SS300G MLSS Detector
Contents
1. of the sensor cable and the sensor main unit stainless steel is 100 MQ or more If inspection determines that 100 MO or more insulation resistance cannot be obtained replace the sensor If the inspections described in Subsection 5 2 1 to 5 2 3 do not reveal any problem it is possible that certain parts such as the light source and photo sensor have reached the end of their service life If there is a spare sensor attempt replacement of the sensor to determine whether the sensor is the cause of the problem In any event in such a case the sensor must be replaced IM 12E6C1 01E 3rd Edition Apr 17 2015 00 Customer Model SS300G EXA ss Maintenance Parts List MLSS Sensor Option Code JTJ JTA Option Code WP Jet Washing Unit Wiper Washing Unit 5 Item Part No Qty Description 1 K9432PD 1 Box Nut 2 K94320D 1 O Ring 3 K9432PE 1 Prism Assembly 4 K9432RJ 1 Nozzle For Jet Washing Unit 5 K9432SF 1 Wiper For Wiper Washing Unit All Rights Reserved Copyright O 1997 Yokogawa Electric Corporation GMPL 12E06C01 01E YOKOGAWA 4 a dd notice 3rd Edition Apr 2001 YK Yokogawa Electric Corporation Revision Information Title SS300G MLSS Sensor e Manual No IM 12E6C1 01E Apr 2015 3rd Edition Change ltem 1 2 1 to GS 12E6A1 E description Oct 2013 2nd Edition Page layouted by InDesign Revised and Corrected over all of Style 2 deletion of optional wiper cleaning WP CMPL 12E06C01 01E2. based on its standard When the customer site is located outside of the service area a fee for dispatching the maintenance engineer will be charged to the customer amp 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 Failure due to modification misuse or outside of specifications operation which Yokogawa does not authorize Failure due to power supply voltage frequency being outside specifications or abnormal Failure caused by any usage out of scope of recommended usage Any damage from fire earthquake storms and floods lightning disturbances riots warfare radiation and other natural changes O Yokogawa does not warrant conformance with the specific application at the user site Yokogawa will not bear direct indirect responsibility for damage due to a specific application O Yokogawa Electric will not bear responsibility when the user configures the product into systems or resells the product O Maintenance service and supplying repair parts will be covered for five years after the production ends For repair for this product please contact the nearest sales office described in this instruc tion manual IM
3. indicated on each core wire After connecting the cable firmly tighten the cable gland to ensure its waterproof performance For detailed wiring information see the Instruction Manual for the SS400G MLSS converter IM 12E6B1 02E or WTB10 SSU terminal box IM 12E06WO3 01E Connecting directly to the converter SS400G MLSS converter SS300G MLSS sensor 19 18 17 161514131211 G Sensor cable Connecting to a relay terminal box SS400G MLSS converter WTB10 SS1 relay terminal box SS300G MLSS sensor Dedicated extension cable Sensor cable F3201 ai Figure 3 6 Connecting the sensor cable N CAUTION When connecting the sensor cable to the converter or re ay terminal box be certain the wiring scheme is correct failure to correctly wire the sensor may result in the failure of the device IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 4 Operation gt 4 1 4 4 1 4 2 4 2 1 4 2 2 Operation Insure that the MLSS metering system is operating normally and is ready to perform desirable measurements before carrying out continuous operation This chapter describes only those items that are related to the sensor With respect to operation of the entire system refer to the SS400G MLSS Converter User s Manual IM 12E6B1 02E for details Preparation Before operating the sensor check the installation state wiring workmanship and movement Inspection of Installation and Wir
4. is expected that the sensor will be exposed to air over along period without operating clean off any contamination that is adhering to the sensor When operation is resumed for caution s sake first perform simple calibration IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 5 Maintenance gt 5 1 9 5 1 5 1 1 Maintenance This chapter describes inspection and maintenance of the MLSS sensor only With respect to the general inspection and adjustment of the measuring system Including calibration refer to the SS400G MLSS Converter User s Manual IM 12E6B1 02E It is recommended that the inspections and maintenance described in this chapter be carried out in accordance with the operational status of the individual sensor Daily Inspection Cleaning the Sensor Contamination stuck to the measuring window of the MLSS sensor blocks measurement light causing errors in the measured values Even though periodic automatic cleaning is performed when the unit is fitted with a cleaning device depending on the measuring conditions for the specific device dirt may accumulate on the device anyway Therefore visually check the measuring window section of the sensor occasionally and clean if it is contaminated Standard Cleaning Cycle The cleaning cycle depends on the measuring conditions and whether or nota cleaning device is used clean at least once every 1 to 2 months Guide to Cleaning Pull up the sensor and dip the senso
