USER MANUAL - YeoKal Electronics
Contents
1. 47 Introduction The YK615 comes already assembled The only construction required is to connect the probe assembly to the Reader Unit and if necessary connect the external power supply General Description The YK615 Water Quality Analyser is a robust multi parameter field instrument which can be used for real time water quality measurements or for remote operation using a built in data logger The instrument consists of a multi sensor probe and a Reader Unit which can both store and display data and also has extra auxiliary analog probe inputs The probe and Reader Unit have been designed to be compact lightweight and easy to use Data is transferred to the Reader Unit using serial communications giving reliable interference free measurements The Reader Unit controls the operation of the instrument provides easy access to the data control memory and calibration functions The Reader Unit contains a real time clock and all stored data includes the date and time of measurement Both stored data and calibration information can be easily down loaded to a computer using the YEO KAL data transfer programs The YK615 comes with storage container to protect the sensors while the instrument is in storage An optional auxiliary battery lead is available for connecting the YK615 to an external power supply during extended periods of remote logging Specifications Reader Unit2. 23 CHEGK BATTERY a eMe das pads esae UU Apa ph Su 24 DATA PORT OFE ONIS dicta DE 24 SENSOR SERIAL NUMBER D sis t dtes PI AE 25 SETUP MENU ZS eque queo a BRE TERN TORRES RUE es RUE Le Rec 26 611 SETUP 2 tdt ohh retour imt av Quedan duh anes dede UE 26 ASSIGN DEESENSORS3 texas vena tivo sido t inan aun 26 CONFIGURE DISPLAY 4 costi hd lire d dr EDI E Louis 26 SETF PREGISI N 27 DATE FORMAT S a 27 INSTRUMENT TIMEOUT 7 a et ld 27 SET RICE IN 8 OW edid ab 27 28 BEEPER 1O T TT 28 TURBIDITY AVERAGE TET ss eo eda DR A te 28 EIC EY D 28 CALIBRATION M TEMPERATURE CALIBRATION 31 HIGH CONDUCTIVITY SALINITY CALIBRATION 31 LOW CONDUCTIVITY CALIBRATION e Un 32 DISSOLVED OXYGEN CALIBRATION pube gi e viet 32 GS
3. Deal te 33 ORP CAUIBRATION S d emet aet er o bate tte ORT 33 T RBIDITY CALIBRATION Lyman 34 DEPTH CALIBRATION 2 d rapto n td 34 BLUETOOTH LL m d TE 36 Palt Inge i enses Suis 36 GPS 36 ESTABLISHING BLUETOOTH AND GPS 36 MAINTENANCE eos is Feet goa de ee uva een PENIS ae usus Oe ag ses a READER UNIT MAINTENANCE dame 38 38 BATTERY REPLACEMENT oco tate asha 39 D O SENSOR MAINTENANCE a EP epe epe ned eate dee 39 Changing the Membrane ouo e RUE a a dunt 39 Dissolved Oxygen Stirrer Maintenance 40 e bett as 40 TURBIDITY SENSOR MAINTENANCE 41 CONDUCTIVITY SENSOR MAINTENANCE asas 42 5 SSO SS SSS n s 44 APPENDIX 1 CONVERSIONS USED 45 APPENDIX 2 46 APPENDIX 3 PART NUMBERS
4. The probe assembly consists of sensor cable and connectors The body of the probe is made of PVC with a PVC sensor guard The interface cable is permanently connected to the probe body to eliminate the need for underwater connectors In the event of the cable being cut the probe has a waterproof seal between the cable connection and the internal electronics package At the other end of the cable is a corrosion and water resistant connector for connection to the Reader Unit The sensors can easily be accessed by sliding the sensor guard up and rotating the bottom section of the probe see fig 2b The conductivity and dissolved oxygen sensors can be removed for servicing However the whole unit must be thoroughly dry before these sensors are removed A cotton bud can be used to dry the spaces in between the sensors probe 4 body lift sensor cage rotate probe ba amp probe bose Y conductivity sensor pull down to remove dissolved oxygen sensor pull down to remove to access sensors se temperature sensor stirrer support post stirrer Figure 2 a Complete probe assembly b Sensor cluster exposed by lifting sensor cage and rotating probe base C Expanded view of sensor cluster with dissolved oxygen sensor detached 10 Temperature Sensor The temperature sensor consists of a pt 100 platinum element
5. Circuit board Communications cable Auxiliary 12V supply cable Auxiliary 12V Bulk head connector Communications bulk head connector Sensor bulk head connector YEO KALGraph graphics software
6. S G sg TDS g l D 0 sat D O ORP mv No Date 1 8 2 8 3 8 4 8 5 8 05 05 05 05 05 23 1 25 5217 28 230 Temp 00 2 00 2 00 2 00 2 00 2 M Temp 00 2 00 2 00 2 00 2 00 2 26 t 28 997 997 997 997 997 9979 0 0 9979 0 0 9979 0 0 TERI 0 0 29979 0 0 39 9 51 0 59 2 63 9 67 0 mg 1 3 54 6 8 5 42 6 8 5 89 6 8 6 13 6 8 6 19 6 8 mg 1 pH 3 54 6 8 4 53 6 8 5 25 6 8 5 67 6 8 5 95 6 8 289 310 317 319 320 44 60 64 77 TFs 43 48 52 51 60 22 Figure 4 Sample of Excel_UD data output from YK615 date format dd mm yy In order to down load the data stored in memory to a computer you will need terminal software ie YK Quick Terminal or similar and the purpose built communications cable To transfer data perform the following operations 1 Connect the 3 pin connector of the communications cable to the COMMS connector of the Reader Unit see figure 1 Connect the other end of the cable to an RS232 serial communications port on your computer or adapter Start your data transfer program and prepare it for receiving data Switch on the YK615 and select 3 STORE DAT OUT to down load data from the store memory or select 6 LOGGD DAT OUT to down load data from the logger memory then press
7. 8 0 9979 0 0 3979 3 54 6 8 292 44 0 8 11 05 16 32 45 0 00 21425 0 0 00 0 00 997 8 0 9979 0 0 61 1 5 42 6 8 320 60 8 8 11 05 16 32 48 0 00 21 26 0 0 00 0 00 997 8 0 9979 0 0 66 3 5 89 6 8 322 64 2 8 11 05 16 32 50 0 00 21527 0 0 00 0 00 997 8 0 9979 0 0 69 1 6 13 6 8 322 77 7 8 11 05 16 32 52 0 00 21 27 0 0 00 0 00 997 8 0 9979 0 0 69 8 6 19 6 8 321 27 57 Data tag 2 DEF Date Time Depth M Temp C uscm E C Sal ppt Dens g cm3 S G sg TDS 9 1 D O sat D O mg 1 pH pH ORP mv Turb ntu 8 11 05 16233123 0 00 21 25 0 0 00 0 00 997 8 0 9979 0 0 39 9 3 54 6 8 289 43 9 8 11 05 16 33 25 0 00 21 26 0 0 00 0 00 997 8 0 9979 0 0 51 0 4 53 6 8 310 48 7 8 11 05 16 33 27 0 00 21 27 0 0 00 0 00 997 8 0 9979 0 0 59 2 5 25 6 8 317 52 3 8 11 08 16 33 28 0 00 21 27 0 0 00 0 00 997 8 0 9979 0 0 63 9 5 67 6 8 319 57 3 8 11 08 16 33 30 0 00 21 28 0 0 00 0 00 997 8 0 9979 0 0 67 0 5 95 6 8 320 60 7 Figure 4b Sample of data output from the YK615 date format dd mm yy 19 20 Data tag 1 ABC No Date Time Depth M Temp C E C uscm E C mscm Sal ppt Dens g cm3 S G sg TDS g l D O sat D O mg 1 pH pH ORP mv Turb ntu Data tag 4 2 DEF No Date Time Depth M 18 11 05 16 32 41 0 00 21423 997 8 0 9979 39 9 292 144 0 18 11 05 1653323 0 00 18 11 05 16 32 45 0 00 21 25 0
8. Active silver and lead electrode sensor with PTFE membrane and built in stirrer 0 600 ntu 0 5 ntu 0 300 ntu range 5 ntu 300 600 ntu range 0 3 ntu Nephelometric measurement from a 90 sensor with pulsed infra red light source pH Range 0 14 Accuracy 0 03 Resolution 0 01 Type Combination silver silver chloride type with sintered Teflon junction ORP Range 700 mV to 1100 mV Accuracy 3 mV Resolution 1mV Type Combination bare metal electrode common reference junction with pH electrode see Appendix 1 Conversions Used Depth optional Range 0 100 m or 0 150m Accuracy 0 5 of full scale Resolution 0 1m Type Dual active silicone strain gauge Two auxiliary inputs Input 0 5 volts each input Physical Cable length 3m or 10 m Other lengths made to order Dimensions 50 mm diameter 320 mm long Description of Reader Unit The Reader Unit is housed in a tough durable high impact polycarbonate case with a keypad and alpha numeric display mounted on the front panel The side of the case has five connectors The top connector is used for data output the second for connecting an external power supply and the third is the sensor connector The two remaining connectors are used for auxiliary analog probe inputs and a GPS input Each connector is provided with a protective cap which screws over the connector ensuring full waterproof sealing The connectors also have a polarising pin
