Analytical Instruments: Honeywell DL5000 Dissolved Oxygen (D.O.
Contents
1. 14 TROUBLESHOOTING M Wu c 15 5 1 Diagnostic Error Messages 0 424 425 15 5 2 Troubleshooting 7020 ANY icit ooi ee ee ene e Gre dns Cia ees 17 5 3 Processes Containing Carbon 17 5 4 Leak Detection in PPB Applications mmm 18 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Tables Table 3 1 Integral Mounting Procedure Figure 3 1 Table 3 2 Remote Mounting and Wiring Procedure for DL5000 Probes Table 5 1 Online Diagnostic Errors Figures Figure 3 1 Integral Mounting Figure 3 2 Remote Wiring Figure 3 3 Connect Disconnect Sequence for the Series 7020 D O Analyzer Figure 3 4 Waste Water Mounting Figure 3 5 In Line Mounting Kit Figure 3 6 Flow Through Mounting Figure 3 7 Mounting Recommendation for Easy Calibration in Boiler Control Loop 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual OND 10 12 vi DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Introduction 1 Introduction 1 1 Overview This document provides description specification installation mounting maintenance and trouble shooting information for the Honeywell DL5000 Dissolved Oxygen D O probe This probe can be used with the DL424 DL425 or the 7020 Series Dissolved Oxygen analyzers 1 2 Probe Description The Honeywell probe is housed in either PVC or2. The sample should be discharged to Atmospheric pressure open drain 10 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Installation The flow through mounting is diagramed in Figure 3 6 1 5 16 s Kits 51452187 001 Stainless Steel 51452187 002 PVC Outlet Male Compression Fitting for 1 4 O D Tubing Dissolved Oxygen Probe 9 1 2 Replacement O ring 30669860 017 Flow Through Adapter Male Compression Fitting for 1 4 O D Tubing A Inlet Figure 3 6 Flow Through Mounting 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual 11 Installation Mounting Recommendation for Easy Calibration in Boiler Control Loop A Trap arrangement should be plumbed in the incoming flow to the DO probe so that if flow is shut off or an Upstream pipe opened water will remain around the tip of the probe Keeping it moist on the outlet side an arrangement such as a TEE should be made to assure that when the 3 way valve is opened for Air Calibration the water within the probe flows out Cracking the fittings on the inlet side will achieve the same result as a 3 way valve but repeated Cracking will cause wear on the parts and any additional handling may shorten the life of the probe FLOW Figure 3 7 Mounting Recommendation for Easy Calibration in Boiler Control Loop To avoid drying out the probe sensor when the sampling point is shut off a water trap should be made in the inlet p
3. 7020 manual Probe and Analyzer Tests e To confirm the D O measurement in air at a specific temperature consult Appendix E in the 7020 manual Percent Saturation Readout to get the expected DO concentration in air or air saturated water at various temperatures This information will confirm if the probe is giving a valid measurement in air e lfaleakis suspected in a ppb system consult Appendix F in the 7020 manual Leak Detection in PPB Applications to understand how to use the D O probe to find a leak e Want proof that a D O probe can go down to zero ppbs Consult Appendix G in the 7020 manual Procedure for Low level ppb Dissolved Oxygen testing to confirm that your probe can get down to zero ppbs 5 3 Processes Containing Carbon Dioxide 5 02 When measuring D O in a process containing carbon dioxide e g beer or soda special procedures are required to protect the probe To remove the probe from the line 1 Shut off sample line containing CO 2 Purge the line containing the probe with fresh water at the same pressure for 15 minutes to remove the CO from the D O probe 3 Remove probe when convenient CAUTION Not following this procedure will cause internal rupture of the membrane rendering the probe inoperable un repairable and void of any probe warranty For optimum performance in this application the bias voltage should be adjusted to measure 450 mV instead 600 mV Review the Series 7020 operato
