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YOKOGAWA TB820D User Manual Download Page 67

<8.  MAINTENANCE>

8-6

IM 12B01B30-02EN 2nd Edition : June 09 , 2021-00

8.6 

LED Replacement

 CAUTION

•

  Turn off the power of TB820D before replacing the LED.

•  LED may be damaged by static electricity. When replacing the LED be sure to take 

measures against static electricity, such as using a grounded wristband.

Although the LED has a normal service life of more than three years, it is recommended that the 

LED be replaced at an interval of three years in terms of preventive maintenance. Some LEDs 

may fail within three years.
The following describes how to replace the LED.
(1)  Stop power supply to TB820D.
(2)  Remove the front cover of the detection unit by loosening the six (6) setscrews.
(3)  Loosen the 1 setscrew of LED bracket.
(4)  Rotate upward the LED bracket and remove.
(5)  Detach the cable connector from the LED bracket. 

(

See Figure 8.6)

(6)  Replace the LED bracket with a new one.
(7)  Attach the new LED bracket to the cable connector. 

(

See Figure 8.7)

(8)  Rotate downward the LED bracket to set.

(9)  Fasten the 1 setscrew to fix the LED bracket.

(10)  Fasten the six (6) setscrews on the front cover of the detection unit and attach the cover.

CAUTION

After turning on the power of the instrument, warm it up for at least 30 minutes before starting the 

measurement.

Arrange the LED as below.

Table 8.4 

LED

Part No.

Name

Description

K8003DN

LED (red light)

for -NT, 660 nm Light source

K8003DP

LED (infrared light)

for -FN, 860nm Light source

Summary of Contents for TB820D

Page 1: ...User s Manual TB820D Right Angle Scattered Light Turbidity Detector IM 12E01B30 02EN IM 12E01B30 02EN 2nd Edition ...

Page 2: ...Precautions IM 12A01G01 01EN Attached to the product printed manual FLXA402T Liquid Analyzer for Turbidity and Chlorine Installation and Wiring IM 12A01G01 02EN Online manual FLXA402T Liquid Analyzer for Turbidity and Chlorine Operation of Converter IM 12A01G01 03EN Online manual FLXA402T Liquid Analyzer for Turbidity and Chlorine Operation of pH IM 12A01G02 01EN Online manual FLXA402T Liquid Anal...

Page 3: ...in the user s manuals please contact our sales representative or your local distributor n Drawing Conventions Some drawings may be partially emphasized simplified or omitted for the convenience of description Some screen images depicted in the user s manual may have different display positions or character types e g the upper lower case Also note that some of the images contained in this user s ma...

Page 4: ...2 7 2 1 5 When Relay box for solenoid valve is included 2 7 2 2 Piping 2 9 2 2 1 System Using an Open Head Tank D3 2 9 2 2 2 A system using a Simple head tank D2 2 12 2 2 3 System Using a Pressurized Head Tank D1 2 14 2 2 4 System without a Head Tank 2 17 3 PREPARATION for OPERATION 3 1 3 1 Piping and Wiring Check 3 1 3 2 Confirming detector condition 3 1 3 3 Supplying Power and switching operatio...

Page 5: ...4 8 4 5 1 Auto sequence for wash cal 4 8 4 5 2 Start date 4 8 4 5 3 Auto Wash Calibration function and wash type 4 8 4 5 4 Auto sequence setting 4 8 5 FLXA402T sensor menu 5 1 5 1 WASH 5 2 5 2 Calibration 5 2 5 3 Detail 5 2 5 4 Reset op time 5 5 5 5 Setting 5 5 5 6 Maintenance 5 6 6 OPERATION 6 1 6 1 Turbidity measurement 6 1 6 2 Air denoising 6 1 6 3 When Sample Water Supply is Cut Off 6 1 6 4 Au...

