YOKOGAWA UV700G Скачать руководство пользователя страница 12

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<1. Overview>

1-3

IM 12K01B02-01E

Inside of the converter

Power / alarm LED

Display (Touch panel)

Power switch

Maintenance switch

Fuse

CF card insertion slot

Connectors for the detector

Signal terminals

AC power terminals

CF CARD

Содержание UV700G

Страница 1: ...User s Manual UV700G UV Analyzer ORGANIC POLLUTANT MONITOR IM 12K01B02 01E IM 12K01B02 01E 6th Edition ...

Страница 2: ...e instructions in this manual or operations in the manner not specified in this manual Any malfunction or damage attributable to any cause or causes beyond the reasonable control of Yokogawa such as natural disasters Any deterioration in appearance attributable to corrosion rust and so on Replacement of consumables YOKOGAWA SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTING FROM ANY MAL FUNCTIONS OF TH...

Страница 3: ... or for the product itself prepare it separately Be sure to use the spare parts approved by Yokogawa Electric Corporation hereafter simply referred to as YOKOGAWA when replacing parts or consumables Modification of the product is strictly prohibited The following safety symbols are used on the product as well as in this manual CAUTION This symbol gives information essential for understanding the o...

Страница 4: ...of the process to which the sensor have been exposed n In the following cases customer will be charged repair fee regardless of warranty 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 supply Failure due to improper or insufficient maintenance by user Fai...

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Страница 6: ... Dimensions and Flow Diagrams 2 5 2 6 Connection Diagram 2 10 2 7 Measurement Principle 2 11 3 Installation 3 1 3 1 Conditions for Installation 3 1 3 2 Installation Method 3 2 3 3 Piping configuration 3 4 3 4 Wiring 3 6 3 4 1 Grounding 3 6 3 4 2 Power Supply 3 6 3 4 3 Connecting Signal Lines 3 6 3 4 4 Connecting Detector to Converter 3 7 3 4 5 Connecting Float Switch Cable of Overflow Tank to Conv...

Страница 7: ...1 Signal Allocation 6 3 6 4 2 Signal Input Setting 6 4 6 4 3 Output Setting 6 5 6 4 4 Output Condition Setting 6 7 6 4 5 Time Adjustment 6 7 6 4 6 LCD Setting 6 8 6 4 7 Touch Panel Adjustment 6 9 6 4 8 Maker Maintenance Mode 6 9 6 5 Maintenance Measurement Setting 6 10 6 5 1 Measuring Range Setting for each Component 6 11 6 5 2 Setting of Decimal Place for each Component 6 12 6 5 3 Unit Setting fo...

Страница 8: ...ntact Output 7 3 7 3 2 Contact Input 7 4 7 4 Saving Data to a CF Card 7 5 8 Maintenance 8 1 8 1 Maintenance item 8 1 8 2 Maintenance of Detector 8 2 8 2 1 Cleaning Method for Measuring Cell 8 2 8 2 2 Replacement of Wiper Blade Rubber 8 4 8 2 3 Replacement of Desiccant Agent and Seal Washers for Screws 8 6 8 2 4 Replacement of Desiccant Agent in the Measuring Cell 8 7 8 3 Cleaning of Sampling Unit ...

Страница 9: ...Figure of completed pole stand mount App 2 2 App 2 3 4 Pole stand assembly App 2 3 App 2 3 5 Measuring tank assembly App 2 3 App 2 3 6 Overflow tank assembly App 2 4 App 2 3 7 Converter assembly App 2 6 App 3Piping App 3 1 App 3 1 Piping procedure App 3 1 App 4Wiring App 4 1 App 4 1 Wiring procedure App 4 1 App 4 1 1 Earth connection App 4 1 App 4 1 2 Power supply App 4 1 App 4 1 3 Cable connectio...

Страница 10: ...measurement continuity and maintainability The UV700G Ultraviolet UV analyzer is an instrument for continuous on line measurement using the same cell length modulation method as its predecessor UV400G It provides improved operability through a wide measuring range and touch screen interface high reliability and excellent maintainability FEATURES Graphic LCD with touch screen on the converter provi...

Страница 11: ... Parts 1 2 1 Unit Base Measuring Tank Overflow Tank Converter Hood optional Detector Door Display Left Side View Front View Float Switch CAUTION The stanchions illustrated are typical examples Appearance and size may vary depending on the specification ...

Страница 12: ...1 3 IM 12K01B02 01E l Inside of the converter Power alarm LED Display Touch panel Power switch Maintenance switch Fuse CF card insertion slot Connectors for the detector Signal terminals AC power terminals CF CARD ...

Страница 13: ...the display turns to the measurement display l Example of display Displaying measurement readings The display shows measurement readings 1 3 4 5 6 7 9 8 2 NO Display example Description 1 MEAS SETTING LOG DATA etc Title of display 2 2004 01 30 09 57 Clock 3 Abs CONC etc Items to be measured 4 Instantaneous values Readings 5 Conversion factors for COD etc Conversion factor 6 MAINTENANCE CAL etc Ope...

Страница 14: ...MAINTENANCE SETTING etc Title of display 2 SETTING MEAS SETTING etc Selection keys 3 CLOSE etc Switching keys l Example of display Displaying history and other information 1 2 3 NO Display example Description 1 Alarm history calibration report etc Title of display 2 Description of alarms etc Items to be displayed 3 Data list ...

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Страница 16: ...sion Conversion equation Y a bX where Y COD concentration X absorbance UV VIS Turbidity conversion Conversion equation Y a bX where Y turbidity X absorbance VIS Analog output Number of outputs 3 Functions 3 functions selectable UV absorbance VIS absorbance UV VIS absorbance COD concentration turbidity Specifications 4 20 mA DC or 0 16 mA DC isolated non isolated between channels Contact output Num...

Страница 17: ...omatic continuous wiper cleaning Operating conditions Ambient temperature 0 to 40 8C Ambient humidity 90 RH or less Installation location Flat stable place not subject to severe vibration or shock Allow pace for maintenance No dust mist corrosive gases are present Atmospheric pressure Avoid exposure to direct sunlight Good ventilation Max altitude of 2000 m Sample conditions Temperature 2 to 40 8C...

