Alpha COND 500
Contents
1. two beakers one for rinsing and the other for calibration Prepare separate de ionized water for electrode rinsing 2 Rinse the electrode in de ionized water and then rinse with the calibration standard 3 Dip the electrode to the calibration standard intended for calibration and swirl gently to HOLD 5 9 ps create a homogenous sample Wait for the reading to stabilize 9 4 Press the CAL key to enter calibration mode The upper display will show the measured reading based on the last calibration setting whereas the lower display will show the measured default reading of 9 the standard CAL 5 Use the A or V keys to adjust the upper iu display to the calibration standard value 3 Note You can offset the conductivity reading within T 4 40 from the default reading of the standard The 1 5 8 minimum allowable calibration point is 10 of the full scale reading of the range selected 6 Press the ENTER key to confirm the calibration value and to return to the measurement mode Note To exit this program without confirming the calibration press the A and V keys together Escape Note When there is a calibration error the buffer icon and ERR annunciator will appear together with a blinking electrode icon Press both and V keys together TWICE to return to the measurement mode el De 6 ADVANCED SETUP FUNCTIONS The advanced setup mo2. 2 No Connection 1 3 Conductivity Cell 2 NC DC input e 4 Conductivity Cell 3 Cond L O 12V to 24VDC CUR CUR4 5 Pt 100 compensate 4 Cond H 6 Pt 100 sense 5 RTDC 7 Pt 100 GND 6 RTDS 8 No Connection 7 RTDG a Figure 1 Connection Guide All wiring is done on 2 detachable connectors 1 9 pin connector located 511 position for Conductivity electrode and temperature sensor amp 2 3 connector located 512 position for power supply Using a suitable screwdriver loosen screws from top of connector When inserting the wires always hold connector with top screws facing up 2 4 Power Supply Requirements SL2 Position The Alpha COND 500 transmitter requires a 12 to 24V DC power supply Other Transmitters and or a chart recorder may be connected in the loop 1 Insert positive loop wire from power supply to pin 1 tighten screw 2 Insert negative loop wire to pin 2 tighten screw This wire may be linked to a chart recorder or to negative terminal of power supply 512 1 Alpha Power COND 500 Supply 2 512 Chart Recorder 2 2 Connecting the Electrode and Temperature Sensor SL1 Position 2 2 1 To connect the Conductivity electrode The Alpha COND 500 transmitter accepts any industrial electrodes for conductivity measurements and they are usually offer
3. in the upper display and tPr in the lower display Press the ENT key to view the temperature coefficient setup page tC O Press the ENT key to enter the setup page and use the A or keys to set the temperature coefficient value Press the ENT key to confirm your setting The transmitter will now switch to the normalization setup page tn r Setting the normalization temperature From Step 4 above 1 Press the ENT key to enter the normalization setup page Use the A or V keys to select the desired normalization temperature 25 0 C or 20 0 C SETUP 3 Enc temperature HOLD 19 SETUP HOLD SEE SETUP HOLD Eco SETUP HOLD E Eco Press the ENT key to set the normalization 4 Press A V keys together to return to the measurement mode 6 6 Cell Constant Setting You can select up to three types of cell constant in the setup mode K 1 0 K 0 1 or K 10 From the measurement mode 1 6 7 Press the ENT key to enter the setup mode Use the or V keys to scroll till LCD displays SEt in the upper display and CEL in the lower display Press the ENT key to enter the cell constant setup page Use the A or V keys to select the desired cell constant and press the ENT key to confirm the selection Press A and W keys together to return to the measurement mode Line resistance Set