9. follows 1 Loosen the two retaining screws in the stirrer support posts refer to figure 3 do not remove them 2 Remove the stainless steel pin on which the paddle is held by pushing it from one end Be very careful to not lose the spacers which are between the paddle and support posts 3 Clean the paddle and replace it in the reverse order Do not over tighten the retaining screws or you will strip the thread in the support post pH ORP Sensor Maintenance PH ORP Sensors The pH and oxidation reduction potential ORP are measured using separate pH sensor and bare metal platinum electrode for ORP They both share an internal reference electrode in the pH sensor pH Standard non fill able These pH sensors require the least maintenance only to be stored clean 3 MOL KCL Their design is a double junction type to protect the primary junction from dilution and contamination pH Optional refillable These optional pH sensors have a pH Meter refillable secondary junction for sensor maintenance As the Primary Reference electrolyte has a higher flow it requires regular electrolyte top up and calibration This type of sensor is faster in responding 5 Porous Wick and helps combat accumulation of internal contamination Primary Reference Internal Filling Solution Sleeve Electrolyte renewable Ground Surface Intermediate Junction secondary reference electrolyte It is important to
10. housed in a stainless steel sheath for robustness and corrosion resistance The temperature sensor requires little maintenance however the temperature measurement is used for calculating the dissolved oxygen in mg l and for temperature correction of the conductivity sensor so it is important that the temperature sensor is properly calibrated dissolved oxygen Figure 3 End view of probe without bottom section showing position of sensors 11 Dissolved Oxygen Sensor Dissolved Oxygen is measured using an active type membrane covered sensor The sensor itself consists of silver and lead electrodes and a 25um PTFE membrane and is filled with a 1 0M potassium hydroxide A constant flow of water passes the sensor maintained by a stirrer located on the bottom section of the probe When the silver and lead electrodes are connected through the external circuit electrons pass from the lead electrode to the silver electrode When oxygen is present at the surface of the silver electrode it reacts with electrons to produce hydroxyl ions At the lead electrode the loss of electrons produces lead ions The lead s electrons combine with hydroxyl to precipitate lead hydroxide on the lead electrode The rate of transference of electrons via the external circuit from the lead to silver electrode ie that is the current flowing in the external circuit is the measure of the rate of cell reaction and thus the rate at which oxygen reaches the silver el
11. reduction potential ORP are measured using pH Meter separate pH sensor and bare metal platinum electrode for ORP Primary Reference They both share an internal reference electrode in the pH sensor Electrolyte This sensors has a refillable secondary junction for sensor Ag AgCl Elements maintenance This sensor with maintenance helps combat Porous Wick Primary Reference accumulation of internal contamination Internal Filling Solution Sleeve Electrolyte renewable Ground Surface Intermediate Junction secondary reference electrolyte pH Membrane Sample 12 Assembly The YK615 comes already assembled The only construction required is to connect the probe assembly to the Reader Unit and if necessary connecting the external power supply Connecting the Probe Assembly To attach the probe assembly first unscrew the knurled connector cap from the SENSOR connector of the Reader Unit The connector cap is attached to the Reader Unit by a chain so that it can be replaced whenever the probe assembly is disconnected To connect the probe assembly align the locating pin on the Reader Unit with the slot on the cable connector and push the cable connector into the Reader Unit sensor connector then screw home the retaining ring Connecting an External Power Supply Extended remote logging and charging the internal Reader Unit batteries can be achieved by connecting the unit to an external power dc power
12. sensor membrane before the calibration can be performed You should 32 also check that the stirrer is operating correctly The paddle should oscillate freely when the instrument is performing measurements Select DISSOLVED OXYGEN by pressing the calibration key use the arrow keys and select calibrate Inst Press ENTER and use ARROW keys to select D O Press ENTER and use arrow keys to select high or low set points Press ESC to exit without changing the instruments calibration If you wish to continue immerse the probe in the 0 oxygen solution a visual display of the raw data for zero can be seen on LCD display When the data is stable press ENTER the dissolved oxygen calibration coefficients will then be automatically updated You will be asked if you wish to calibrate high set point ENTER or ESC Select Cal high set point and press ENTER Immerse the probe in the aerated solution a visual display of the raw data is seen on the LCD display When the data is stable press ENTER the dissolved oxygen calibration coefficients will then be automatically updated and the instrument will return to the calibration menu pH Calibration The pH sensor is calibrated using buffer solutions with a pH of 3 9 0 and 6 12 If the probe is fitted with a refillable ph sensor it is good practice to refill prior to calibration see pH ORP Sensor Maintenance To calibrate the pH sensor proceed as follows 1 Select pH from the calibration key t
13. 00 997 8 0 9979 61 1 320 160 8 18 11 05 16 33 25 0 00 18 11 05 16 32 48 0 00 21 26 997 8 0 9979 66 3 322 164 2 18 11 05 16 33 27 0 00 18 11 05 16 32 50 0 00 21 27 0 00 997 8 0 9979 69 1 322 TT 18 11 05 16 33 28 0 00 18 11 05 16 32 52 0 00 21 21 997 8 0 9979 69 8 321 177 7 18 11 05 16 33 30 0 00 Temp C 21 25 0 E C 0 00 Sal ppt 0 00 Dens g cm3 997 8 S G sg 0 9979 TDS g l 0 0 0 0 sat 399 D O mg 1 3 54 pH pH 6 81 ORP mv 289 21 26 997 8 0 9979 51 0 310 21 27 997 8 0 9979 5952 317 21 27 997 8 0 9979 63 9 319 21 28 997 8 0 9979 67 0 320 Figure 4a Sample of Excel LR data output from the YK615 date format dd mm yy 21 Data tag 1 ABC E C uscm E mscm Sal ppt Dens g cm3 S G sg TDS g l D 0 sat D O ORP mv No Date 1 8 2 8 3 8 4 8 5 8 05 05 05 05 05 41 45 48 50 52 23 25 26 2241 CEN 997 997 997 997 997 9979 0 0 9979 0 0 39979 0 0 9979 0 0 9979 0 0 2 9 61 1 66 3 69 1 69 8 292 320 322 322 324 Data tag 2 DEF E C uscm E C mscm Sal ppt Dens g cm3
14. Display LCD with four lines of 16 alphanumeric characters Memory Remote logging 2425samples Real time STORE key 840samples All samples include date time plus optional GPS if assigned Memory is backed up by lithium battery to guard against main battery failure Headers 75 for STORE key data 25 for logged data Note each header is 18 characters long Sample Rate 1 per 2 minutes to 1 day in Standard Logging Mode 1 per second in Fast Logging Mode Display updates every 2 seconds Communications Baud rate 9600 8 data bits O parity 2 stop bits Power Battery pack containing 8 C size cells connected as a pack Memory backup voltage supplied by gt lithium cell Case Impact resistance polycarbonate waterproof display keypad connectors and case Dimensions 130 mm X 95 mm X 190 mm Weight 1 6 kg Sensors Temperature Range Accuracy Resolution Type Conductivity High Range Accuracy Resolution Low Range Accuracy Resolution Type Salinity Range Accuracy Resolution Type Dissolved Oxygen Range Accuracy Resolution Type Turbidity Range Accuracy Resolution Type 2 509 0 05 C 0 01 C pt 100 platinum element 0 80 ms cm 0 05 ms cm 0 02 ms cm 0 8000 us cm 5 us cm 3 us cm Four electrode cell 0 60 ppt 0 05 ppt 0 02 ppt See Appendix 1 Conversions Used 0 20096 saturation 0 20 mg l X 0 596 0 196