Страница 18: ...ified melamine resin baked Munsell 5PB8 1 equivalent Pole base mount type UV700G hA A Epoxy with modified melamine resin baked Munsell N1 0 equivalent Standard self supporting type UV700G hB A Polyurethane resin baked Munsell 0 6GY3 1 2 0 equivalent Construction Outdoor installation equivalent to IP54 Weight Converter Approx 5 0 kg Detector Approx 5 6 kg Pole base mount type Approx 31 kg Standard ...

Страница 19: ...e routine maintenance it is recommended that the instrument be overhauled every year by Yokogawa The table below lists parts required for overhaul Item P N Qty Description Inspection parts kit K9436CA 1 set Contents V ring A Seal washer Seal washer Roller Cell packing 2 Desiccant cell Wiper blade rubber Light source Desiccant detector Stepping motor Blind cap Case packing K9430EP K9436CB K9430ES K...

Страница 20: ...1000 1000 260 20 320 10 340 1000 500 1840 2300 42 ø9 M8 Basic Anchor Bolt Plan Maintenance Area Front Optional Hood for sun protection Float switch 20 19 18 17 16 15 No Item Description 1 Converter 2 Wiring port 3 Pole 4 Overflow tank 5 Detector 6 Drain port V 4 Rc 1 2 7 Discharge port 50A nominal tube fitting 8 Ball valve V 1 9 Ball valve V 2 10 Bypass outlet Rc 1 2 11 Blind plate 12 Measuring ta...

Страница 21: ...let 1 Sample Inlet Bypass Outlet Drain Port Discharge Port 20A nominal elbow fitting 13A nominal elbow fitting 50A nominal tube fitting Rp 1 2 female Rc 1 2 Rc 1 2 Note Drain piping should be installed so that back pressure does not develop VP13 rigid PVC pipe Piping Material ø22 ø15 soft tube VP20 rigid PVC pipe VP50 rigid PVC pipe Float Switch ...

Страница 22: ...y available Weight Approx 47 kg 350 95 95 540 1000 1000 490 20 530 1000 500 2540 2030 Maintenance Area 42 ø15 Front Float switch VP40 pipe Discharge port 2 No Item Description 1 Converter 2 Wiring port 3 Stanchion 4 Overflow tank 5 Detector 6 Drain port V 4 Rc 1 2 7 Discharge port 1 50A nominal tube fitting 8 Ball valve V 1 9 Ball valve V 2 10 11 Blind plate 12 Measuring tank 13 Sample inlet Rp 1 ...

Страница 23: ...talled so that back pressure does not develop Overflow Tank V 3 V 1 V 2 Measuring Tank Vent to Atmosphere V 4 ø22 ø15 soft tube VP40 rigid PVC pipe VP50 rigid PVC pipe Piping Material Sample Inlet Rp 1 2 female Drain Port Rc 1 2 Discharge Port 1 50A nominal tube fitting Discharge Port 2 VP40 pipe ...

Страница 24: ...on is optionally available Converter Rear 4 M6 Converter Mounting Dimensions No Item 1 Converter 2 3 4 5 6 Detector Measuring tank Detector table Overflow tank Hood for sun protection optional Pipes fittings and U bolts are included with shipment 1 2 3 4 5 6 Converter 35 20 60 60 60 60 60 320 12 5 34 5 Maintenance Area 500 Maintenance Area 500 104 175 354 5 45 330 240 Weight Approx 5 0 kg Converte...

Страница 25: ...coupler 15V 470V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1 2 Analog Output 1 Analog Output 3 Contact Input 2 Contact Output 2 Contact Output 4 Contact Output 6 maintenance status Analog Output 2 Contact Input 1 Contact Output 1 Contact Output 3 Contact Output 5 power off O 6 O 4 O 2 I 2 A 3 A 1 A 2 I 1 O 1 O 3 O 5 Empty Terminal Internal Connections Not for Use C...

Страница 26: ...easurement becomes possible by selecting the optimum cell length and calculating according to the change of cell length Rotation center of decentered cell Center of light source Center of cylinder cell Rotation center of decentered cell Center of detector Output signal Cell length θ 0 90 180 270 360 θ 0 θ 90 θ 180 θ 270 θ 360 L1 L3 L1 L1 L2 L2 L3 l Optical compensation Optical compensation is atta...

Страница 27: ...influence l How to Calculate the COD Conversion Factor If it is judged that there is obviously a linear function between the measurement concentration Xi i 1 2 n and corresponding manual analysis value Yi i 1 2 n the calibration curve formula regression formula is expressed as follows Y a bX The gradient of this regression line X axis b and the Y axis segment b can be calculated by using the measu...

Страница 28: ...r supply system drainage facilities and a power supply are provided Install the unit in a place that is well ventilated free from dirt or dust and where no corrosive gases will be generated Install the unit in a place that is free from strong vibration or ferromagnetic fields Install the unit where enough space is provided for conducting routine inspections and maintenance Secure the unit using an...

Страница 29: ...f supporting type UV700G B A Secure the base with the reference bolts Refer to 3 3 and 3 4 for piping and wring Unit mm 490 20 240 60 265 160 285 350 100 100 550 150 400 87 400 20 530 665 192 320 1464 Base Measuring tank Overflow tank Converter Hood optional Detector Wing nuts 4 points 4 ø15 ...

Страница 30: ...nt type UV700G A A Assemble the base measuring tank overflow tank and converter as guided in the Appendix Secure the base with the reference bolts Unit mm Hood optional Converter Overflow tank Measuring tank Base Secure with M8 bolts 4 points Wing nuts 4 points Detector ...

Страница 31: ...ominal 4 Overflow outlet 2 Elbow fitting 20 dia nominal 5 Drain outlet Rc 1 2 female 6 Discharge Tube coupling 50 dia nominal Overflow tank Overflow line 2 Overflow line 1 Sample line Bypass line Sampling pump Drain line Discharge line Measuring cell Air release 4 3 1 2 5 6 V 1 V 3 V 2 V 4 Refer to the table below for the diameter for piping Piping description Diameter of piping when hard PVC pipi...

Страница 32: ...ge point each piping diameter should be larger than that indicated above Ensure that the waste water piping overflow piping 1 and 2 and drain piping have sufficient gradient to allow drainage from the outlet of each pipe Ensure that the end of each piping is not immersed in water When using soft PVC piping use the braid reinforced flexible PVC pressure resistant type It is useful to use removable ...