Page 6: ...8 3 8 3 Checking and Replacing Desiccants 8 4 8 4 Pipe Cleaning 8 4 8 5 Replacing the Zero Turbidity Filter Element 8 5 8 6 LED Replacement 8 6 8 7 Fuse Replacement 8 8 8 8 Window glass replacement 8 10 8 9 Flow cell replacement 8 14 9 TROUBLESHOOTING 9 1 9 1 When an error occurs 9 1 9 2 When No Error Indication Appears 9 3 Appendix App i Customer Maintenance Parts List CMPL 12E01B30 01EN Revision...

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Page 8: ...FLXA402 to provide multiple detector measurements In addition to conventional analog output Modbus TCP Modbus RTU RS485 are available The technology of predictive maintenance prevents accidental shutdown of the factory and reduces OPEX TB820D has drastically improved maintainability and minimized maintenance time 1 1 Measurement system and structure TB820D is used with FLXA402T Liquid Analyzer for...

Page 9: ...1 00 1 2 Part Name and Functions n TB820D Turbidity detector Top cover Detection unit Flow cell Smart unit Smart unit cover Front cover Sample water outlet LED Sample water inlet Drain Fuse 1 3 Specifications See TB820D General Specification GS 12E01B30 01EN ...

Page 10: ...zer 2 m Connection cable for analyzer 3 m Connection cable for analyzer 5 m Connection cable for analyzer 10 m Connection cable for analyzer 20 m Stainless steel tag plate Pipe mounting hardware SUS Conduit adapter G1 2 3 pcs Conduit adapter 1 2 NPT 3 pcs Conduit adapter M20 1 5 3 pcs Pressurized head tank for low turbidity for 2 NTU or less Simple head tank for over 2 NTU to 10 NTU Head Tank for ...

Page 11: ...uously measure the turbidity of your samples When Sample is irradiated with light the incident light is scattered by the turbidity particle TB820D measures turbidity by using 660 nm or 860nm monochromatic light as the light source and detecting light scattered in the sample in the 90 degree direction Scattered light intensity is calculated by light source intensity turbidity and the structural par...

Page 12: ...be kept between 10 to 90 RH Prevent condensation which may occur if the sample temperature is lower than the ambient temperature Also take protective measures to prevent a sample and the tap water from freezing if necessary that provides adequate maintenance space and easy access for maintenance work and where the drain is provided n Installation Dimensions Install the TB820D s detector unit in pi...

Page 13: ...2 N4 Analog output N2 N4 Analog output N4 Analog output N4 Contact input N2 N4 Analog input N4 RS485 R Ethernet E Contact output WR TB820D Right Angle Scattered Light Turbidity Detector PG400 Pulse Generator for Clean Unit Power supply 1 1 Power terminal G on TB820D must be grounded ground resistance 100 ohm or less In case of selecting NN as Relay box for solenoid valve power supply cable connect...

Page 14: ...ector PG400 Pulse Generator for Clean Unit Power supply 1 Power supply cable C Relay box 1 Power terminal G on Relay box must be grounded ground resistance 100 ohm or less In case of selecting A5 power supply cable connects with L 101 N 102 and G 001 in Relay box 2 Connection cables are 1 m in length normally They are available with L02 L03 L05 L10 or L20 depending on the length you need 3 When su...

Page 15: ...cables of power supply by using stanchion cable rack conduit or vinyl band Unplugged cables are dangerous and may cause an electric shock CAUTION When you open the front cover make sure the screws are completely out of the screw holes and then open the front cover slowly in order not to damage the threaded parts on the housing If the threaded parts are damaged and the screws cannot be tightened th...

Page 16: ...tor cable Power cable for FLXA402T B Power supply cable C View from the bottom Figure 2 3 Wiring TB820D Smart unit side L N G For IO module For sensor modules For relay module For COM module Power cable for FLXA402T B SENCOM cable for Turbidity and chlorine A M3 screw M4 screw Figure 2 4 Wiring FLXA402T side WARNING Never let the power cable touch SENCOM cable resulting in failure to comply with s...

Page 17: ... Smart unit side the shorter one approx 50 mm to FLXA402T side Cables have no name on them so wire them by color L Black N White G Red Fasten the M3 screw L N Figure 2 8 with the tightening torque of 0 6 N m M4 screw G with 1 4 N m 2 1 3 Power supply cable C WARNING You must install external power supply switch or circuit breaker for power supply The external power supply switch or a circuit break...

