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Maintenance

48

Maintenance of sensor

This section describes the maintenance procedure for a general residual chlorine sensor.



Checking the flow rate of the sample

For the residual chlorine sensor, measured data is affected by the sample flow rate. If the flow
rate decreases due to clogged piping or the like, the reading may become lower. Be sure to
check the flow rate of the sample that comes to the measurement cell. The procedure for
checking the flow rate is shown below.



Liquid level in the overflow cell

For the RA-10, the flow rate can be checked by the liquid level in the overflow cell.
Use this method along with the following bead motion:



Method of bead motion

It is possible to adjust flow rate by observing bead motion.



Method using a flowmeter

Flow rate can be checked by a flowmeter installed inlet or outlet of the RA-20.

Insufficient flow rate

Over flow rate

Correct flow rate

Insufficient flow rate

Over flow rate

Correct flow rate

h19136 | UTC 2020/03/30 3:34:51

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Summary of Contents for HR-200

Page 1: ...Residual chlorine meter HR 200 Instruction Manual CODE GZ0000230909G h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 2: ... warranties set forth herein shall be extended Any malfunction or damage attributable to improper operation Any malfunction attributable to repair or modification by any person not authorized by HORIBA Advanced Techno Co Ltd Any malfunction or damage attributable to the use in an environment not specified in this manual Any malfunction or damage attributable to violation of the instructions in thi...

Page 3: ...umulators under the Directive 2006 66 EC in the European Union The symbol might be put with one of the chemical symbols below In this case it satisfies the requirements of the Directive 2006 66 EC for the object chemical This product should not be disposed of as unsorted household waste Your correct disposal of WEEE waste batteries and accumulators will contribute to reducing wasteful consumption ...

Page 4: ... reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in ...

Page 5: ...o be limited to the most extreme situations This indicates a potentially hazardous situation which if not avoided could result in death or serious injury This 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 Description of what should be done or what should be followed Description of what s...

Page 6: ...n load e g a motor or a pump be sure to use a power relay rated higher than the load rating Caution strong acid If nitric acid gets into the eye irritation of the mucous membrane and even blindness may result In handling nitric acid be sure to use protective goggles and mask If nitric acid gets into the eye immediately rinse it out with plenty of water for more than 15 min and then get medical car...

Page 7: ...hen cleaning the measurement cell take care not to damage the brown colored parts on the anode electrode and the reference electrode The surface of the reference and anode electrode will be reduced into silver if the electrodes are exposed to the direct sunlight Avoid direct sunlight to the sensor unit Avoid scratch and dirt on the gold surface of the cathode electrode The dirt on the gold will af...

Page 8: ... to refer for information Tip This indicates reference information Term definition This document uses the following terms as defined Term Definition Hold down Maintain pressing a key until the indicator turns ON or the display changes Press Lightly press only one time Flash Quickly flash several times indicating that the setting has been finished ー亡ニコ h19136 UTC 2020 03 30 3 34 51 C O N F I D E...

Page 9: ...stallation environment 12 Installation method 13 Converter 13 Installing the measurement cell 14 For installation on the pole optionally available 15 Piping procedure 16 Piping for sample inlet 16 Piping for sample outlet in the case of RA 10 16 Example of recommended piping 17 Wire connection 19 Power supply 20 Contact output 21 Transmission output 21 Contact input terminals and flow switch input...

Page 10: ...cathode electrode 53 Cleaning of measurement cell 54 Cleaning the overflow cell RA 10 55 Replacing the filter option 55 Pausing the analyzer 56 Restarting the analyzer from the pause mode 56 Calibration 57 Troubleshooting 61 Problems on measurement 61 Measurements exceeding the measurable range 62 Error codes 63 Description of error codes 63 Remedial actions for error codes 64 Data 66 Specificatio...

Page 11: ... 75 Electrochemical cleaning capability 77 Parts list 78 Optionally available parts 78 Spare parts 78 Disposing of the instrument 79 Converter 79 Overflow integrated sensor 81 Inline sensor 82 Quick reference appendix 83 h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 12: ...h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 13: ...ank The RA 20 is in line type sensor that can measure pressurized sample with a constant flow valve outside Features The converter has a splash proof construction compliant to IP65 Simultaneous temperature display can be selected All settings can be operated using the front keys Improved maintenance self diagnostic function Free setting transmission output range Nonvolatile memory Easy to view dis...