Страница 33: ...r cord to the power source according to 2 6 Connection Diagram Use a power cable of size 1 25 mm2 AWG16 or larger Connect a surge absorber or noise killer in parallel to the power line in order to prevent electric power noise 3 4 3 Connecting Signal Lines Connect the signal lines according to the signal table Use double shield cables for current output signal lines The shield should be grounded at...

Страница 34: ...d terminal of shield line with a screw M3 to the screw hole under the connections CN1 and CN2 CN1 2 pin connector CN2 4 pin connector Securely fasten the round terminal of shield line with a screw M3 Detector cables Converter 3 4 5 Connecting Float Switch Cable of Overflow Tank to Converter Run the float switch cables of the overflow tank through the cable clamps at the lower left of converter cas...

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Страница 36: ...ter from the underwater pump or the header 6 Open valve V 1 gradually until sample water runs out of the overflow outlet 1 of overflow tank If the sample water does not run out of the overflow outlet 1 even when the valve V 1 is fully opened then close valve V 2 gradually to adjust the flow from the overflow outlet 1 7 Ensure that sample water overflows from the 2 upper notches of the inner tank o...

Страница 37: ... until the measured values become stable for about 60 minutes CAUTION Never touch the cell or directly view the UV lamp of the detector when you check the unit operation 2 Set the clock Refer to 6 4 5 Time Adjustment 3 Change the setting as necessary Refer to 6 Functions 4 Calibrate the unit CAUTION Calibration should be performed after the measured value becomes stable Before the calibration perf...

Страница 38: ...aintenance switch 3 Turn OFF the POWER switch 4 Clean the overflow tank and measuring tank Refer to 6 6 Maintenance Action 5 Clean the cell of converter Refer to 3 3 Piping configuration 4 4 Restarting Operation 4 4 1 For Shut Down within 7 Days Follow the procedure of 4 2 Starting Operation 4 4 2 For Shut Down over 7 Days 1 Follow the procedure of 4 1 Preparation for Operation 2 Follow the proced...

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Страница 40: ...rm calibration by operating the zero button Common span calibration Common span calibration of UV VIS using the exclusive common span calibration solution Put the span calibration solution in the calibration tank After setting the calibration value of UV VIS and the measurement has stabilized perform calibration by operating the span button If performing either one of calibrations set the span cal...

Страница 41: ...urement error also becomes larger Whenever diluting the span calibration solution make sure to dilute by adding distilled water When disposing of the common span calibration solution follow the rules and regulations in your country area As the solution is colored we recommend disposing of it by diluting with tap water unless otherwise specified Store the common span calibration solution ampoule in...

Страница 42: ...g and compound the calibration solution Measurement full scale range Qty of calibration solution ampoule Concentration of calibration solution when diluted with 2 L Calibration solution 0 1 Abs to 1 0 Abs 10 m 1 to 100 m 1 1 UV 0 690 Abs 69 0 m 1 VIS 0 880 Abs 85 0 m 1 1 1 Abs to 2 5 Abs 110 m 1 to 250 m 1 2 UV 1 380 Abs 138 0 m 1 VIS 1 760 Abs 170 0 m 1 2 6 Abs to 5 0 Abs 260 m 1 to 500 m 1 4 UV ...

Страница 43: ...ne all the way around the ampoule 3 Break the ampoule Hold the ampoule and break off the top part Be careful not to spill the solution Hold the bottom part of ampoule on the table 4 Pour the contents from the ampoule into a 2 L measuring flask that was cleaned using zero solution in advance Squeeze the ampoule several times Cleaning bottle Dissolve the solution left in the ampoule by adding zero s...

Страница 44: ...ccuracy shall be within 1 mg Cleaning bottle 1 1 Determine the requirement of acid potassium phthalate from the following table according to the measurement range Requirement of acid potassium phthalate when compounded in 2 L Concentration of span calibration solution Light absorption when the temperature of calibration solution is 25 8C absorption factor Light absorption when the temperature of c...

Страница 45: ... to 5 3 Calibration Screen Display UV VIS CAL screen Preparation Plastic bucket 1 diameter approximately 30 cm Zero solution distilled water approximately 3 L Calibration tank 1 2 L Measuring flask 1 Cleaning bottle 1 Calibration procedure 1 Press UV VIS on the CALIBRATION screen of converter Calibration item UV VIS 2 Clean the attached calibration tank with zero solution thoroughly and pour the z...

Страница 46: ... contaminated heavily clean the cell unit by referring to 8 2 1 Cleaning Method for Measuring Cell CAUTION Do not spill any solution on the base of the cell rotary shaft V ring seal part 6 After cleaning the cell unit dip the cell in the calibration tank Allow the solution to adhere by shaking from side to side for several times 7 Press the button for ZERO VALUE for UV on the UV VIS CAL screen The...

Страница 47: ...2 Press YES to start the zero calibration The Calibrating screen is displayed After calibration the Calibration finished screen is displayed 13 Press YES The zero calibration value for UV VIS is updated 14 The common zero calibration is complete If performing the common span calibration subsequently start the common span calibration with the detector still in the zero calibration tank If finishing...

Страница 48: ...ibration procedure 1 Press UV VIS on the CALIBRATION screen of the converter Calibration item UV VIS 2 Clean the attached calibration tank with zero solution thoroughly pour approximately 100 mL of span solution in the 2 L measuring flask which is prepared by following 5 4 1 How to Prepare Calibration Solution and clean the tank inside Pour approximately 100 mL of span solution Clean the tank insi...

Страница 49: ...he cell unit using the common span solution in the cleaning bottle CAUTION Do not spill any solution on the base of cell rotary shaft V ring seal part 6 After cleaning the cell unit with the common span solution dip it in the calibration tank Allow the solution to adhere by shaking from side to side for several times 7 Press the button for SPAN VALUE for UV on the UV VIS CAL screen The screen chan...

Страница 50: ...ration solution with the numeric keypads and press SET Input range 0 000 Abs to 5 000 Abs or 0 0 m 1 to 500 0 m 1 The screen returns to the UV VIS CAL screen 11 After waiting for 3 minutes and confirming that the measurement value is stabilized press SPAN The Start span cal screen is displayed 12 Press YES to start the span calibration The Calibrating screen is displayed After calibration the Cali...

