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YOKOGAWA FC400G User Manual Download Page 71

< 8. Maintenance >

8-2

IM 12F5A1-01E 

shown in Figure 8.2. The electrode mechanism block is fixed to the measuring tank using 

two screws at the lower part of the mechanism block.

Fixing 

screws (2 pcs)

Electrode

mechanism 

block

                 

Electrode

mechanism

block cover

 

Figure 8.1  

Electrode Mechanism  

 

Figure 8.2 

Under Maintenance 

 

  

 

Block Fixing Screws

(2)   Removing the Indicator Electrode  

Remove the electrode mechanism block cover from the detector. Hold the gears so that 

the drive shaft does not turn and remove the indicator electrode. The electrode is screwed 

into the drive shaft; turn the electrode counterclockwise. This time, do not touch the rotating 

contact

. (Figure 8.5) The deformed rotating contact disables electrode function.

)

 

Electrode surface

 

Figure 8.3 

Appearance of the Indicator Electrode

(3)   Polishing the Electrode Surface of the Indicator Electrode  

Spread the provided abrasive (alumina) onto dampened gauze and thoroughly clean the 

electrode surface using such gauze so that any contamination such as oil and grease 

is completely removed. Then wash off any abrasives adhering to the electrode in clean 

running water.  

After polishing and cleaning, confirm that contamination has been completely removed.

 

The clean electrode surface must be uniformly wetted.

CAUTION

Polish the electrode surface (gold electrode) by following the instructions below when it has 

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.

(4)   Installing the Indicator Electrode 

Hold the gears so that the drive shaft does not turn, and sufficiently screw the electrode into 

the shaft. During installation, be careful not to touch the electrode surface.

Note: Polish the electrode surface again if you have touched it.

Summary of Contents for FC400G

Page 1: ...User s Manual Model FC400G Free Available Chlorine Analyzer Non Reagent Type Style S2 IM 12F5A1 01E IM 12F5A1 01E 5th Edition ...

Page 2: ...ormed or adhered to could result in damage to or destruction of part or all of the product n 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 sui...

Page 3: ...ement verify that these factory default settings meet the operating conditions and if necessary reconfigure parameters For details of setting data refer to chapters 5 and 6 When user changes the operation parameter it is recommended to note down the changed data n Symbol Marks Throughout this user s manual you will find several different types of symbols are used to identify different sections of ...

Page 4: ...ranty 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 suppl...

Page 5: ...Blank Page ...

Page 6: ...able Chlo rine Analyzer 2 3 2 2 Characteristics 2 3 2 3 Model and Codes 2 4 2 3 1 Free Available Chlorine Analyzer Non Reagent Type 2 4 2 3 2 Sampling System 2 5 2 3 3 Spare Parts 2 6 2 4 Dimensions 2 7 3 INSTALLATION PIPING AND WIRING 3 1 3 1 Installation 3 1 3 1 1 Installation Site 3 1 3 1 2 Mounting 3 1 3 2 Piping 3 2 3 2 1 For Use without a Sampling System 3 2 3 2 2 For Use with Dedicated Samp...

Page 7: ...lling with Ceramic Beads for Electrode Polishing 6 1 6 1 3 Supplying Sample Water 6 2 6 1 4 Polishing the Indicator Electrode 6 2 6 1 5 Supplying Power 6 3 6 1 6 Checking Electrode Mechanism Block 6 4 6 1 7 Filling Zero Water and Test Operation 6 4 6 1 8 Setting Operation Parameters 6 4 6 1 9 Calibration 6 4 6 2 Normal Operation 6 5 6 2 1 Maintenance during Normal Operation 6 5 6 2 2 Shutting Down...

Page 8: ... Check Maintenance Replacement of Driven Shaft Assembly 8 7 8 2 4 Check Maintenance Replacement of Motor and Gear Head 8 9 9 TROUBLESHOOTING 9 1 9 1 When failure is Indicated 9 1 9 1 1 Indication of Error Message or Error Code 9 1 9 1 2 Remedies When Errors Occurs 9 1 9 2 For the Case Where No Error Indication Appears 9 4 10 SPARE PARTS AND CONSUMABLES 10 1 10 1 Spare Parts and Consumables List 10...