Page 14: ...s In addition check this product for any damage If you found any failure consult a distributor Breakdown of complete set The detector is separately packed Converter 1 U bolt 2 U bolt 2 M8 nut 4 Spring washer 4 Flat washer 4 Instruction manual this book 1 コパ h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 15: ... 10 RA 20 Display Cable gland Front cover 190 180 Unit mm Overflow cell Sample outlet Measurement cell Sample inlet OUT IN 303 258 Unit mm Sample outlet Sample inlet Inline cell Measurement cell 173 258 OUT IN Unit mm 訳 h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 16: ...ce 500 or more 424 376 Converter Sensor RA 10 Sample inlet Filter Sample outlet Flow switch Sampling valve Flow switch Sensor RA 20 Sample outlet Filter Constant flow valve Sampling valve Sample inlet Converter 359 1700 1286 190 207 102 1450 1177 622 91 164 169 OUT IN Maintenance space 500 or more Maintenance space 500 or more Maintenance space 700 or more Unit mm 732 Regulator h19136 UTC 2020 03 ...

Page 17: ...can be used Purge air is supplied through this inlet to prevent internal corrosion Usually no air con nection is required Cable gland Hood Hood for outdoor installation Front cover Purge air inlet Screw cap Remove a cap to access the screw When the 4 screws are removed the front case can be opened Front case screw 6 function keys Operation keys Front case With front cover opened l L 一 h19136 UTC 2...

Page 18: ...minal Contact input terminal Flow switch input terminal Contact output terminal Power connection terminal Power switch Fuse box 匹互好1 o e e 鳳瓢凪 n r n r n ト _ QD DD D _ l m a L 謳器IZ E R O A D J S P A N O f l Qs e c 編釦十r r r r d a y r r mv m o o o o o o 翫 M O D E M E N U S E L E C T I I 0 0 E S C H O L D C A L l J l l h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 19: ...d to abrasively clean the sensor surface by shooting out beads while exposing the cathode electrode surface to the sample at a constant flow rate 6 Stop valve flow control valve This valve stops or controls sample flow to the residual chlorine sensor Note For the overflow type RA 10 adjust the flow rate of the sample at 1 3 L min to 2 0 L min For the inline type RA 20 adjust the flow rate of the s...

Page 20: ...cing the sensor cathode electrode page 53 13 Cleaning beads These beads are used to abrasively clean the cathode electrode surface Reference Refer to Initial setup page 26 Refer to Replacing the cleaning beads page 51 14 Sensor cap This cap is used to fasten the cathode electrode to the measurement cell To replace the cathode electrode remove the sensor cap draw out the sensor holder and then repl...

Page 21: ...anceled Hold down Holding down this key in the hold mode will enter the measurement mode HOLD hold Hold down Holding down this key in the measurement mode will enter the hold mode Holding down this key in the hold mode will enter the measurement mode CAL calibration Hold down When this key is held down until the CAL indicator lights up the span calibration mode becomes active key key select Used t...

Page 22: ... When the flow switch is connected to the input terminal the contact is short circuited At this time the EXT2 indicator on the display part is illuminated CLN indicator Illuminated during the cleaning process FAIL indicator Illuminated when the FAIL signal is output via the relevant contact System error indicator Turns ON when system error E 90 E 91 or E 92 occurs Sensor error indicator Turns ON w...

Page 23: ...check menu Refer to page 45 Refer to page 43 Refer to page 33 Chlorine Zero Span calibration and temperature calibration can be performed Prior to operation this menu allows you to set all the measurement related parameters such as the detector information input and the assignment output Hold mode This menu checks the function of LCD relays and transmission outputs The set values can be reset to t...

Page 24: ...be minimal The location should have adequate space to allow maintenance and wire connecting work The location should be free from dust and corrosive gas The location should be minimally affected by an electromagnetic fields The altitude should be no more than 2000 m The power supply voltage should fall within the range from 100 V to 240 V AC 10 Sensor The location should have adequate space to all...

Page 25: ...erter is installed on the pole 50 A or the wall Spaces for opening the front case are required Installation on a pole Installation on a wall Unit mm 270 120 50 Unit mm 71 4 10 11 hole 220 I n l I D 口辿 h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 26: ...he measurement can not be maintained For installation on the wall To install the measurement cell on the vertical wall use the holes in the base shown in the following figure and also M8 bolts RA 10 overflow type RA 20 inline type Unit mm Front Rear Upper maintenance space 700 or more Lower maintenance space 1000 or more 2 10 70 Unit mm Upper maintenance space 500 or more Lower maintenance space 1...

Page 27: ... figure To install the pole stand use M10 anchor bolts or the like so that the pole stand does not fall down Note Install the pole vertically The beads cleaning is affected by leaning of the cell the normal condition for the measurement can not be maintained Unit mm 60 5 50 A 1500 Unit mm Maintenance space 500 or more Maintenance space 500 or more Maintenance space 700 or more Front Unit mm 25 4 1...