Page 18: ...lse Generator for Clean Unit is supplied with the product For PG400 read PG400 User s Manual IM 19C01B05 01EN Provide wiring of Oscillator cable and Power cable for PG400 by referring to Figure 2 1 or Figure 2 2 Figure 2 3 Connect the Cable for PG400 to Detection unit not to Smart unit of TB820D Connect the connector as shown on the left in Figure 2 5 and thread it through the clamp as shown on th...

Page 19: ...urchase separately an appropriate solenoid valve Table 2 4 Requirement for sampling system Port size Valve type Max working pressure Max Working pressure differential SV1 Rc 1 2 N O 1 1 5 MPa 0 7 MPa SV2 3 Rc 1 4 N C 2 5 0 MPa 0 4 MPa SV4 Rc 3 8 N C 2 2 0 MPa 1 MPa 1 Valve closes when energized 2 Valve opens when energized Table 2 5 Example Voltage 100 V 200 V 220 V SV1 Part number B1043ET B1045ET...

Page 20: ...ple head tank D2 3 A system using a pressurized head tank D1 4 A system without a head tank Depending on the application select the appropriate system configuration and install pipes accordingly following the procedure described below 2 2 1 System Using an Open Head Tank D3 This is a typical system and the piping diagram is shown in Figure 2 20 Air bubbles in a sample are removed by an open head t...

Page 21: ...tector attach a 3 way tee or appropriate fitting corresponding to the inlet s connection size Rc1 2 or 1 2 NPT This allows switching of the sample flow and the zero water flow 3 Connect a sample supply valve to one end of the 3 way tee fitting and then connect a hose tube with sufficient diameter that provides adequate flow of sample between the valve and the head tank 4 Although the specified flo...

Page 22: ...male thread Install a fitting corresponding to the thread and connect a hose tube with sufficient diameter that provides adequate flow of sample to route the sample from the detector to a drain pipe Install the pipe so that no bends or stagnation occurs 2 As shown Figure 2 21 install the pipe so that the sample can be drained from the head tank to the drain pipe during measurement or maintenance 4...

Page 23: ...5 271 5 66 5 102 5 67 5 123 5 95 5 Drain TS socket type Nominal 20A ø26 2 ID Sample water outlet to detector Rp1 2 Sample water inlet Rc3 8 Drain Tube size ø19 ID Hose coupling Vent to the atmosphere Tube size ø19 ID Hose coupling Unit mm F3 30E ai Figure 2 22 Simple Head Tank D2 Drain Drain Valve Sample Water Inlet Drain Port Sample Water Outlet Detector Drain Valve Sample Water Tap Water Sample ...

Page 24: ...of sample If pressure exists in a sample use an appropriate tube that can withstand the pressure e g a rigid PVC tube If the flow rate of a sample exceeds 10 L min install a bypass line before the simple head tank to control the flow rate 4 Connect a fitting corresponding to the connection size and a hose tube with sufficient diameter that provides adequate flow of sample between the sample outlet...

Page 25: ...must meet the specifications maximum pressure 500 kPa sample temperature 0 to 50 C ambient temperature 5 to 55 C Any failure to meet the specifications may damage the detector or other instruments When the sample pressure is reduced by using a pressure regulator or by other means air bubbles may form in the piping In that case consider the use of an open head tank An optional pressurized head tank...

Page 26: ... flow of sample in order to prevent clogging The hose tube also should withstand the sample pressure The specified sample pressure when using a pressurized head tank is in the range of 20 to 500 kPa One example is a rigid PVC tube with nominal size of 16 22 mm OD 2 For the piping between the valve and the pressurized head tank use a 8 mm OD x 6 mm ID polyethylene tube and the corresponding fitting...

Page 27: ...ic transducer if used 3 Drain Piping This piping is for draining a sample from the measurement cell of the detector and a head tank during cleaning calibration or other maintenance 1 The drain of the detector is Rc1 2 or 1 2 NPT female thread Install a fitting corresponding to the thread and connect a hose tube with sufficient diameter that provides adequate flow of sample to route the sample from...