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Page 10: ...gent use When you attempt to measure free available chlorine and the test solution contains combined chlorine there s an error which depends on the concentration of the combined chlorine To reduce the error in this sort of situation we recommend that you use the combined chlorine insensitive version of the Model FC400G that has been developed for this purpose Compared with the standard Model FC400...

Page 11: ...electrode The electrode mechanism block incorporates an indicator electrode rotating electrode counter electrode Pt 1000 Ω RTD built in silver chloride electrode and driving mechanism consisting of a synchronous motor that rotates the indicator electrode at a constant speed and a belt The converter s measuring circuit is housed together with an operation panel and external wiring connection termin...

Page 12: ...ed diffusion current value also changes with temperature and the current is automatically corrected using signals from the RTD Pt 1000 Ω built in the counter electrode The FC400G free available chlorine analyzer was designed to require minimal maintenance and uses no reagent However it must be understood that there are restrictions on the conditions of the water to be measured sample in comparison...

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Page 14: ...e measured temperature error applied voltage error converter error and temperature compensation range over Maintenance Any modes other than measurement MEAS mode Contact capacity 250 V AC max 1 A max 125 VA max resistance load 220 V DC max 1 A max 60 W max resistance load Main unit power OFF Main unit power ON During non operation In operation Event of Error Open Closed Open Maintenance Closed Ope...

Page 15: ...isplay interactive message and key operation request display Diagnostic function Excessive diffusion current value measured temperature error applied voltage error converter error temperature compensation range over zero point error slope abnormality and response error Functions settable executable during operation level Zero and span calibration selection of message area display content hold ON O...

Page 16: ...ng Korea Electromagnetic Conformity Standard 2 1 2 Dedicated Sampling System for Non Reagent Type Free Available Chlorine Analyzer Function Used for application having high pressure and large flow rate Refer to GS 12A00V02 01E 2 2 Characteristics display shows value relative to the upper limit of a range Repeatability 2 Linearity 5 Drift Zero drift 1 month Span drift 10 month Response time Approx ...

Page 17: ...A Optional specifications PPM SCT ST SPS CC Units in ppm With Tag Plate With ST401G Sampling system Note 1 With Teflon coated screws for protection from salt corrosion Combined chlorine insensitive version Note 1 Specified ST to use with sampling system Accessories Name Part No Q ty Remarks Polishing powder Alumina K9088PE 1 Bottle For cleaning of indicator electrode Ceramic beads Note1 K9332ZP 2 ...

Page 18: ... refer to GS 12F5A1 E When ordering option code ST integration into ST401G sampling system must be specified Note 2 4 wire type pH converter system refer to GS 12B7C1 E GS 12B07C05 01E GS 12B07B02 E GS 12J05C02 00E pH sensor PH8EFP 03 TN TT1 N T A when suffix code of PH4 PF4 specified PH8EFP 03 TN TT3 N T A when suffix code of PH4 PF4 and option code of TT3 specified PH8EFP 03 TN TT1 N G A when su...

Page 19: ... Part for electrode mechanism 1 Yearly Fuse A1111EF 2A 1 Yearly 2 Driven Shaft Assembly K9334JV Part for electrode mechanism 1 3 years O Ring Y9115XB Part for electrode mechanism 1 3 years Drive Belt L9804UK Part for electrode mechanism 1 3 years Motor Assembly 100 V K9334JY Part for electrode mechanism 1 3 years Motor Assembly 110 V K9334VQ Part for electrode mechanism 1 3 years Motor Assembly 20...

Page 20: ...nnection 3 ø10 5 holes for wall mounting JIS A15 plastic water proof plug or equivalent Drain outlet ø15 hose coupling Measuring tank Needle valve Sample inlet Rc1 4 2B Pipe Stanchion F2 1 5E ai Approx 150 292 144 92 16 5 35 35 29 35 154 Approx 50 Approx 110 276 Approx 160 110 135 48 Figure 2 3 Dimensions of the FC400G Free Available Chlorine Analyzer ...