Страница 51: ...1 Press UV VIS from the CALIBRATION screen of converter Calibration item UV VIS 2 Clean the attached calibration tank with zero solution throughly pour approximately 100 mL of the span calibration solution of acid potassium phthalate from the 2 L measuring flask which is prepared by following 5 4 1 How to Prepare Calibration Solution and clean the tank inside Pour approximately 100 mL of span solu...

Страница 52: ...he cell unit using the cleaning bottle containing the individual span solution Clean the cell unit using the cleaning bottle containing the individual UV span solution CAUTION Do not spill any solution on the base of the cell rotary shaft V ring seal part 6 After cleaning the cell unit with the individual span solution dip in the calibration tank Allow the solution to adhere by shaking from side t...

Страница 53: ... press SET The screen returns to the UV VIS CAL screen 11 After waiting for 3 minutes and confirming that the measurement value has stabilized press SPAN The Start span cal screen is displayed 12 Press YES to start the span calibration The Calibrating screen is displayed After calibration the Calibration finished screen is displayed 13 Press YES The span calibration value for UV VIS is updated VIS...

Страница 54: ...oximately 10 g of kaolin clay into the 500 mL beaker add the 300 mL of water and 0 2 g of sodium diphosphate decahydrate designated by JIS K 8785 and stir hard using the magnetic stirrer for approximately 3 minutes Pour the solution into the 1000 mL measuring cylinder lid is available add the water to the 1000 mL gauge line put on the lid and stir hard for approximately 1 minute After leaving the ...

Страница 55: ...2 TURB turbidity Span Calibration MEAS screen CALIBRATION screen CAL UV VIS Refer to 5 3 Calibration Screen Display TURB CAL screen Perform the TURB span calibration after finishing the common zero calibration and the common span calibration Preparation Calibration tank 1 Span calibration solution 2 L measuring flask Cleaning bottle 1 Calibration procedure 1 Press TURB on the CALIBRATION screen of...

Страница 56: ...and clean the cell unit using the TURB span solution in the cleaning bottle Clean the cell unit using the TURB span solution in the cleaning bottle CAUTION Do not spill any solution on the base of cell rotary shaft V ring seal part 6 After cleaning the cell unit with the TURB span solution dip in the calubration tank Allow the solution to adhere by shaking from side to side for several times 7 Pre...

Страница 57: ...r the concentration value of compounded calibration solution for TURB calibration value 9 After waiting for 3 minutes and confirming that the measurement value is stabilized press SPAN The Start span cal screen is displayed 10 Press YES to start the span calibration Calibrating screen is displayed After calibration Calibration finished screen is displayed 11 Press YES The span calibration value fo...

Страница 58: ...e functions so as to meet the customer s needs Alarm Description Reference Function Setting Sets signal reception and allocation from exterior and input and output setting during operation 6 4 Maintenance Setting Measurement setting Sets the measurement range unit and upper and lower limit for UV VIS COD and TURB turbidity 6 5 Maintenance Measurement Setting Action Checks ON OFF of motor for wiper...

Страница 59: ...ed on the MAINTENANCE screen The MAINTENANCE screen for each item appears Displayed screen MAINTENANCE screen operation buttons SETTING screen MEAS SETTING screen MEAS SETTING SETTING ACTION screen ACTION CHECK screen CHECK MEAS screen MAINTENANCE screen SETTING 1 2 screen SETTING 2 2 screen MEAS SETTING screen ACTION screen CHECK screen MAINT SETTING MEAS SETTING ACTION CHECK ...

Страница 60: ...measurement component to the analog output terminal from A 1 to A 3 Setting range UV VIS UV VIS COD TURB NONE COD ANALOG OUTPUTA 2 TURB ANALOG OUTPUTA 3 UV SIGNAL OUTPUT O 1 Sets to output either one of the following items to the output terminal of contact output from O 1 to O 4 Setting range TOTALALARM MAX COD MAX TURB MIN COD MIN TURB LAMP ERR NO SAMPLE MOTOR ERR ANALYZE ERR WARM UP TOTALALARM S...

Страница 61: ... screen appears SIGNAL INPUT SETTING 2 Press the button for EXT IN SET EXT IN SET screen appears 3 Select the setting item and press SET Setting item Description OFF Receives botton operation only I O Receives the input via contacts The screen returns back to the SIGNAL INPUT SETTING screen Setting for the system to receive the signal input is complete 4 Press the button for ADJUST TIME ADJUST TIM...

Страница 62: ...mA HOLD WARM UP OUTPUT Sets the measurement output during warm up to output by one of the settings below Setting range HOLD DIRECT PRESET 0 mA to 21 mA PRESET 4 0 mA ALARM OUTPUT Sets the measruement output during an alarm to output by one of the settings below Setting range HOLD DIRECT PRESET 0 mA to 21 mA HOLD 1 Press OUTPUT SETTING on the SETTING 1 2 screen The OUTPUT SETTING screen appears 2 P...

Страница 63: ...ues In this case the log data is the reading equivalent to the setting output value During maintenance and alarm 21 0 mA During warm up 4 0 mA The screen returns back to the OUTPUT SETTING screen Output settings during operation are complete l When setting to PRESET 1 Press the PRESET button on the lower right of screen The PRESET screen for each item appears PRESET 2 Enter the preset value with t...

Страница 64: ...rimination time of the alarm output and enter the value of setting range Press the button for MINUS DISPLAY to activate deactivate the minus display Setting item Description Initial setting ALARM DISCRIMI TIME Sets the alarm delay time to ignore the spike alarm When the time exceeds the ALARM DISCRIMI TIME the alarm is triggered and sounds continuously Set to 0 minute if you want to occur the alar...

Страница 65: ...of the LCD can be set here 1 Press LCD SETTING on the SETTING 2 2 screen The LCD SETTING screen appears LCD SETTING The LCD setting contains the following items Setting item Description Initial setting BACKLIGHTTIME PERIOD Setting Sets the auto off timer of the LCD backlight after the last touch Setting range 10 min 20 min 30 min OFF backlight is always ON 10 min BRIGHTNESS Adjustment Adjusts the ...