Page 28: ...be frozen If the sample might be frozen provide a countermeasure for freezing to the sampling pipe and measurement cell Piping for sample outlet in the case of RA 10 Proper piping procedure 1 Make the piping end open air and minimize the piping length so that no back pressure is applied 2 If the distance to the drain becomes long provide an open air portion and horizontally carry out piping with a...

Page 29: ...ce maintenance of the reference electrode for refilling KCl solution Filter option Install a filter cartridge on the sampling line if the sample includes suspended solid Install a valve upstream to replace the string wound filter Main line Sample inlet 1 3 L min to 2 0 L min Filter option String wound filter RA F 100 m Flow switch option Converter HR 200 Converter HO 200 Converter HP 200 pH ORP op...

Page 30: ...he main line can be back to the downstream of the main line or discharged at a higher tank Do not return the sampled water for the waterworks or drinking Note Adjust flow rate to the RA 20 at 0 8 L min Flowmeter option When the flow rate of the sample decreases below the specified value the residual chlorine meter shows a great negative measurement error Use a flowmeter to check that the proper fl...

Page 31: ...f the HR 200 Connection terminal diagram Note The screws on the front case and the terminal block are structurally prevented from coming out When mounting the terminal turn the screw to CCW direction until it is pushed up Wipe off water drops before opening front case Communication terminal Flow switch input terminal Transmission output terminal M3 5 Power terminal M4 Sensor terminal M3 Contact ou...

Page 32: ...nding cable Instructions for grounding Avoid grounding near the ground of noisy electrical apparatus WARNING If there is a possibility of a lightning strike install an arrester on the output side of the converter and on the side of receiving instruments Electric shock hazard Be sure to check that no electric power is supplied before starting the procedure WARNING Electric shock hazard Be sure to g...

Page 33: ... for the contact input and the transmission output are M3 5 The applicable electric wire is 2 mm2 AWG 14 max For the transmission output cable use a shielded cable WARNING To connect a load greater than the contact capacity or an induction load e g a motor or a pump be sure to use a power relay rated higher than the load rating WARNING If there is a possibility of a lightning strike install an arr...

Page 34: ... on the side of receiving instruments To terminate the cable strip the covering at the end by 11 mm and then connect the stripped end to the terminal Note Contact resistance should be less than 100 For the flow switch input use a dedicated shielded cable Tip When the contact input terminals are short circuited the EXT1 indicator on the display part lights up The flow switch will be closed while wa...

Page 35: ... off 11 mm of the insulating coating from the leading end and then connect the exposed wires to the terminal For the terminal device on the RS 485 communication line use a terminal resistor Rt 120 RS 485 communication protocol The RS 485 communication conditions are shown below Reference For details refer to communication specifications separately provided RS 485 communication output Terminal trea...

Page 36: ... mistakes in matching between terminals A Anode terminal brown R Reference electrode terminal red K Cathode terminal orange EC Electrical cleaning electrode terminal yellow T T Temperature compensation terminals blue and green E Shield terminal black HR 200 A Anode electrode terminal brown R Reference electrode terminal red K Cathode electrode terminal orange EC Electrical cleaning electrode termi...

Page 37: ... HR 200 A Anode electrode terminal brown R Reference electrode terminal red K Cathode electrode terminal orange Temperature compensation terminals green Temperature compensation terminals blue Shielded terminal black Flow switch option Residual chlorine sensor EC Electrical cleaning electrode terminal yellow RA 10 20 RA FS10 20 CT 20CR RA CT Red To terminal A Blue To terminal R Yellow To terminal ...

Page 38: ...below Make any changes if necessary in accordance with the instructions given in Setup menu page 33 Table 1 Items for initial setup Display Item Description Setting range Initial setting Refer to page PArA Parameter setting 33 dF Moving average count damping factor setting Increase dF to reduce variations in the measured values decrease dF to speed up the response it can be changed during measurem...

Page 39: ...y the contact output delay time in seconds after alarm or holding status occurs 0 to 600 s 0 s 35 FAiL Error alarm FAIL output setting RF 35 F Sc Setting self checked sensor error for FAIL Specify the sensor error E 75 is output from the FAIL contact or not yES no no 35 F oF Setting over full scale for FAIL Specify the over full scale error is output from the FAIL contact or not yES no no 35 F tE ...

Page 40: ...t value 10 0 to 110 0 C 100 0 C 37 b out Transmission output 2 burnout hold setting Specify the output during burnout of transmission output 2 non out 4 out 20 non 37 CLn Cleaning operation setting Reference Refer to Electrochemical cleaning capability page 77 37 StArt Specifies whether cleaning is performed when the power is turned ON Specify whether or not to perform cleaning when the power is t...