4. Stainless steel casing One end has a 1 NPT male thread for mounting The sensor extends from the housing and is covered by a protective guard of the same material as the casing which allows sample entry while preventing physical damage The probe has permanent electrolyte which is sealed at the rear with an expansion chamber to compensate for pressure changes The sensor assembly is permanently potted into the housing and is not field replaceable Operational service in wastewater applications should consist of an occasional wash to remove any large deposits at the sensor end This can usually be accomplished without removing the protective guard If the protective guard is removed additional care must be taken to minimize the chance of puncturing a hole in the probe membrane See Probe Maintenance section for proper cleaning procedures Physically the probe consists of three electrodes and a thermistor for temperature measurement and compensation Two electrodes are interspaced on a supporting substrate and covered with an electrolyte these electrodes are connected as anode and cathode The third or reference electrode is mounted in the center of the electrode support and is also in contact with the electrolyte The anode and cathode perform the oxygen generation and reduction functions while the reference electrode maintains the correct electrochemical potential 1 3 Operating Principal 5 02 When the probe is placed into the sample str
5. 0 Series analyzer CAUTION When installing the probe the wiring must be done in the order shown in Figure 3 3 even if the analyzer is not powered This is because the battery backup card is continuously supplying a voltage bias to the terminals Connecting Shield wire first TB5 then in this order 33 Red Green ANODE Red Coax REF Green CATH SILVER PIN Coax THERM Yellow Disconnecting Go in reverse THERM Orange Orange first SHIELD White Black Yellow amp ALL Eds ALL Green S Red Shield Wire 40 Figure 3 3 Connect Disconnect Sequence for the Series 7020 D O Analyzer DL5000 Dissolved Oxygen D O Probe User s Manual 7 Installation Probe System Check When the probe is connected for the first time replaced or just disconnected and reconnected a conditioning period of 24 hours is needed before the probe can make an accurate measurement During this time period the probe must be kept wetted by either putting it in the process water or in a container of water exposed to air For ppb applications it is recommended that process conditions are used Once the 24 hour period has elapsed the probe can be calibrated The calibration instructions are as follows 1 Remove probe from either the process or container of water and put in ambient air If probe was in process wastewater clean probe first per cleaning instructions under the maintenance section I
6. Assembly A Figure 3 4 Waste Water Mounting 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual Installation In line Flow Mounting In applications where the probe goes directly into the process pipeline the in line flow mounting is available This mounting is diagramed in Figure 3 5 30669860 017 O ring 3 4 NPT REF Customer Installation Kit 51452226 001 SST 51452226 002 PVC Figure 3 5 In Line Mounting Kit Flow Through Mounting In most low ppb applications the Pure Water Flow Through mounting is recommended This assembly is usually pipe clamp mounted close to the sampling port A single 1 pipe clamp is normally all that is needed for physical mounting Inlet and outlet fittings are designed to mate to 74 O D tubing ATTENTION When assembling the flow through kit extreme caution must be used when installing or removing the probe flow assembly from the probe The assembly threads can cut the membrane if they contact it especially the stainless steel assemblies In ppb applications the integrity of the sample lines feeding the ppb probe is of extreme importance Since the oxygen level in air is usually three orders of magnitude greater than the sample level oxygen can leak into the sample lines without any indication of liquid leaking out resulting in erroneous readings To reduce risk of leaks use a minimum number of fittings in the sample lines and make sure each fitting is tightened