5. of text This section describes these icons NWARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury A CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices A IMPORTANT Indicates that operating the hardware or software in this manner may damage it or lead to system failure N NOTE Draws attention to information essential for understanding the operation and features AN Tip This symbol gives information that complements the current topic N SEEALSO This symbol identifies a source to be referred to IM 12E6C1 01E 3rd Edition Apr 17 2015 00 iv lt Introduction gt After sales Warranty O During the warranty period for repair under warranty carry or send the product to the local sales representative or service office Yokogawa will replace or repair any damaged parts and return the product to you O Before returning a product for repair under warranty provide us with the model name and serial number and a description of the problem Any diagrams or data explaining the problem would also be appreciated O If we replace the product with a new one we won t provide you with a repair report O Yokogawa warrants the product for the period stated in the pre purchase quotation Yokogawa shall conduct defined warranty service
6. revised to 3rd edition Oct 1998 1st Edition Newly published E f you want to have more information about Yokogawa products you can visit Yokogawa s home page at the following web site Home page http www yokogawa com an IM 12E6C1 01E 3rd Edition Apr 17 2015 00
7. the jet washing device option is available PB350G Float Type Holder PB360G Vertical Type Float Holder This type of holder incorporates the holder in a spherical shape float that rides on top of the solution to be measured This holder can handle great changes in the surface of the solution Because the float is supported by an am the measuring point does not move in the solution flow Also because of its spherical shape the sensor section does not get dirty easily This type is suitable for applications that have regular constant flow CAUTION Installation Location of Holders Guide Pipe Submersion Type etc The holder should be used in a place that is as vibration free as possible Using the holder in a place where it is affected by vibration may result in damage to the holder Installing the Sensor The sensor can be installed by incorporation in a holder or by using a drop in mounting bracket option Incorporation in Holder For incorporation of the sensor in a holder and holder installation see the concerned holder instruction manual Use care with regard to sensor orientation Taking the holder installation into consideration incorporate the sensor in the holder so that the mounting orientation mark sensor flat cut part on the sensor is parallel to the flow of the solution to be measured IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 3 Installation and Wiring gt 3 3 MLSS sensor Mounting
8. 00 lt 3 Installation and Wiring gt 3 5 Connection joint Clamp Rc1 2 or 1 2NPT Sensor cable Pipe to secure wire Bracket to hang wire Sensor cable a Pipe to secure wire Bracket to hang wire Net impregnated Soft polyvinyl chloride Wire resin hose Dedicated nut used to secure wire Clamp Dedicated nut used to secure wire Nut to secure sensor 30 mm Jet washing device Sensor mounting orientation mark flat notched section Washer Bracket to secure sensor Sensor mounting orientation mark flat notched section Without jet washing device With jet washing device F3104 ai Figure 3 4 Incorporating the Sensor 5 To attach a jet washing device connect it to the attached net impregnated soft polyvinyl chloride resin hose and use a clamp to secure it Pass one end of the hose through the wire securing pipe and then connect it to the attached connection joint and secure it with a clamp see Figure 3 4 With other than the jet washing device pass the sensor cable through the wire securing pipe 6 Once the sensor is hung attach the wire hanging bracket at any position on the drop in mounting bracket and use the U bolt to secure it When performing sensor maintenance loosen the butterfly nut of the wire hanging bracket and remove the sensor together with the hanging bracket IM 12E6C1 01E 3rd Edition Apr 17 2015 00 3 6 lt 3 Installation and Wiring gt Dr