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Page 22: ...y maintenance access and 7 allows drainage 3 1 2 Mounting The FC400G Non Reagent type Free Available Chlorine Analyzer mounts vertically or horizontally on a sturdy pipe JIS 50A using U bolts see diagram To mount it on a plate or wall drill M8 size holes separated by 70 mm for the U bolt holes Where necessary use a sampling system to regulate the pressure and flow of the measurement liquid Normall...

Page 23: ...le water inlet Connect a Ø22 X Ø15 mm flexible mesh reinforced tube to the drain outlet from the measuring tank Install this tube so that no water entrapment is formed Entrapment of water in the drain tube may cause overflow from the measuring tank F3 2e EPS Electrical connections JIS A15 plastic water proof plug or equivalent Drain outlet Ø22 x Ø15 mm hose coupling Measuring tank Sample inlet Rc ...

Page 24: ...VP40 φ6 φ4 Polyethylene tube PR1 Pressure reducing valve FCC Free available chlorine converter FCD Free available chlorine detector NV1 Needle valve BV1 Ball valve NV1 FCC X VP16 Measuring water FCD BV1 PR1 PVC tray φ12 φ9 Polyethylene tube Piping diagram of ST401G FC4 N A AZC With auto zero calibration for free available chlorine analyzer VP40 Drain BV2 NO COM NC F1 SV1 X NV1 FCC X VP16 Measuring...

Page 25: ...connected to wiring terminals M3 screw in the converter 1 Be sure to ground the case ground terminal M4 screw or if this is not possible then connect to G of power wiring Avoid two point ground Case is connected to signal ground inside converter 2 Use cable with 9 to12 mm OD 3 Use two core shielded cable with 9 12 mm OD To avoid two point ground connect shield to ground at one end only 4 Contact i...

Page 26: ...r analog output signals use a two core shielded cable with a finished O D of 9 to 12 mm Process the end of the cable to be connected to the converter as follows 1 Remove insulation covering and shield from the cable up to approx 40 mm from the end of the cable Solder a lead wire to the root of the exposed shield and protect the soldered area by wrapping with insulation tape 2 Cut the lead wire to ...

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Page 28: ... Holds the counter electrode Gear head Terminal block for Rotating contact Drive shaft Driven shaft The driven shaft is connected to the indicator electrode by a belt and drives it The signal from this indicator electrode passes through commutator and Rotating contact Rotating contact Ceramic beads Polish the indicator electrode to maintain the clean surface of the indicator electrode Measuring ta...

Page 29: ...n level indicating panel Operation keys Keystroke in operation level can be accomplished with the case cover installed Figure 4 2 Converter Parts Names with the Cover Closed F4 3e ai Setting level indicating panel Setting level Operation level selector switch Figure 4 3 Converter Parts Names with the Cover Opened ...

Page 30: ...ystroke in this level can be accomplished with the converter case cover installed The setting and service levels are used to select a function and set data Function selection and data setting are generally made once before starting operation Also inadvertent change of such selection or setting should be prevented operation keys used for the setting level or service level cannot be externally acces...

Page 31: ... voltage set number of steps 5 SERVC Enter service level code refer to Sec 4 2 3 4 2 3 Modes in Service level Enter the setting level using key Then press the NO key to call the SERVC mode and press the YES key to enter the service level The service level has the following codes required to set various data Code 01 TEMP Selects C or F 02 FAIL Selects temperature compensation range exceeding fail O...

Page 32: ...y indicator 5 1 Operation Keys CONTACTS FAIL MAINT WASH CAL CELL ENT YES NO MODE 1 2 3 4 1 3 5 F5 1e ai YES NO MODE ENT 1 Used to respond to a message by pressing YES or NO 2 Used to select to operation mode from measurement mode or to return measurement mode from modes of each level 3 Used to set data 4 Pressing this key sets an entered value 5 Used to select the setting level from MEASURE mode m...