7. ESS CONTROLS 1100 VIRGINIA DRIVE PA 19034 3260 FT WASHINGTON U S A Tel 1 800 343 0228 VENEZUELA HONEYWELL CA APARTADO 61314 1060 CARACAS VENEZUELA Tel 58 2 239 0211 Honeywell Industrial Process Control Honeywell 1100 Virginia Drive Fort Washington PA 19034 70 82 25 114 0502 Printed in USA www honeywell com ipc
8. Honeywell DL5000 Dissolved Oxygen D O Probe User s Manual 70 82 25 114 5 02 Industrial Process Control Notices and Trademarks Copyright 2002 by Honeywell May 2002 Warranty Remedy Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship Contact your local sales office for warranty information If warranted goods are returned to Honeywell during the period of coverage Honeywell will repair or replace without charge those items it finds defective The foregoing is Buyer s sole remedy and is in lieu of all other warranties expressed or implied including those of merchantability and fitness for a particular purpose Specifications may change without notice The information we supply is believed to be accurate and reliable as of this printing However we assume no responsibility for its use While we provide application assistance personally through our literature and the Honeywell web site it is up to the customer to determine the suitability of the product in the application Industrial Process Control Honeywell 1100 Virginia Drive Fort Washington PA 19034 DirectLine is a trademark of Honeywell Other brands or product names are trademarks of their respective owners ii DL500 Dissolved Oxygen D O Probe User s Manual 5 02 About This Document Abstract This manual provides description specification installation mounting maintenance and troubleshooting infor
9. Remove the probe from the process and do an Air Calibration These errors may occur during Air Sample and Probe Bias calibration and abort the calibration process FAIL These error messages are preceded by the message FAIL ArnG Air Calibration failed due to a measured probe current not in the acceptable range Stbl Air Calibration failed due to input measurement instability bErr Bias voltage calibration failed due to unacceptable input current Replace Probe Press Mode to return to online display 16 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Troubleshooting 5 2 Troubleshooting 7020 Analyzer The Honeywell 7020 Series Operator manual contains many tips for trouble shooting the 7020 Series analyzer Consult the Matrix of Potential Problems and Solutions under Section 5 2 in the Operator manual for information on your particular problem In addition the appendix section of the Honeywell 7020 Series Operator manual provides information on various subjects related to the D O probe including the following topics e Excess AC noise can result in a shorten probe life To ensure that there is no excess noise on the probe leads use the procedure in Appendix A in the 7020 manual Noise Testing to test your probe installation e Ifa D O reading doesn t seem correct check that the probe and analyzer are working correctly by using the procedures provided in Appendix B in the
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12. at calibration conditions after stabilization Probe Materials of Construction PVC or Stainless Steel with a 20 ft Probe Dimensions same for PVC amp SS Probe Weight ATTENTION 6 1m waterproof cable The PVC model is also available with a 100 ft 30 48m waterproof cable 8 62 long X 1 315 OD 219 X 34 mm PVC 1 24 Ib 0 6 kg SS 3 5 Ib 1 5 kg Probe membrane must be kept wetted both in the process and during storage See Storage under Maintenance section The silicone membrane surrounding the D O probe is permanent If this membrane is removed by user for any reason the warranty on the D O probe is voided DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Specifications 2 2 Model Selection Guide Instructions e Select the desired key number The arrow to the right marks the selection available Make one selection from Tables 8 II using the column below the proper arrow A dot denotes unrestricted availability Key Number II HI a ik ES KEY NUMBER Availability DescmerON Selection po ee bn oss e mem 4 DL5000 Dissolved Oxygen Probe Parts Per Million DL5PPM TABLE Probe Construction Material of Construction Mounting Cable Length None 100 Integral 316 Stainless Steel 200 PVC 20 300 Remote 316 Stainless Steel 400 TABLE Il Options i Linen Customer I D Tag Tagging 3 lines w 22 characters line Standard Warranty Extended War