9. 12E6C1 01E 3rd Edition Apr 17 2015 00 lt CONTENTS gt i Model SS300G MLSS Sensor IM 12E6C1 01E 3nd Edition CONTENTS IRIKOQUCNON ee i For the safe use of this equipment uuuu20nnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn en ii After sales Warranly a nnmnnn nn iv 1 A W rns e naires Soe Y FT SNP EFA YDYN A HR 1 1 1 1 Features of the SS300G MLSS Sensor uurensrensnensnennnennnennnonnnnnnnannnnnnnennnannn 1 1 1 2 Specifications PERFERPRAERTRERFIIEPEERERIUFTELTRER EERREEFENERHARFERETBURFERERHAFEGEETEPEFFFERHALTEEETEPERTEEEHRLEN 1 2 1 2 1 Standard Specifications ccsccccccceeeceeeeeeeeeeeeeeseaeesseeeeeneeeeneeesens 1 2 1 2 2 UTERO 1 3 1 2 3 External DIMensioNS ww wsewamewanewanwwanumazima zima ziwani zwa 1 3 2 Components and FUNCTIONS ooooccccccnnnncccnnnnnnnnnnnannnononnnnononcnnnnnnnnnnannnnnnns 2 1 3 Installation and Wiring es 3 1 3 1 Installation es 3 1 3 1 1 Selecting Measuring Point unsersennsnneennnennnnnnnnnnnnnnnnnnnnnn nn 3 1 3 1 2 Selecting a Holder icono 3 1 3 1 3 Installing the Sensor ka aa 3 2 3 2 uu LL Lo anaaga 3 6 3 2 1 Sensor Cable SpecificatiONS ooonoocinnnninncccnnncnnnoonconncrcncrcnnnrccnnnos 3 6 3 2 2 Connecting the Sensor Cable uerssennsnsnnnnnnnnnnnnnnnnnnnnnnnn nn 3 6 4 Opera cana acacia 4 1 4 1 A A 4 1 4 1 1 Inspection of Installation and Wiring 4es4ss nennen nennen 4 1 4 1 2 I
10. 5 2 2 5 2 3 Inspection by removing the prism assembly should not be performed more often than necessary doing so shortens the service life ofthe O ring Inspecting the Cleaning Device Inspecting the Jet Washing Nozzle When cleaning or calibrating the sensor check for clogging of the jet washing nozzle If the nozzle is clogged with dirt clean the nozzle to remove If doing so does not remove the dirt detach the nozzle tip from the nozzle main unit to replace Replacement part number K9432RJ Inspection for Failure Occurrence Sensor failure can be found by the existence of FAIL signals Should an error occur refer to the MLSS Converter User s Manual IM 12E6B1 02E for details of appropriate measures to take If the error indication continues after taking the indicated measures inspect the sensor as described below Inspecting the Prism Assembly Check for scratches or damage on the measuring window section of the prism assembly if found the prism assembly must be replaced After the prism assembly is replaced perform solution calibration Replacement part number K9432PE Inspecting the Prism Assembly Seal Section Detach the prism assembly from the sensor main unit and check for solution inside the sensor if found replace the sensor Inspecting the Insulation Performance of the Sensor Main Unit Disconnect the sensor from the converter and check that the insulation resistance between the bundle of the core 11 to 19
11. SS metering system Mode mmeotManu Publiatonno 1 Specification check FH350G Flow Through Type Holder IM 19H1C2 01E Upon taking receipt of the product unpack carefully checking that no damage has occurred during transport Each SS300G MLSS sensor is manufactured to user specifications Check to ensure that the received product was manufactured to specification and that no accessories are missing Verifica tion of specifications can be made by confirming the model code indicated on the nameplate For a description of the model codes see Section 1 2 2 Media No IM 12E6C1 01E 3nd Edition Apr 2015 YK IM 12E6C1 01E 3rd Edition Apr 17 2015 00 All Rights Reserved Copyright O 1998 Yokogawa Electric Corporation lt Introduction gt For the safe use of this equipment m Safety Protection and Modification of the Product In order to protect the system controlled by the product and the product itself and ensure safe operation observe the safety precautions described in this user s manual We assume no liability for safety if users fail to observe these instructions when operating the product If this instrument is used in a manner not specified in this user s manual the protection provided by this instrument may be impaired 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 pr