15. ENTER The unit will then display the message DOWNLOADING DATA and down load data to your computer When the operation is finished the instrument will automatically return to the main menu Start Logger 5 The YK615 can also be programmed to take measurements at regular intervals and store the results in the logger memory The fastest sample rate in Standard Logging Mode is one per two minutes the stirrer is activated one minute before the sample is to be taken and will switch off immediately after the data has been recorded In Fast Logging Mode the sample rate is approximately 1 per second Programming the Reader Unit To program the logger for a measurement routine perform the following steps 1 Enter the main menu select 5 START LOGGER and press ENTER If the logger memory is empty the operator will go to the set up routine if there is data in memory the operator will be asked to press ENTER to clear memory or ESC to log data contiguously from the last data point Auto logging Press ENTER to program logging the start date will be displayed To change the start date use the arrow keys and ENTER to accept the required flashing start date Note the time is displayed in 24 hour time format The cursor will automatically go from day DD to month MM and year YYYY then start time HH MM press ENTER to go to stop time settings This is set up the same way 2 Whenthe desired sample rate is displayed press ENTER The message Ente
16. Storage When storing the instrument the pH electrode should be kept moist in a solution of 3M KCI approximately 22 grams of dissolved in water to make 100 ml of solution It is advisable to buffer this solution to bring it to approximately pH 5 or 6 This solution may be contained in either the small pH sensor cap If the YK615 pH sensor has a small cap around it this simply pushes into place The solution can be put into this cap for storage of the pH sensor If this method is used a drop of clean water should be put into the storage container to keep air around the DO sensor damp CARE SHOULD BE TAKEN when removing or replacing this cap DO NOT UNSCREW THE CAP SLIDE THE CAP OFF The glass sensor is EXTREMELY DELICATE and should not be bumped or touched e YK615 comes with a storage canister which clamps onto the probe providing a waterproof seal To maintain enough moisture add 2 mls of water to keep the pH sensor from drying out 44 Appendix 1 Conversions Used The YK615 measures dissolved oxygen as saturation and then automatically converts the reading to milligrams per litre This conversion is calculated from the dissolved oxygen solubility tables found in International Oceanographic Tables vol 2 National Institute of Oceanography 1972 The conversion between conductivity and salinity is performed using the Practical Salinity Scale UNESCO Technical Papers in Marine Science 1983 The conversion of low c
17. Yeo Kal Electronics Pty Ltd 18 26 Wattle Road Brookvale NSW Australia Telephone 61 2 9939 2616 Fax 61 2 9905 1100 USER MANUAL Model 615 Water Quality Analyser For firmware V1 23 Version 3 3 Date 4 9 2015 Information in this document is the copyright of YEO KAL Electronics Pty Ltd and is subject to change without notice No part of this document may be copied or reproduced by any means without the express written permission of YEO KAL Electronics Pty Ltd All trademarks are the property of their respective companies 2012 Yeo Kal Electronics Pty Ltd Contents INTRODUCTION u au I M GENERAL DESCRIPTION ua aQ E 5 SPECIFICATIONS unu aaa Patr aaa 5 stan etta 5 6 TempergtHt essersi ped ve SE URINE 6 Conductivity 6 yuyana eee ee rer cee Aga 6 Dissolved OxV eel b Mor Uer e 6 y Sit aes 6 T 7 RP Na aysa LATE 7 Depth m aa sa Su pea Edel rui 7 Two auxiliary Inputs Suni e
18. all sensor calibrations 1 Outcal constants This function allows the operator to down load the current 615 calibration constants data to a PC and saved for further analysis A serial cable need s to be connected to the PC serial port and the other end of the cable plugs into the serial bulk head connector on the 615 2 In constants As mentioned in 1 The calibration constants can be up loaded back into the 615 If the instrument has been calibrated incorrectly the saved data files may be edited and up loaded back into the 615 and the already stored data can be corrected while down loading it into a PC 3 Calibrate Inst Select cal inst and press ENTER If there is any data in the Reader Unit memory the message CLEAR ALL MEM will appear on the display Press ENTER to clear memory or ESC to return to the main menu Once you have entered the calibration menu use the arrow keys to scroll through the menu and select the sensor which you wish to calibrate by pressing ENTER 29 If the user mistakenly places the probe into the incorrect solution ie high standard instead of a low standard the message will appear on the LCD display CALIBRATION ERROR RECAL HIGH amp LOW To remove the message recalibrate the sensor correctly Note This does not ensure that the unit is calibrated accurately but does ensure that a major mistake or error does not occur During calibration the display shows a D number D These are the raw numbers
19. ary and the connectors are kept clean and dry When the voltage from the battery pack falls below 9 8 volts the Reader Unit will display the message BATTERY low on the LCD display If the unit is not recharged the voltage will still drop and the instrument will then automatically shut down although any data stored in the memory will be retained When this occurs the only way to restart the instrument is to recharge the batteries Ensure that the connector caps are secured onto any connectors which are not in use Reset If the reader unit behaves erratically e Reader Unit will not switch ON or OFF LCD display will not display all the characters e Press keys will not operate reliably e Down loaded data out of sequence It is necessary to reset the reader unit PCB for the above behaviour If the unit will not switch off by pressing the ON OFF key the front panel should be unscrewed and the battery lead to the main PCB will need to be disconnected and then re connected Once the reader is switched off use the following procedure The RESET function is initiated by keeping the ESC key depressed while pressing the ON OFF key The message on the LCD display will ask you if you wish to continue or escape Press the ENTER key for yes It will then ask you want to set YK Ser Probe Yes Enter No ESC After pressing Enter it will ask if the unit is fitted with a depth sensor If there is no depth sensor fitted on the probe press the ESC key
20. as well as after any maintenance has been performed on the probe The frequency at which calibration is required will depend on the specific application for which the instrument is to be used The optimum time between calibrations can be established by regularly checking the performance of the instrument in standard solutions If the YK615 is kept well maintained and calibrated on a regular basis a single point calibration is sufficient to keep the instrument performing to specification However two point calibrations whenever a sensor has had any maintenance The calibration procedures require that the probe be immersed in standard solutions The probe storage container which is supplied with the YK615 is ideal for this purpose as it provides a water tight seal on the probe and minimizes the volume of standard solution required about 150 ml Make sure that you rinse both the probe and container before each calibration and between each calibration solution The standard solutions are available from YEO KAL Electronics Pty Ltd or most major scientific suppliers Both dissolved oxygen and conductivity measurements require a correction for temperature this correction is automatically made by the instrument hence the temperature sensor must be correctly calibrated before you can calibrate either the dissolved oxygen or salinity conductivity sensors To enter the calibration menu press the CAL key Three choices will appear on the LCD display for
21. ast cipe oci tes 7 dij e UE 7 DESCRIPTION OF READER UNIT u aaa oisi uD Aa a Uso 8 Connector asso pe EE EUR HN ERU a sasa 8 DESCRIPTION OF PROBE senate deo ee deb prb epu et ee tee ce 10 Temperature Senso ie E aee dte e e Ve d E e A dE 11 Dissolved Oxygen Sensor GI RISE 12 Cond ctivity SENSO u rest bv rnm eeu 12 T rbidity Ne a 12 E vetu ved vasta ved 12 ASSEMBLY c m 13 CONNECTING THE PROBE ASSEMBLY 2 er arre e Re ER exeat ran 13 CONNECTING AN EXTERNAL POWER 13 2 14 OPERATING INSTRUCTIONS Re 14 KEY PAD DESCRIPTION aeons 14 The menu options are as follows 15 ADJUST CONTRAST 1 16 ALTITUDE AND SALINITY CORRECTIONS 2 16 USING THE READER UNIT MEMORY 16 Store Data Out 16 Erase Store data 17 LOGGED DATA OUT 6 ER 17 STARTSUOGGER IB 23 PROGRAMMING THE READER UNIT