Страница 66: ...ferent button or when the location is misaligned adjust the touch panel 1 Press TOUCH PANELADJUSTMENT on the SETTING 2 2 screen The TOUCH PANELADJUSTMENT screen appears TOUCHPANEL ADJUSTMENT 2 Press the area indicated by the arrow After completing the adjustment the screen returns back to the SETTING 2 2 screen 6 4 8 Maker Maintenance Mode As this mode is for the YOKOGAWA service personnel it is n...

Страница 67: ...lue Setting rage 0 to 3 Y a bX Set the COD conversion factor a and b by calculating from UV aVIS MAX ALARM VALUE Set the upper limit of COD alarm value MIN ALARM VALUE Sets the lower limit of COD alarm value MEAS RANGE DECIMAL PLACE Y a bX MAX ALARM VALUE MIN ALARM VALUE UNIT Sets the measurement range Setting rage 0 1 to 9999 9 Sets the decimal place of the measurement value Correction is possibl...

Страница 68: ... component screen appears The screen shows an example for UV MEAS RANGE 2 Enter the numeric setting range and press SET The screen returns back to the MEAS SETTING for each measuring component screen The measuring range setting for each measuring component is complete Perform the same procedure to set the measuring range for the other components CAUTION Set the measuring range so as not to exceed ...

Страница 69: ...ING for each measuring component screen The decimal place setting for each measuring component is complete Perform the same procedure to set the measuring range for the other components CAUTION The decimal place for UV αVIS is the same as that for UV 6 5 3 Unit Setting for UV VIS and UV αVIS MEAS screen MAINTENANCE screen MAINT MEAS SETTING Refer to 6 5 Setting Screen Display for each Measuring Co...

Страница 70: ...e not changed Perform settings and calibration again If the unit is changed while measuring digits of saved data may be lost Make sure to change the unit at the beginning of operation 6 5 4 Setting of Turbidity Correction Factor MEAS screen MAINTENANCE screen MAINT MEAS SETTING Refer to 6 5 Setting Screen Display for each Measuring Component VIS MEAS SETTING screen MEAS SETTING screen VIS The turb...

Страница 71: ...OD MEAS SETTING screen TURB MEAS SETTING screen MEAS SETTING screen COD TURB Here describes how to set the COD conversion factor from UV αVIS and Turbidity correction factor Refer to How to Calculate the COD Conversion Factor 1 Press the button for y a bx on the COD or TURB MEAS SETTING screen The CORRECTION FACTOR screen appears The screen shows an example for COD a x xx b x xxx Correction factor...

Страница 72: ...htmost number 5 Enter the value b with the numeric keypad and press SET Input range 0 1 to 9999 9 When the decimal place is set to 1 digit the decimal place increases according to the setting digits The screen returns back to the y a bx screen for each measuring component The setting of the conversion factor and measurement correction factor are complete 6 5 6 Setting of MAX Alarm Value for COD an...

Страница 73: ... screen MAINT MEAS SETTING Refer to 6 5 Setting Screen Display for each Measuring Component COD MEAS SETTING screen TURB MEAS SETTING screen MEAS SETTING screen COD TURB Here describes how to set the lower limits of the COD and TURB alarm values 1 Press the button of the measuring component on the COD or TURB MEAS SETTING screen The MEAS SETTING screen for each measuring component appears 2 Press ...

Страница 74: ...t and press SET The screen returns back to the TURB MEAS SETTING 2 2 screen Unit setting for turbidity is complete NOTE It is common to set deg when the calibration solution is PSL mg L when the calibration solution is kaolin and NTU when the calibration solution is forumajin 6 6 Maintenance Action This function performs operations using the operating buttons Action Description WIPER MOTOR Check t...

Страница 75: ...ll be reset and the screen will not return to the MEASUREMENT screen until about 2 hours have elapsed Note that the screen will return to the MAINTENANCE screen and automatically the wiper motor and UV lamp will be turned on if no buttons are pressed for 30 minutes on the MAINTENANCE ACTION screen When any button is pressed within 30 minutes the timer will be reset and actions will be performed as...

Страница 76: ...ON 6 7 2 Individual ID Setting 1 Press the SET ID on the CHECK UNIT INFORMATION screen The INDIVIDUAL ID SETTING screen appears SET ID 2 Enter the ID number with the numeric keypad and press SET Input range 00000000 to 99999999 NOTE CLEAR Clears all input numeric values BACK Clears the rightmost number The screen returns back to CHECK UNIT INFORMATION screen 6 7 3 External Input Output Check MEAS ...

Страница 77: ... ON and contact is ON when power is OFF O 6 During maintenance check when the switch is OFF during maintenance CAUTION Remove the wirings of the unit before checking the contact action as it may affect the external measuring instruments 6 7 4 Check Analog Input MEAS screen MAINTENANCE screen MAINT CHECK Refer to 6 3 Maintenance Screen Display CHECK screen The sensor analog input transmitted from t...

Страница 78: ... Output 6 8 Data Check Items for the data check are as follows Items for data check Description LOG DATA check LOG DATA deletion Checks the previous data readings numerically Approximately 11 days can be saved for the value of 1 minute and approximately 13 months can be saved for the value of 1 hour Deletes all of the log data GRAPH display Checks the previous readings of data using a graph CAL RE...

Страница 79: ...G DATA MIN data when the number of seconds is 00 Maximum data approximately 11 days HOUR data when the number of minutes is 00 Maximum data approximately 13 months The following marks are displayed for the data during the action If multiple actions are overlapping they are displayed in numerical order 1 During maintenance 2 During warm up 3 During alarm NOTE DELETE Deletes the all of the log data ...

Страница 80: ...ion MEAS screen DATA screen DATA Refer to 6 8 Data Screen Display 1 Press the LOG DATA on the DATA screen The LOG DATA screen appears LOG DATA 2 Press the DELETE on the LOG DATA screen The Delete all data screen appears 3 Press YES The screen returns back to the LOG DATA screen Log data deletion is complete NOTE When executing a deletion on the LOG DATA MIN screen all MIN log data deleted When exe...

Страница 81: ...mponent to be checked The GRAPH screen appears UV NOTE START TIME DATE Changes the start time of the graph Switches to the previous and next data SET Changes the range of vertical and horizontal axes l Changing the start time of the graph 1 Press the START TIME DATE The CALL TIME MIN DATE screen appears 2 Select the hour to be changed and set the number by using m and After entering the number pre...

