Model FC500G Free Available Chlorine Analyzer (Non
Contents
1. 4 1 4 1 3 Measuring Range Setting ua aa www 4 2 4 1 4 Setting of Applied Voltage Compensation Applied Voltage Fixation Selection ire 4 3 4 2 SAU spree en en en eee er 4 4 4 2 1 Supplying Sample Water 4 4 4 2 2 Confirmation of Power Supply Voltage and Measuring Range Selection Jumpers Setting StatUS lt lt lt lt lt wwanmanmwamanaaamanmwamaziwamaa 4 4 4 2 3 SUPPLYING POW GN sais eich cece cece tes cage aka 4 5 4 2 4 Operation Chokaa KAA a E AEE 4 5 IM 12F5A2 01E Toc 2 4 2 5 lee EE 4 5 4 3 Steady State Operation ccecccccsssseeceseesesseeeeeeseecseeeneneeneeseeenneneessesenenennes 4 6 5 CALIBRATION EEN 5 1 5 1 Zi il AA AA 5 1 5 1 1 Zero Calibration Procedure Using the Open Input Circuit Method 5 1 5 1 2 Zero Calibration Procedure Using Chlorine Free Water Method 5 1 5 2 Span CalibraloN E 5 2 5 2 1 Span Calibration Procedure Using the Sampling Method 5 2 5 2 2 Span Calibration Procedure Using Standard Solution Method 5 2 6 INSPECTION AND MAINTENANCE 111101rarna manmanan manna 6 1 6 1 Mechanical System iii aeaaaee daa ep eaaa an aaa adaa aa aa daaa 6 1 6 1 1 Indicator Electrode PolishiNg Wa 6 1 6 1 2 Glass Beads and Measuring Tank Cleaning wwswswwa 6 2 6 1 3 Brush and Slip Ring Checking lt lt w wsmwwamaamanzanzwazaamanzanzaazanzaazaazaa 6 3 6 2 Electrical System NAA nnan eane nananana nanena ins 6 52. Re tighten the drain cock Re tighten the piping joint fittings IM 12F5A2 01E lt 8 AUXILIARIES AND CONSUMABLES gt 8 1 8 AUXILIARIES AND CONSUMABLES 8 1 Auxiliaries and Consumables List Table 8 1 shows auxiliaries and consumables Table 8 1 Auxiliaries and Consumables Item Part number Remarks Indicator electrode K9332MB Rotating gold electrode Counter electrode K9332MK Reference elctrode Washing indicator electrode Glass beads K9332ZJ 2 bags WA Polishing Indicator electrode Polishing powder K9088PE alumina 30 g Brush KI332JX Paired with slip ring Slip ring KI332JZ Paired with brush Ge K9044FX One bottle 3 mi for continuity stabilization at the base of indicator electrode Fuse 1A A1109EF 250V 1A 8 2 Auxiliaries and Consumables 8 2 1 Polisher Part number K9088PE This is used for polishing the indicator electrode surface 8 2 2 Glass Beads Part number K9332ZJ The cleaning capability of glass beads in prolonged use deteriorates owing to abrasion Normally replace the beads once or twice a year 8 2 3 Indicator Electrode Part number K9332MB The electrode is gradually abraded by cleaning using glass beads Generally the electrode can be used for around three or four years However it is recommended that one spare electrode should be stored for unforeseen accident 8 2 4 Grease Part number K9044F X The grease is applied to stabilize continuity at the mounting base part
3. gt Inspection or maintenance Be Measuring tank Detector Air supply Pressure regulator 6 mm OD X 4 mm ID polyyethylene tube Figure 3 2 Air Purge Piping IM 12F5A2 01E 3 3 lt 3 INSTALLATION PIPING AND WIRING gt 3 3 Wiring Make wiring for power supply output signal and contact output Figure 3 3 shows the symbols on the converter terminals and the types of wiring to be connected Terminal board TM1 M4 screw ener refs ox SSS Detector signal SE Se Em a Exclusively used cable already wired 4 to 20 mA DC to earth supply F3 3 ai output Note Make grounding to earth grounding resistance 100 Q or less Symbols on the Converter Terminals and the Types of Wiring to be Connected Figure 3 3 3 3 1 Wiring for Power Supply and Grounding Use a three conductor cable of 9 to 12 mm OD each conductor having a cross section of 1 mm or more Make grounding to earth grounding resistance 100 Q or less 3 3 2 Analog Output Wiring Use a two conductor shielded cable of 9 to 12 mm OD each conductor having cross section of 0 5 mm or more The shield should be connected to terminal G IM 12F5A2 01E lt 4 OPERATION gt 4 1 4 OPERATION This chapter chiefly describes the preliminary work to be performed prior to putting into operation 4 1 Preparation for Operation 4 1 1 Inspection of Piping and Wiring Status Co
4. 1 Detector Figure 2 1 shows component names and their functions of the detector Teflon PTFE ring ae Ui vZZi SS KA Sen ELLA Indicator electrode Beads case rotating elecrtrode H I Measuring tank Glass beads Polishes the totating indicator electrode to hold indicator electrode in a clean state Electrode assembly Cell motor A motor for rotaing the indicator electrode ata constant speed Air purge piping connection port Measuring tank for FC500G 5 Sample inlet Indicator electrode rotating elecrtrode Counter electrode Pt1000Q sensor incorporated Da k rain coc If loosened this cock drains the liquid in the measuring tank F2 1 ai Figure 2 1 Component Names and Functions of the Detector IM 12F5A2 01E 2 2 lt 2 COMPONENT NAMES AND FUNCTIONS gt 2 2 Converter Figure 2 2 shows the converter component names and their functions Figure 2 2 is a figure with the cover removed Measuring range selection should be performed in this state MEAS CHECK selection switch For converter checking Zero calibrator E select CHECK position Operated when Converter cover Display liquid crystal zero is to be L calibrated To be operated Measuring range with the setting switch Sa del terminal cover Sets a measuring h A removed range ET mai L T JA Power supply
5. 3 Quickly measure the free available chlorine concentration of the sampled sample water us ing a manual analysis such as amperometric titration AT method 4 Slowly turn the span calibrator potentiometer using the attached flat blade screwdriver to adjust display to the manually analyzed value 5 2 2 Span Calibration Procedure Using Standard Solution Method 1 Prepare diluting solution which is obtained by adding 10 mI l of pH 7 buffer solution and 50 mg l of NaCl to purified water sample water can also be used instead of purified water 2 Prepare 2 to 3 liter of the standard solution conditioned to a free available chlorine concen tration of approximately 80 of the measuring range To obtain this solution dilute commer cially available sodium hypochlorite NaCIO solution using the diluting solution prepared in step 1 3 Stop supply of sample water and wait until the sample water level in the measuring tank decreases to below the sample water inlet Then disengage the sample water inlet piping 4 Introduce the standard solution into the measuring tank Connect a tube to the sample water inlet and pour the solution contained in a suitable vessel into the measuring tank by utilizing a head from the inlet If a pump is used for supply use a flow rate of 100 ml min or more 5 After the free available chlorine concentration display has stabilized loosen the drain cock to sample the standard solution In sampling the s