12. User s EXA ss Manual SS300G MLSS Sensor IM 12E6C1 01E vigilantplant YOKOGAWA 4 IM 12E6C1 01E 3rd Editi Yokogawa Electric Corporation r iik lt Introduction gt Introduction The SS300G MLSS Sensor is designed for use in the SS400 MLSS Metering System in combination with an SS400G MLSS Converter and Holder The SS300G MLSS Sensor uses transmitted and scattered light comparison as the measurement principle covering a wide measurement range from 500 to 20000 mg l This sensor is suited for con tinuous measurement of MLSS in activated sludge treatment processing in sewage or industrial waste treatment facilities Because the system can be used for the measurement of suspended solids in treated water this sen sor can also serve as a MLSS meter for drain treatment facilities This manual covers all of the information for handling the SS300G MLSS sensor including installa tion wiring inspection and maintenance of this product Note Description of the entire MLSS metering system is in the SS400G MLSS Converter user s manual IM 12E6B1 02E refer to the user s manual for details See the relevant manual for information on the holder that contains the SS300G MLSS sensor and the SS400G MLSS converter to which the sensor cable is connected User s Manuals for the EXA ss series SS400 MLSS metering system related equipment are as fol lows Manuals for associated equipment used with the EXA ss series SS400 ML
13. cleaning unit Bracket MS Hardware for free standing installation Choose this option if a holder is used External Dimensions Unit mm 7 10 46 gt gt e ax A pal 154 gt Cable length of 3 5 10 15 or A 20 m as standard o lt J Figure 1 2 SS300G MLSS Sensor F1201 ai IM 12E6C1 01E 3rd Edition Apr 17 2015 00 1 4 lt 1 Overview gt 600 gt max 500 gt 55 min 236 pitch 44 lt gt lt of JIS 50A 2 inch stanchion vertical Suspension wire max 5 m F1201 ai Figure 1 3 Free standing Installation Drop in Mount Bracket IM 12E6C1 01E Unit mm 3rd Edition Apr 17 2015 00 lt 1 Overview gt 1 5 600 a max 500 55 min 236 pitch 44 aa E JIS 50A 2 inch stanchion vertical Figure 1 4 Jet Washing Device Unit mm Hose for cleaning max 10 m Suspension wire Approx 271 84 e F1203 ai IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 2 Components and Functions gt 2 1 2 Components and Functions This chapter describes the external appearance of the SS300G MLSS sensor and items to note when handling the sensor Sensor main body Contains light emitting devices and a photodetector Transmitted and scattered light are detected and converted to electric s
14. g bracket option using a wire This type is appropriate for low flow speed applications Automatic cleaning can be performed using the jet washing device option however because the sensor is not held in the flow direction this holder is not appropriate for those cases that have a fast flow speed Note The drop in mounting bracket is attached upon request It is also attached when a jet washing device is requested PH8HG Guide Pipe This holder suspends the sensor in a pipe made of polyvinyl chloride resin This simple method is appropriate for applications that require more than simple mounting and that do not require automatic cleaning Installing the guide holder at about a 20 angle prevents stagnation of bubbles at the sensor measuring window section IM 12E6C1 01E 3rd Edition Apr 17 2015 00 3 1 3 lt 3 Installation and Wiring gt DOX8HS Submersion Type Holder This holder holds the sensor firmly even through the flow speed is fast and measurement can be performed at a constant measuring point Because the sensor is held at 45 stagnation of bubbles at the sensor measuring window section are prevented HH350G Well Bucket Type Holder This holder can move the sensor up and down along the angle pipe guide holder During measurement a chain is used to lower the sensor to the desired depth Even when in a deep tank maintenance can easily be performed by using a wire to lift the sensor Automatic cleaning using
15. ignals Measuring Prism assembly window section E Securing nut O ring Sensor cable Carries sensor signals to the MLSS sensor The desired cable length can be selected from 3 5 10 15 and 20 meters Securing nut Prism assembly Contains an optical system that exposes the solution to be measured to light and directs transmitted and scattered light to the sensor Name plate Contains the specific sensor constant for each sensor Figure 2 1 SS300G MLSS Sensor AN CAUTION Be careful not to scratch the measuring window section of the prism assembly If the window is scratched the sensor constant may change requiring re calibration of the solution to be measured or in the worst case replacement of the prism assembly F2001 ai Be sure not to loosen the securing nut except when replacing the prism assembly IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 3 Installation and Wiring gt 3 1 3 3 1 Installation and Wiring The SS300G MLSS sensor is used in conjunction with a drop in mounting bracket or is incorporated in a holder This chapter describes installation and wiring connection of the sensor cable for the SS300G Installation Normally the SS300G MLSS sensor is incorporated in the PH8HG guide holder DOX8HS submersion type holder HH350G well bucket type holder PB350G float type holder or PB360G vertical float holder and submerged for measuring It is also po