13. dule aligning polarity tab of module housing and mating groove on connector DL5000 Dissolved Oxygen D O Probe User s Manual 5 Installation DL5000 Probe Electronics Pigtail Shield Black White Temperature Compensation Orange Temperature Compensation Yellow Anode Red Reference Green Cathode Silver Pin Coax n Earth Ground Blue mim Electronics Module C ED d gt Protectiv Vinyl Boo Si remove Cover Strain Relief RE Compression Cap Remote Wiring Cable A Tr Probe Remote Electronics for Module DL5000 Dissolved Oxygen Probes Figure 3 2 Remote Wiring 6 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Installation Series 7020 Remote Mounting and Wiring 5 02 When connecting the probe to the Series 7020 Analyzer the probe wiring should always be kept separated from the AC power wiring After the analyzer and probe have been securely mounted the probe should be connected to the analyzer Before wiring remove the protective insulator tape from the green lead To make wiring easier on the 7020 Series analyzer loosen the screw at the bottom of the terminal board and remove the terminal block from the panel while wiring Figure 3 3 gives the sequence for connecting and disconnecting the probe from the 702
14. e silver reference electrode over time resulting in a shortened probe life See Appendix A in the 7020 Operator manual for directions on Noise testing 8 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Installation 3 2 Probe Mountings Wastewater Submersion Various mounting are available for the Honeywell D O probe Figure 3 4 shows the probe mounting kit for Wastewater Submersion Except for the 1 schedule 40 PVC pipe or conduit this kit contains all pieces needed to mount the probe to 1 1 2 diameter safety railings The length of the pipe or conduit governs the depth of the probe immersion while the angle piece governs the horizontal distance To minimize debris build up place the probe into the process at a 45 angle from the horizontal pipe railing The cable can be routed though the supporting pipe or tied to its side If the kit is not used and plastic pipe is preferred use 1 to 1 72 coupling The use of the pipe is suggested to avoid whipping of the pipe when used in flowing or turbulent water D O Receiver Pin Fitting 2 req d 31063325 Note location of pins Wrench 31063326 Clamp on Tee 2 req d 31063327 m 1 Pipe Size Eye Fitting 2 req d hy 31063329 11 2 Pipe Size i 24 to 30 Long d 1 1 2 Pipe Size N T X 1 6 to 8 Long Female ges Coupling 31063330 x Single Socket Tee j A oh 31063328 A EEE yo zo ia 4 E
15. eam oxygen diffuses through the membrane and is reduced at the cathode and an equal amount of oxygen is generated at the anode The diffusion continues until the oxygen partial pressure on both sides of the membrane is equal and a balance exists The electrical circuit is designed such that the current necessary to maintain this equilibrium is converted to read out the dissolved oxygen concentration in the solution The reactions are as follows At cathode 4H 4e gt 2H20 At anode 2H20 gt O2 AH 4e Result No net reaction DL5000 Dissolved Oxygen D O Probe User s Manual 1 Specifications 2 Specifications and Model Selection Guide 2 1 Specifications Normal Operating Temperature Range Storage Temperature Maximum Flow Rate Maximum Pressure Response time Probe Accuracy 2 60 35 6 140 2 60 35 6 140 F See Attention No dependence on stirring or flow However a minimal flow of 100 ml min is expected to provide a flowing sample for flow through mounting 300 ml min for in line mounting 5 gal min 18 9 liter min in a 1 Schedule 40 Line for submersion mounting Not applicable 30 psi 207 kPa for PVC probe 50 psi 345 kPa for SS probe 90 in 60 seconds after Probe Warm up in parts per billion ppb measurements 5 or 2 ppb whichever is greater at calibration conditions after stabilization in parts per million ppm measurements 0 2 ppm