6. IM 12F5A2 01E User s Model FC500G Manual Free Available Chlorine Analyzer Supplement Thank you for selecting our Model FC500G Free Available Chlorine Analyzer User s Manual IM 12F5A2 01E 4th Edition supplied with the product some revisions additions have been made Please replace the corresponding pages in your copy with the attached revised pages Revisions Page 1 2 Some revision of 1 1 Standard Specifications EMC Australia and New Zealand added Page 6 2 Some revision of 6 1 1 Indicator Electrode Polishing YOKOGAWA All Rights Reserved Copyright 2013 2nd Edition Jul 2013 YK IM 12F5A2 01 E Subject to change without notice 4th Edition Yokogawa Electric Corporation 1 1 lt 1 OVERVIEW gt Standard Specifications Measured Object Free available chlorine contained in tap water Measuring System Polarographic method using rotating electrode Measuring Ranges O to 1 0 to 2 0 to 3 mg l Model FC500G 1 0 to 5 0 to 10 mg l Model FC500G 5 Air purge is necessary Indication Digital 3 1 2 LCD Output Signal 4 to 20 mA DC Load resistance Maximum 500 Q Operating pH Range of Sample Solution pH 6 5 to 7 5 For measured liquids whose pH exceeds the above limits error increases refer to the following figure Sample Solution Temperature 0 to 40 C temperature compensation range 5 to 35 C Pressure 1 to 30 kPa for without VALVE 1 to 150 kPa with VALVE Flow Rate 0 1 to 2 5
7. Then press a cotton swab soaked in alcohol on the rotating slip ring to wipe off debris 2 Increasing the brush contact pressure Turn off power to the FC500G Loosen the lock screw next to the contact pressure adjusting screw and then the 2 fixing screws for the brush mounting bracket Turn the contact pres sure adjusting screw in 1 2 turn Tighten the lock screws and bracket fixing screws Make sure that the brush does not come in contact with the pulleys and does not come off the slip ring Then turn on the power IM 12F5A2 01E Customer Model FC500G E Maintenance Free Available Chlorine Analyzer Parts List Non Reagent Type Item PartNo Qty Description 1 1 Case Assembly 2 1 Knob 3 1 Cover 4 1 Display Assembly 5 Y9620NU 2 M6xX20 Bolt 6 A1109EF 1 Fuse 1A 7 1 Protector Assembly 8 See 1 Plate 9 1 Bracket Assembly 10 1 Main Board Assembly 11 K9332ZJ Beads 12 K9332KZ Packing 13 K9332KX Beads Case 14 K9332MB 15 K9044FX Indicator Electrode Conductive Grease 16 K9332MK 1 Counter Electrode 17 Y9416LU 4 M4X16 Bolt 18 Ge 1 Cover 19 K9332LK 1 Gasket 20 2 Post 21 K9332KL 1 Measuring Cell 22 Y9114XB 1 O Ring 23 K9334UN 1 Connector 24 Y9110XB 1 O Ring 25 K9332KR 1 Drain Cock Assembly 26 1 Bracket Assembly 27 Y9520LU 2 M5x20 Bolt 28 Y9601BU 2 M6 Nut 29 L9831KL 1 Nut 30 K9332KP 1 Cap 31 K9332JX 1 Brush Assembly 32 k nn 1 Slip Ring 33 L9804UK 1 B
8. counter electrode terminals RE T1 T2 and the indicator electrode terminals ME Check the leadwire symbols and correctly connect the leadwires Clean the brush and the slip ring a Adjust the brush contact pressure and remove wear debris from the slip ring see subsection 8 2 6 b Replace the brush and slip ring see 4 subsection 6 1 3 Disconnect leadwires to the counter electrode terminals T1 and T2 and check that the resistance across terminals T1 and T2 is approx 1 kO at room temperature and the resistance across the terminals RE and T1 or T2 is 1 MQ or more If these are not satisfied replace the counter electrode Adjust the flow rate Adjust so that sample water just overflows the weir in the measuring tank Perform zero and span calibration Place the MEAS CHECK selector switch in CHECK position and check if the display indicates 0 9 to1 1 mg l If it is not satisfied contact Yokogawa Abnormal analog The load resistance is larger than Adjust the load resistance to 500 O or less output 500 Q 2 Electrical circuit failure 2 Contact Yokogawa The indicator 1 The belt is broken 1 Replace the belt electrode does 2 The motor fails 2 Replace the motor not revolve or 3 The rotating shaft bearing has 3 Replace the bearing irregularly rotates corroded Sample water leakage Drain cock is inadvertently not closed Piping joint loosened
9. l min at tank inlet Conductivity 100 to 300 uS cm SS Suspended Solid 10 mg l or less Air Purging for only O to 5 O to 10 mg l Range Supply Air Pressure About 50 to 140 kPa Air Consumption About 5 l min Electrode Indicator Electrode Rotating gold electrode Counter Electrode Silver electrode with Pt 1000 installed Electrode Cleaning Glass beads used for cleaning Wetted Part Materials Measuring Tank Acrylic resin molding Piping Flexible PVC and PE Color Muncell 5Y7 1 Finish Baked polyurethane resin coating Mounting On the wall or 2 inch pipe OD 60 5 mm Ambient Temperature 5 to 50 C Power Supply 100 or 110 V AC or 200 or 220 V AC as per order 10 50 or 60 Hz Power Consumption Approximately 15 VA 100 or 110 V 20 VA 200 or 220 V Weight Approximately 6 5 kg EMC Regulatory Arrangement in Australia and New Zealand HEN EN 55011 Class A Group 1 Characteristics Reproducibility 2 of full scale Linearity 5 of full scale Stability Zero Drift Within 1 of full scale month Span Drift Maximum 10 of full scale month Response Time Approximately 2 minutes time required to obtain a value within 90 of final value Ambient Temperature Influence 0 5 of full scale 10 C Power Voltage Fluctuation Influence 0 5 of full scale 10 of rated voltage Sample Solution Temperature Compensation Error 3 of full scale 5 to 35 C IM 12F5A2 01E 6 2 lt 6 INSPECTION AND MA
10. of the chlorine free water After the solution level in the measuring tank decreases to below the sample water inlet remove the tube and restore the sample water piping connection Supply sample water IM 12F5A2 01E 5 2 lt 5 CALIBRATION gt 5 2 Span Calibration There are two span Calibration methods sampling method using which calibration is performed based on the manually analyzed free available chlorine concentration of sample water and the standard solution method which allows calibration using a standard calibration solution having a free available chlorine concentration of approximately 80 of the measuring range Calibrate the analyzer span using the sampling method unless the chlorine concentration of sample water is near zero Span calibration can be performed without removing the terminal cover Note Before performing span calibration confirm that the electrode does not remain exposed to the air as after zero calibration and the electrode rotates normally in the measuring tank 5 2 1 Span Calibration Procedure Using the Sampling Method 1 Confirm that the free available chlorine concentration in the sample water is stable by ob serving displayed values 2 Sample the sample water by loosening the drain cock at the bottom of the measuring tank When sampling the sample water exercise care so that the tip of the counter electrode is not exposed to air above the level of the sample water