Page 28: ...nlet Drain Port Sample Outlet TB820D Detector Drain Valve Sample Tap Water Sample Valve Zero Turbidity Filter Sample Supply Valve Zero Water Supply Valve Tap Water Valve Drain Drain Sample Zero Water Flow Control Valve Sample Effluent Zero Water Drain Valve Other Turbidity Detectors Process Piping Figure 2 25 Piping Diagram 1 Piping of the Sample Line to the Detector This piping is for introducing...

Page 29: ...l be emptied which can cause damage to the ultrasonic transducer if used 3 Drain Piping This piping is for draining a sample from the measurement cell of the detector during cleaning calibration or other maintenance 1 The drain of the detector is Rc1 2 or 1 2 NPT female thread Install a fitting corresponding to the thread and connect a hose tube with sufficient diameter that provides adequate flow...

Page 30: ... on Manual operation Solenoid manual operation is enabled Sensor menu Maintenance Valve Pump To initialize Valve turn off the maintenance mode Auto wash Auto calibration not available 3 1 Piping and Wiring Check Confirm that the piping and wiring have been completed correctly before supplying water or power Refer to the chapter 2 for Installation and piping 3 2 Confirming detector condition Ensure...

Page 31: ...tions If necessary reconfigure parameters to enable the expected operations For details of setting data refer to 4 SETTING PARAMETERS and 5 FLXA402T sensor menu When user changes the operation parameter note down the changed data Set the appropriate parameters to suit your operation conditions 1 Display Output setting on the converter See FLXA402T Operation of Converter IM 12A01G01 03EN 2 Setting ...

Page 32: ...ve and the needle valve at the sample outlet of the detector 2 Open the sample valve to supply a sample to the head tank 3 Gradually close the bypass valve at the top of the head tank until the rate of flow from the sample outlet of the detector is in the range of 0 05 to 10 L min The rate of drainage from the bypass valve should be secured to the extent that air bubbles are removed 4 Pressure cha...

Page 33: ... red OUTPUT LED are lit on 3 Adjust the oscillator output so that it does not affect the turbidity readings Adjust the output volume of the PG400 so that the cavitation effect of ultrasonic cleaning affects the turbidity indication within 1 of the output range full scale used The volume of the output range is set to the middle at the factory setting For details on the adjustment method see the PG4...

Page 34: ...0 0 sec 4 1 3 Turbidity warning High limit 9999 1 4 1 4 Turbidity warning Low limit 10 0 1 Air denoising setting Air denoising function Disable 4 1 5 Air noise detection value 999 9 1 Air denoising hold time 30 sec Denoising release time 30 sec Cal Maint settings Turbidity value of check tool 90 0 1 4 2 1 Maint damping time constant 6 sec 4 1 3 Zero shift value 0 0 4 2 2 Correction factor 1 0 Stab...

Page 35: ...Converter setting Menu Parameter Default Reference Note Auto wash cal settings Auto sequence for wash cal Disable 4 5 1 First start Year YY year 4 5 2 Specify the last two digits of the year 20xx First start Month MM 1 month First start date DD 1 days First start hour hh 0 h First start minute mm 0 min Auto update of start date Disable TB setting Auto wash function Enable 4 5 3 Wash type Water flo...

Page 36: ...nce mode During Calibration Auto wash calibration To make the response faster under the above period set the maintenance damping time constant to a smaller value than the measurement damping time constant 4 1 4 Turbidity warning High Low limit Set the High or Low limit of the turbidity value If the value exceeds the limit a warning appears 4 1 5 Air denoising setting When the Air denoising functio...

Page 37: ...e check again Instructions for Use The air denoising function is effective in processes where turbidity changes are relatively small under normal conditions but it may not be suitable for processes where sudden changes occur often Even if sudden changes do not usually occur this function may be activated and may cause a delay in the response of the reading or output if stepwise turbidity changes o...