16. ing Wiring Insure that the sensor cables are installed correctly The terminal connected to the converter is firmly secured Maintenance calibration and cleaning can be carried out without difficulty There is no possibility of damage to the sensor cable Installation of the sensor Insure that the sensor is installed correctly The sensor is correctly attached to the holder The sensor installation orientation and submerge depth are correct The sensor can be freely and safely removed Inspecting Measurement After making measurement parameter settings and calibration operate the SS400G MLSS Converter checking that the unit produces normal measurements No error indication on the converter The indicated values on the converter are relatively close to those of recommended MLSS values Steady Operation Maintain measurement accuracy by calibrating or cleaning the sensor periodically during steady operation Details of sensor inspection and maintenance are explained in section 5 With respect to inspection and maintenance including calibration for the entire system see the SS400G MLSS Converter User s Manual IM 12E6B1 02E When Failures Occur The converter detects measurement failures and errors due to the system failure then outputs a FAIL contact signal Should a failure be detected take prompt countermeasures after consulting the User s Manual Cautions on Operation Stopping and Restarting If it
17. nsor is capable of a broad range of measurements from low to high concentration and provides stable performance over an extended period of time Because the transmitted and scattered light comparison method is used for measurement this sensor covers a wide range of measurement from 500 mg l to 20000 mg l and is suitable for the measurement of install sewage SS to return sludge MLSS as well as MLSS in aeration tanks The use of this measurement method means that the sensor is not easily influenced by changes in light source staining or coloring This sensor is not easily influenced by external light reflected from the interface Because the sensor employs a photodiode and light source that operates in the near infrared the growth of organic pollution such as photosynthesis fed algae is suppressed Also use of pulse lighting for the light source and the attachment of a visible light cut filter reduces the influence of external light In addition the optical system light source photodiode etc is designed not to be influenced by light reflected from the interface of the solution to be measured This compact and light sensor permits easy maintenance and by combining it with a variety of holders and cleaning devices maintenance frequency can be reduced Compared to conventional products this sensor is significantly smaller both in terms of physical size and weight and previously troublesome replacement of the light source is essen
18. nspecting Measurement w w awwamaamanmanzwamanzwananawamuanzwazazi wazazi wazaaa 4 1 4 2 Steady Operation IA 4 1 4 2 1 When Failures Occur aaa aaa 4 1 4 2 2 Cautions on Operation Stopping and Restarting 4 1 5 Maintenance nee ee ee 5 1 5 1 Daily INS POC hs sais soins soe sate sees dade deecuads aces cedeacedeatesced cad escedsadzaceeseds deed saduaces vedere 5 1 5 1 1 Cleaning the Sens cacon ai ita 5 1 5 1 2 Inspecting the Nut Used to Secure the Prism Assembly 5 1 5 1 3 Inspecting the Sealing O ring ooonoonnccnncnnncnnncnnconconcnnccnnccnrcnrcancnn 5 1 5 1 4 Inspecting the Cleaning Device wwwwwswmmmmamanmmamwammamazimamwaza 5 2 IM 12E6C1 01E 3rd Edition Apr 17 2015 00 ii lt CONTENTS gt 5 2 Inspection for Failure Occurrence u 2204442044400nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 5 2 5 2 1 Inspecting the Prism Assembly 22044204snnnnnennennnnnnnennnnnnnnn nn 5 2 5 2 2 Inspecting the Prism Assembly Seal Section 5 2 5 2 3 Inspecting the Insulation Performance of the Sensor Main Unit 5 2 Customer Maintenance Parts LIST CMPL 12E06C01 01E Revision Informate i IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 1 Overview gt 1 1 1 1 1 Overview This chapter describes the specifications of the SS300G MLSS Sensor Features of the SS300G MLSS Sensor e This se