Страница 82: ...days 30 days indicate the HOUR data 6 8 4 Calibration Report Check MEAS screen DATA screen DATA Refer to 6 8 Data Screen Display The calibration report can be checked here 1 Press the CAL REPORT on the DATA screen The SELECT COMP screen appears The screens show examples for UV CAL REPORT 2 Select the measurement component to be checked UV The CAL REPORT screen appears Up to 20 calibration dates an...

Страница 83: ...o display press to go back to the SELECT COMP screen 6 8 5 Calibration Report Deletion MEAS screen DATA screen DATA Refer to 6 8 Data Screen Display 1 Press the DELETE on the CAL REPORT screen The CAL REPORT screen appears DELETE 2 Press YES The screen returns back to the CAL REPORT screen Calibration report deletion is complete CAUTION Though all of the calibration report is deleted the latest ca...

Страница 84: ...RD 2 Press SAVE CF The CF card transfer screen appears SAVE CF 3 Confirm that the CF card is inserted and press YES The transferring screen appears When the transfer is complete the screen returns back to the CF CARD menu screen 6 8 7 CF Card Initialization MEAS screen DATA screen DATA Refer to 6 8 Data Screen Display The CF card can be initialized here 1 Press the CF CARD on the DATA screen The C...

Страница 85: ...36 CF Otherwise proper operation is not guaranteed 6 9 Alarm An alarm is triggered when a malfunction occurs in the unit or the measurement value exceeds the upper or lower limit Refer to 9 1 Table of Status and Operation Items regarding alarm are as follows Items of alarm Description Alarm Check 6 9 1 Performs a check during the alarm Alarm Stop 6 9 2 Stops all alarms during the alarm Alarm Histo...

Страница 86: ...n is displayed ALARM NOTE RESET Stops the alarm CAUTION If an instant alarm is not triggered the ALARM button is not displayed 6 9 2 Alarm Stop 1 Press the ALARM on the MEAS screen main screen The ALARM screen appears and the alarm information is displayed ALARM 2 Press RESET The alarm stop screen appears 3 Press YES The screen returns back to the ALARM screen Alarm stop is complete ...

Страница 87: ...he information when the alarm was triggered is shown and if OFF is displayed the information when the alarm was released is shown ALARM REPORT NOTE DELETE Deletes the alarm history 6 9 4 Alarm History Deletion MEAS screen DATA screen DATA Refer to 6 8 Data Screen Display 1 Press the ALARM REPORT on the DATA screen The ALARM REPORT screen appears ALARM REPORT 2 Press DELETE The alarm history deleti...

Страница 88: ...agram of input and output The input output terminal diagram is shown below Input output terminals are the green terminals under the converter Not for use Terminal No 1 2 3 4 5 6 7 9 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Not for use Terminal table CAUTION Do not connect the signal line to terminals No 15 and 16 as they are connected internally 0 08mm2 to 1 5mm2 AWG28 to AWG16 T...

Страница 89: ...bs 0 mg L 0 mg L 1 Abs 1 Abs 1 Abs 100 mg L 100 mg L l Measurement item and analog output range example of 0 to 16 mA output Measurement item UV VIS UV VIS COD TURB turbidity Range example 0 mA output 16 mA output 1 Abs 1 Abs 1 Abs 100 mg L 100 mg L 0 Abs 0 Abs 0 Abs 0 mg L 0 mg L 1 Abs 1 Abs 1 Abs 100 mg L 100 mg L Allocations for measurement analog output terminals are as follows Specifications ...

Страница 90: ... COD measurement value COD MAX ALARM VALUE continues longer than the specified alarm time short circuit OFF when the status COD measurement value COD MAX ALARM VALUE continues longer than the specified alarm time open MIN COD Arbitrary setting Indicates the lower alarm limit for COD ON when the status COD measurement value COD MIN ALARM VALUE continues longer than the specified alarm time short ci...

Страница 91: ... load connect the spark killer surge absorber AC or DC load diode DC load etc in parallel to prevent noise a contact output OFF normally open ON during operation short circuit Refer to 6 4 1 Signal Allocation 7 3 2 Contact Input This unit is equipped with contact inputs as shown below They are enabled when set to the contact point Item Description Input timing NO SAMPLE FLOAT SWITCH Detects NO SAM...

Страница 92: ... CF Card This unit enables the transfer of saved internal data using a CF card and the verification of the data on a PC etc The CF card is available optionally CAUTION Make sure to use the CF card produced by YOKOGAWA We cannot guarantee normal operation when using other products The file system of this unit is FAT FAT32 and NTFS are not accepted l How to save to a CF card Refer to 6 8 6 CF Card T...

Страница 93: ...IS COD COD TURB TURB UV VISL UV aVIS DataStat Data status determined by each bit 1 AlmUV UV data alarm determined by each bit 2 AlmVIS VIS data alarm determined by each bit 2 AlmCOD COD data alarm determined by each bit 2 AlmTURB TURB data alarm determined by each bit 2 AlmUVVIS UV aVIS data alarm determined by each bit 2 The data is in hexadecimal notation Convert the hexadecimal notation to bina...

Страница 94: ...000 0000 0000 0000 0000 0110 is obtained 2 Apply the binary notation value to the bit table from the left Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Binary notation value 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 Hexadecimal notation value 0 0 8 0 0 0 0 6 1 in binary notation is ON Data status is as follows Bit23 alarm 007 power ...

Страница 95: ...MM DD HH MM SS year month date hour minute second CalbNo Calibration No M manual calibration A automatic calibration CalbStat Calibration result OK NG CalbConc Calibration value CoefﬁZero Zero calibration coefﬁcient CoefﬁSpan Span calibration coefﬁcient SPAN CSV UV UV data VIS VIS data TURB TURB turbidity data CAUTION If the names of files or folders are the same they shall be overwritten RAMDATA ...

Страница 96: ...l replacement yearly Replacement of seal washers Periodical replacement yearly Replacement of V rings Periodical replacement yearly Replacement of gear Periodical replacement yearly Replacement of cell When dirt can be seen When it is damaged Replacement of case packing Periodical replacement yearly Control unit Replacement of battery for clock Periodical replacement every 3 years Replacement of s...

Страница 97: ...uch other parts of the unit Before performing the work confirm that the UV lamp is not illuminated The UV lamp should not be viewed directly when it is illuminated as it may damage your eyes If the MAINTENANCE ACTION screen is not touched backlight is not turned on for about 2 hours the screen will return to the MEASUREMENT screen When the screen is touched once and the backlight is turned on the ...