4. 8 mA when the SEN conductivity readings exceed the zoom setting range This Out jaia 5 E t of Range indicator feature is applicable in the uS ranges only org 1 Press the ENT key and use A or V keys to scroll till the lower display LCD displays SEt in the upper display and org in SETUP 2 Press the ENT key again Upper display now shows wow or 9 org Lower display will show either OFF or On Use DEF A or V keys to toggle between On or OFF Press the ENT key to confirm the selection 3 Press A and W keys together to return to the measurement mode SETUP wow or g NOTE If org is set to OFF current output below the low Gn high zoom setting will be at 20 mA 518 zoom setting will be at 4 mA while current output above the 6 5 Temperature Coefficient and Normalization Temperature Setting Since different process liquid may require different temperature coefficient factor for its temperature compensation calculation COND 500 transmitter allows 0 to 10 temperature coefficient factor adjustment to cater for your different application needs You also have the selection of 25 0 C or 20 0 C for the conductivity measurement normalization temperature 6 5 1 Setting the temperature coefficient From the measurement mode 1 6 5 2 Press the ENT key to enter the setup mode Use the A or V keys to scroll till LCD displays SEt
5. 0 10 0 Range 3 0 1999 uS cm 1uS 0 1 1 0 10 0 Range 4 0 10 00 mS cm 0 01 mS 0 1 1 0 10 0 Range 5 0 19 99 mS cm 0 01 mS 1 0 10 0 Range 6 0 199 9 mS cm 0 1 mS Temperature Range 0 100 C Temperature Resolution 0 1 C Temperature Compensation Auto Pt 100 from 0 to 100 C Manual from 0 to 100 C Number of calibration points 1 Over Under range current output ON Select 3 8 mA OFF Select 4 mA under range amp 20 mA over range HOLD current output ON Select 22 mA OFF Select Last measured current value Display Custom Dual LCD Operating Temperature 0 to 100 C Power Requirements 12 to 24 VDC Load Resistance Max 600 O 96 x 96 x 66 mm 210g Only applicable in the uS range Dimension Weight 225 10 ACCESSORIES Replacement Unit Thermo Scientific Product Description aa Eutech Pt100 k 1 0 Code No Code Code No Alpha COND 500 2 Wire Conductivity TSCONCTPO0500 500 Transmitter Assembly Accessories Product Description Order Code Conductivity cell Epoxy body Graphite sensor w 3 wire ECCONSEN89X Pt100 k 0 1 Conductivity cell Epoxy body Graphite sensor w 3 wire ECCONSEN88X Conductivity 2 Cell type probe up to 20uS Cell constant K 0 01 with integrated Pt 100 Material SS316 and 25ft cable open ended EC CS10 0 01S Conductivity 2 Cell type probe up to 20 5
6. Cause a Loose connections Solution a Ensure cables are making no display b Cables not in correct good contact polarity and position b Re wire loop cables with correct polarity Unstable a Air bubbles in probe a Tap probe to remove 2 b Dirty probe bubbles Probe not deep enough b Clean probe and recalibrate sample c Ensure that sample entirely covers the probe sensors Oscillating a Electrical noise a Ensure shield wire is properly temperature interference connected to pin 7 readings Slow response a Dirty Oily probe a Clean probe Blinking ATC a No temperature sensor a Ensure temperature sensing connection during ATC mode cable are making good contact Blinking a Error in calibration a Ensure calibration standard electrode solution is not contaminated indicator Ensure clean probe is used Or a Conductivity a Ensure correct conductivity Conductivity measurement value is above measurement range is selected the specified range Or Ur b Temperature value b Ensure temperature Temperature exceeds above below the calibration is done properly specified range Ensure process temperature is within the specified range 24 9 SPECIFICATIONS Cell Constant K Conductivity Range r1 to r6 Resolution 0 1 1 0 Range 1 0 19 99 uS cm 0 01 uS 0 1 1 0 10 0 Range 2 0 199 9 uS cm 0 1uS 0 1 1
7. Cell constant K 0 01 with integrated Pt 100 Material Titanium and 25ft cable open ended EC CS10 0 01T constant K 1 0 with integrated Pt 100 Material SS316 and 25ft cable open ended Conductivity 2 Cell type probe 0 1 200 5 Cell EC CS10 0 1S constant K 0 1 with integrated Pt 100 Material 58316 and 25ft cable open ended Conductivity 2 Cell type probe up to 200 mS Cell EC CS10 1 0S NOTE Please contact your authorised distributor or dealer for the prices of extension measuring cables and other accessories like tee joints electrode assembly and calibration solutions 11 WARRANTY This transmitter is supplied with a one year warranty against significant deviations in material and workmanship from date of purchase and a six month warranty for probe Each instrument will have a warranty card with a specific serial number The warranty card must be endorsed by the Authorized Distributor at the point of sale If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period please return freight pre paid and correction will be made without charge Thermo Scientific will determine if the product problem is due to deviations or customer misuse Out of warranty products will be repaired on a charged basis Exclusions The warranty on your instrument shall not apply to defects resulting from e Improper or inadequate maintenance by customer e Unaut