19. oduct is strictly prohibited The following symbols are used in the product and user s manual to indicate that there are precautions for safety m Notes on Handling User s Manuals Please hand over the user s manuals to your end users so that they can keep the user s manuals on hand for convenient reference Please read the information thoroughly before using the product The purpose of these user s manuals is not to warrant that the product is well suited to any particular purpose but rather to describe the functional details of the product No part of the user s manuals may be transferred or reproduced without prior written consent from YOKOGAWA YOKOGAWA reserves the right to make improvements in the user s manuals and product at any time without notice or obligation If you have any questions or you find mistakes or omissions in the user s manuals please contact our sales representative or your local distributor m Warning and Disclaimer The product is provided on an as is basis YOKOGAWA shall have neither liability nor responsibility to any person or entity with respect to any direct or indirect loss or damage arising from using the product or any defect of the product that YOKOGAWA can not predict in advance IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt Introduction gt Wl m Symbol Marks Throughout this user s manual you will find several different types of symbols are used to identify different sections
20. op in mounting bracket S Wire hanging bracket Butterfly nut secure U UU LJ F3105 ai Figure 3 5 Attaching the Drop in Mounting Bracket AN NOTE While incorporating the sensor use care to keep the terminal treatment section of the sensor cable from being stained or getting wet Use care not to scratch the measuring window section of the sensor during installation N SEEALSO For installation to the PH8HG DOX8HS HH350G PB350G and PB360G holders refer to relevant user s manuals 3 2 Wiring The SS300G sensor cable is connected to the terminal of the SS400G converter or relay terminal box 3 2 1 Sensor Cable Specifications Cable length 3 5 10 15 or 20 m Cable diameter Approx 7 mm Temperature range 10 to 60 C Terminal treatment Pin terminal 3 2 2 Connecting the Sensor Cable The sensor requires maintenance calibration cleaning Consideration must be given with regard to the installation location so that maintenance work including removal of the sensor can be performed without difficulty IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 3 Installation and Wiring gt 3 7 Guide to Cable Installation Before connecting the sensor cable to the converter or relay terminal box check that the cable passes through the pipe of the holder and the sensor securing nut Next connect the cable to the correct terminals according to the mark band 11 to 19
21. orientation mark flat notched section Solution flow direction Solution flow direction Correct installation Incorrect installation F3101 ai Figure 3 1 Installation orientation of MLSS Sensor Installation by Drop in Mounting Bracket Install the sensor according to the following procedure 1 Attach the drop in mounting bracket to a sufficiently strong 2 inch pipe as shown in Figure 3 2 Nominal size 50 A 2 inch vertical pipe Nut Washer F3102 ai Figure 3 2 Attaching the drop in mounting bracket IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 3 Installation and Wiring gt 2 Cut the wire to an appropriate length based on the submerge depth of the sensor 3 As shown in Figure 3 3 assemble the wire hanging bracket and pass one end of the wire through the securing pipe and secure it using the dedicated nut After hand tightening the butterfly nut on the U bolt use a pair of pliers to strip the threads of the screw at the tip of the bolt Pipe used to secure wire Bracket used to hang wire Nut secure Dedicated nut used to secure wire wer 30 mm F3103 ai Figure 3 3 Assembling the Wire Hanging Bracket 4 As shown in Figure 3 4 incorporate the sensor in the securing bracket or cleaning device and pass one end of the wire through the securing bracket and secure it with the dedicated nut Note Be sure that the sensor is correctly oriented IM 12E6C1 01E 3rd Edition Apr 17 2015
22. r body in clean water Next use a soft material such as tissue paper to remove stains For stains stuck on the measuring window section use soft cloth tissue paper or Q tip cotton swabs to remove them If it proves difficult to remove stains use a cloth soaked in a diluted neutral detergent to remove After cleaning thoroughly rinse the unit with water CAUTION Do not use a hard tool such as a brush to scrub the measuring window section Doing so will likely scratch the measuring window When using a detergent observe the cautions indicated on the container Inspecting the Nut Used to Secure the Prism Assembly Each time cleaning or calibration is performed check for loosening of nut used to secure