Page 38: ...les and dust in the flow cell Normally air bubbles and dust will run off the flow cell or disappear within a short time in a few seconds In practice first set the Air denoising hold time to a shorter time and then increase it if the function does not work satisfactorily c Denoising release time After the Air denoising hold time has elapsed the turbidimeter gives readings without any processing for...

Page 39: ...ort the calibration l Stability check allowable width Set the range over which the stability of a measured value is checked If variations of a measured value over the stabilization time are within this setpoint the measured value is judged to have stabilized l Stability checking time During calibration the stability of the measured value is constantly monitored If variations of a measured value ov...

Page 40: ... On Off See 5 3 for details 4 3 3 Operating days Set each counts of parameter enabled disabled If you want to confirm the value of operation days enable the function However even if you set it disabled the operating day counts internally See 5 3 for details 4 4 Communication setting n Sensor connection address You can change Modbus address After changing Modbus address you need to change the confi...

Page 41: ...to setup the schedule for Auto wash and Auto calibration Washing interval Repeat count of wash Calibration frequency The auto sequence starts at the setup hour of the start time at the washing interval cycle Set how many times the auto wash repeats in a sequence by setting Repeat count of wash When Auto calibration function is ON Auto sequence starts at an interval determined at Calibration freque...

Page 42: ... the status Nothing appears at a measurement mode Measurement value to Calibration menu to Sensor menu On Main screen the shortcut menus Maintenance mode dialog To go to Sensor menu Start up Main screen Sensor menu The following operation are available Auto wash Calibration sensor calibration Setting sensor setting Sensor maintenance etc 5 1 5 2 5 3 5 5 5 6 5 4 Figure 5 2 Sensor menu ...

Page 43: ...u Or on Main screen tap Calibration Calibration menu For further information about Calibration see 4 SETTING PARAMETERS When you have a password a password verification appears Upon successful confirmation Calibration screen appears For further information on the password setting see FLXA402T Operation of Converter IM 12A01G01 03EN 5 4 Password 5 3 Detail On Sensor menu tap Detail to check details...

Page 44: ...on June 09 2021 00 Figure 5 2 Sensor menu flow chart n Measurement value l Turbidity Shows the turbidity on Main screen l Current value Shows input current value of Transmitted Scattered light Light source TB820D does not support Transmitted which displays ...

Page 45: ...the window glass Water temperature above 10 C above 5 C to 10 C or below 3 C or above to 5 C or below above 0 C to 5 C or below 0 C or below If the Dried condition diagnosis is disabled a bar is displayed l Replacement Operating days Manages desiccant replacement day or operating days of Light source and wiper To reset each data go to dialog of Sensor wellness reset Press reset then the number of ...

Page 46: ...can reset each data from the dialog of Sensor wellness If you reset the operating days are reset to 0 but the replacement date is updated When you have a password the password verification appears Upon successful confirmation Reset confirmation screen appears For further information on the password setting see FLXA402T Operation of Converter IM 12A01G01 03EN 5 4 Password 5 5 Setting Sensor menu Se...

Page 47: ...sor menu Maintenance When you have a password the password verification appears Upon successful confirmation Maintenance screen appears For further information on the password setting see FLXA402T Operation of Converter IM 12A01G01 03EN 5 4 Password n Maintenance mode Switches the mode between the measurement and the maintenance For Maintenance mode See 3 Preparation for Operation n Light source O...

Page 48: ...sample line is needed 6 4 Automatic wash Automatic calibration Operation When the sampling system is correctly installed and Automatic wash Automatic calibration is properly setup on the converter setting Automatic wash Automatic calibration starts at a scheduled time during a regular operation in a measurement mode For the details about the schedule see 4 5 Auto wash calibration setting You can c...

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Page 50: ...n with the detectors or the Flow cells free from contamination when the reading is stable How to pour samples into the Flow cell Use a funnel to pour the sample into the Flow cell Pour it in the funnel After pouring the sample into the Flow cell drain the sample once Pour another sample again and measure the second sample Do not allow bubbles to enter the sample Pour the sample slowly down the sid...