8. F READY set up enable disable indicator 3 CAL Calibration mode indicator 7 uS Micro Siemens indicator 11 ERR Wrong key press error indicator 15 HOLD Hold indicator 4 R Line Resistance in Ohms 8 C Temperature indicator 12 Electrode indicator 16 READY Ready indicator 4 2 Keypad SCIENTIFIC Alpha COND 500 MEAS T 1413 D 250 2 wire Conductivity Transmitter The four button keypad allows easy and quick operations of the Transmitter Key Function CAL Brings you directly into the Calibration mode If you were in Conductivity Measurement mode press CAL to enter Conductivity Calibration mode A V To scroll through the various submenus To increment decrement values or toggle between options in the SETUP CAL modes When pressed together serves as escape function to return to MEAS mode from any point CAL or SETUP modes ENT To confirm your calibration values in Calibration mode To confirm selections in SETUP mode While in MEAS mode pressing ENT takes you directly to SETUP submenu NOTE Error indicator ERR will be displayed if an invalid key is pressed during a particular operation 5 CALIBRATION 5 1 Important Information on Transmitter Calibration Calibration should be carried when you are using your transmitter with a new electrode for
9. Instruction Manual Alpha COND 500 2 Wire Conductivity Transmitter HS mS Alpha COND 500 EUTECH DOT PPM ee 68X216867 Rev 2 Mar 2008 Part of Thermo Fisher Scientific ees Tug e Preface This manual serves to explain the use of the Alpha COND 500 transmitter It functions in two ways firstly as a step by step guide to help you to operate the transmitter Secondly it serves as a handy reference guide It is written to cover as many anticipated applications of the transmitter as possible If there are doubts in the use of the transmitter please do not hesitate to contact the nearest Authorized Distributor Thermo Scientific will not accept any responsibility for damage or malfunction to the transmitter caused by improper use of the instrument The information presented in this manual is subject to change without notice as improvements are made and does not represent a commitment on the part of Thermo Scientific Copyright 2004 All rights reserved TABLE OF CONTENTS 1 0 5 0 4 1 2 PREPARATION E AR RR Ra d nna 2 2 1 POWER SUPPLY REQUIREMENTS SL2 3 2 2 CONNECTING THE ELECTRODE AND TEMPERATURE SENSOR SL1 POSITION 3 3 eres de eren c
10. ON coa idea vaa na co Foo raura do Vu a anu 22 7 FACTORY DEFAULT SETTINGS 23 8 TROUBLE SHOOTING 27 14 1 24 9 SPECIFICATIONS entia neun 25 10 85 22 2 222002 00 26 11 WARRANTY 5 i ciet eror exea Ebro au oer Dd 27 12 RETURN 27 1 INTRODUCTION Thank you for selecting an Alpha COND 500 2 Wire Transmitter This isolated output 4 20mA transmitter is a sturdy microprocessor based instrument that measures conductivity and temperature and transmits its output via the 2 wire power supply loop This transmitter has many user friendly features all of which are completely accessible through the water resistant membrane keypad Your transmitter includes an instruction manual and a warranty card Please read this manual thoroughly before operating your transmitter READY 2 PREPARATION Remove screws from the four corners at the back of the Transmitter and remove back cover Connectors should be exposed as follows POWER SUPPLY SL2 CONNECTION GUIDE 1 Positive ve power supply 2 Negative ve power supply 3 No connection E 15 SL1 CONNECTION GUIDE S 1 No Connection 51
11. aa 5 3 1 MECHANICAL 5 85 5 3 2 MOUNT 5 550 ci exta rre Pa or a entre 5 3 3 PANEL MOUNT a 6 4 DISPLAY AND KEYPAD 7 4 1 DISPLAY uan 7 4 2 KEYPAD 8 5 CALIBRATION eie coo rie ei d 9 5 1 IMPORTANT INFORMATION ON TRANSMITTER 9 5 2 TEMPERATURE CALIBRATION 7 11 5 3 CONDUCTIVITY CALIBRATION ccsccssscsccoscccsccvecseccsccsneessesseonscevesstectectacsuasenens 12 6 ADVANCED SETUP 8 2 13 6 1 RANGE AND ZOOMING SELECTION 4 13 6 2 TEMPERATURE COMPENSATION 15 6 3 HOLD CURRENT 18 6 4 OUT OF RANGE CURRENT SETTING 2 18 6 5 TEMPERATURE COEFFICIENT AND NORMALIZATION TEMPERATURE SETTING 19 6 6 CELL CONSTANT SETTING eee earn erae dansk e ner aaa na aa dora daa 20 6 7 LINE RESISTANCE 20 6 8 VIEWING CALIBRATION enne n nnne enne nnn nns 21 6 9 VIEWING THE ELECTRODE 21 6 10 RESET FUNCTI