16. en drops precipitously toward zero in a matter of a few hours or less Proper air calibration can be restored only after very careful wiping of the probe tip or a 30 second rinse in a 10 HCI solution The time between cleanings can be extended by relocating the probe to a cleaner environment nearer the effluent or relocating the probe to where the water is flowing faster After these actions are taken a cleaning schedule should be established ATTENTION Never use a brush to clean a Honeywell D O probe as it can cause a tear in the probe membrane rendering it inoperable This type of abuse is not covered under probe warranty DL5000 Dissolved Oxygen D O Probe User s Manual 13 Maintenance 4 2 To Clean Cleaning should consist of the simplest of the following required to re establish proper performance 1 Rinsing with water 2 rinse with mild detergent followed by water 3 rinse with 10 HCI followed by mild detergent followed by water If the probe must be wiped carefully use a paper towel or cotton swab After cleaning is completed place the probe back into the process and allow 60 minutes before a calibration 4 3 O Ring Replacement To replace the O ring shown in Figure 3 6 1 Place the o ring over the threads of either the flow through or in line fitting 2 Silicone grease may be used to assist in O ring installation 3 Attach the adapter to the probe Be careful not to touch the probe membrane 4 4 Probe Sto
17. f the probe is in a ppb process expose the probe to air for 2 4 hours before doing an Air calibration 2 Perform an Air calibration or Sample calibration Make sure probe temperature is stable before performing an Air calibration If temperature is not stable the Air calibration will fail ATTENTION Do not perform an Air calibration on a windy day or during freezing temperatures The temperature will not stabilize on a windy day and freezing temperatures will cause the probe s electrolyte to freeze and the membrane to crack 3 At completion of a successful air or sample calibration put probe into process water After the initial calibration the probe should only be removed from the process for periodic cleaning and calibration The recommended cleaning schedule for ppb applications is monthly and for ppm applications it is bimonthly If the probe s response has slowed or readings are lower than expected prior to the recommended cleaning schedule the probe may need to be cleaned more frequently The recommended calibration schedule for ppb and ppm applications is monthly If individual plant maintenance schedules require it the probe may be calibrated more frequently System Check for Probe with Model 7020 Perform a system check upon completion of all wiring AC noise in the various analyzer output connections may affect the bias amplifier resulting in a DC current in the reference lead This DC current will cause dissolution on th
18. iping 12 DL500 Dissolved Oxygen D O Probe User s Manual 5 02 4 Maintenance 4 1 Introduction The Honeywell D O probe requires no internal probe maintenance However like all other probes it does need to be cleaned periodically After a long period of use the oxygen transfer may cease due to a coating buildup This buildup may consume or block the oxygen increase the response time and or reduce the probe accuracy Cleaning the probe is easy and is normally accomplished by agitating the probe in a container of fluid The cleaning fluid can vary from water to a 10 HCI solution depending on the type of buildup or fouling encountered Inert Fouling ex hair grease and solids This type of fouling normally occurs in wastewater applications however rust like contaminants may occur in ppb applications When a significant amount of this debris is deposited on the probe the response time of the probe slows down Normal cleaning practices should restore probe to correct operation Biologically Active Slime 5 02 This type of fouling consists of biologically active slime adhering either loosely or tightly to the probe or the protective cap or both This slime can be visible or invisible and may produce a sticky feel to the probe and or cap s surface area This type of fouling is usually characterized by the following performance the signal drifts slowly downward for several hours or days and th