11. 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 12F5A2 01E iii Symbol Marks Throughout this user s manual you will find several different types of symbols are used to identify different sections of text This section describes these icons ZN WARNING 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 AN NOTE Draws attention to information essential for understanding the operation and features IM 12F5A2 01E After sales Warranty E Do not modify the product E During the warranty period for repair under warranty consult the local sales representative or service office Yokogawa will replace or repair any damaged parts Before consulting 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 f we replace the product with a new one we won t provide you with a repair report Yokogawa warrants the product f
12. 0v 100V 2 E 8 Ji tee LAN 200 V System Ce 7 200 V 100 V si Figure 4 6 Power Supply Voltage Selection Jumper IM 12F5A2 01E lt 4 OPERATION gt 4 5 If the FC500G 1 free available chlorine analyzer is used confirm that the measuring range selection jumper is set as shown in Figure 4 7 1 For the FC500G 5 free available chlorine analyzer confirm that the jumper is set as shown in Figure 4 7 2 FC500G1 sanan Side A D D Measuring range Kee 0 to 3 mg l ojo 2 OjO E Measuring range FC500G 5 Le Side B i 0 to 10 mg l Figure 4 7 Measuring Range Selection Jumper 4 2 3 Supplying Power Arrange a power supply whose voltage and frequency confirm to the specifications Confirm that the fuse holder cap in the converter is tight and then turn ON the power switch 4 2 4 Operation Check Confirm that a measured value is displayed in the display Also visually confirm that there is no irregularity or significant deflection when the indicator elec trode revolves 4 2 5 Calibration Implement zero and span calibration referring to chapter 5 IM 12F5A2 01E 4 6 lt 4 OPERATIONS 4 3 Steady State Operation There is no need for special action during analyzer operation except for executing inspection and maintenance described in chapter 6 If a failure occurs dispose of it referring
13. 1 2 1 1 lt 1 OVERVIEW gt Standard Specifications Measured Object Free available chlorine contained in tap water Measuring System Polarographic method using rotating electrode Measuring Ranges O to 1 0 to 2 0 to 3 mg l Model FC500G 1 0 to 5 0 to 10 mg l Model FC500G 5 Air purge is necessary Indication Digital 3 1 2 LCD Output Signal 4 to 20 mA DC Load resistance Maximum 500 Q Operating pH Range of Sample Solution pH 6 5 to 7 5 For measured liquids whose pH exceeds the above limits error increases refer to the following figure Sample Solution Temperature 0 to 40 C temperature compensation range 5 to 35 C Pressure 1 to 30 kPa for without VALVE 1 to 150 kPa with VALVE Flow Rate 0 1 to 2 5 l min at tank inlet Conductivity 100 to 300 uS cm SS Suspended Solid 10 mg l or less Air Purging for only O to 5 O to 10 mg l Range Supply Air Pressure About 50 to 140 kPa Air Consumption About 5 l min Electrode Indicator Electrode Rotating gold electrode Counter Electrode Silver electrode with Pt 1000 installed Electrode Cleaning Glass beads used for cleaning Wetted Part Materials Measuring Tank Acrylic resin molding Piping Flexible PVC and PE Color Muncell 5Y7 1 Finish Baked polyurethane resin coating Mounting On the wall or 2 inch pipe OD 60 5 mm Ambient Temperature 5 to 50 C Power Supply 100 or 110 V AC or 200 or 220 V AC as per order 10 Yo 50 or 60 Hz Power
14. 6 2 1 Span Cal ration EE 6 5 6 2 2 Converter Checkimg nanma kaniazazza 6 5 6 2 3 Fuse ReplacemeNbi GRAN ANGARA RANG 6 5 7 TROUBLESHOOTING aamin a Aa aasa 7 1 8 AUXILIARIES AND CONSUMABLES ul EE 8 1 8 1 Auxiliaries and Consumables LISt wwwmwmwamammamamwa maza mazanwazamwa nana zazuiwa 8 1 8 2 Auxiliaries and Consumables wwwswmmazmamamwu wanauwa manaa ma nauza zauwa zana nazani 8 1 8 2 1 Polisher Part number KOPPEN 8 1 8 2 2 Glass Beads Part number KO333 I na annnwwnnwwanwwnnawannannwasnwna 8 1 8 2 3 Indicator Electrode Part number K9332MB ma nnanwwanwwwnwwanana 8 1 8 2 4 Grease Part number KOOAAE XA 8 1 8 2 5 Counter Electrode Part number K9332MK nnmn awan wwnnwwnawwannwns 8 1 8 2 6 Brush and Slip Ring Part number KI332JX KOI332JZ 8 2 Customer Maintenance Parts List c scseessesseesees CMPL 12F05A02 01E Revision Information naaa AINA KA KI NAAN i IM 12F5A2 01E lt 1 OVERVIEW gt 1 1 1 OVERVIEW Model FC500G Free Available Chlorine Analyzer Non Reagent Type is used for continuous measurement of free available chlorine in tap water distribution This analyzer consists of a detector and a converter as shown in Figure 1 1 This chapter describes the FC500G free available chlorine analyzer specifications and its measuring principle Detector Converter Figure 1 1 Appearance of Model FC500G Free Available Chlorine Analyzer IM 12F5A2 01E
15. Consumption Approximately 15 VA 100 or 110 V 20 VA 200 or 220 V Weight Approximately 6 5 kg Characteristics Reproducibility 8 2 of full scale Linearity 5 of full scale Stability Zero Drift Within 1 of full scale month Span Drift Maximum 10 of full scale month Response Time Approximately 2 minutes time required to obtain a value within 90 of final value Ambient Temperature Influence 0 5 of full scale 10 C Power Voltage Fluctuation Influence 0 5 of full scale 10 of rated voltage Sample Solution Temperature Compensation Error 3 of full scale 5 to 35 C IM 12F5A2 01E lt 1 OVERVIEW gt 1 3 1 0 5 pH6 5 pH7 5 p g g 0 5 ji Ki Operating range 3 gt 0 1 1 1 i 1 1 i 3 4 5 6 T 8 9 10 pH Figure 1 2 Sensitivity characteristics of diffusion current by pH value 1 0 D E g 0 8 Q 77 Z oe Ko bi ke DA 0 3 0 100 200 300 400 500 Conductivity o S cm Figure 1 3 Sensitivity characteristics of diffusion current by conductivity Note If conductivity exceeds 300 uS cm default value of applied voltage should be changed E Accessories Fuse 1A mna 4 pcs Glass Beads 00 000 1 2 bags Allen Wrench 2 pcs Screwdriver flat blade 1 pc Polishing Powder 1 bottle IM 12F5A2 01E 1 4 lt 1 OVERVIEW gt 1 2 Model and Suffix Codes Model Suffix Code Option Code Descrip
16. Figure 4 2 The polishing ability cannot be recovered by replenishing the beads only by volume reduced by wear Restore the beads case and rubber packing in the measuring tank Restore the electrode assembly to the measuring tank and secure it using the two fixing screws Supply sample water Turn ON the converter power switch Confirm that the indicator elec trode normally revolves and the concentration display presents approx the proper value Finally mount the converter cover The cleaning effect of the glass beads deteriorates owing to abrasion of the beads them selves over prolonged use Recommended practice is to replace the beads once or twice a year