12. ctivity high zoom value for the 20 mA current and press the ENT key to confirm and return to the range setup mode Press both A and V keys together to return to the measurement mode 14 6 2 Temperature Compensation Setting Conductivity readings are affected by temperature Under varying temperature conditions use ATC to compensate for the conductivity values If temperature of sample is constant and a temperature sensor probe is not available Manual Temperature Compensation can be utilized 6 2 1 Automatic Temperature Compensation For automatic temperature compensation ATC selection connect the ATC sensor to the transmitter as described in Section 2 2 2 1 6 Press the ENT key to enter the setup mode Use the or V keys to scroll through the sub menus till LCD displays SEt C Press the ENT key to enter the temperature compensation mode Display shows AtC Off Use A or V keys to select AtC On and then press the ENT key Dip ATC sensor into a solution of known temperature i e a temperature bath Allow time for temperature sensor to acclimatize with surrounding bath temperature Use A W keys to adjust the displayed reading to the correct temperature value according to the temperature bath Maximum adjustments allowed is 5 C 9 F from the default reading Once you have adjusted to the correct temperature value press the ENT key to confirm the s
13. de lets you customize your transmitter s preferences and defaults This transmitter features different sub groups that organize all setup parameters The sub groups are 6 1 Range and Zooming Selection Setting Your COND 500 transmitter provides six selections of conductivity measurement ranges to suit your process application needs Zooming selection is available where both the 4 mA and 20 mA output current can be assigned to specific conductivity values for a more refined output From the measurement mode 1 Press the ENT key to enter the setup mode 2 t t Transmitter displays SEt rng indicating the rng range setup mode 2 Press the ENT key again The display will show the last set conductivity measurement range SETUP 3 Use the A or V keys to scroll through the six ranges and press the ENT key to select your 22 1999 desired range The transmitter will now switch to the zooming selection and display the low zoom value setup NOTE Range 6 selection page will only appear in the setup mode when the cell constant is selected as K 1 0 or K 10 Range 1 will only appear when cell Six Range selection constant is selected as K 0 1 or K 21 0 ri 2135 For zooming setting use the A or V keys to set the conductivity low zoom value for the 4 mA current and press the ENT key to confirm The transmitter now displays the high zoom value setup Use the A or V keys again to set the condu
14. easured default reading of the calibration standard The minimum allowable calibration point is 1096 of the full scale reading of the range selected For best results select a standard value close to the sample value you are measuring Alternatively use a calibration solution value that is approximately 2 3 the full scale value of the measurement range you plan to use The following table 1 lists the corresponding conductivity ranges You should calibrate in the range that you have selected using a solution that falls between the values in the recommended calibration solution range column Table 1 Conductivity Measuring Range Recommended Calibration Solution Range 0 00 gt 19 99 uS 6 00 to 17 00 uS 0 0 199 9 uS 60 0 to 170 0 uS 0 1999 uS 600 to 1700 uS 0 00 gt 10 00 mS 6 00 to 7 00 mS 0 00 gt 19 99 mS 6 00 to 17 00 mS 0 0 199 9 mS 60 0 to 170 0 mS To view current calibration point see Section 6 8 Viewing Calibration Do not reuse calibration solutions after calibration Contaminants in the solution can affect the calibration and eventually the accuracy of the measurements Use fresh calibration solution each time you calibrate your meter NOTE Your transmitter is factory set to a temperature coefficient of 2 196 per C For most applications this will provide good results The factory default value for normalization temperature is 25 C If you need to set a diff