22. ct then go through the same procedure for Month Year and Time 611 Setup 2 Ifthe 615 is supplied with a Model 611 probe assembly all that is necessary to configure the system to operate as a model 611 is to go to 611 Set up and press ENTER and enter again if the probe is fitted with a depth sensor or ESC if no depth sensor is fitted Assign Del Sensors 3 When a channels is assigned the user may change its default parameter name to whatever best describes the parameter being measured The default parameter name is an indicator of the channel name Eg Aux1 Aux2 etc This function allows the operator to identify which channel has been assigned to the parameter name which has been set to the operator s specification The user specified parameter name for any channel may be reset to the default parameter name by pressing the ENTER key When assigning a GPS use the arrow keys to find Assn GPS and press ENTER Follow instructions on the LCD display and press ENTER The next step is to go to Configure Display 4 Configure Display 4 The display may be set up to the operator s preferences ie each parameter may be displayed on the LCD in the order of the operator s preference There are four pages or screens consisting of four lines of selected parameters The selected parameter may be placed on the desired page and line If the unit has been initialised to function with a 611 probe attached and the operator needs to add e
23. e A prolonged period of no maintenance will affect the reference and may cause the centre offset to drift meaning mid values may read high or low Storing Do not store pH sensor in water as it will deplete the ions Do not let the pH sensor dry up Always rinse of contaminates and store clean Ensure there is some pH probe keeper in the protector cap before replacing on the ph sensor Turbidity Sensor Maintenance The turbidity sensor requires little maintenance except ensuring that the glass tube is kept clean Do not use an abrasive cleaner Clean the tube with a soft rag and if required detergent Make sure that you rinse the probe so that there is no residual detergent film to interfere with the sensor optics Make sure that you recalibrate turbidity after cleaning the sensor The model 615 comes with a black acetyl screen This is inserted into the glass tube to reduce stray infra red from causing errors in clear water At the end of the tube are two holes slots apertures that allow the infra red light source to pass which is then detected at 90 deg to the source Mud 41 and residue can accumulate and the holes slots may become blocked and obscure the light source affecting the value They can be cleaned by either using a small bottle brush or remove the screen to clean it Remove the screen by unscrewing two retaining screws at the bottom of the probe situated on the flange Pull the tube out and wash it and also clean the
24. ectrode The current flowing in the external circuit is directly related to the oxygen concentration in the sample being measured by the electrodes The Dissolved Oxygen sensor may periodically require a new membrane and electrolyte A unique knurled nut is used to hold the sensor membrane in position without overstressing the membrane This gives long term stability and allows easy replacement The sensor can be removed from the probe for servicing A replacement probe is ready for use immediately after installation and calibration Conductivity Sensor The conductivity is measured using a 4 electrode bridge The four electrode system uses automatic compensation to overcome any build up of contamination on the electrodes The electrodes are made from fine platinum and are coated with platinum black to enhance the long term stability and sensitivity of the sensor The coating should last for a long period of time if it is not mechanically removed however the coating can be replaced using the optional platiniser or by returning the sensor to YEO KAL Electronics Pty Ltd Turbidity Sensor The turbidity sensor is located in the hole which runs through the bottom section of the probe and is lined with a glass tube Turbidity is measured by the nephelometric method which uses a light source and a detector measuring the light scattered at 90 degrees to the incident light beam A pulsed infra red light source is used PH ORP Sensor The pH and oxidation
25. essed after X minutes Use arrow keys to adjust the time out from minutes to 120 minutes Press ENTER to accept If the operator does not require this function set the time out to zero minutes Set file in 8 Saved display and sensor parameter format can be saved for later retrieval and allows the current operator to have continuity in display and data format The saved configuration file is accessed using a terminal program and settings Note the terminal program must be set to the following protocol Baud rate 9600 27 Parity None Stop bits 1 Flow Control None Set File Out 9 The display configuration and sensor format can be down loaded from the 615 to a PC for later retrieval by the current operator The configuration file is sent to a PC using a terminal program and the settings are previously mentioned in 9 In Constants Beeper 10 The operator is able turn the audible beeper ON or OFF Use arrow keys to select and press ENTER Turbidity Average 11 Press Enter and the operator will be asked to enter the average The turbidity readings will be averaged over 0 to 99 readings Use the arrow keys to select the required numerals then use aux number keypad to select the actual value Press ENTER to accept Light Key When the light key is pressed it illuminates the LCD display 28 Calibration Calibration order to ensure the accuracy of the YK615 the instrument needs to be calibrated on a regular basis
26. figure 4 below indicating whether the data is from the logger or store memory 17 H YFO KAL MODEL 615 SERIAL NUMBER 317 DATE OF DOWNLOAD 18 11 05 16 33 DATE FORMAT DD MoMo YY HH MM SS Port Param Date Time Ser4 Depth 1 11 05 09 57 Ser0 F C uscm 6 09 04 07 38 Serl Sal ppt 4 09 04 42 Ser2 Temp C 4 09 04 37 Ser3 Turb ntu 4 09 04 97 Ser5 pH 4 09 04 47 Ser6 ORP mv 4 09 04 50 Ser D O sat 4 09 04 12 00 Aux0 Aux chan 0 ot calibrated Auxl Aux chan 1 ot calibrated Aux2 Aux chan 2 ot calibrated Aux3 Aux chan 3 ot calibrated Aux4 Aux chan 4 ot calibrated lo dat 469 17 708 199 1689 239 lo sp 1o temp 0 00 0 0 0 0 00 0 10 00 0 0 0 0 4 00 16 252 0 0 0 0 00 00 00 00 00 81 00 00 547 465 1689 2495 1328 1777 665 577 hi sp hi temp 100 00 1413 35 00 30 00 100 0 10 00 472 100 0 16 16 SI 00 60 81 00 00 78 00 75 1950 521199 4000 249 000 000 000 444 000 111 351 000 37763 LES 5935 780 369 898 986 645 222 936 219 18 Date Time Depth M Temp C uscm E C Sal ppt Dens g cm3 S G sg TDS 9 1 D O sat D O mg l pH pH ORP mv Turb ntu 8 11 05 16 32 41 0 00 21423 0 0 00 0 00 997
27. from the analogue to digital converter prior to conversion to real units such as C temperature or mS cm conductivity or sat dissolved oxygen etc Calibration coefficients are used to convert the D number to the real units 30 Temperature Calibration The temperature calibration should vary very little over the lifetime of the instrument however it is worth checking on the accuracy of your temperature measurements before calibrating the dissolved oxygen or salinity sensors Temperature calibration is performed at two temperatures The low temperature must be between and 20 C and the high temperature must be between 30 and 50C A thermometer to at least 0 1 C accuracy and resolution must be used To calibrate temperature proceed as follows 1 Select TEMPERATURE from the calibration key The message CAL TEMP C will appear press ENTER to calibrate or ESC to main menu The message Cal high set point or cal low set point ENT ESC will appear Press the ARROW keys to make the selection then press ENTER to calibrate the low temperature range 0 20 C press ENTER to proceed Place the probe into stirred water bath After pressing ENTER Raw Data from the temperature sensor will appear wait until the readings are stable and make a note of the reading on the calibration thermometer and press ENTER Press the number arrow keys to change the displayed temperature then press ENTER 2 If you proceed with the high range calibration Select Cal hi