Page 33: ...as been selected If the pointer blinks it indicates that the FC400G is not yet in that mode Modes in the Operation Level Message Indicator Displays data other than the measured concentration value and messages required for interactive operation Note Appearance of at the head of a message means that the FC400G is in the setting service level Operation Key Indicator Indicates key s required for inte...

Page 34: ...YES NO Requesting the or key Inquiring whether to enter the CAL mode 5 3 2 Key Operation When ENT Indication Blinks If the ENT indication blinks in the operation key indicator data entry is required corresponding to the message displayed in the message area Use the key to shift the blinking along digits in the data area increase the value of a blinking digit using the key and finally set it using ...

Page 35: ... 5 Key Operation and Display 5 4 IM 12F5A1 01E Example of Data setting using the and keys ENT ENT ENT ENT F5 4e ai ...

Page 36: ...CAL HOLD F5 3 3e ai Not in hold status In hold status Note Pressing the key allows the hold status to continue Note 5 3 4 Transfer to the Setting Level Unscrew four fixing screws to remove the converter case cover Press the key to select the setting level from measurement mode To return from the setting level to the measurement mode in the operation level press the or MODE key However if the FC400...

Page 37: ...from the service level to the measurement mode in the operation level press the MODE key However if the FC400G is in the hold status transfer to the measurement mode is disabled and the FC400G returns to the HOLD mode Example YES NO HOLD MEASURE OUTPUT MODE NO HOLD F5 3 5e ai SERVICE YES NO MODE ENT YES NO NO YES ENT x 3 SERVICE MODE Not in hold status In hold status is available In hold status is...

Page 38: ... A A MEASURE MODE NO YES MODE NO YES MODE NO YES MODE NO YES F5 4 1e ai Measurement mode Operation level Calibrate For the description of the CAL mode see item 2 in 5 4 1 For the description of the DISP mode see item 3 in 5 4 1 To To Select message display Set cancel hold For the description of the HOLD mode see item 4 in 5 4 1 For the description of the CELL mode see item 5 in 5 4 1 Turn ON OFF C...

Page 39: ...sensitivity initialization is set to ON in service code 08 Note For calibration upon replacement of the indicator electrode select CHANGE and then conduct calibration This causes Slope is not rewritten to 1 00 If Slope is not rewritten select NO CHNG or set service code 08 to OFF Set a standard chlorine solution concentration value using the or key MEASURE or HOLD YES At pressing the YES key cause...

Page 40: ...µA applied voltage V output slope SL or zero point ZR can be displayed NO HOLD YES YES YES YES YES YES YES 0 99SL DISP 25 0 C 3 00 µA 0 10 V 10 0 0 02ZR NO MEASURE F5 9e ai Temperature display Diffusion current display Applied voltage display Output current Slope display Relative sensitivity with respect to initial electrode sensitivity set in service code 08 Zero point display Diffusion current v...

Page 41: ...ress the YES key to set the HOLD mode or the NO key to cancel it In the hold mode the LCD displays the HOLD indication NO NO CELL YES YES HOLD HOLD ON MEASURE F5 10 1e ai Hold cancel Hold setting 5 CELL Cell Motor ON OFF Mode Press the MODE key and select the CELL mode using the YES NO key Select ON or OFF with CELL ON displayed press the YES key to turn the motor ON or NO key to turn it OFF NO NO...

Page 42: ...d parameter Enter service code No Enter the washing mode Enter the plateau mode Note 1 Enter the servise level To In hold status Service level Note 1 WASH may be displayed as AZ CAL depending on setting Corresponds to mode code in Sec 4 2 3 Service Mode 09 WA CA Washing Auto zero Calibration selection For the description of code 01 see item f in 5 4 2 For the description of code 07 see item f in 5...

Page 43: ...setting When remote range switching is ON b SET HD Hold Parameter Setting Mode Press the key to enter the setting level and press the NO key to select SET HD Pressing the YES key with HLD ON displayed causes the FC400G to enter calibration setting level and service level automatically holding output Pressing the YES key with HLD OF displayed cancels holding of output When HLD ON is selected select...