Страница 98: ...rned on if no buttons are pressed for 30 minutes on the MAINTENANCE ACTION screen When any button is pressed within 30 minutes the timer will be reset and actions will be performed as specified on the screen until 30 minutes have elapsed 6 Wipe off the rotating cell to remove contamination with a clean wet cloth by moving it up and down lightly Wipe to remove contamination by moving up and down Wi...

Страница 99: ...e it by pulling inward and downward Wiper blade Wiper blade rubber Sponge 5 Insert the new wiper blade rubber in the reverse order to step 4 Ensure a correct installing direction so that the wiping parts or the wiper blade rubber are located in the direction of cell rotation when viewing from the bottom Sponge Wiping part of wiper blade rubber Direction of cell rotation Sponge Wiping part of wiper...

Страница 100: ...otor and UV lamp may turn ON Clean the wiper within a few minutes If operating the wiper without any solution for a long period of time it may damage the cell If the MAINTENANCE ACTION screen is not touched backlight is not turned on for about 2 hours the screen will return to the MEASUREMENT screen When the screen is touched once and the backlight is turned on the timer will be reset and the scre...

Страница 101: ...iver Remove the 4 screw covers from the upper part of detector Upper part of detector 5 Take the old desiccant agent and replace with the new one attached with this unit square type 5 pieces in 1 set Remove the dirt from the surface of new desiccant agent and put in the detector with the film surface facing downward 6 Remove the screws and replace the seal washers between the screw and case 4 piec...

Страница 102: ...ove the detector from the measuring tank 4 Lightly wipe off moisture adhered to the measuring cell with soft cloth 5 Remote the 2 brackets from the detector The following description is the replacement method for the desiccant agent of the light source cell Replace the desiccant agent on the detector side by following the same procedure Bracket 6 Remove the screw Screw 7 Remove the cell plate D Ce...

Страница 103: ...ant agent and adhere on the center part of the cell plate C Before adhesion brush off the powder on the desiccant agent Desiccant agent adhere 12 Insert this block into the cell and fully tighten the screw to attach the cell packing firmly on the inside surface of cell Flat washer Spring washer CAUTION Confirm that no moisture or contamination is adhered inside the cell If there is moisture or con...

Страница 104: ...ay enter into the cell part leading to malfunction Therefore install the cell plate D again Replaced desiccant agent can be disposed of as a general waste 15 Put the detector back in the measuring tank 16 Turn ON the power switch 17 Press the ACTION button on the MAINTENANCE screen Refer to 6 6 1 Action 18 Turn the wiper motor ON and UV lamp OFF ON OFF 19 Remove the detector from the measuring tan...

Страница 105: ...uched backlight is not turned on for about 2 hours the screen will return to the MEASUREMENT screen When the screen is touched once and the backlight is turned on the timer will be reset and the screen will not return to the MEASUREMENT screen until about 2 hours have elapsed Note that the screen will return to the MAINTENANCE screen and automatically the wiper motor and UV lamp will be turned on ...

Страница 106: ...nside with tap water etc If the flow from the overflow tank to measuring tank is partially clogged remove the piping of measuring tank and clean the inside of piping with tap water 6 After cleaning the overflow tank measuring tank inner tank of measuring tank and piping set back to the original condition 7 Set the valves V 1 and V 4 to fully close and V 2 and V 3 to fully open 8 Supply the sample ...

Страница 107: ...it Inner tank of the measuring tank Body of the measuring tank 4 Remove the current plate from the inner tank of the measuring tank As the spring leg of the current plate protrudes out of the screw part on the lower part of the inner tank it can be removed upward by pressing inside Inner tank of the measuring tank Current plate Spring 5 After cleaning the inner tank of measuring tank put the curre...

Страница 108: ...30EG K9430EH K9436CD K9436CE K9436CB 1 piece 1 set 1 set 1 set 1 box 1 box 1 set When failure occurs For cell cleaning 4 pcs set For detector case 5 pcs set For detector cell 2 pcs set For 1 0 Abs 6 pcs box 2 For 2 0 Abs 6 pcs box 2 For detector s upper case 4 pcs set As needed 6 months set 6 months set 6 months set 6 months box 6 months box 6 months set 1 Should be used within 6 months after purc...

Страница 109: ...asher Seal washer Roller Cell packing 2 Desiccant cell Wiper blade rubber Light source Desiccant detector Stepping motor Blind cap Case packing K9430EP K9436CB K9430ES K9430EN K9430ER K9430EH K9436CG K9436FY K9430EG K9436GB K9436GR K9436GK 2 pcs set 4 pcs set 10 pieces 6 pieces 4 pcs set 2 pcs set 4 pcs set 1 piece 5 pcs set 1 piece 4 pcs set 1 piece Cell Detector s upper case Cell Cell Cell Cell ...

Страница 110: ...m history Common WARM UP Warm up output CELL MOTOR ERR Alarm output SENSOR COMM ERR 1 Alarm output SAMPLE LACK Instantaneous value output PIO COMM ERR 2 Alarm output POWER ON OFF Instantaneous value output BATTERY ERR Instantaneous value output LAMP ERR Alarm output UV ZERO CAL Instantaneous value output SPAN CAL Instantaneous value output VIS ZERO CAL Instantaneous value output SPAN CAL Instantan...

Страница 111: ...e is out of the calibration range When zero calibration value is within the calibration range SPAN CAL When span calibration value is out or the calibration range When span calibration value is within the calibration range COD HIGH The status measurement value MAX ALARM VALUE continues longer than the specified alarm time The status measurement value MAX ALARM VALUE continues longer than the speci...

Страница 112: ...ging of piping to the overflow tank Clean the piping 8 3 Cleaning of Sampling Unit Failure in float switch for no sample detection Replace the float switch Service call PIO COMM ERR Communication error between input output substrate and CPU substrate of converter Turn the power OFF ON This may solve the problem Poor connection of converter cables or faulty parts Connect the inside cables of contro...

Страница 113: ...1 Cleaning Method for Measuring Cell 8 2 2 Replacement of Wiper Blade Rubber Failure of detector parts Replace the faulty parts Service call VIS ZERO CAL Incompatible calibration solution Make sure to use distilled water for the calibration solution Contamination of measuring cell Clean the measuring cell Replace the wiper blade rubber when it is deteriorated 8 2 1 Cleaning Method for Measuring Ce...