Page 41: ... HOLD or ESC Note Prior to measurement be sure to calibrate the sensors Refer to Calibration page 57 The measurable range of residual chlorine is between 0 00 mg L and 3 00 mg L Any measured value that falls outside this range blinks when displayed The measurable range of temperature is between 0 0 C and 50 0 C Any value exceeding this range is not displayed when Range Cut is set to yES When Range...

Page 42: ...ble options page 38 When non is set in Specifies a contact output type r1 r2 Relay setting condition screen the numeral at the lower left indicates the relay number Relay 1 is not in use Note shows no assignment Cleaning check screen Controlled value setup screen Cleaning Wait Time screen Cleaning operation check screen Setting change Establishes the value Cancels the value Display of zero calibra...

Page 43: ...CLn is selected Output during cleaning screen Shows that data is output during cleaning and during HOLD after cleaning Cleaning check screen Cleaning check screen Wait time before starting the automatic cleaning Displays the time before starting the next cleaning in a format of hours minutes seconds Note When the wait time is 10 h or more it is displayed in the format of hours minutes Cleaning tes...

Page 44: ...the accumulated time while the power is turned ON Moving average count check screen Moving average count check screen damping factor Used to check or specify the moving average count Note Allows you to change the value if the measured value is not stabilized If an error occurs during setup the setup screen will return to the previous display RC Residual chlorine Display Display condition Item Desc...

Page 45: ...qual to the output value specified in the setup menu Refer to Transmission output 1 setting page 36 Refer to Transmission output 2 setting page 36 Table 3 List of items displayed for the setting menu Display of vari ous settings Setting change Establishes the value Cancels the value Press HOLD or ESC for a while Setup menu Measurement mode Hold mode Press HOLD for a while Display Item Description ...

Page 46: ...hlorine display digit 0 1 0 01 Temperature display setting for sub display Specify whether or not to display the temperature on the sub display yES no Sub display setting Specify the item to be displayed when powered or returned to the measurement mode non No display r1 Displays an alarm value or assignment for relay 1 r2 Displays an alarm value or assignment for relay 2 t Displays a measured temp...

Page 47: ...a contact output type r1 r2 is set to CtrL AL or t Hi Lo Control value Specify the control value Note This is displayed when Specifies a contact output type r1 r2 is set to CtrL AL or t 0 00 to 3 00 mg L 0 0 to 100 0 C Control width Specify the control width Note This is displayed only when Specifies a contact output type r1 r2 is set to CtrL 0 02 to 1 00 mg L ON delay time Specify the contact out...

Page 48: ...n output value when transmission output 1 is in the hold mode HoLd Holds and outputs the latest value PrES Outputs the preset value HoLd PrES Transmission output 1 hold output value preset setting Holds the preset value Note This is displayed when Transmission output hold current hold setting for transmission output 1 is set to PrES 0 00 to 5 00 mg L Transmission output 1 burnout hold setting Spec...

Page 49: ... not to perform cleaning when the power is turned ON no Cleaning is not performed yES Cleaning is performed yES no Specifies whether cleaning is performed when the cleaning flow switch is reset Specify whether or not to perform cleaning when a flow error is reset no Cleaning is not performed yES Cleaning is performed yES no Setting for Electrochemical cleaning Electro chemical cleaning will be act...

Page 50: ...on the settings shown in gray Items with a check mark are available for selection Table 4 Control targets and their available options R1 R2 Description Function assignment of contact Specifies a contact output type r1 r2 non CtrL AL t HoLd CLn Control direction Control value Control width ON delay time 勺勺 h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 51: ... 2 SEt Specifies a control value 0 00 mg L to 3 00 mg L diFF Specifies a control width 0 02 mg L to 1 00 mg L AL Alarm output When the measured value is higher than the control point the alarm contact will be output subsequently to the on delay time When the measured value becomes lower than the setting the output immediately turns OFF canceling the alarm the above explanation is applicable to the...

Page 52: ... upper limit Lo Contact turns on when the value is below the lower limit SEt Specifies a control value 0 0 C to 100 0 C dt Specifies delay time 0 seconds to 600 seconds HoLd Contact to notice holding status When the measured value is held the output turns ON following the delay time When the hold mode is canceled the output is immediately turned OFF The settings include dt Specifies delay time 0 s...

Page 53: ... the preset value is output when off scale is categori zed in FAIL Measur edvalue burn out appears whenoff scale is categori zed in FAIL Measur ed value the latest value or the preset value is output when off scale is categori zed in FAIL Measur edvalue the latest value or the preset value is output only when FAIL signal outputis ON When error occurs E 21 to E 25 OFF holding contact will be ON whe...