28. gh set point by using the arrow keys The message place probe into 25 50 C water bath Press ENTER the raw data D is displayed Immerse the probe in a stirred water bath held at a constant temperature between 25 and 50 C and wait for the probe to reach a constant temperature Make a note of the temperature on the calibration thermometer and press ENTER Use the silver numbered keys to change the displayed temperature and press ENTER The temperature calibration is now complete High Conductivity Salinity Calibration The conductivity salinity sensor is calibrated using solutions with a salinity of O ppt air calibration and 35 ppt Conductivity is a parameter derived from the salinity measurement and so calibrating salinity simultaneously calibrates the conductivity measurements To calibrate the sensor proceed as follows 1 First ensure that the temperature sensor is reading accurately and if necessary perform the temperature calibration described previously 2 Select calibrate Inst use arrow keys an select SAL ppt press ENTER use arrow keys to select high or low calibration set points press ENTER ESC will be displayed Press ESC to exit without changing the calibration 3 If you wish to continue for low calibration leave the probe in air a visual display of the raw data is seen on the LCD display When the raw data D is stable press ENTER the salinity calibration coefficient will then be automatically updated You will be asked if
29. glass tube Reinsert the screen and do up the two retaining screws Conductivity Sensor Maintenance To maintain the performance and accuracy of the conductivity salinity sensor the electrodes need to be periodically cleaned and if the platinum black coating is damaged the electrodes will need to be re platinised Inspect the sensor on a regular basis If there is any evidence of a build up of contamination on the electrodes then the sensor should be removed and cleaned using the platiniser unit as described below If the platinum black coating is damaged the electrodes should be cleaned and then re platinised To perform these operations proceed as follows 1 To remove the sensor lift the sensor guard and rotate the bottom section of the probe to expose the sensors Ensure that the probe and sensors are completely dry Use a cotton bud to dry the area between the sensors Pull the conductivity sensor down out of the probe by hand Do not twist the sensor Ensure that the vacant sensor socket is kept completely dry 2 clean the electrodes plug the sensor into the platiniser unit Connect the unit to 6V power supply such as lantern battery Fill the platiniser with 0 1M and switch on the platiniser for 5 minutes Switch off the platiniser and rinse with distilled water Now inspect the electrodes If the platinum black coating is intact replace the sensor in the probe assembly as described in step 5 below If the elect
30. hat was used and then the calibration coefficient will be automatically updated and the instrument will return to the calibration menu Other conductivities can be selected between 500 to 8000 us cm It is advisable to use the solution of which has the conductivity of 1413us cm The calculation for temperature correction is at its optimum when this value is used If other standards are used the temperature changes in the sample will cause small changes in the displayed conductivity Dissolved Oxygen calibration Dissolved oxygen calibration is performed using solutions with zero or 10096 oxygen saturation To prepare a sample with zero 96 saturation dissolve 26 grams of sodium sulphite in 500 ml of water and add 0 2 grams of cobalt chloride Stir the solution until the crystals are dissolved Discard the solution after 30 minutes as it will begin to absorb oxygen Alternatively an optional zero dummy probe may be used to obtain a zero point To make a solution with 10096 saturation aerate a sample of fresh water for about two hours A fish tank air pump and bubbler is ideal for this purpose When you have the calibration standards ready perform the following steps 1 Before calibrating dissolved oxygen ensure that the temperature sensor is reading accurately and if necessary perform the temperature calibration described above If you have replaced the membrane on the dissolved oxygen sensor you must wait for 2 hours after replacing the
31. he message CAL High or Low set point will appear ENTER ESC will be displayed Press ESC to exit without changing the instruments calibration If you wish to continue Select low set point and immerse the probe in a solution of the desired pH between 3 and 9 Press ENTER and the raw data will appear press ENTER when stable press ENTER and then use the numbered keys to enter the value of the standard used press ENTER the pH calibration coefficients will then be automatically updated Rinse the probe in distilled water to remove all traces of the low buffer solution Immerse the probe in a buffer solution with pH between 6 0 and 12 0 Select Cal high set point and press ENTER and a visual display of the raw data is seen on the LCD display When the data is stable press ENTER Press the arrow and number keys to change the displayed pH to the correct value whichever was selected between 6 0 and 12 0 then press ENTER the pH calibration coefficients will then be automatically updated and the instrument will return to the calibration menu ORP Calibration Oxidation reduction potential is calibrated using standard solutions producing ORP of 295 2 mV and 472 2 mV 33 To prepare the 295 2 mV solution measure out enough pH 7 buffer to cover the ORP sensor and saturate the solution with quinhydrone This will only require a small amount of quinhydrone and is best done by adding a pinch and then stirring for 30 seconds There should still be solid undi
32. if there is a depth sensor then press the ENTER key It is important to now restart the reader unit and not press any other key by powering it off by pressing the ON OFF key and powering it up again If the reader unit is fitted with an internal Bluetooth and GPS module go to Establishing Bluetooth and GPS Power in section Internal Bluetooth and GPS above The RESET function will not change or clear the calibration constants from the Reader Unit s memory However it will remove stored or logged data It will be necessary to reconfigure the display if any customization has been done to the display order 38 Battery Replacement The model 615 batteries are a battery pack and not user changeable Contact Yeo Kal Electronics D O Sensor Maintenance To maintain the performance and accuracy of the dissolved oxygen sensor the membrane should also be replaced if it becomes damaged or contaminated with organic matter Clean the membrane with cotton wool saturated with alcohol Changing the Membrane 1100 1 o ring membrane retaining ring Figure 5 Exploded view of dissolved oxygen sensor To change the membrane perform the following steps refer to figure 5 1 Remove the dissolved oxygen sensor from the probe To do this lift the sensor guard and rotate the bottom section of the probe to expose the sensors Ensure that the probe and sensors are completely dry Use a cotton bud to dry the area between the se
33. lay contrast To make this adjustment go to main menu Use the arrow keys to until the message 1 ADJ CONTRAST appears then press ENTER Now press the up or down arrow keys until the display is easier to read then press ENTER or ESC to return to the main menu Altitude and Salinity Corrections 2 The solubility of oxygen in water is less in brackish or sea water than in fresh water and also decreases with increasing altitude For dissolved oxygen concentration measurements to be accurate they must be compensated for the salinity of the water being tested and for the atmospheric pressure The YK615 will calculate the correct value of dissolved oxygen concentration and percent saturation once you have entered the altitude for the particular sample being tested salinity corrections are made automatically 1 With the instrument deployed select 1 ALT CORRECTION from the main menu and press ENTER 2 Pressthe number keys until the display shows the correct altitude in meters Press ENTER The altitude which you have entered will remain until it is changed even if you turn the instrument off Using the Reader Unit Memory Store Data Out 3 The Reader Unit has two separate memories the store memory and the logger memory The logger memory can hold up to 2135 readings and the store memory can hold up to 600 readings Once stored the data can then be down loaded into a computer via the YEO KAL software or printed at a later date The sto