17. INTENANCE gt A CAUTION Do not touch the rotating shaft brush slip ring or the indicator electrode surface 7 8 9 Mount the electrode assembly cover and restore the electrode assembly in the measuring tank Tightly secure the assembly using the two fixing screws Turn the converter power switch ON and confirm that the indicator electrode revolves nor mally Also confirm that the concentration display presents an approximately proper value Mount the converter cover In addition after the electrode is polished perform running in operation for one hour or longer Then calibrate span without fail Note Polish the electrode surface gold electrode by following the instructions below when it has 6 1 2 become corrugated or deformed from the original shape about 3 mm in diameter Polish the electrode surface with sandpaper about 600 until the surface becomes finally rounded Then polish it with sandpaper about 2000 and lastly with polishing powder alumina Make sure the electrode surface is clean and then install the indicator electrode Reduce the amount of ceramic beads if the electrode has deformed greatly The ceramic beads should be filled up to 5 mm under the bottommost notch of the beads case when the indicator electrode is inserted Glass Beads and Measuring Tank Cleaning If the glass beads are contaminated cleaning effect deteriorates Periodically clean the glass beads and the measuring tank The
18. Measuringrange a IT voltage selection selecting jumper jumper H Applied voltage MH IG compemsation fixation selection jumper ERE Power switch MEAS ON Fastener SPAN Y Fuse The terminal cover CHECK NG HEN 4 should be attached va O Of or detached with ee Ss this fastener grip pulled out External wiring connection terminals Terminal cover Span calibrator x Operated when span is to be calibrated Figure 2 2 Converter Component Names and Their Functions AN NOTE The measuring range selection jumper and the power supply voltage selection jumper are shipped with these set based on the desired specifications The specifications cannot be changed by jumper selection IM 12F5A2 01E lt 3 INSTALLATION PIPING AND WIRING gt 3 1 3 INSTALLATION PIPING AND WIRING This chapter describes procedures for the FC500G free available chlorine analyzer installation piping and wiring 3 1 Installation 3 1 1 Location Install the FC500G free available chlorine analyzer non reagent type in a location which meets the following conditions e Free from rain water such as an indoor location or in a cabinet e Low vibration e No exposure to direct sunshine e Little dust e Absence of corrosive gas e Easy ma
19. User s EXA FC Manual Model FC500G Free Available Chlorine Analyzer Non Reagent Type IM 12F5A2 01E TEE vigilantplant YOKOGAWA ee Yokogawa Electric Corporation Introduction This user s manual describes the specifications installation operation maintenance and troubleshooting for Model FC500G Free Available Chlorine Analyzer Read this manual thoroughly to understand the contents before operating the equipment Notes on Hardware Appearance and Accessories Check the following when you receive the product e Appearance e Standard accessories Contact our sales representative or your local distributor if the product s coating has come off it has been damaged or there is shortage of required accessories Model and Suffix Codes The name plate on the product contains the model and suffix codes Compare them with those in the general specification to make sure the product is the correct one If you have any questions contact our sales representative or your local distributor Media No IM 12F5A2 01E Ath Edition Aug 2012 YK IM 12F5A2 01E All Rights Reserved Copyright 2007 Yokogawa Electric Corporation For the safe use of this equipment E 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
20. cator electrode turn clockwise IM 12F5A2 01E 6 2 lt 6 INSPECTION AND MAINTENANCE gt Ah CAUTION Do not touch the rotating shaft brush slip ring or the indicator electrode surface 7 8 9 6 1 2 Mount the electrode assembly cover and restore the electrode assembly in the measuring tank Tightly secure the assembly using the two fixing screws Turn the converter power switch ON and confirm that the indicator electrode revolves nor mally Also confirm that the concentration display presents an approximately proper value Mount the converter cover In addition after the electrode is polished perform running in operation for one hour or longer Then calibrate span without fail Glass Beads and Measuring Tank Cleaning If the glass beads are contaminated cleaning effect deteriorates Periodically clean the glass beads and the measuring tank The procedure follows 1 2 3 4 IM 12F5A2 01E Turn OFF the converter power switch Stop sample water supply Remove the two fixing screws of the electrode assembly and secure the assembly to the holding studs Remove the beads case from the measuring tank with the rubber packing attached In this case exercise care so as not to drop glass beads into the measuring tank Clean the inside of the measuring tank using a brush with detergent on it Use dilute hydro chloric acid if manganese or iron adheres Do not use organic solvent After cleaning com
21. cator electrode contamination influences the measured values Accordingly the indicator electrode rotating electrode is always rotated to polish its surface using glass beads However the surface very gradually becomes contaminated with time elapse Thus periodically polish the electrode surface using a polisher alumina Polish the electrode surface using the following procedure 1 2 B Q KEN 6 Remove the converter cover and turn OFF the converter power switch Remove the electrode assembly from the measuring tank and fix it to the holding stud It is not necessary to stop the sample water Remove the electrode assembly cover Insert an Allen wrench accessories into the hole on the side of the rotating shaft below the drive belt and manually fix the shaft Remove the indicator electrode by turning it counter clockwise Do not touch the rotating shaft brush slip ring or the indicator electrode surface Apply polisher alumina attached as an accessory to a wet gauze and carefully polish the electrode surface until all contamination is completely removed After polishing wash off the polisher using clean water Once the surface is clean it will wet uniformly without repelling water Electrode surface F6 1 ai Figure 6 1 Indicator Rotating Electrode Similar to electrode removal insert an Allen wrench into the hole and manually fix the rotat ing shaft so that it does not turn Fully screw in the indi
22. ds to be Put into the Beads Case 3 Return the electrode assembly to the measuring tank and tightly secure it using the fixing screws 4 1 3 Measuring Range Setting Select the measuring range using the setting switch Set it as shown in Table 4 1 Operate the setting switch using a small flat blade screwdriver Table 4 1 Switch Setting Corresponding to Measuring Range i DIP switch position Model Measuring p range 1 2 3 4 0 to 1 mg l ON OFF OFF OFF FC500G 1 0 to 2 mg l OFF OFF ON OFF 0 to 3 mg l OFF OFF OFF ON 0 to 5 mg l OFF ON OFF OFF FC5006 5 oe 10 mg l OFF OFF OFF ON Wo ore wo N wo A PETE OFF ON J5 jumper see Figure 4 5 Figure 4 4 Measuring Range Setting Switch IM 12F5A2 01E lt 4 OPERATION gt 4 3 AN NOTE For the FC500G 1 measuring ranges of O to 5 and 0 to 10 mg l cannot be used For the FC500G 5 measuring ranges of 0 to 1 0 to 2 and O to 3 mg l cannot be used 4 1 4 Setting of Applied Voltage Compensation Applied Voltage Fixation Selection Jumper The applied voltage can be fixed to a definite value without applied voltage compensation When the applied voltage compensation applied voltage fixation transfer jumper shown in Figure 4 5 is set to the side B lower the applied voltage is fixed to the starting voltage value compensa