Page 54: ...alibration OFF holding contact will be ON during hold mode OFF When error occurs E 90 to E 92 ON Status Contact Output r1 to r2 FAIL output Transmission output Diagnos ed error by self check F SC Measure d value out of full scale F oF Abnormal temperature F tE No flowing F FLo Transmission output 1 Transmission output 2 yES no yES no yES no yES no Without burnout With burnout Without burnout With ...

Page 55: ... in the measurement mode until the HOLD indicator turns ON 2 Use the arrow keys and select CAL for the calibration menu 3 Press ENT 4 Use the arrow keys to select the desired item displayed on the sub display 5 Press ENT Tip Hold down CAL in the measurement mode This allows you to go directly to the span calibration mode Calibration menu Display of various settings Setting change Establishes the v...

Page 56: ...asured data will be displayed The measured value blinks Wait until the measured value becomes stable Residual chlorine concentration input screen The sub display blinks Enter the concentration of residual chlorine in the liquid measured by the DPD method Changes the reference value ENT Establishes the reference value 0 01 to 5 00 mg L Screen to establish the calibration The sub display flashes to ...

Page 57: ...scription Screen to check the LCD Screen to check the LCD The whole LCD is illuminated allowing you to check the display Screen to check the output Screen to check relay output 1 ON OFF check of relay 1 r1 ENT Alternates ON and OFF Note When this mode becomes active the contact output turns OFF Screen to check relay output 2 ON OFF check of relay 2 r2 ENT Alternates ON and OFF Note When this mode ...

Page 58: ...d to the recorder or current meter to adjust the difference of interface Screen to check output of 21 mA 21 mA is output to transmission output 1 and 2 Note The current output can be selected by key The current output is connected to the recorder or current meter to adjust the difference of interface Screen to check output of 3 8 mA 3 8 mA is output to transmission output 1 and 2 Note The current ...

Page 59: ...ue is greatly different perform calibration Removal of sensor contamination Depending on the contamination level once or more per 3 months Wipe the cathode surface with soft cloth if the surface is coated Calibration is needed after manual cleaning of the cathode electrode Cleaning or replacement of mesh filter Depending on the contamination level Flow rate is not maintained if the mesh filter is ...

Page 60: ...e measurement cell The procedure for checking the flow rate is shown below Liquid level in the overflow cell For the RA 10 the flow rate can be checked by the liquid level in the overflow cell Use this method along with the following bead motion Method of bead motion It is possible to adjust flow rate by observing bead motion Method using a flowmeter Flow rate can be checked by a flowmeter install...

Page 61: ...mination Physical abrasion by beads and electrochemical etching clean the surface of the cathode electrode If the sensitivity becomes lower and you find any metal remained on the cathode clean up the cathode surface manually by the following procedure Cleaning the cathode electrode Operation 1 Check that the converter is OFF 2 Close the valve to shut off the sample 3 Loosen the sensor cap and take...

Page 62: ...gold pole surface 7 Install the sensor holder on the measurement cell and then close the sensor cap Before attaching the sensor holder clean up residual beads on the thread and O ring 8 Turn ON the converter 9 Wait until the reading becomes stable it takes 3 hours minimum 10 Perform calibration Refer to Calibration page 57 Cleaning the other electrodes It is not necessary to clean the anode refere...

Page 63: ...consideration Note All beads in a capsule should be transferred into the measurement cell pot If the amount of beads is not enough cleaning efficiency will be reduced Keep the O ring S30 for reuse when the bead cell is removed Used beads should be removed throughly and feed new beads for replacement Replacing the cleaning beads Periodically replace the cleaning beads about every three months Opera...

Page 64: ...steps are also applicable for replacing the beads Cleaning and replacing the mesh filter If the mesh filter is clogged flow rate will be decreased and proper measurement will be canceled Periodically check or replace the mesh filter Operation 1 Loosen four M4 screws located on the top of the overflow cell and then pull the measurement cell straight down Hold the measurement cell to avoid falling w...

Page 65: ...gh this frequency varies depending on water quality and operating conditions Replacement of the electrode requires no tools and can be carried out easily by the customer This section describes the procedure for replacing the cathode electrode Operation 1 Check that the converter is OFF 2 Close the valve to shut off the sample 3 Remove the sensor cap and take out the sensor holder Before attaching ...

Page 66: ...ed by the air in the nozzle stop flow once and supply again or poke a bar into the nozzle to remove air Cleaning of measurement cell Periodically clean the measurement cell as water stains will adhere to its inside over time Operation 1 Turn OFF the converter 2 Close the root valve to shut off the sample 3 Remove the measurement cell the beads cell the sensor holder etc 4 Clean the inside of the m...