34. n key the message CAL high or low set point TURB ntu ENTER ESC will be displayed Press ESC to exit without changing the turbidity calibration 2 If you wish to continue immerse the probe in distilled water press ENTER or ESC the raw data is seen on the LCD display When the data is stable press ENTER The turbidity calibration coefficients will then be automatically updated 3 Immerse the probe in solution with turbidity between 100 and 600ntu s Select Cal high set point and press ENTER a visual display of the raw data is seen on the LCD display When the data is stable press ENTER Press the number keys to change the displayed value to the correct value whichever was selected between 10 and 600 then press ENTER the turbidity calibration coefficients will then be automatically updated and the instrument will return to the calibration menu Depth calibration If the optional depth sensor is fitted then it will also require calibration To perform the depth calibration you need to lower the probe to a known depth in the water This can be done by placing a mark on the probe cable at a measured distance from the bottom of the probe assembly then 34 making sure that the probe cable is vertical lower the probe until the mark is at the surface of the water 1 Select DEPTH from the calibration key the message CAL high or low set point ENTER ESC will be displayed Press ESC to exit without changing the depth calibration 2 If you wish
35. n the Reader Unit The 615 can now be switched ON and act as an auxiliary power supply and charge the batteries at the same time The battery charger is an intelligent system that takes care of Nl cad and NI MHO Type rechargeable batteries and adjusts itself for best charging Data Port OFF ON 8 When Data Port is ON displayed data is outputted from the serial communications port This can be directly linked to a computer where data can be displayed and or stored onto a disk The unit also enables Storage of data directly into its memory while outputting data to a P C This is accomplished by Switching the unit ON then going to the set logging routine Set up the desired stop start times and sample rates Then go to main menu and switch Data Port ON Do not switch the unit OFF The unit will immediately transmit data to the serial port and start logging when the start time is reached Output displayed data only this is accomplished by Switching the unit ON then go to Main Menu and Switch Data Port ON OFF press ENTER 24 Sensor Serial Number 9 The reader reads the serial number of the probe attached to the 615 If more than one unit is used it identifies the correct probe to be used with the Reader Unit 25 Set Up Menu Set Clock 1 The clock uses 24 hour format DD MM YYYY HH MM SS After selecting Set Clock press the ENTER key and the Day start flashing use the arrow keys to change the day and press ENTER when corre
36. not get a single drop of water on the back of the ph sensor socket or in the ph socket on the probe Even finger prints on the back of the ph sensor socket can affect ph pH Membrane Sample 40 values and stability Inspect and ensure these critical areas are wiped clean and dry before assembly Carefully and firmly pull the transparent forked junction from the dark grey barrel It may help to twist the transparent forked junction to loosen the o ring seal while pulling out Attach supplied needle to pH gel electrolyte and aim needle to the bottom of the gap between glass centre and dark grey barrel The objective is to displace the old electrolyte gel with the new It may be easier to flush the old gel and contaminants out with warm water or by using a wash bottle with the aid of a paper towel When re gelling is complete reattach the transparent forked junction and slowly push into the dark grey barrel till it will not go any more As it is pushed excess gel will be forced up between the glass centre and the transparent forked junction Note Once the sensor has been serviced the pH sensor will need to be calibrated Warning Abrasive damage including scratches to the pH glass will reduce the sensor performance The above maintenance procedure is recommended prior to calibration Follow the 2 point calibration procedure for your water quality analyser In some circumstances it is feasible to calibrate without maintenanc
37. nsors Using pliers lever the dissolved oxygen sensor out of the probe Unscrew the retaining ring and remove the old membrane Check the O ring and discard if it is damaged then flush out the old electrolyte 4 Torefill with electrolyte 1 0 M KOH hold the probe vertical and place the nozzle of the squeeze bottle beside the silver electrode Squeeze the bottle to fill the probe with electrolyte until it flows over the top of the probe 5 Besurethat there are no bubbles inside the sensor Take a new membrane and centralise it on top of the electrode and let it float on the surface 7 Placethe retaining nut over the membrane and screw down firmly so that the membrane is well tensioned 8 Checkthat there are no bubbles in the electrolyte If bubbles are found repeat the above procedure 39 9 Apply a smear of O ring grease to the body of the sensor and push it back into the probe Be sure not to damage the membrane and be sure to push the sensor in until it clicks into place 10 Wait at least 2 hours for the sensor to stabilise then recalibrate the dissolved oxygen readings Dissolved Oxygen Stirrer Maintenance The Stirrer for the dissolved oxygen sensor is a magnetically operated paddle which oscillates and forces water past the sensor membrane This stirrer may occasionally become clogged particularly if the water you are testing contains a large amount of magnetic particles To remove the stirrer paddle for cleaning proceed as
38. onductivity raw data to conductivity referenced to 25 Deg C is performed using constants derived from HANDBOOK OF CHEMISTRY AND PHYSICS 1963 Chemical Rubber Publishing Company Page 2691 Conductivity of Standard Solutions using KCl 0 001 M solution Redox potential ORP conforms to International Standard IEC 746 5 Expressions of Performance of Electrochemical Analysers Part 5 Oxidation Reduction potential In accordance with this standard the Redox potential is referred to the standard normal hydrogen electrode NHE and is expressed in mV 45 Appendix 2 Compliance for probe N 10255 Appendix 3 Part Numbers Part Number YK615 001 YK615 002 YK615 003 YK615 004 YK615 005 YK615 006 YK615 007 YK615 008 YK615 009 YK615 010 YK615 012 YK615 013 YK615 014 YK615 015 YK615 016 YK615 017 YK615 018 YK615 019 YK615 020 YK615 021 YK615 022 YK615 023 YK615 024 YK615 025 YK615 026 YK615 027 Description Probe assembly Cable assembly Dissolved oxygen sensor pH ORP sensor Conductivity sensor Depth sensor Dissolved oxygen membrane Dissolved oxygen O ring Dissolved oxygen membrane retaining ring Dissolved oxygen electrolyte Platinising solution Sensor storage solution pH buffer 4 0 1 litre pH buffer 10 0 1 litre Salinity standard 35 00 ppt 1 litre Formazin solution 1 litre Battery pack Battery pack c w batteries Front panel membrane