Page 44: ...y at the TIMER display T OFF and T ON options are displayed select T ON to start auto wash For the standard model without auto wash option or to turn auto wash off select T OFF For the timer function set washing intervals INT H unit hr washing time WT min unit min and relieving time RT min unit min Manual washing starts by pressing NO key with TIMER displayed and then YES key with START displayed ...

Page 45: ...d charcoal filter and help prevent poisoning of the filter automatically wash the filter with zero water once a day Note The previously selected status is displayed e PLAT Plateau Mode Press the key to enter the setting level and press the NO key to select PLAT Press the YES key with MEAS displayed When the plateau characteristic collection performs enter YES key again In the plateau characteristi...

Page 46: ...ount Display all steps in turn Measure all steps NO f SERVC Service Level Enter the YES key at SERVC displayed CODE appears and enter the service level Enter codes 01 02 04 05 07 08 and 10 needed for setting various parameters in the service level Note Never attempt to enter a code other than codes 01 02 04 05 07 08 and 10 If inadvertent entry is made immediately press the MODE key Entry of any co...

Page 47: ...y apply This causes effect whether it is set to either 0 or 1 0 0 1 PPM CT min 04 T SEC 05 NONLN T SEC F5 12 6e eps 0 1 0 0 7 0 NONLN 0 1 0 SERVC ENT ENT ENT Setting of determination parameter T SEC for calibration Setting of determination parameter PPM for calibration Setting of determination parameter CT min for calibration Note These parameters are also used in checking stability during plateau...

Page 48: ...refer to 6 3 3 5 Code 07 Setting Applied voltage Compensation Parameters 1 Collect the plateau characteristic of the sample water refer to 5 4 2 e PLAT Plateau Mode and determine the applied voltage value 2 Enter the value of 1 in Applied voltage compensation parameter start and press the key 3 Set Applied voltage parameter compensation slope to 0 00V µA and press the key Note Electrode sensitivit...

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Page 50: ... pour the ceramic beads provided in the accessory box into the beads case as follows before starting the FC400G The combined chlorine insensitive version uses glass beads Before operation ceramic beads are filled into the beads case of the detector How to fill the ceramic beads Unscrew two fixing screws at the bottom of the electrode mechanism block see Figure 6 3 to remove the measuring tank The ...

Page 51: ...with ST401G Sampling System The sample supply pressure should be 100 to 750 kPa and flow should be 0 1 to 10 l min Adjust flow using needle valve as described in 1 above Note Refer to the Instruction Manual IM12A0V2 E of the ST401G Sampling System 6 1 4 Polishing the Indicator Electrode The electrode surface of the indicator electrode must always be kept clean Polish the electrode surface as follo...

Page 52: ...inally 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 4 Installing the...

Page 53: ...water through the zero filter case before starting then attach zero filter and operate without turning on auto calibration After replacing the filter or when the normal calibration interval has been exceeded you needs to run the instrument in offline mode for a while to allow conditions to stabilize before turning on the Auto Zero Calibration functions Close BV2 and open BV3 ball valve Be careful ...

Page 54: ...ne or two weeks before regular scheduled maintenance is due to determine whether the scheduled maintenance interval should be shortened 6 2 2 Shutting Down then Restarting Operation The data in the FC400G is retained even when power is disconnected If it is to be stopped for a long period then power should be disconnected If power will continue to be supplied it s recommended that the cell motor b...

Page 55: ...de Output hold ON OFF selection ON HLD ON ON HLD ON OFF HLD OF Hold output value selection Value immediately preceding hold HD LST Value immediately preceding hold HD LST Fixed value HD FIX Setting of fixed value HOLD 50 0 0 0 to 100 0 WA CA Wash Auto zero Calibration Mode WASH Washing Mode Washing timer ON OFF selection Timer OFF T OFF Timer ON T ON Timer OFF T OFF Washing interval setting INT H ...