15. ed for proper contact 3 INSTALLATION 3 1 Mechanical Dimensions Thermo Alpha COND 500 95 6 Esc 2 wire Conductivity Transmitter 3 2 Wall Mount For wall mount Holes at both side have to be pierce through Overlays to cover the holes 3 3 Panel Mount 1 Prepare panel cut out of 92 0 mm by 92 0 mm 7i Panel side 2 Remove back cover of transmitter and slide it through panel cut out Gasket 4 Thread rods through lugs until transmitter is held in place against panel 3 Attach lugs to either side of transmitter 4 DISPLAY AND KEYPAD FUNCTIONS 4 1 Display The LCD has a primary and secondary display e The primary display shows the measured conductivity value e The secondary display shows the measured temperature In Calibration mode measured conductivity values are displayed here SETUP 16 READY 15 144 13 12 11 10 Primary Display Upper Display MEAS CAL 000 Lower Display 1 SETUP Setup mode indicator 5 Temperature Coefficient indicator 9 ATC Automatic Temp Compensation 13 m Calibration standard indicator 2 MEAS Measurement mode indicator 6 mS Milli Siemens indicator 10 K Cell Constant indicator 14 ON OF
16. ed with bare wires 1 Insert the electrode s conductivity wire Low into pin of SL1 connector Tighten the screw 2 Insert the electrode s conductivity wire High into 4 of SL1 connector Tighten the screw Pt 100 Input wire Pt 100 Sense wire Pt 100 Return wire Conductivity wire High Conductivity wire Low Shield wire To Electrode 2 2 2 To connect ATC temperature sensor For Automatic Temperature Compensated ATC Conductivity readings an in built temperature sensor is usually integrated in the industrial conductivity electrodes Otherwise a separate 1000 Pt RTD temperature probe be used 3 wire temperature sensor 1 Insert the Pt100 input wire to pin 5 of SL1 connector Tighten the screw 2 Insert the Pt100 sense wire to pin 6 of SL1 connector Tighten the screw 3 Insert the Pt100 return wire and the shield wire to pin 7 of SL1 connector Tighten the screw 2 wire temperature sensor 1 Take a small length of wire and short pins 5 and 6 of SL1 connector Insert Pt 100 sense wire into pin 6 of SL1 connector and tighten the screws 2 Insert Pt 100 return wire and the shield wire to pin 7 of SL1 connector Tighten the screw IMPORTANT It is necessary to connect the SHIELD wire to the pin 7 as stated above to eliminate possible oscillation of the conductivity and or temperature reading due to electrical noise or interference Ensure that no bare wires are exposed and all screws are tighten
17. erent temperature coefficient or change the normalization temperature value see Section 6 5 Temperature Coefficient and Normalization Temperature Setting for further information NOTE In the CAL mode the 4 20 mA output current will be automatically held HOLD will be displayed on LCD After calibration is performed and when the transmitter is back to the measurement mode the HOLD is automatically released Please refer to section 6 3 for more details 10 5 2 Temperature Calibration You need to perform temperature calibration if your transmitter temperature reading is inaccurate or if the transmitter s cell constant setting is changed It is because the transmitters temperature offset calibration will be erased once a new cell constant is selected It is important to ensure that temperature calibration is carried out first prior to conductivity calibration since temperature readings affect the accuracy of conductivity measurements Your transmitter allows a one point temperature calibration using reference of a thermometer known to be accurate Please refer to Section 6 2 Temperature Compensation Setting for temperature calibration procedure ES 5 3 Conductivity Calibration A 1 point Calibration is required for this transmitter If MEAS the calibration process is aborted your transmitter 1 5 a ES will revert to the previous calibration data er 1 Organize your calibration standard solution e 5