23. elt YOKOGAWA All Rights Reserved Copyright 1993 Yokogawa Electric Corporation CMPL 12F05A02 01E 2nd Edition Apr 2001 YK y Subject to change without notice Yokogawa Electric Corporation Revision Information Title Model FC500G Free Available Chlorine Analyzer Non Reagent Type Manual No IM 12F5A2 01E Aug 2012 4th Edition Page layout changed All page layout changed by the standard template p 1 5 Deletion of conductivity measurement in subsection 1 4 Measuring Principle p 2 2 Deletion of some conductivity measurement description in Figure 2 2 p 3 3 Deletion of subsection 3 3 3 Contact Output Wiring this function doesn t exist p 4 2 Deletion of subsection 4 1 3 Setting of Display Free Available Chlorine or Conductivity Selection Jumper p 4 6 Deletion of subsection 4 3 1 Out of Sample Detection Contact Signal Output p 7 1 Deletion of conductivity display shows abnormality and Abnomal out of sample detection in chap ter 7 TROUBLESHOOTING table p 8 1 Some revision of subsection 8 1 Auxiliaries and Consuma bles List P N of fuse changed Oct 2009 3rd Edition Editted by InDesign Change the package of glass beads p 1 3 Apr 2008 2nd Edition Everything is reviewed Mar 1993 1st Edition Newly published E If 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
24. 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 product is strictly prohibited The following symbols are used in the product and user s manual to indicate that there are precautions for safety Em 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 YOKOGAWVA 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
25. intenance Figure 3 1 shows maintenance spaces Maintenance space Maintenance space Unit mm Approx 150 265 Approx 160 i Maintenance space 5 DS i m i Be ii 2 Sigg i b Ma St aLa i oo o cn i es tls i o gt i i s CH x N o E Figure 3 1 Maintenance Spaces for the FC500G Free Available Chlorine Analyzer IM 12F5A2 01E 3 2 lt 3 INSTALLATION PIPING AND WIRING gt 3 1 2 Mounting Mount the FC500G free available chlorine analyzer non reagent type on a wall surface For mounting holes see section 1 3 3 2 Piping 3 2 1 Sample Water Piping Connect a6 mm OD X 4 mm ID polyethylene tube to the sample water inlet Set the sample wa ter pressure at the sample water inlet to 1 to 30 kPa flow rate 0 1 to 2 5 l min Note If a sample water inlet valve is used set the pressure at the valve inlet to 10 to 150 kPa Connect a hose of 12 mm ID to the sample outlet Make piping so that no drain stagnates in the hose 3 2 2 Air Purge Piping Make the air purge piping only when the FC500G 5 free available chlorine analyzer is used The air purge piping connecting port 1 8 NPT female is located at the electrode assembly Exer cise care in piping because the electrode assembly must be removed in implementing inspection or maintenance see Figure 3 2 Electrode assembly
26. ion set at 0 4 kof Mount the brush Fit the brush hole above the right brush securing screw in with the posi tioning pin on the mounting bracket and tighten the two brush securing screws Exercise care so as not to bend the brush tip Confirm that the brush contactor contacts the slip ring and that the brush does not touch the pulley Adjust the contact pressure of the brush contact or in the following procedure Loosen the two securing screws of the brush mounting bracket Loosen the lock screw to the right of the contact pressure adjusting screw Move the brush mounting bracket toward you to once separate the brush contactor from the slip ring Screw in the contact pressure adjusting screw and then further screw in by three and a half turns from the position where the brush contactor just contacts the slip ring The contact of the contactor to the slip ring should be judged by the resistance change on a multi meter connected between the brush and slip ring Tighten the lock screw Also tighten the brush mounting bracket securing screws Turn ON the converter power switch Confirm that the driving and rotating shafts revolve smoothly Visually confirm that there is no irregularity at the contact part of the brush and the slip ring 10 Measure the resistance value again between the brush and the slip ring and confirm that it is 500 Q or less 11 Mount the electrode assembly cover 12 Confirm that the concentration displays p
27. le 0 to 2 mg l 11 2to 12 8 mA Approx 50 point of full scale 0 to 3 mg l 8 8 to 9 9 MA Approx 33 point of full scale 6 2 3 Fuse Replacement For preventive maintenance it is recommended to replace the power supply fuse once a year The fuse rating is 250 V 1 A ie gt Cap Oe A N H Remove the cap by turning it in the H Power Supply Fuse direction of the arrow Figure 6 3 Power Supply Fuse IM 12F5A2 01E lt 7 TROUBLESHOOTING gt 7 1 TROUBLESHOOTING If any operation abnormality appears take measures using the following procedures Abnormalities No indication Cause The fuse is blown Converter connector poor contact Countermeasures Replace the fuse Once turn OFF power and re engage the relevant connector Indication shows hunting Poor contact in the indicator rotating electrode mounting position Coat conductive grease auxiliary Abnormal chlorine concentration displayed Poor contact of the electrode terminals with connecting leadwires Miss wiring of leadwires to be connected to electrode terminals Poor continuity between the indicator rotating electrode and the contactor Deterioration of RTD insulation Sample water flow rate is out of range 0 1 to 2 5 l min Calibrated value deviation Electrical circuit failure 2 3 Correctly connect leadwires to the
28. nfirm that wiring and piping are made properly 4 1 2 Fill with Glass Beads for Electrode Polishing Put glass beads accessories for cleaning the indicator rotating electrode into the beads case in the measuring tank in the following procedure 1 As shown in Figure 4 1 mount the electrode assembly to the holding stud The electrode assembly is fixed to the measuring tank assembly using two screws In doing this exercise care so that the indicator rotating electrode and the counter elec trode are not struck by the measuring tank Also do not touch the surface of the indicator electrode with the fingers In maintenance position Electrode assembly Fixing screws 2 pcs F4 1 ai Figure 4 1 Removal of Electrode Assembly IM 12F5A2 01E 4 2 lt 4 OPERATION gt 2 Remove the beads case from the measuring tank The new glass beads are normally filled up to the bottommost notch of the beads case when the indicator electrode is inserted Taking care that glass beads do not drop from the beads case Mount the beads case so that its slits face the counter electrode pec ee Beads case Counter electrode reference electrode The bottommost notch Glass beads of the beads case Indicator electrode HE YS I E a DEL EI ZA Sie CU CE BIN CU i Rubber packing rotating electrode Beads case a Glass beads gt F4 2 ai Figure 4 2 Amount of Glass Bea