Page 56: ...e 05 NONLN Mode Selection of linear output two line segment output Liner output 0 Linear output 0 Two line segment output 1 Code 07 DRV V Mode Setting of applied voltage compensation parameter Start DRV V 0 10 V Note 1 1 50 to 1 50 V Setting of applied voltage compensation parameter Slope V μA 0 02 V μA Note 2 0 10 to 0 00 V μA Code 08 CHANG Mode Selection of electrode sensitivity initialization O...

Page 57: ... manually made in the HOLD mode in the operation level When the FC400G is in hold status appears on the LCD Note Selection of HLD OF in the setting level disables entry into the HOLD mode in the operation level Hold Output Value Selection when HLD ON is selected Select HD LST to set the value immediately preceding hold as hold output value or HD FIX to set a fixed output value preset value Setting...

Page 58: ...00 minutes 10 is the shipping time default setting Optimum values for these time settings depend on sample and measurement environment When setting auto zero calibration parameters zero filter flushing function will be activated by supplying zero water once in 24 hours to protect the corrosive of the activated charcoal filter The measured value is held HOLD lights and FLUSH blinking is displayed 1...

Page 59: ...a readout To collect plateau characteristic data select message MEAS and press the YES key Pressing the NO key with MEAS displayed causes the FC400G to enter READ Pressing the YES key again calls up the previously collected data in turn Setting Initial Applied voltage when MEAS is selected Set initial applied voltage INI V in the range of 1 00 to 1 00 V This parameter is set to 1 00 V at factory s...

Page 60: ... determine if electrode operation is stable during zero point and or span calibration If concentration changes by PPM mg l or more during T seconds even when the time elapses for CT minutes meaning that operation is unstable error indication is generated Setting T SEC Stability Check Time Set the stability check time T SEC in the range of 5 to 200 sec This parameter is set to 10 sec at factory shi...

Page 61: ...e V µA per 1 µA in the range of 0 10 to 0 00 V µA This parameter is set to 0 02 V µA at factory shipment Set to 0 01V µA in to decrease influence of combined chlorine insensitive version option 6 Code 08 Selecting Electrode Sensitivity Initialization ON OFF CHANG Mode Set this parameter to 1 only if you wish to rewrite the slope SL displayed in the message area selectable in the operation level DI...

Page 62: ...ended that electrode polishing be performed even when calibration is performed periodically during operation However electrode polishing can be omitted if the calibration interval is short and it can be determined that the electrode is not contaminated The characteristic readings of the indicator electrode are temporarily not stable immediately after polishing the electrode Therefore after electro...

Page 63: ...1e ai Electrode mechanism block Measuring tank Fixing screws 2 pcs In maintenance position Counter electrode reference electrode Indicator electrode rotating electrode Beads case Ceramic beads Beads case cover The bottommost notch of the beads case Figure 7 1 Electrode Mechanism Block in maintenance 3 Select CAL mode ZERO displayed on message display Note If Service Level code 08 is set to 1 for i...

Page 64: ...yed Refer to Sec 7 4 for a description of how to fix the problem 6 Exiting Zero calibration Confirm that a normal ZR END rather than an error message then press the YES key Pressing the YES key switches the display to SPAN After stopping the indicator electrode revert the electrode to its position in the measuring tank After fixing the electrode mechanism block to the measuring tank restart electr...

Page 65: ...ibration contact output 1 Output hold and Maint contact T1 Auto zero calibration interval T2 Auto zero calibration setup time T3 Auto zero calibration time varies depending on conditions T4 Auto zero stabilization settling time of sets stability determination parameter 1 WASH CAL lamp blinks 5 2 Display Content on the Display Unit and W1 W2 of Figure 3 4 are operated T1 T1 T1 T2 T3 T4 T2 T3 T4 OFF...

Page 66: ...val is reduced to less than one day Zero filter flushing timer is ON and Wash Auto zero calibration setting is changed to Wash NOTE 1 During zero filter flushing if Auto zero calibration is started then zero filter flushing is aborted 2 If the zero filter flushing counter reaches its count up setting while the instrument is in auto zero calibration mode zero filter flushing is cancelled 3 During z...