18. etting Press and V keys together to return to the measurement mode The ATC indicator will light up on the LCD NOTE If you are using a temperature sensor the sensor must be submersed in the liquid you are measuring 6 2 2 Manual Temperature Compensation For manual temperature compensation you can set the process and calibration temperatures This allows calibration at a temperature other than the process temperature Example setting a calibration temperature of 25 C lets you calibrate using standard solutions at 25 C even if your process temperature is different from 25 C From the measurement mode 1 2 T Press the ENT key and use A or Y keys to select SEt C Press the ENT key to enter the temperature compensation mode Display shows On or Off Use A or V keys to select Off and then press the ENT key The primary display will show temperature default is 25 0 and the secondary display shows P C This is the page for setting the temperature of your process or sample by using an accurate thermometer as reference Use A or V keys to set the transmitter to the temperature of your process or sample Press the ENT key The primary display shows temperature default is 25 0 and secondary display shows C C This is the page for setting the temperature of your calibration solutions Use A or V keys to set the transmitter to the temperature of y
19. horized modification or misuse e Operation outside of the environment specifications of the products 12 RETURN OF ITEMS Authorization must be obtained from our Customer Service Department or authorized distributor before returning items for any reason A Return Goods Authorization RGA form is available through our authorized distributor Please include data regarding the reason the items are to be returned For your protection items must be carefully packed to prevent damage in shipment and insured against possible damage or loss Thermo Scientific will not be responsible for damage resulting from careless or insufficient packing A restocking charge will be made on all unauthorized returns NOTE Thermo Scientific reserves the right to make improvements in design construction and appearance of products without notice 227 5 For more information on our products contact your nearest distributor or visit our website listed below Thermo Scientific Oakton Instruments Water Analysis P O Box 5136 Environmental Instruments Vernon Hills IL 60061 USA Blk 55 Ayer Rajah Crescent Tel in U S 888 462 5866 04 16 24 Singapore 139949 Tel outside U S 1 847 549 7600 Tel 65 6778 6876 Fax 1 847 247 2984 Fax 65 6773 0836 E mail info 4oakton com E mail eutech thermofisher com Web site http www 4oakton com Web site http www thermo com process Distributed by
20. ill only show the calibration point for the selected measuring range If there is no calibration done in the selected range the display will show 6 9 Viewing the Electrode Data The COND 500 transmitter lets you check the electrode s parameters for diagnostic purposes This option shows you the current effective cell constant and its range The cell constant is adjusted according to your calibration From the measurement mode 1 Press the ENT key to enter the setup mode Use the A or V keys to scroll till LCD displays ELE in the upper display Press the ENT key to enter the electrode data viewing page The display will show the current effective cell constant and its range Press and V keys together to return to the measurement mode aD SETUP E L E SETUP 1 1000 6 10 Reset Function SETUP The reset function lets you choose to either reset the too t transmitters conductivity calibration only or conductivity calibration plus all setup functions that you might have changed back to factory default settings However the temperature compensation setting as in Section 6 2 will remain unchanged From the measurement mode SETUP 1 Press the ENT key to enter the setup mode Use r 5 the or V keys to scroll till LCD displays rSt in CAL the upper display 2 Press the ENT key to enter the reset page Use the A
21. or W keys to toggle between CAL and FCT for reset type selection SETUP e CAL reset conductivity calibration only t e FCT reset conductivity calibration and all setup functions back to factory default FEE 3 Press the ENT key to confirm your selection The lower display will blink momentarily before returning to the reset function setup mode 4 Press A and Y keys together to return to the measurement mode 7 FACTORY DEFAULT SETTINGS SETUP DEFAULT PAGE EUNGTION SETTING Selection of effective conductivity range 1999 uS r3 SET rng Setting low zooming selection 0 uS Lo Setting high zooming selection 1999 uS Hi SET Selection of Automatic or Manual MC On Temperature Compensation SET HLd Selection of HOLD current to be of 22 mA or HLd OFF the last current output value Selecting Out of Range current output to be SET org constant 3 8 mA or 4mA for under range org OFF and 20 mA for over range SET tPr Setting Temperature Coefficient 2 196 Setting Normalization Temperature 25 0 C SET CEL Selecting the various cell constant K 1 0 SET Lnr Setting the line resistance value 0 00 CAL Viewing current calibration point r3 ELE Viewing electrode s current cell constant K 1 000 r3 rSt Selection of calibration reset or factory rSt CAL rSt FCt default reset 8 TROUBLE SHOOTING GUIDE Problem Power on but