Page 67: ...e inside of the overflow cell using soft cloth or a soft brush Replacing the filter option As dirts on the filter may trap residual chlorine and decrease concentration measured data will be affected Periodically check and replace the filter Operation 1 Turn OFF the converter 2 Close the root valve to shut off the sample 3 Loosen the housing and then pull it down 4 Replace the cartridge in the hous...

Page 68: ...ds page 51 3 Slowly open the valve for the source of water under measurement Note Open the sampling valve with care Sudden opening will disperse beads to the any part out of the circulation path in the measurement cell For the RA 10 Sampling flow rate 1 3 L min to 2 0 L min Sampled water should be overflowing from the head tank If the water surface in tank is under the over flow level flow rate wi...

Page 69: ...alibration Reference When the hold mode is selected the transmission output becomes the value specified on the setup menu Refer to Transmission output 1 setting page 36 Refer to Transmission output 2 setting page 36 Tip The span calibration mode can be made active directly by holding down CAL in the measurement mode Enter the calibration mode from the measurement mode Operation 1 Hold down HOLD in...

Page 70: ...bration will start with the measured value blinking on the main display When the reading becomes lowered and stable press ENT The measured value will stop blinking indicating the completion of the calibration 4 Supply sample water for measurement Zero calibration is completed The display returns to the calibration mode Tip To return to the measurement mode hold down HOLD or ESC The hold mode is ca...

Page 71: ...Wait a few minutes for stable reading 4 When the measured value becomes stable press ENT 5 The latest measured value is displayed on the main display The reference value will start blinking on the sub display Use arrow keys to adjust the reference value to the value measured with a DPD tester Increases the value by 0 01 mg L Decreases the value by 0 01 mg L The input range is between 0 01 mg L and...

Page 72: ...lect the Zero calibration screen 2 Use the arrow key to select t on the sub display and then press ENT The temperature calibration mode will become active and the sub display will start blinking 3 Use arrow keys to adjust the value displayed on the main display to the reference water temperature Increases the value by 0 1 C Decreases the value by 0 1 C The setting range is between 5 0 C and 5 0 C ...

Page 73: ...ck Insulation of the terminal Remove condensation or dirt from the terminal block An abnormal value is displayed Dirts on the sensor Clean the sensor For the cleaning procedure refer to Maintenance of sensor page 48 Unexpected short circuit or open circuit in the sensor cable Check the sensor cable Loosened terminal connection Check the terminal block The flow rate of the sample is outside the spe...

Page 74: ...inlet Power supply error The power supply voltage falls outside the rated voltage range Check the power supply voltage Something wrong with wiring blown fuse Check the power wiring Internal trouble Contact us Symptom Possible cause Remedial action Symptom Possible cause Remedial action Blinking display out of the measurable range The concentration is high Check residual chlorine concentration with...

Page 75: ...alibration E 22 4 Temperature sensor short circuit error The lead wire from the temperature sensor is short circuited E 25 7 Temperature measurable range error The measured temperature value is under 5 C or over 55 C E 27 9 Temperature calibration error The measured temperature value is under 5 C or over 55 C During calibration E 61 5 Flow rate error Low flow rate is checked by a flow switch Durin...

Page 76: ...re sensor is short circuited The resistance value of the temperature sensor is about 0 8 k or less equivalent to 50 C The resistance between T and T on the sensor is abnormal If the resistance is less than 0 8 k the sensor is faulty Replace the electrode There is a mistake in wiring the sensor cable and the relay cable Measure the resistance between T and T Closed circuit is not expected E 25 The ...

Page 77: ...turn it ON again If the system error appears again after the HR 200 is restarted contact us E 91 System error A D converter malfunction E 92 System error The stored data such as settings and calibration values is volatilized Error code Triggering condition Reset condition Possible cause Remedial action h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 78: ...900 max Linearity Within 0 08 mA output only Repeatability Within 0 02 mA output only Output range Output 1 Residual chlorine concentration Free setting within measuring range Output 2 Temperature Free setting between 10 C and 110 C Error output Hold or burnout to either 3 8 mA or 21 mA Transmission hold Transmission signal is held at the latest value or preset value Contact output Number of outpu...

Page 79: ...onds Hold time 1 minute to 30 minutes Timer accuracy Within 2 minutes per month Calibration Calibration method Zero calibration zero liquid calibration Span calibration comparing to the value with DPD method with automatic electrical zero calibration Additional function Automatic detection of calibration failure zero error Calibration record elapsed days from the last calibration Self diagnosis Ca...

Page 80: ...um alloy coated with epoxy denatured melamine resin Material of fittings SUS304 Material of hood SUS304 coated with epoxy denatured melamine resin Material of window Polycarbonate Display element Reflective monochrome LCD External dimensions 180 W 155 H 115 D mm fittings are excluded Mass Main body Approx 3 5 kg Hood and fittings Approx 1 kg The surge test specified in the EMC Directives for CE Ma...