Page 67: ... Using Sampling Method Span calibration using the sampling method can be performed as follows 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 Start span calibration at the point when zero calibration using the method in Sec 7 2 1 or 7 2 2 is finished and SPAN is ...

Page 68: ...and 50 milliliters of NaCl per one liter of pure water Calibration requires 2 to 3 liters of dilution solution Prepare a standard solution by diluting the sodium hypochlorite solution using the dilution solution so that the free chlorine concentration is approx 80 of the output range Notes To prepare a standard solution sample water may be used instead of dilution solution To prepare a span calibr...

Page 69: ...rs again refer to Sec 9 1 and remove the cause of the error and then perform calibration Note When an error occurs the concentration value based on the calibration data is displayed Also the error message and FALL remain displayed in the MEASURE mode These indications will not disappear unless the cause is removed NOTE Slope error Err 5 generated when span calibration is performed using manual ana...

Page 70: ...he electrode surface must be polished using abrasive alumina to remove such contamination before measurement error exceeds the allowance Polishing frequency differs with the quality of the sample water Polishing every a few months may be sufficient in some cases However in general it is recommended that the indicator electrode be polished every month For polishing procedure follow Sec 6 1 4 when t...

Page 71: ...tion such as oil and grease is completely removed Then wash off any abrasives adhering to the electrode in clean running water After polishing and cleaning confirm that contamination has been completely removed The clean electrode surface must be uniformly wetted CAUTION Polish the electrode surface gold electrode by following the instructions below when it has become corrugated or deformed from t...

Page 72: ...ciently wash the beads with water 6 Clean beads case and beads case cover For the beads case and beads case cover clean both in the same manner as measuring tank cleaning in item 4 Note The beads case cover may turn whitish during prolonged use however it causes no functional problem 7 Set the beads case cover onto the beads case and pour the cleaned ceramic beads into the beads case If the beads ...

Page 73: ... life If conditions of use or environment are outside of specifications their life may be shorter than would otherwise be expected Periodically check whether electrode mechanism block is operating normally To check if abnormal or not refer to Main Check List for a simple check whether calibration and the like is abnormal refer to Auxiliary Check List Alternate these checks for best results When su...

Page 74: ...Store it in room temperature and keep it away from direct sunlight Checks and Maintenance Rotating contact does not need inspection Never contact the rotating contact except when the replacement is performed Replacing the Rotating contact If they are replaced by the customer follow the steps below 1 Shut off the power fed to the free available chlorine analyzer to stop the operation Gear head Term...

Page 75: ...alyzer 8 2 2 Check Maintenance Replacement of Drive Belt When you polish the indicator electrode and remove the electrode mechanism block cover for maintenance check the drive belt as follows once in three months recommended Check for powder from drive belt friction deposited on motor mounting plate and the like As the drive belt ages and the mating of the teeth on the pulley with the teeth on the...

Page 76: ...socket of the driven shaft to stop it from rotating Disconnect the three wires connected to the counter electrode next loosen and remove the clamp holding the electrode in its holder 3 Remove the drive belt Remove the drive belt with pulleys all together installed onto the drive shaft 4 Remove the rotating contact out of the driven shaft 5 Remove the dust protection plate installed to prevent driv...

Page 77: ...ing plate and the belt tension adjuster plate as Figure 8 6 shows Hang the hook of a spring balance 1 00 kg on the hole in the driven shaft Make sure that all the temporarily tighten four screws are loose Draw the drive belt horizontally in the direction of the line that connects between the drive shaft and the driven shaft by a force of 4 N spring balance reading of 0 4 kgf With this tension kept...

Page 78: ...that the difference in speed of rotation between its normal status and when load is reduced by loosening screws fixing pulley to driven shaft is not noticeable If operation is still not satisfactory replace motor and gear head Replacement procedure Replacement of motor and gear head should in principle be carried out by Yokogawa service If you want to do it yourself the procedure is as follows In ...