22. our calibration solutions Press the ENT key Press and Y keys together to return to the measurement mode The transmitter will now compensate conductivity readings for the manually set temperature values taken from P C 16 SETUP SEE L SETUP ee o o REC REC OFF SETUP SETUP 00 258 Cd POC SETUP 258 Temperature Compensation Setting Chart Alpha COND 500 Transmitter 6 3 HOLD Current Setting When Transmitter is in CAL or SETUP modes it automatically goes into a HOLD mode To indicate Transmitter is in HOLD mode output current can be set to 22 mA output by activating the HLD On 1 Press the ENT key and use or V keys to scroll till LCD displays SEt in the upper display HLd in the lower display Press the ENT key again 2 Upper display now shows HLd Lower display will show either OFF or On Use A or V keys to toggle between On or OFF Press ENT to accept selection 3 Press A and W keys together to return to the measurement mode NOTE If HLd is set to OFF then current output will be equivalent to last measured value 6 4 Out of Range Current Setting SETUP O SETUP Hid OFF SETUP Hid un The transmitter can be set to give a fix current output of 3
23. the first time or when you suspect that the transmitter electrode is out of calibration Your transmitter allows you to perform temperature calibration and conductivity calibration As temperature readings affect the accuracy of conductivity measurements it is recommended that temperature calibration should be carried out only if the temperature value displayed on the transmitter is different from that of a calibrated thermometer A temperature offset calibration of 5 C from the default reading is allowed Once a temperature calibration is performed conductivity calibration should be carried out to ensure the accuracy of conductivity measurements are maintained Your transmitter has up to six selectable conductivity measuring ranges The selection for the sixth range range 6 0 00 to 199 9 mS cm only appears in the Setup mode if the cell constant is selected to be K 1 0 or K 10 whereas range 1 0 00 to 19 99uS cm will only appear when cell constant is selected to be K 0 1 or K 1 0 Other wise the selection will be limited to five ranges only You can only calibrate one point in the measuring range that you have selected for your process application You have to recalibrate your transmitter every time you change the measuring range since the calibration data of your transmitter will be erased every time a new measuring range is selected During conductivity calibration the transmitter allows a calibration window of 40 from the m
24. ting SETUP SEE Line resistance of an electrode cable constitutes to error in measurement of high conductivity values as in range 6 This error can be compensated by inputting the electrode cable line resistance value in the setup mode From Range 6 measurement mode 1 Press the ENT key to enter the setup mode Use the A or V keys to scroll till LCD displays SEt in the upper display and Lnr in the lower display Press the ENT key to enter the line resistance setup page Use the A or V keys to set the line resistance value 0 to 50 ohms and press the ENT key to confirm the setting Press and W keys together to return to the measurement mode NOTE The line resistance setup mode can be accessed only from range 6 measurement mode 20 SETUP t SETUP 000 6 8 Viewing Calibration Point This mode lets you view the current calibration point and its range From the measurement mode of a selected measuring range 1 Press the ENT key to enter the setup mode Use the A or V keys to scroll till LCD displays CAL in the upper display Press the ENT key to enter the calibration point viewing page The display will show the current calibration point and its range Press and V keys together to return to the measurement mode SETUP CAL 12 88 r5 NOTE This setup mode w
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