Страница 114: ...of the setting value 6 5 6 Setting of MAX Alarm Value for COD and TURB turbidity Abnormal upper limit of sample water Check the sample water Incompatible calibration solution Perform zero and span calibration 5 Calibration Contamination of measuring cell Clean the measuring cell Replace the wiper blade rubber when it is deteriorated 8 2 1 Cleaning Method for Measuring Cell 8 2 2 Replacement of Wip...

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Страница 116: ...ded with the UV meter and pole stand Table 1 Components included with UV meter Component Name Specifications Quantity Operation unit UV700G operation unit Standard specification outdoor case 1 Analysis unit UV700G analysis unit 1 Overflow tank Overflow tank Float switch 1 U bolt large set M8 screw nut 2 Pipe stay set Pipe U bolt screw nut 1 Hose set 1 2 m with one touch joint 1 Measuring tank and ...

Страница 117: ...Blank Page ...

Страница 118: ...2Surrounding environment No direct sunlight to the meter Close to the water sampling point Close to a water pipe and drain facility accessible to power supply No dust mist or corrosive gas in the air Good ventilation Protected from rain and wind Surrounding temperature 0 C to 40 C Relative humidity 85 or less Stable location with few vibrations or shocks Altitude of 2000 m or less App 2 3 Installi...

Страница 119: ...ow for service and maintenance Front Unit mm Fig 2 Service and maintenance space App 2 3 3Figure of completed pole stand mount The following figure shows the completed pole stand mount Converter Hood optional Detector Measuring tank Overflow tank Mount Detector mount Earth logo Fig 3 UV700G completed pole stand ...

Страница 120: ...d U bolts M8 flat washer M8 SW M8 nut Detector mount Attach the mount 350 mm to 500 mm above the floor Mount Earth logo Fig 4 Detector mount installation App 2 3 5Measuring tank assembly 1 Attach the measuring tank included in the meter to the detector mount using four M8 3 16 bolts Make sure to locate the thicker drain of the pipe on the right looking from the front M8 3 16 bolts M8 washer Drain ...

Страница 121: ... valve installation CAUTION Make sure that Teflon tape is attached to the screw on the bottom of the measuring tank before screwing in the pipe unit 4 Insert the Y pipe into the drain on the bottom of the measuring tank and attach it with the hose clip Hose clip Air outlet Y pipe Fig 8 Y pipe installation App 2 3 6Overflow tank assembly 1 Screw the pipe unit with the valve V 2 attached into the va...

Страница 122: ...flat washers 4 400 mm Earth logo Fig 10 Overflow tank installation 3 Attach the pipe stay to the pipe unit V 2 valve attached temporally using a U bolt small M5 and then fasten the pipe stay to the pole stand using another U bolt large M8 After making sure that there is no excess pressure on the pipe unit firmly fasten the U bolt small M5 attached first U bolt large M8 SW M8 nut Tightening plate V...

Страница 123: ...Fig 12 One touch joint installation CAUTION To remove the flexible tube pull the red part of the joint App 2 3 7Converter assembly 1 Attach the converter bracket to the converter using four M6 hexagon head bolts If you want to attach the optional hood attach the components in this order 1 converter 2 converter bracket 3 hood 2 Attach the converter to the pole using U bolts large M8 Converter Conve...

Страница 124: ...ine Bypass line Sampling pump Drain line Discharge line Measuring cell Air release 4 3 1 2 5 6 V 1 V 3 V 2 V 4 Fig 14 Piping Refer to the following table for diameters of the pipes and the pipe connectors Table 3 Diameters of pipes and pipe connectors Connector name Pipe connector Nominal pipe diameter When a standard hard vinyl chloride pipe is used Sample water inlet Rp 1 2 socket 13 mm or large...

Страница 125: ...pipes with larger diameters than those mentioned in Table 3 When piping the drain pipe overflow pipes 1 and 2 and the discharge pipe slope them sufficiently so that the ends of the pipes can not be submerged in water When using a flexible vinyl tube pipe use a pressure proof vinyl tube containing blade Removable piping is recommended so that the pipes can be disconnected for periodic cleaning ...

Страница 126: ... 4 1 2Power supply Connect the power supply of the converter according to the signal table Use a power cable of 1 25 mm2 AWG 16 or more in size The surge absorbers in the power terminal block are connected in parallel to prevent noise Tighten them together with the power cable The earth must be connected for safe operation Be sure to connect the power terminals in the order of L phase E earth phas...

Страница 127: ...low tank Pass the float switch cable of the overflow tank through the cable clamp from the bottom of the converter Connect cables to the No 7 and 8 terminals on the power terminal block in the center bottom of the converter App 4 1 5Signal line connection Connect the signal lines according to the external connection wiring figure Use a 2 pin shield cable for the current power output signal line an...

Страница 128: ...let Analyzer CMPL 12K01B02 01E 1st Edition Jan 2006 YK 4th Edition Jul 2016 YK Converter Detector see page 2 1 Item Part No Qty Description 1 K9436FB 1 Fuse All Rights Reserved Copyright 2006 Yokogawa Electric Corporation Subject to change without notice ...

Страница 129: ...n 1 K9436GR 4 Cap 2 K9436CB 1 Seal Washer 4 pcs 3 K9430EG 1 Desiccant 5 pcs 4 K9436GK 1 Packing 5 K9436GB 1 Motorassy 6 K9430ES 10 Seal Washer 7 K9430EP 2 V Ring A 8 K9436CG 1 Wiper Blade Rubber 4 pcs 9 K9430ER 4 Cell Packing 10 K9436FY 1 Light Source 11 K9430EH 1 Desiccant For Cell 2 pcs 12 K9430EN 6 Roller ...

Страница 130: ...n 2 4 and 2 5 were deleted Page 8 13 partly revised in Auxiliary Parts Jul 2016 2nd Edition Page 2 5 Some parts number of Sec 2 6 Overhaul parts has been changed Page 2 7 Some error of external form dimensions corrected Page 2 8 Some error in the component list corrected Page 6 15 Number of COD correction factor expanded 1 to 5 and related screen format changed Page 8 14 P N of seal washer for ove...

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