the prism assembly If found tighten it If the securing nut is extremely loose for safety s sake it is recommended that prism assembly seal section be inspected as described in Subsection 5 2 2 Inspecting the Sealing O ring Remove the prism assembly from the sensor main unit every 6 months and check for deterioration or deformation of the O ring if found replace the O ring It is recommended that the O ring be replaced periodically even if it is not visibly deteriorated or deformed Replacing part number K9432QD If solution to be measured is found inside the sensor during inspection the sensor must be replaced IM 12E6C1 01E 3rd Edition Apr 17 2015 00 5 2 lt 5 Maintenance gt AN CAUTION 5 1 4 5 2 5 2 1
23. ssible to use the drop in mounting bracket option for direct submergence in the measuring process This section explains items to note when selecting both the installation location for the SS300G and the holder to be used Selecting Measuring Point Install the sensor at an appropriate location where the typical measured value of the measurement subject can be obtained To obtain an accurate MLSS value Maintain a 7 cm distance between the tip of the sensor and walls or other obstacles When the solution to be measured generates an interface maintain a 7 cm distance between the tip of the sensor and the interface Do not expose the measuring window section of the sensor to strong tight such as sunlight In addition the temperature and pressure of the solution to be measured must conform to SS300G specifications With regard to maintenance cleaning calibration easy access should be taken into consideration when installing the sensor Note Gb may be restriction on the installation location depending on the type of holder used See the holder instruction manual for etails Selecting a Holder The holders that contain the SS300G MLSS sensor have the following characteristics respectively Select a holder according to such conditions as the property of the solution to be measured and the measurement location Drop in type option This holder can be easily installed by simply hanging the sensor from the drop in mountin
24. tially eliminated The addition of an optional jet cleaning devices makes it possible to automatically perform periodic cleaning reducing maintenance frequency The unit can be combined with suitable holders including floating type holders making highly reliable measurement a reality F1101 ai Figure 1 1 Overview of the SS300G MLSS Sensor IM 12E6C1 01E 3rd Edition Apr 17 2015 00 1 2 lt 1 Overview gt 1 2 Specifications 1 2 1 Standard Specifications Shape Probe like Sensor Measurement subjects Concentration of mixed liquor suspended solids MLSS in an aeration tank in a sewage or industrial wastewater treatment plant Note MLSS analyzer can not be used for measurement of suspended solids SS concentration in effluent after aeration treatment neutralization facilities and seawater When a guide pipe type sensor is used in excreta disposal facilities the cable must not come in contact with the liquid Consult with Yokogawa Measuring principle Transmitted and scattered lightcomparison Measuring Range 500 20000 mg L kaolin standard Temperature of measured subjects 0 50 C Pressure of measured subjects 0 200 kPa pH of measured objects pH 6 to 8 Flow velocity 0 2 to 1 m sec depending on holder Cable length 3 5 10 15 or 20 m when terminal box used maximum cable length is 50 m within sensor cable length Material of wetted part or junction Body Stainless steel SUS304 or eq
25. uivalent Window glass O ring nitrile rubber Cable PVC Weight Approximately 0 5 kg plus N x 0 12 kg where N is cable length m Cleaning unit optional Jet cleaning Note No cleaning unit can be used if the sensor is equipped with a floating ball holder Material of jet cleaning unit Polypropylene polyethylene and SUS304 wetted part Utilities of jet cleaning Pressure water jet 100 to 200 kPa air jet 100 to 200 kPa Flow rate water jet 5 to 20 L mim air jet 10 to 20 NL min Characteristics Linearity 4 5 F S by stable kaolin solution Repeatability 2 F S by calibration plate Stability Zero 2 F S day by city water Span 2 F S day by calibration plate Note F S means upper setting value of output range IM 12E6C1 01E 3rd Edition Apr 17 2015 00 lt 1 Overview gt 1 3 1 2 2 1 2 3 Model and Codes Style S2 Model Suffix code Option code Description SS300G MLSS Sensor NNO errr Always NN Cable length 03 3m 05 5m 10 10m 145 15m 20 20m Treatment on cable ends PAN Pin terminals Options pi F WA a Cleaning unit JTJ Rc1 2 connection with jet cleaning unit female thread IJTA 1 2NPT connection with jet
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