29. olution exercise care so that the tip of the counter electrode is not exposed to air above the level of the solution 6 Quickly measure the free available chlorine concentration of the sampled sample water us ing a manual analysis such as amperometric titration AT method 7 Slowly turn the span calibrator potentiometer using the attached flat blade screwdriver to adjust display to the manually analyzed value 8 Stop supply of the standard solution After the solution level in the measuring tank decreases to below the sample water inlet remove the tube and restore the sample water piping connection Supply sample water IM 12F5A2 01E 6 lt 6 INSPECTION AND MAINTENANCE gt 6 1 INSPECTION AND MAINTENANCE To continue good operating status perform inspections and maintenance as shown in Table 6 1 Determine the implementation cycle in accordance with the individual operation conditions Table 6 1 is a guide for the implementation cycle Table 6 1 Inspection and Maintenance Items and Implementation Cycle Inspection and maintenance item Implementation cycle Indicator electrode polishing Once month Glass beads cleaning Once three months Measuring tank cleaning Once three months Inspection or brush and slip ring Once three months Calibration Once month Converter checking Once month Fuse replacement Once year 6 1 6 1 1 Mechanical System Indicator Electrode Polishing Indi
30. on bracket 26 24 Union 2 Without Inlet Valve FC500G O000 E Maintenance space Maintenance space Unit mm Approx 150 260 Approx 160 Wiring inlet 3 23 holes Maintenance space Purge air inlet space for only FC500G 50010 E Converter Approx 250 Maintenance Maintenance space 240 Ng Qutlet 12 Nipple 2 08 5 holes for mounting Figure 1 4 Model FC500G Free Available Chlorine Analyzer External Dimensions IM 12F5A2 01E 1 6 1 4 lt 1 OVERVIEW gt Measuring Principle The FC500G free available chlorine analyzer non reagent type is used for measuring concentration of free available chlorine present in sample water such as chlorine Cl hypochlorous acid HCIO and hypochlorite ion CO The measuring principle of this analyzer is analysis determination using the rotating electrode polarographic method Free available chlorine concentration is determined by measuring the current diffusion current which flows when free available chlorine is subjected to electrolytic reduction by applying a voltage applied voltage between the indicator electrode rotating electrode and the counter electrode The applied voltage is set in a region where concentration polarization occurs plateau region in polarography In the plateau region the diffusion current does not change even if the applied
31. or the period stated in the pre purchase quotation Yokogawa shall conduct defined warranty service based on its standard When the custom er site is located outside of the service area a fee for dispatching the maintenance engineer will be charged to the customer In the following cases customer will be charged repair fee regardless of war ranty period e Failure of components which are out of scope of warranty stated in instruction manual e Failure caused by usage of software hardware or auxiliary equipment which Yokogawa Electric did not supply e Failure due to improper or insufficient maintenance by user e Failure due to modification misuse or outside of specifications operation which Yokogawa does not authorize e Failure due to power supply voltage frequency being outside specifications or abnormal e Failure caused by any usage out of scope of recommended usage e Any damage from fire earthquake storms and floods lightning disturbances riots warfare radiation and other natural changes 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 Yokogawa Electric will not bear responsibility when the user configures the product into systems or resells the product Maintenance service and supplying repair parts will be covered for five years after the production ends For repair for
32. pletely wash out the detergent or acid using clean water or sample water Move the glass beads to another vessel and clean them using dilute hydrochloric acid After that completely wash out the acid using clean water or sample water For the beads case and rubber packing remove dirt using detergent or dilute hydrochloric acid After that com pletely wash out the detergent or acid using clean water or sample water Set the beads case to the rubber packing and load the cleaned glass beads in the case If the beads have obviously become smaller in size much smaller than a diameter of 1 7 to 2 3 mm replace them with new ones Glass beads are worn in long term use thereby reducing the ability of polishing indicator electrode For optimum polishing the new glass beads are normally filled up to the bottommost notch of the beads case when the indicator electrode is inserted See Figure 4 2 The polishing ability cannot be recovered by replenishing the beads only by volume reduced by wear Restore the beads case and rubber packing in the measuring tank Restore the electrode assembly to the measuring tank and secure it using the two fixing screws Supply sample water Turn ON the converter power switch Confirm that the indicator elec trode normally revolves and the concentration display presents approx the proper value Finally mount the converter cover The cleaning effect of the glass beads deteriorates owing to abrasion of the beads
33. procedure follows 1 2 3 4 IM 12F5A2 01E Turn OFF the converter power switch Stop sample water supply Remove the two fixing screws of the electrode assembly and secure the assembly to the holding studs Remove the beads case from the measuring tank with the rubber packing attached In this case exercise care so as not to drop glass beads into the measuring tank Clean the inside of the measuring tank using a brush with detergent on it Use dilute hydro chloric acid if manganese or iron adheres Do not use organic solvent After cleaning completely wash out the detergent or acid using clean water or sample water Move the glass beads to another vessel and clean them using dilute hydrochloric acid After that completely wash out the acid using clean water or sample water For the beads case and rubber packing remove dirt using detergent or dilute hydrochloric acid After that com pletely wash out the detergent or acid using clean water or sample water Set the beads case to the rubber packing and load the cleaned glass beads in the case If the beads have obviously become smaller in size much smaller than a diameter of 1 7 to 2 3 mm replace them with new ones Glass beads are worn in long term use thereby reducing the ability of polishing indicator electrode For optimum polishing the new glass beads are normally filled up to the bottommost notch of the beads case when the indicator electrode is inserted See