Page 81: ... method including electric zero calibration Wetted materials PVC PPO FKM EPDM Electrode material Au AgCl C Bead material SiO2 or ceramic Filter material Nylon Pipe connection Sample inlet PREFAB JOINT TS16A ASHAHI Sample outlet PREFAB JOINT TS16A ASHAHI 6 Cleaning method Mechanical polishing with bead electrochemical cleaning 7 Cable length Standard 2 m max extension 40 m Operating temperature ran...

Page 82: ...s beads the life time of the electrode will be shortened Choose suitable beads taking the necessity of cleaning and life time into consideration Product name Cathode electrode for RA 10 20 Model RA K Material of electrode Au Material of wetted part PPO EPDM Operating temperature 0 C to 45 C Mass Approx 1 8 g Product name Filter unit for residual chlorine meter Model RA F Wetted materials PVC EPDM ...

Page 83: ...l chlorine meter model RA 20 Model RA FS20 Setup flow 0 5 L min contact open due to decreased flow Wetted materials PVC EPDM PPO Operating temperature 0 C to 50 C without freeze Pressure 0 MPa to 0 5 MPa Direction Horizontal Switch case must be kept upward Pipe connection Sample inlet PREFAB JOINT TS16A Sample outlet PREFAB JOINT TS16A Mass Approx 0 17 kg Product name Pressure regulator for RA 20 ...

Page 84: ...2 to 0 75 MPa N 0 02 to 0 15 MPa pH 5 8 to 8 6 pH 1 0 pH or more Electric conductivity 10 mS m or more Filter unit Y A filter is integratde 100 m Wetted materials AS PP NBR PVC EPDM N Sample should be filtered Flow switch Y Flow rate setting RA 10 1 2 L min RA 20 0 5 L min Wetted materials PVC EPDM PPO N Flowmeter Y Flow rate setting 0 2 to 2 0 L min RA 20 only Wetted materials PVC PMMA PTFE FEP F...

Page 85: ...ature of water On the acid side the majority is present as hypochlorous acid Fig 1 shows the percentage of hypochlorous acid hypochlorous ions against pH changes The disinfecting power changes with pH i e it is higher on the acid side and lower on the alkaline side because the disinfecting power of HClO is higher than that of ClO The high oxidizing power of hypochlorous acid ions breaks the cell m...

Page 86: ...educes these problems by keeping potential between sample and cathode constant The electro chemical reactions on the cathode and anode electrode with a polarographic circuit are expressed as follows Acting electrode Cl2 2e 2Cl Opposite electrode Ag Cl AgCl e On the surface of the cathode electrode residual chlorine is reduced to be chloride ion by the electron given from the cathode electrode The ...

Page 87: ...tion contact our sales personnel Effect of electrical conductivity of sample Electro chemical reaction is needed to measure residual chlorine for the HR 200 The sensitivity is affected by the conductivity less than a specified level Fig 4 Add electrolyte for example sodium chloride to keep the conductivity more than 100 S cm for low conductive sample It is rare to treat sample with electrolyte bec...

Page 88: ...Changes in the reading depending on the flow rate of the sample for the RA 20 Note Correct reading is achieved on the assumption of the constant and proper flow rate Effect of sample temperature In the polarographic method used by the HR 200 the signal from the sensor is affected by the temperature of the sample There are two main reasons of the temperature dependency 1 The thickness of the diffus...

Page 89: ...ed by receiving two electrons and then iron will be plated on the cathode surface equation 3 Fe2 2e Fe Equation 3 When metal is plated on the surface of the cathode electrode the measured value is affected The electrochemical cleaning is performed to remove metal adhering to the surface of the cathode electrode In the electro chemical cleaning procedure plated metals on the cathode surface is oxid...

Page 90: ...cement frequency recommended Part No RA B Consumables kit Cleaning beads glass 5 pieces 3 months 3200285395 Abrasive paper 1 piece Mesh filter 5 pieces 3 months Filter stopper 1 piece O ring S50 S30 P14 P11 1 piece 1 year RA BC Consumables kit Cleaning beads ceramic 5 pieces 3 months 3200507271 Abrasive paper 1 piece Mesh filter 5 pieces 3 months Filter stopper 1 piece O ring S50 S30 P14 P11 1 pie...

Page 91: ...7 PCB unit PCB 9 Screw cap Q 38 Sealing pin PVC 10 Screw SUS304 39 Cable gland 66 Nylon EPDM 11 Spring cap SUS304 40 Plug SUS304 12 Compression spring 8D 15L SUS304WPB 41 Bottom case ADC12 13 Top case ADC12 42 Roof SUS304 14 Window plate packing Q 43 Ball bracket SUS304 15 Indication panel PET 44 U bolt SUS304 3 2 1 6 5 4 7 10 9 8 12 11 14 13 15 18 17 16 20 19 27 26 25 30 29 28 31 32 34 33 35 38 3...