39. possible to find the serial port assigned by going to the properties of the bluetooth device and locating services As the communication port can be handled differently by different computers On some computers the communication port will need to be re established if the 615 reader unit is powered down and up again this is possible by pressing the Open Close Port button in the software If the reader unit is powered off it is not possible to communicate with bluetooth on the 615 GPS GPS co ordinates appear on page 3 of the reader unit They appear on screen in stored data and logged data The first time the GPS is used or if the GPS has not been used for a while it may take up to 5 minutes for the satellites to lock in On subsequent uses the GPS is quicker to get a lock and position Establishing Bluetooth and GPS Power If the reader unit is reset for any reason the power to the bluetooth and GPS modules is deactivated 36 Press the MENU key Go to SETUP menu and press ENTER go to ASSIGN DEL sensor press ENTER Assign sensor will be displayed press ENTER ASSIGN AUX CHAN 0 will be displayed Press ENTER and ENTER and ENTER again then it ask are you are you sure press ENTER Then switch off the reader unit without pressing any other keys Switch on again and the Bluetooth and GPS will be powered 37 Maintenance Reader Unit Maintenance The Reader Unit requires little maintenance except to charge the batteries as necess
40. r Data Tag 41 will appear use alpha numeric and arrow keys to make a tag or ESC for no tag Arm logger 23 will be displayed then press ENTER to arm or ESC to restart and the instrument then automatically returns to displayed data The instrument is now programmed and can be switched off The logger will automatically switch on the stirrer 1 minute before the programmed measurement time and the message AUTO LOGGER Sensor warm up time please wait will be displayed When the sample has been taken the instrument will automatically shut down again until the next sample time has arrived To halt the logging process select MENU key You will then see the message Disarm logger ENT ESC press ESC to continue logging or ENTER to stop the logging routine Check Battery 7 From the main menu select check battery and press ENTER The battery voltage will be displayed and if the battery state is till acceptable the message OK will appear Push the ESC to go back to the main menu If the battery fall below 9 8 volts the display will show Batt Low and the beeper will sound Ifthe battery is not recharged and operator continues to use the unit the battery voltage will fall rapidly until the unit shuts down RECHARGE THE BATTERY AS SOON AS POSSIBLE after the message appears Before charging be sure the unit is switched off Plug the power pack unit into mains power outlet and then plug the battery charger connector into the Aux batt Charger input o
41. r of the instrument and the version number of the software loaded in the Reader Unit If the probe is connected the display will then automatically begin to show the value of readings from the probe The parameters displayed will be four parameters at one time Press the arrow keys to scroll the display through the other parameters From here the main menu is entered by pressing the MENU key If the sensor is not connected the LCD display will show no sensors have been used Press main menu to scroll through the menu options press the arrow keys to select a menu items as indicated by the arrows on the LCD display Press the ENTER key to select Main Menu or Set Up Menu You can back out of any point in the menu without changing the current settings by pressing the ESC key Key Pad Description Time Hold down key to observe the date and time on the LCD Menu Select Main menu OR Setup menu Cal Calibrate any of the sensors See Chapter O Light Press light key to illuminate LCD display Store Store data in real time and by holding down the key a data tag can be entered ESC To exit a particular routine Enter To accept a particular routine Arrows Up Down Back or Forward used in the main menu and tagging data 14 The menu options are as follows Main Menu 1 ADJUST CONTRAST 2 ALT CORRECT 3 STORE DAT OUT 4 ERASE STORE MEMORY 5 START LOGGER 6 LOGGED DAT OUT 7 CHECK BATTERY 8 SW DATA PORT 9 SENS S N Se
42. re memory is used to hold spot measurements To store a reading while in the field simply press the STORE key The data will be down loaded in the order in which it is stored so keep a record of the site at which each measurement was made so that the data can be easily analysed The operator will be asked to connect the serial data cable to the PC Press ENTER and the operator will asked to either download All data by date by tag after making selection press ENTER to proceed or ESC to go back ALL data press ENTER the operator will be asked they require calibration constants included with the data This function is useful for quality assurance procedures By date All data that falls between two dates and times will be down loaded with or without the calibration header By tag all data after a tag will down loaded with or without calibration constants included If another tag is required the operator will be asked to edit the existing data tag so that the existing tag cannot used again 16 Erase Store data 4 From the main menu press the ENTER after selecting Erase Store Mem the operator will be asked press ENTER or ESC Press ENTER to proceed and clear memory Logged Data Out 6 Data stored in the YK615 can be down loaded to a computer and then stored graphed or printed out using most popular applications The data can also be sent directly to a compatible printer When the data is down loaded it includes a header as shown in
43. rodes need to be re platinised proceed as follows 3 Tostrip the old platinum black coating from the electrodes plug the sensor into the platiniser unit fill with 5M HCl Connect the unit to a 6V power supply and switch the unit on The old platinum black will be stripped off the electrodes Once completed switch the platiniser off and rinse with distilled water 4 Toreplace the electrode coating plug the sensor into the platiniser unit and connect to a 6V power supply To make the platinising solution mix 3g of chloroplatinic acid with 0 3g of lead acetate and top up to 100ml with distilled water Fill the platiniser with platinising solution and switch the unit on for 10 minutes The electrodes will be plated with a sooty black coating When complete rinse the unit and electrodes with distilled water then fill the unit with 0 1M and switch on for 2 minutes to remove any occluded platinum black solution remaining on the electrodes Rinse the sensor and platiniser with distilled water and install the sensor in the probe assembly 42 Before installing the conductivity sensor into the probe assembly make sure that both the sensor and probe assembly are dry Apply a smear of vacuum grease to the sensor body to ensure that a water tight seal is achieved The sensor can only be installed with the connector pins aligned Align the sensor and push it into the probe assembly Be sure to recalibrate the salinity and low conductivity 43
44. so that incorrect connection cannot be made Inside the Reader Unit a CPU controls the operation of the instrument memory stores data and 8 C size rechargeable batteries power the instrument Connector Pins The connector pins on the Reader Unit connectors are numbered in clockwise order from the polarising pin see figure 1 The following table lists the purpose of each pin on the connectors Communications Pin 1 Ground Pin 2 RS232 out Pin 3 RS232 in Auxiliary Sensor 2 Pin 1 Ground Pin 2 Signal 0 5V Pin 3 12V Auxiliary Power Sensor Negative Ground Positive Data n a 12V Ground Signal 0 5V 12V alpha nurneric display N lt MODEL 615 WATER QUALITY ANALYSER gt i co arrow keys v y 1 4 ENTER key pod Manufactured by Yeo Kal Electronics Pty Ltd d ON TIME MENU CAL LIGHT STORE 01 23 45 67 89 ESC OFF ABCD GHIJKL IMNOPGR STUVW XYZO 2 x a connector cap front panel 2 Pup sd gasket COMMS front panel retaining screws O AUX BATT pin 1 or SENSOR e 0 Figure 1 Reader unit for the YK615 a Top view showing key pad and alphanumeric display b End view showing connectors Note auxiliary connectors not shown Description of Probe