34. resent the proper values and then mount the con IM 12F5A2 01E verter cover lt 6 INSPECTION AND MAINTENANCE gt 6 5 6 2 Electrical System 6 2 1 Span Calibration Perform span calibration at the rate of once every one or two weeks during the initial operation start period and check the sensitivity changes owing to indicator electrode contamination or the like to establish a reference for determining the calibration period After the calibration period is determined perform span calibration in an appropriate interval using the above period as a guide When the indicator electrode is polished perform span calibration without fail 6 2 2 Converter Checking Check the converter periodically The converter check function means to check the converter circuit operation Converter checks can be performed using switch operations Placing the MEAS CHECK selec tor switch in the CHECK position transfers the converter input current input and temperature input from connection to the detector to connection to the simulated input When the converter is normal the free available chlorine concentration display indicates 0 90 to 1 10 mg l regardless of the measuring range In this case the analog output is sent out in the range shown in Table 6 2 corresponding to the measuring range setting Table 6 2 Analog Output in Checking Measuring range Output current Approximate position 0 to 1 mg l 18 4 to 21 6 mA Approx 100 point of full sca
35. screw connection when the indicator electrode is replaced Apply the grease to the indicator electrode screw thread refer ring to the procedure manual attached to the auxiliaries 8 2 5 Counter Electrode Part number K9332MK Not subject to any abrasion this electrode can be used for a prolonged period However it is recommended to store one electrode as a spare IM 12F5A2 01E 8 2 lt 8 AUXILIARIES AND CONSUMABLES gt 8 2 6 Brush and Slip Ring Part number K9332JX K9332JZ Normally two years are considered the replacement interval Replacement of both items as a pair should be performed A CAUTION Do not touch the brush except when replacement is performed 0 Procedures for adjusting the brush contact pressure and removing wear de bris from the slip ring Wear debris generated from the sliding action of the slip ring and brush generated largely at the beginning may enter between the slip ring and the brush thereby temporarily increasing the contact resistance This may cause a drop in readings When this phenomenon occurs polish and clean the surface of the slip ring to prevent the generation of wear debris and the ingress of wear debris generated into a space between the slip ring and the brush and furthermore in crease the contact pressure of the brush to the slip ring surface 1 Polishing and cleaning the surface of the slip ring With the FC500G being powered press sandpaper 2000 on the rotating slip ring
36. st be replaced The following is the replacement procedure However in principle replacement should be en trusted to Yokogawa service personnel 1 Turn OFF the converter power switch 2 Remove the electrode assembly cover Remove the brush The brush is secured using two securing screws one of them also serves for the wiring terminal 3 Remove both pulleys of the drive shaft motor shaft and the rotating shaft indicator elec trode mounting shaft together with the belt Remove the drive shaft pulley by loosening two set screws using an Allen wrench of nominal 1 5 mm accessory Remove the rotating shaft pulley by loosening the screw at the tip of the shaft using a flat blade screwdriver with an Allen wrench of nominal 2 mm accessory inserted in the hole of the rotating shaft for preventing revolution 4 Draw out the slip ring from the rotating shaft and introduce a new slip ring IM 12F5A2 01E 6 4 lt 6 INSPECTION AND MAINTENANCE gt 5 00 N wo Ste 9 Mount the two pulleys and the belt in the reverse procedure Note If the belt is replaced perform the procedure described in the following steps 6 and 7 without fail Loosen the four mounting screws of the acrylic holder that secures the rotating shaft Set a spring balance to the hole under the rotating shaft slip ring and pull the shaft in the direction of applying tension to the belt Fix the holder Tighten the holder securing screws with a tens
37. them selves over prolonged use Recommended practice is to replace the beads once or twice a year lt 6 INSPECTION AND MAINTENANCE gt 6 3 6 1 3 Brush and Slip Ring Checking A CAUTION Do not touch the brush except when replacement is performed When the electrode assembly cover is removed for polishing the indicator electrode or for other purposes visually check the slip ring on the rotating shaft and the brush contacting the slip ring for abrasion Further measure resistance at the contact every six months On revolving the indicator elec trode measure the resistance between the brush securing screws and the part of the rotating shaft under the slip ring using a multi meter A resistance of 500 Q or less is acceptable Deive shaft Pulleys Brush Brush securing screws Slip ring Lock screw Rotating shaft Gear head Contact pressure adjusting screw Cell motor Electrode assembly Clamp Holder Counter reference electrode Indicator l rotating electrode F6 2 ai Figure 6 2 Indicator Rotating Electrode If the resistance exceeds 500 Q clean the slip ring using an cotton applicator soaked with alcohol with the indicator electrode rotated After cleaning re measure the resistance and confirm that the resistance is 500 Q or less If the resistance does not decrease below 500 Q or if abnormalities such as slip ring wear or brush wear and bending are detected the slip ring and or the brush mu
38. this product please contact the near est sales office described in this instruction manual IM 12F5A2 01E Model FC500G Toc 1 Free Available Chlorine Analyzer Non Reagent Type CONTENTS IM 12F5A2 01E 4th Edition Q Introd Cti h eene i For the safe use of this equipment sssssssuseunnunnnnnnnunnunnnnnnnunnunnnnnnn nneur nunnana ii After sales Warranty ua Aa iv 1 AE 1 1 1 1 Standard Specifications cccccccssccsccecesneseesseeneneesseseeeneeseeseeeeeeneeseeseeeeneneees 1 2 1 2 Model and Suffix CODE 1 4 1 3 External Dimensions AA Aaa 1 4 1 4 Measuring Principle 1 2 mma 1 6 2 COMPONENT NAMES AND FUNCTIONS ss wwa zama muauununa nana namana 2 1 2 1 NZ E 2 1 2 2 ee siisii neasa iae S eieaa aaa aa aaa aSa aaan 2 2 3 INSTALLATION PIPING AND WIRING nsansansnnnnnunnunnennnnnunnunnnunnnnnnnnnnnn nnne 3 1 3 1 Betala IR 3 1 3 1 1 ele Ire VE 3 1 3 1 2 elt LV 3 2 3 2 IDDIE ee 3 2 3 2 1 Sample Water Ping 3 2 3 2 2 Air Purge Piping hse knee ieee 3 2 3 3 WV TUNG BE 3 3 3 3 1 Wiring for Power Supply and Grounding 72m nanwnawanawwnawwnanwnanana 3 3 3 3 2 Analog Output WINING KI 3 3 4 OPERATION WE 4 1 44 Preparation for Operation ccscceccecesessssseeeeeseeseeseeeeeeneeseeseeeneeneeseeeeneneenaes 4 1 4 1 1 Inspection of Piping and Wiring StatuS ww wwwwmmmmmmmammamwaza 4 1 4 1 2 Fill with Glass Beads for Electrode Polishing