Page 51: ...ivity is from factory sensitivity A Zero Calculated in zero calibration using zero water V Measuring signal This signal is calculated by ratio of scattered light current and light source monitoring current T2 Turbidity after zero and sensitivity corrections K Correction factor Determined in sensitivity corrections or 2 point sensitivity corrections B Zero shift value Determined in zero shift corre...

Page 52: ...reen contact status and mA hold status remain unchanged and the flashes After confirming that the reading is normal press the flashing to cancel calibration recovery and return to measurement mode When 1 hour has elapsed with calibration recovery state the measuring mode is automatically returned 7 2 Turbidity standards The turbidity standards are used as reference for adjusting a zero or span poi...

Page 53: ... when handling a check tool Scratches or dirt on the surface of a check tool may affect the turbidity value assigned to the block NOTE Using the supplied check tool for span calibration is not approved for US EPA applications For US EPA applications perform a 2 point calibration using standard solutions Use 2 points correction menu See 7 9 2 points correction How to install the check tool Remove t...

Page 54: ... detergent solution d After the stain comes off rinse off the washing solution with the tap water and drain the water droplets on the surface e Wipe off the residual solution on the surface with tissue paper but do not rub hard the surface CAUTION Avoid rubbing hardly regardless of the material of the cloth Do not use agents other than mild detergent for wash avoid ethanol acetone and other solven...

Page 55: ...ll 4 Allow the mixed solution to stand for 24 hours at 25 3 C 5 Bring the total volume to 1000 ml with deionized water This is a 400 NTU formazin standard stock solution and its storage life is one month To make a standard solution of the desired turbidity dilute this stock solution with deionized water n Preparing a Formazin Calibration Standard Solution To make a formazin calibration standard so...

Page 56: ...hen the Flow cell is filled with the zero water for the second time to the level which is a little higher than that of the measurement window put the top cover in place Using filtered water Open the valve for zero water and run a filtered water as zero reference Zero by light source off Selectable when the measured turbidity is 40 NTU or above Turn LED OFF from Maintenance Menu 3 Press on Main scr...

Page 57: ...nd place the clear cover and the top cover on top of the detector If you finish the calibration run the sample and turn off the maintenance mode 7 5 Slope calibration Standard solution If you perform both Zero and Slope calibration perform Zero calibration first then do Span calibration Prepare a standard solution referring to n Turbidity Standards 1 Turn on the maintenance mode 2 Press on Main sc...

Page 58: ...ver and the top cover on top of the detector If you finish the calibration run the sample and turn off the maintenance mode 7 8 Sensitivity correction Use Sensitivity correction to adjust a difference sensitivity between a standard solution and a grab sample after both Zero calibration and Slope calibration are conducted correctly Calculate the sample turbidity manually and use the value as a cali...

Page 59: ...ration in the menu list of Calibration others 5 Confirm the reading stable Press check stability 6 When a message pops saying that the reading is now stable enter the calibration value Press Next 7 Feed the solution for High point measurement into the Flow cell Wait until the reading becomes stable After it becomes stable press check stability 8 When a message pops saying the reading is now stable...

Page 60: ... is supplied to the level open the drain valve and drain the solution which has been poured Pour the solution again slowly Do not allow bubbles enter the cell When the Flow cell is filled with the standard solution to the level which is a little higher than that of the measurement window put the top cover in place 6 Confirm the reading stable Press check stability 7 When a message appears to notic...

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Page 62: ...s a reference and perform inspection maintenance at appropriate intervals Table 8 1 Inspection Maintenance Items and Recommended Intervals Inspection Maintenance Item Recommended Interval Reference section Washing of Flow cell Weekly 8 1 Washing of head tank Monthly 8 2 Calibration Monthly 7 Checking and replacing desiccants 6 months 8 3 Pipe cleaning 6 months 8 4 Replacement of zero turbidity fil...

Page 63: ...p cover Loosen the four screws that secure the clear cover and remove the clear cover Loosen the four screws that secure the Flow cell and remove the upper part of the Flow cell See Figure 8 1 Top cover rubber cover clear cover transparent Screws fixing the upper part of Flow cell 4 points Screws fixing clear cover 4 points Figure 8 1 Removing Top cover Clear cover upper part of Flow cell 6 Thorou...