45. ssolved quinhydrone in the solution If no solid is seen add an additional amount and repeat stirring until solid quinhydrone is seen To prepare the 472 2 mV standard repeat the above except use pH 4 buffer instead of pH 7 Perform the calibration as follows 1 Select ORP after pressing the Calibration key the message High or Low CAL set point ORP mv ENTER ESC will be displayed Press ESC to exit without changing the ORP calibration 2 If you wish to continue immerse the probe in 295 2 mV solution a visual display of the raw data is seen on the LCD display When the data is stable press ENTER the ORP calibration coefficients will then be automatically updated 3 Select Cal high set point and immerse the probe in solution 472 2 mV solution press ENTER a visual display of the raw data is seen on the LCD display When the data is stable press ENTER the ORP calibration coefficients will then be automatically updated and the instrument will return to the menu Turbidity Calibration The turbidity sensor is calibrated using solutions with a turbidity of O ntu distilled water and a high value between 100 300 ntu s These solutions can be prepared by diluting a concentrated formazin solution Beware formazin is a suspected carcinogen Always wear rubber gloves when handling formazin solutions Note Always clean the glass tube before calibration To calibrate the turbidity sensor proceed as follows 1 Select TURBIDITY from the calibratio
46. supply such as 240V 18VDC switched power supply a car battery or solar panel To connect the external power first attach the external power supply lead to the Reader Unit To do this unscrew the knurled connector cap from the AUX BATT connector of the Reader Unit Align the locating pin on the Reader Unit with the slot on the cable connector and push the cable connector into the Reader Unit connector then screw home the retaining ring The connector cap is attached to the Reader Unit by a chain so that it can be replaced whenever the external power is disconnected Connect the red terminal clamp to the positive terminal of your power supply and the black clamp to the negative terminal 13 Operation The YK615 comes already assembled The only construction required is to connect the probe assembly to the Reader Unit and if necessary connecting the external power supply If the pH sensor has a cap over it the cap should be removed SLIDE THE CAP OFF DO NOT UNSCREW prior to operation See section 6 for IMPORTANT INFORMATION Operating Instructions The following is provided as a quick reference for operation of the instrument To gain maximum performance and reliability from the YK615 make sure that you read and understand the entire user manual before operating the instrument The instrument is switched on or off by pressing the centre of the ON OFF key om When the unit is switched on the display will briefly show the serial numbe
47. t up Menu SET CLOCK 611 SET UP ASGN DEL SENS CONFIG DISP SET PRECISION DATE FORMAT INST TIME OUT SET FILE IN SOS 2099 oe HY Ot Ph Ne SET FILE OUT o BEEPER Et TURB AVERAGE 12 ID SENS INPUTS Auxiliary Only Alter display contrast Enter altitude for correcting D O readings Down load store data to computer Erase data entered using the STORE key Enter a logging program Down load logged data to computer Display Battery Voltage Displayed data is output through COMMS Port If available serial number of probe is displayed Adjust date amp time 611 probe installed Select assign or delete sensor Assign sensors on LCD display Sensor resolution on display Change date to country format Battery save function Restores all settings Saves all settings Audible keyboard indicator Integrate turbidity readings Sensor Channel Identification Notice that main menu option 5 START LOGGER requires that all data be cleared from memory You will be asked for conformation before memory is cleared The Reader Unit can be turned off without losing any of the instrument settings If the logger is activated the unit will continue to record measurements even if the Reader Unit is turned off 15 Adjust Contrast 1 When the instrument is used in the field variations in ambient light and temperature may make the display difficult to read This can be remedied by adjusting the disp
48. to continue select Cal low set point and make sure that the probe is above the surface of the water and press ENTER the raw data will be displayed on the LCD display press ENTER to accept this point the coefficients will then be automatically updated Select cal high set point and submerge the probe to your pre measured depth and make sure that the cable is vertical Press the ENTER key keys to from 1 to 100 meter points Press ENTER the raw data will be displayed on the display When stable press ENTER and use the number keys to change the display to the correct value then press ENTER The depth calibration is now complete 35 Internal Bluetooth and GPS The 615 reader unit has been fitted with internal bluetooth and GPS Bluetooth This method can be used to communicate to a PC Calibration real time and logged data can be transmitted from the 615 to the PC and calibration constants from the PC to the 615 To use bluetooth a bluetooth enabled PC can be used One off Pairing 1 Power on PC and ensure PC bluetooth is activated 2 Power on 615 reader unit 3 search for bluetooth devices The device name is YK615_S where is the serial number 4 Pair bluetooth device using pass code 0000 Once paired it is possible to access the allocated bluetooth serial port by the YK Quick Terminal software For the specific communication port allocated by bluetooth please check your bluetooth documentation Itis generally
49. xtra sensors it is necessary to go to the Set Up menu and go to Config Disp then press ENTER The operator will be asked to Select page 0 3 Pages 0 2 will already be allocated with 611 sensors so go to page 3 Note The previously allocated sensors can be reallocated to other pages and lines 26 To add a GPS to the display Select page 3 if the 611 is already allocated Then select the line you wish to allocate GPS to Press ENTER then use arrow keys to select the correct parameter LATITUDE and press ENTER Use the same procedure for LONGITUDE and select the next line for longitude Set Precision 5 Press ENTER and select the parameter to be measured and then press ENTER and use arrow keys to select the precision of reading eg XXX XXX Press ENTER or ESC to go to next parameter or ESC to the set up menu Connect the Reader Unit to a PC serial port and call up a previously stored calibration constants Press ENTER and WAITING FOR FILE WILL appear on the LCD display Use a terminal program to send the file to the 615 Reader Unit Note the terminal program must be set to the following protocol Baud rate 9600 Parity None Stop bits 1 Flow Control None Date Format 6 The date and time is in 24 hour format and defaults to DD MoMo YY HH MM The other format is MoMo DD YY HH MM Use arrow keys to select desired format and press ENTER to accept Instrument Timeout 7 To save battery power the 615 will shutdown if no key is pr
50. you wish to calibrate high set point ENTER or ESC 31 4 If you wish to continue for an upper calibration immerse the probe in a solution with a salinity of 30 40 ppt Press ENTER a visual display of the raw data D is seen on the LCD display When the data is stable press ENTER then use the UP DOWN arrows keys to set the salinity value of the solution that was used and then the calibration coefficient will be automatically updated and the instrument will return to the calibration menu Low Conductivity calibration 1 Select CAL C25 us cm from the Cal Key and using ARROW Keys select Calibrate instrument press ENTER after reading warning and use arrow keys to select E C us cm and press ENTER to continue or ESC and go to Cal High set point or Cal Low set point Follow the instructions on the LCD display and be sure that the raw data D is stable before accepting the data 2 Leavethe probe in air and press ENTER for zero conductivity calibration You will be asked if you wish to calibrate high set point ENTER or ESC 3 If you wish to continue for an upper calibration immerse the probe in a KCI solution To prepare the solution dissolve 0 7459 grams anhydrous in distilled water and make up the solution to 1 litre This has an electrical conductivity of 1413 umhos cm The raw data will be displayed on the display When the raw data D is stable press ENTER Then use the UP DOWN arrows keys to set the conductivity value of the solution t
Download Pdf Manuals
Related Search