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Page 80: ...ppears for approx 2 sec to inform the operator of incorrect data setting In this case set data does not update the previous set correct data again Table 9 1 Error Message List Error No Error Content Classification Err 1 Err 2 Diffusion current value exceeded Sample temperature error Occurs during measurement or maintenance Err 3 Reserved error code presently not used Err 4 Applied voltage error Oc...

Page 81: ...the presence of any of these If the error still fails to extinguish even when re calibration is made using a new calibration standard solution or after the indicator electrode has been polished using alumina the indicator electrode must be replaced Err 6 Zero Point Error Err 6 appears if the zero point exceeds 1 00 µA when the zero point is confirmed during calculation in zero calibration Chlorine...

Page 82: ...error is generated if the mg l or ppm value for 100 signal output falls below 1 00 mg l or 1 00 ppm in the OUTPU mode in the setting level If this error message appears the relevant data will not be updated Set correct value again NOTE 03 Input Data Setting Error This error is generated if the mg l or ppm value for 100 signal output is set to a value below the value for 50 signal output when two l...

Page 83: ...rcoal filter 3b Piping related to auto zero calibration is blocked Measured value fluctuates largely 1 Indicator electrode does not rotate at constant speed 2 Insufficient continuity at the electrode mechanism block 1 Check if the set screws have loosened Check if the belt driven shaft assembly is normal If not replace them 2 Replace the rotating contact Measured value does not vary 1 Measuring ta...

Page 84: ...trode mechanism block 1 3 years Motor Assembly 200 V K9334VR Part for electrode mechanism block 1 3 years Motor Assembly 220 V K9334VS Part for electrode mechanism block 1 3 years Gear Head 100 V 110 V K9332JP Part for electrode mechanism block 1 3 years Gear Head 200 V 220 V K9334VA Part for electrode mechanism block 1 3 years Activated Charcoal Filter L9862AY For zero calibration 1 Yearly 1 Alth...

Page 85: ...that this has been done If not apply silicon grease as follows You can purchase 3 ml tubes of conductive silicon grease from Yokogawa the part no is K9044FX Be careful not to get this grease on the outer surface particularly the gold surface Apply a small quantity half a drop of grease to a small flat screwdriver about 3 mm wide blade and apply to three equidistant places around the tapped hole ab...

Page 86: ...y K9334JV The two bearings on the driven shaft assembly are to ensure that it rotates smoothly The bearings will be worn gradually and so should be replaced after approximately three years operation Replacement should in principle be performed by Yokogawa Note It is recommended that the O ring Part no Y9115XB in the electrode holder in the driven shaft assembly should also be replaced at the same ...

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Page 88: ...opyright 2019 Yokogawa Electric Corporation Subject to change without notice Model FC400G Free Available Chlorine Analyzer CMPL 12F05A01 03EN 1st Edition Apr 2019 YK Converter Detector 1 CONVERTER Item Part No Qty Description 1 A1111EF 1 Fuse 2A Style S2 ...

Page 89: ...V AC power supply 17 Y9114XB 1 O Ring K9334VR For 200 V AC power supply 18 K9332KR 1 Cock Assembly K9334VS For 220 V AC power supply 19 Y9110XB 1 O Ring 4 1 Capacitor 20 K9332KP 1 Insert K9334LK For 100 V AC power supply 21 L9831KL 1 Nut K9332JS For 110 V AC power supply 22 L9831KN 1 Sleeve K9334LP For 200 220 V AC power supply 23 K9332KZ 1 Beads Case Cover 5 K9334KD 1 Cable 24 1 Beads 6 K9332SR 1...

Page 90: ...ectrode P 6 7 Some revision of Table 6 2 Setting Item List P 6 10 Some revision of Figure 6 5 P 6 11 to 6 12 Some revision of 6 3 3 Setting in the Service level P 8 1 to 8 2 Some revision of 8 1 1 Polishing the Indicator Electrode P 8 4 Some revision of Figure 8 4 P 8 5 Some revision of Figure 8 5 P 8 6 Some revision of 8 2 2 Check Maintenance Replacement of Drive Belt P 8 7 to 8 8 Some revision o...

Page 91: ...ii IM 12F5A1 01E n 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 ...

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