Page 64: ...optional head tanks provided by Yokogawa Pressurized head tank 1 Close the sample valve 2 Loose and remove the drain plug attached to the side of the head tank to drain the sample 3 Remove the cover on the top of the head tank Wash inside the tank using a sponge or soft cloth soaked in mild detergent Pour tap water into the tank from above and rinse off thoroughly 4 Replace the drain plug and the ...

Page 65: ... completes the replacing procedure After checking or replacing desiccants allow the instrument to warm up for at least one hour before measurement so that desiccants can remove moisture inside the detector The desiccants absorb moisture from the side on which letters are printed Figure 8 3 Installing the desiccants to the front cover Arrange the desiccants as below Table 8 2 Desiccants Part No Nam...

Page 66: ...y filter to supply tap water and open the zero water drain valve after the filter to supply zero water Check for leak 8 Loosen the air vent valve on top of the zero turbidity filter until the tap water begins to leak out After the air vent tighten the valve securely 9 Allow the water to flow for at least 20 minutes to wet the filter element 10 Close the zero water drain valve after the zero turbid...

Page 67: ...ove the front cover of the detection unit by loosening the six 6 setscrews 3 Loosen the 1 setscrew of LED bracket 4 Rotate upward the LED bracket and remove 5 Detach the cable connector from the LED bracket See Figure 8 6 6 Replace the LED bracket with a new one 7 Attach the new LED bracket to the cable connector See Figure 8 7 8 Rotate downward the LED bracket to set 9 Fasten the 1 setscrew to fi...

Page 68: ... 8 7 IM 12B01B30 02EN 2nd Edition June 09 2021 00 Front cover LED bracket LED bracket Figure 8 5 LED Replacement Pinch the strap and remove the lock lever Pull out the connector Strap Figure 8 6 Disconnecting cables ...

Page 69: ...01 02JA for fuse replacement of FLXA402T Replace the fuses of TB820D and Relay box as follows CAUTION Be sure to turn off the power of the instrument before starting the fuse replacement CAUTION Before opening the front cover of the detector turn off the power to the TB820D turbidimeter Make sure that the turbidimeter is not powered before work Do not touch terminals while the turbidimeter is bein...

Page 70: ...r 2 Remove the two fuse holders See Figure 8 9 3 Replace the fuse with a new one and attach the fuse holder 4 Close the relay box cover Fuse Figure 8 9 Fuse Replacement Relay box CAUTION After turning on the power of the instrument warm it up for at least 30 minutes before starting the measurement Arrange the fuse as below Table 8 5 Fuse Part No Name Description A1633EF FUSE 1 fuse for TB820D A162...

Page 71: ...Spare parts Window glass O rings gaskets Part No Name Description K8003KS GLASS ASSY 1 window glass large 1 O ring for window glass position a and c K8003KT GLASS ASSY 1 window glass small 1 O ring for window glass position b K8003KV GLASS ASSY 1 window glass large with oscillator 1 O ring for window glass position a U1 K8003NQ Gasket 67 mm 119 mm for upper part of Flow cell K8003NR Gasket 65 mm 6...

Page 72: ...ently 1 Remove the top cover on the top of the Flow cell Loosen the four screws and remove the clear cover Loosen the four 4 screws and remove the upper part of the Flow cell See Figure 8 12 2 Wipe the inside of the Flow cell with a soft cloth 3 In order to prevent the water remaining inside the liquid tank from dripping inside the TB820D main body attach the red caps to the sample inlet pipe and ...

Page 73: ...bottom of the Flow cell 2 positions Flow cell fixing screws 6 positions Figure 8 15 Removal of Flow cell n Window glass replacement There are three window glasses See Figure 8 10 Loosen the four 4 screws two for position 2 remove the window glass and O ring and replace with a new one When the suffix code U1 is specified attach the window glass with the oscillator to the window glass position 1 Ins...

