15 16 80 16 16 8 85 17 17 6 85 17 17 6 90 18 18 4 95 19 19 2 100 20 20 0 10 2 User entered matrix data code 22 to 28 Medium T1 data T2 data T3 data T4 data T5 data Code 23 Temperature T1 T5 Code...

Страница 71: ...301 mS cm 2 61 mS cm 101 mS cm 141 mS cm 182 mS cm 223 mS cm Data 3 10 ppb 0 0472 S cm 0 0631 S cm 0 0844 S cm 0 115 S cm 0 159 S cm 0 220 S cm 0 302 S cm 0 403 S cm 0 533 S cm 5 ppb 0 0502 S cm 0 065...

Страница 72: ...tant within the range of 0 008 cm to 50 0 cm 10 4 3 Selecting a temperature sensor The EXA SC402G reaches its highest accuracy when used with a Pt1000 temperature sensor This may influence the choice...

Страница 73: ...is specified as stage 1 Conductivity Limit at a given of Temperature If the water exceeds the limits of stage 1 then it can still be acceptable but requires the customer to proceed to Stage 2 and pos...

Страница 74: ...alarm S4 is triggered when the uncompensated conductivity exceeds the relevant value in the graph USP warning alarms can be selected for any of the 4 relay outputs Service codes 40 to 43 are for these...

Страница 75: ...C 1 2 1 C T C 2 2 1 C 22 MATRX None see 5 2 5 23 T1 C T range See sep table 10 2 24 L1xT1 Cond C1 See sep table 10 2 25 L2xT1 Cond C2 See sep table 10 2 26 L3xT1 Cond C3 See sep table 10 2 27 L4xT1 C...

Страница 76: ...fail Err 05 1 hard fail Err 06 1 hare fail Err 07 1 hard fail Err 08 1 hard fail Err 13 0 Soft fail Err 22 0 soft fail SOFT 0 LCD Fail 54 E5 LIM 500 mS 2 k E6 LIM 1 S 1 M 55 0 0 Both off 1 0 100 2 0...

Страница 77: ...0 1 time 0 200 s hyst 0 1 100 code 44 add contact functions none time out alarm code 47 control functions none PI on contacts code 45 34 33 Communication variables on display S cm mS cm and temp TC w...

Страница 78: ...mbly K9663FE 1 For 100 V AC K9663FF 1 For 115 V AC K9663FG 1 For 230 V AC 8 K9663MM 1 Cable Gland Assembly 9 Fuse Time Lag Fuse A1103EF 1 For 100 V AC Power 0 100 A T A1103EF 1 For 115 V AC Power 0 10...

Страница 79: ...7XL 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 K9664...

Страница 80: ...230 V AC 7 Housing K9432AH 1 Polyuretane baked finish K9215DJ 1 Epoxy baked finish 8 K9663MM 1 Cable Gland Assembly 9 Fuse Time Lag Fuse A1103EF 1 For 100 V AC Power 0 100 A T A1103EF 1 For 115 V AC...

Страница 81: ...7XL 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 K9664...

Страница 82: ...f Specifications modified p 2 3 to 2 4 Performance of Operating specifications modified p 3 2 Cable glands description of Fig 3 1 modified p 3 4 Fig 3 4 Wiring Diagram modified p 3 11 Some description...

Страница 83: ...evised as follows Model name of SC4A has been changed to SC4AJ Please make a note in your copy Page 3 10 Figure 3 9 modified Page 5 16 5 3 1 Some of parameter specific functions modified Page 5 18 5 3...

Страница 84: ...th fixed cables simply match the terminal numbers in the instru ment with the identification numbers on the cable ends Figure 3 9 indicates how to connect the different sensor types 11 12 13 14 15 16...

Страница 85: ...constant is mentioned on the text plate of the sensor SC211G SC8SG SC4A SC4AJ How to enter the cell constant of 0 0195 cm Select 0 01xC on the message display and then enter the value of 1 950 on the...

Страница 86: ...o the conductivity sensor used select the appropriate temperature sensor SC210G PB36NTC SC211G Pt1000 SC8SG Pt1000 SC4A SC4AJ Pt1000 Code 11 T UNIT Celcius or Farenheit temperature scales can be selec...

Страница 87: ...that the regular maintenance is due should not shut down the whole measurement SOFT If soft set to 1 Soft fail only gives a flashing FAIL flag in the display and no pulsing contact Code 54 E5 LIM E6...

Страница 88: ...1 time 0 200 s hyst 0 1 100 code 44 add contact functions none time out alarm code 47 control functions none PI on contacts code 45 34 33 Communication variables on display mS cm mS cm and temp TC w...

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