Page 92: ...board 35 is exposed in the assembled state 8 Remove two flat cables connected to the connectors 16 LCD Glass 45 Spacer C3604BD 17 LCD packing Q 46 PCB H4W ANL 0x PCB 18 LCD holder ADC12 47 PTFE plate PTFE 19 Case packing Q 48 Protective sheet U PVC 20 Plunger packing R Q 49 Upper hinge ADC12 21 Parallel pin SUS304 50 Screw cap 2 Q 22 Terminal ID plate RC PET 51 Functional ground information plate ...

Page 93: ...PPO FKM 9 C 7E cable standard 2 m 27 EC electrode RA EC C PPO FKM 10 Cell nozzle PVC 28 Anode electrode RA A Ag PPO FKM 11 Filter supporter PVC 29 Maintenance information plate PET 12 Overflow cell PVC 30 High sticker 13 Note plate PET 31 Desiccant 14 Knurled heads screw PVC 32 Cell bracket SUS304 15 Additional cap hole PVC 33 Pole bracket SUS304 16 Overflow lid 2 PVC 34 U bolt SUS304 17 Sensor po...

Page 94: ...EC electrode RA EC C PPO FKM 8 C 7E cable standard 2 m 24 Anode electrode RA A Ag PPO FKM 9 O ring P11 FKM 25 Maintenance information plate PET 10 Cell nozzle PVC 26 High sticker 11 Filter supporter PVC 27 Desiccant 12 Inline cell PVC 28 Cell bracket SUS304 13 Sensor port R SUS304 29 Pole bracket SUS304 14 O ring S14 FKM 30 U bolt SUS304 15 O ring S80 EPDM 31 Mesh filter PP 16 Rating plate B1 PET ...

Page 95: ...Data 83 Quick reference appendix Quick reference is a digest of the instruction manual h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 96: ...ct Turns ON when system error E 90 E 91 or E 92 occurs Main display Displays a measured value Sub display Displays a set value or error code Cal mode CAL Hold mode HOLD Indicator lamps Span calibration Hold down CAL until the CAL lamp lights up When the electrical zero signal is judged to be sta ble electrical zero calibra tion is completed and will disappear It is ready for span calibra tion when...

Page 97: ...tial setting 1 00 mg L Calibration data check screen No calibration data With calibration data Zero value check screen Screen for displaying the number of days elapsed since the last calibration Relay 1 and relay 2 are same procedure Moving average count check screen damping factor Initial setting 10 times Contact output type setting 1 type Initial value non CLn Cleaning check screen Wait time bef...

Page 98: ...d on the main display and measured stops During various settings in the hold mode pressing this key will go back to the previous item The change that has been previously made to any setting is canceled Basic setup menu describes the general settings Refer to the instruction manual other than those listed Following the operation procedure 4 Temperature display setting for sub display Setting range ...

Page 99: ...e yES no Initial setting no Specifies a cleaning frequency Setting range 1 2 4 6 8 12 h 1 to 7 days Initial setting 7 days Specifies HOLD output time after the end of cleaning Setting range 1 to 30 min Initial setting 15 min RS 485 address setting Setting range 0 to 99 Initial setting 0 Setting self checked sensor error for FAIL Setting range yES no Initial setting no Setting no flow error for FAI...

Page 100: ...heck output of 3 8 mA 3 8 mA is output to transmission output 1 and 2 Screen to check output of 4 mA 4 mA is output to transmission output 1 and 2 Screen to check output of 12 mA 12 mA is output to transmission output 1 and 2 User check menu Screen to check output of 20 mA 20 mA is output to transmission output 1 and 2 Calibration menu Determined in ENT Calibration by zero solution The zero point ...

Page 101: ...ensor disconnection error The lead wire from the temperature sensor is opened During measurement or calibration E 22 4 Temperature sensor short circuit error The lead wire from the temperature sensor is short circuited E 25 7 Temperature measurable range error The measured temperature value is under 5 C or over 55 C E 27 9 Temperature calibration error The measured temperature value is under 5 C o...

Page 102: ...h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

Page 103: ...iba adt jp Headquarters 31 Miyanonishi cho Kisshoin Minami ku Kyoto 601 8306 Japan TEL 81 75 321 7184 FAX 81 75 321 7291 H O R I B A A d v a n c e d 丁 e c h n o h19136 UTC 2020 03 30 3 34 51 C O N F I D E N T I A L ...

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