Page 74: ... secure it with a clip as shown in the figure Close the front cover of the TB820D and tighten the six 6 screws See Figure 8 17 Connect the oscillator cable at the connector Secure the oscillator cable with the clip Figure 8 17 Connecting and fixing the oscillator cable 3 Installation of the upper part of Flow cell and others 1 Install the upper part of the liquid tank Tighten the four screws Be su...

Page 75: ...ubber cover G9330DC CAP Piping cap 8 9 Flow cell replacement You can replace Flow cell of TB820D Arrange a replacement for Flow cell according to Table 8 8 Figure 8 18 shows an example of Flow cell for replacement A window glass is attached to the replacement Flow cell in advance If the suffix code U1 is selected the oscillator is attached to the Flow cell window Refer to Section 8 8 for how to re...

Page 76: ... Check the connection between the detection unit and the converter Check whether the connected sensor type matches the one in the Model and Suffix Code F Enable X520 Wash Cal box error Relay box does not work Check the connection of Relay box or configuration Enable Disable S Disable X521 Humidity sensor failure Humidity sensor does not work Open the front cover and check the cable connection of t...

Page 77: ... is found in the sampling check whether no condensation is found on Measurement window S Enable X54F Auto Cal stability time limit Detection value is not stable during auto calibration S Enable Note X of Alarm Number denotes Channel of the measurement electrode unit 1 sensor connection number 1 1 5 sensor connection number 2 1 6 sensor connection number 2 2 not required on the first FD Table 9 2 T...

Page 78: ...or sample flow set larger value of measurement time constant Measured value increased over time Inside of the detector cell is contaminated Air bubbles adhere to the surface of glass window Glass window has condensation Glass window is scratched Clean the glass window or inside wall of the Flow cell Reduce sample flow rate by controlling the valve at the outlet to higher the pressure level inside ...

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Page 80: ...tarts SV1 valve for sample closes and shut the sample feeding At the same time SV4 valve for drain opens and starts draining the sample out of the flow cell 2 After the drainage time elapses SV4 closes and SV2 valve for washing water opens and TB820D starts feeding washing water 3 During the washing time SV2 stays open SV4 stays closed 4 After the washing time elapses SV4 opens and TB820D starts d...

Page 81: ...starts Automatic wash works first See 1 to 5 in During Automatic wash 2 Automatic calibration starts without a recovery time after Automatic wash 3 When Automatic calibration starts SV4 closes SV3 valve for zero water opens and a zero water starts filling the flow cell 4 After the calibration preparation time has elapsed SV4 opens and the zero water in the Flow cell is drained once After the drain...

Page 82: ...003ED 1 Cell Assy K8003EM 1 Cell Assy for U1 with ultrasonic cleaning 6 K8003KS 1 Glass Assy 1 window glass large 1 O ring K8003KV 1 Glass Assy 1 window glass large with oscillator 1 O ring 7 K8003KT 1 Glass Assy 1 window glass small 1 O ring 8 K8003NQ 1 Gasket 67 mm 119 mm 9 K8003NS 1 Gasket 65 mm 65 mm 10 K8003NU 1 Gasket Assy One gasket each K8003NQ K8003NS 2 O rings large 1 O ring small 11 A16...

Page 83: ...2 1st Edition May 2021 YK CMPL 12E01B30 01EN Relay box for A5 1 Item Part No Qty Description 1 A1624EF 2 Fuse ...

Page 84: ...ron filter K9726EF ZERO TURBIDITY FILTER ASSEMBLY 0 2 micron filter 4 5 7 1 2 3 6 Item Part No Qty Description 1 K9008ZD 1 Filter Element 1 micron K9726EH 1 Filter Element 0 2 micron 2 K9411UB 1 Case 3 K9008ZE 1 Plate 4 K9411UD 1 O Ring 5 K9411UC 1 O Ring 6 K9411UE 1 O Ring 7 K9411UF 1 Head ...

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Page 86: ...tion Title TB820D Right Angle Scattered Light Turbidity Detector Manual No IM 12E01B30 02EN June 2021 2nd Edition Added a Model and Suffix code page 1 3 Corrected errors pages 1 3 2 7 Added a section description page 3 4 7 4 8 4 Mar 2021 1st Edition Newly published ...

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