39. tion Side A Applied voltage o J5 Al lt lt lo g Applied volt pplied voltage Side B fixation J5 F4 5 ai Figure 4 5 Applied Voltage Compensation Applied Voltage Fixation Selection Jumper A NOTE If conductivity exceeds 300 uS cm applied voltage should be changed to fixation IM 12F5A2 01E 4 4 4 OPERATIONS 4 2 Start Up 4 2 1 Supplying Sample Water lt Sample inlet valve is not provided gt Confirm that the sample water pressure is within the range of 1 to 30 kPa and supply sample wa ter at the flow rate of 0 1 to 2 5 I min After supplying sample water confirm that the sample water level does not contact the top of the measuring tank lt Sample inlet valve is provided gt First fully close the sample inlet valve Then supply sample water at the pressure of 10 to 150 kPa After supplying sample water open the sample inlet valve so that the sample water flow rate is 0 1 to 2 5 l min 4 2 2 Confirmation of Power Supply Voltage and Measuring Range Selection Jumpers Setting Status If power supply specification for the free available chlorine analyzer non reagent type used is the 100 V system confirm that the power supply voltage selection jumper is set as shown in Figure 4 6 1 If the power supply specification is the 200 V system confirm that the jumper is set as shown in Figure 4 6 2 ar o WW SA XX 6C a t EE 100 V System Ca ee m Y Ji 200V 100V ae DO 0 3 20
40. tion FC500G Free Available Chlorine Analyzer Range 0 to 1 0 to 2 0 to 3 mg l Switchable 0 to 5 0 to 10 mg l Switchable Output signal 4 to 20 mA DC Power 100 V 10 50 60 Hz 110 V 21096 50 60 Hz 200 V 10 50 60 Hz 220 V 10 50 60 Hz Inlet valve Without Valve With Valve Language English E Spare Parts Name Parts No Note Indicator Electrode K9332MB Rotating Electrore Counter Electrode K9332MK Reference Electrode Glass Beads K9332ZJ Washing Indicator Electrode 2 bags Polishing Powder K9088PE Polishing Indicator Electrode Brush KI332JX Slip Ring K9332JZ Grease K9044FX 1 3 External Dimensions Figure 1 4 shows external dimensions of the FC500G free available chlorine analyzer non reagent type IM 12F5A2 01E lt 1 OVERVIEW gt 1 5 1 With Inlet Valve FC500G 0001 E Maintenance space 2 inch pipe 260 5 Maintenance space Unit mm Approx 150 265 Approx 160 Mounting bracket xt Wiring inlet 3 023 holes Ce IT 1 oi N i Kai p ji i g 2 SS o r Ee e H i g 3 i r 3 E r o Purge air inlet EIER ii aie 1 4 18 NPT 2198 17 Gi ji dol 38 for only FC500G 5 E Converter SS li ii an 0g IS jo di ji 213 48 i i ii LI s kr 131 240 310 105 52 5 per 4 4 085 holes for mounting U bolt
41. to chapter 7 IM 12F5A2 01E 5 5 1 5 1 1 5 1 2 lt 5 CALIBRATION gt 5 1 CALIBRATION Perform zero and span calibration when the analyzer is to be initially started up and also when re operated after prolonged shutdown During operation perform span calibration periodically approx once a month When span is to be calibrated first polish the indicator electrode see subsection 6 1 1 and then perform running in operation for approx one hour Zero calibration is virtually unnecessary during operation if it is performed once at start up How ever merely confirm periodically that the zero point is correct during operation Zero Calibration There are two methods for calibrating zero the open input circuit method using which the calibration is performed by pulling up the rotating and counter electrodes from the sample water and the chlorine free water method using water free from chlorine e g water filtered through activated carbon Normally calibrate zero using the open input circuit method However if free available chlorine of low concentration is always to be measured e g approx 0 1 mg l use the chlorine free water method for zero calibration Zero Calibration Procedure Using the Open Input Circuit Method 1 Remove the electrode assembly from the measuring tank with the indicator electrode ro tated and fix it to the holding studs Remove the electrode assembly by loosening the t
42. voltage changes In measurement practice since the plateau region changes with free available chlorine concentration the applied voltage is compensated so that measurement can always be performed in the plateau region Also since the diffusion current is affected by the sample water temperature temperature is compensated using a temperature sensor Pt1000Q incorporated in the counter electrode Figure 1 5 shows the block diagram for the FC500G free available chlorine analyzer non reagent type operation The analyzer determines the free available chlorine concentration by applying an applied voltage corresponding to the diffusion current between the indicator and counter electrodes and by applying temperature compensation to the diffusion current Diffusion current First stage amplifier Free available chlorine detecting circuit Applied voltage Applied voltage compensating pulse circuiut Free available chlorine conductivity display Temperature compensation circuit Counter electrode Temperature Pt 10000 signal Indicator electrode Drain circuit e PWM circuit Voltage current 4 to 20 mA DC isolator conversion output Sample Measuring water Hm AE tank F1 5 ai Figure 1 5 Block Diagram for FC500G Free Available Chlorine Analyzer Operation IM 12F5A2 01E lt 2 COMPONENT NAMES AND FUNCTIONS gt 2 1 2 COMPONENT NAMES AND FUNCTIONS 2
43. wo fixing screws It is not necessary to stop the sample water 2 After display of the free available chlorine concentration has stabilized perform zero calibra tion First remove the terminal cover Next slowly turn the zero calibrator potentiometer using the attached flat blade screwdriv er to adjust display to zero 3 Mount the terminal cover Return the electrode assembly to the measuring tank and tightly fix the assembly using the two fixing screws Zero Calibration Procedure Using Chlorine Free Water Method 1 Prepare two to three litre of chlorine free water prepared by adding 10 mI of pH 7 buffer solution and 50 mg l of NaCl to purified water 2 Stop supply of sample water and wait until the sample water level in the measuring tank decreases to below the sample water inlet Then disengage the sample water inlet piping 3 Introduce the chlorine free water into the measuring tank Connect a tube to the sample water inlet and pour the chlorine free water contained in a suitable vessel into the measuring tank by utilizing a head from the inlet If a pump is used for supply use a flow rate of 100 ml min or more 4 After the free available chlorine concentration display has stabilized perform zero calibra tion First remove the terminal cover Next slowly turn the zero calibrator potentiometer using an attached flat blade screwdriver to adjust display to zero 5 Mount the terminal cover Also stop supply
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