19. ly Now repeat Steps 2 6 until the flow can be changed from 100 ml min to 10 ml min with no change in the DO value DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Troubleshooting 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual 19 Sales and Service For application assistance current specifications pricing or name of the nearest Authorized Distributor contact one of the offices below ARGENTINA HONEYWELL S A I C BELGRANO 1156 BUENOS AIRES ARGENTINA Tel 54 1 383 9290 ASIA PACIFIC HONEYWELL ASIA PACIFIC Inc Room 3213 3225 Sun Kung Kai Centre 30 Harbour Road WANCHAI HONG KONG Tel 852 829 82 98 AUSTRALIA HONEYWELL LIMITED 5 Thomas Holt Drive North Ryde Sydney NSW AUSTRALIA 2113 Tel 61 2 353 7000 AUSTRIA HONEYWELL AUSTRIA G m b H Handelskai 388 A1020 VIENNA AUSTRIA Tel 43 1 727 800 BELGIUM HONEYWELL S A 3 Avenue de Bourget B 1140 BRUSSELS BELGIUM Tel 322 728 27 11 BRAZIL HONEYWELL DO BRAZIL AND CIA Rua Jose Alves Da Chunha Lima 172 BUTANTA 05360 050 SAO PAULO SP BRAZIL Tel 55 11 819 3755 BULGARIA HONEYWELL EOOD 14 Iskarsko Chausse POB 79 BG 1592 Sofia BULGARIA Tel 359 791512 794027 792198 CANADA HONEYWELL LIMITED THE HONEYWELL CENTRE 300 Yorkland Blvd NORTH YORK ONTARIO M2J 181 CANADA Tel 800 461 0013 Fax 416 502 5001 CZECH REPUBLIC HONEYWELL Spol s r o Budejovicka 1 140 21 Pr
20. mation for the Honeywell DL5000 Dissolved Oxygen D O Probe Contacts World Wide Web The following lists Honeywell s World Wide Web sites that will be of interest to our customers Honeywell Organization WWW Address URL Corporate http www honeywell com Industrial Process Control http Avww honeywell com ipc Telephone Contact us by telephone at the numbers listed below Organization Phone Number United States and Honeywell 1 800 423 9883 Tech Support Canada 1 888 423 9883 Q amp A Faxback TACFACS 1 800 525 7439 Service Symbol Definitions The following table lists any symbols used in this document to denote certain conditions Symbol Definition d Earth Ground Functional earth connection NOTE This connection shall be bonded to Protective earth at the source of supply in accordance with national and local electrical code requirements 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual iii 1 Contents INTRODUCTION 1 NERO 1 1 2 Probe DESCHNPUON aie eo ener cre Fo a cer HO Pa dese aa e aa qu Eee vii nds 1 1 3 Operating FNE NAL ask e 1 SPECIFICATIONS AND MODEL SELECTION GUIDE 2 2 gt DOSCIICATIONS ol wt ki ei ik a ai it ako E atis e teach fe ka a n e A 2 2 2 Model Selecti
21. on Guide eric te Rer pde kan kk ee Fk kk rn 3 TINS CAL LATION G sac 4 3 17 MOUNTING n a el a k a pk aie a tui oie tm avete ipea 4 DE424 425 Integral MOUNUNG s k k sekt yo eres tar E e vo kode e Pa pe A Fe aud 4 DL424 425 Remote Mounting ya beat nek ad Gine oke ea a ana bik ent on Ap eo eben dp ae 5 Series 7020 Remote Mounting and Wiring 7 Probe System Check overs ae ee da ee Ae Make ales o EL A LEA 8 System Check for Probe with Model 7020 ennenen 8 32 Probe MOUN UN OS parese depu ris e dw tende ya ee eta pi ro gas dert nde pa ee ch ede e ro 9 Wastewater SUDMENSIO N en ai ra oi e a ra bx el e ok ko apt a Deer a ra n an 9 In line Flow ERE Luxe EROR kn eed cea DA n be 10 Flow Through Mounting assistere 10 Mounting Recommendation for Easy Calibration in Boiler Control Loop 12 MAINTENANCE Ls 13 introduction eec 13 Inert FOULING 2 ane n ke po n n kak n tn ka A n R Ink dent Duke 13 Biologically Active Slime ose eere eer eer e CE RR pp Aa n ERE 13 227 VO CICA EI 14 4 30 O Ring Replacement EE 14 4 4 Probe Storage AA an WA EAM EE EM 14 Short LENIN a eec GE 14 Hense c EM 14 4 5 Packing Probe for Shipment or Storage
22. r manuals for adjusting the Probe Bias DL5000 Dissolved Oxygen D O Probe User s Manual 17 Troubleshooting 5 4 Leak Detection in PPB Applications Before performing and air leak detection it is necessary to determine that both the probe and analyzer are working properly First check to see that the probe contains an O ring Per the probe directions an O ring must go into a probe that is used in ppb applications This creates a tight seal between the probe and flow chamber MAKE SURE THIS O RING IS IN THE PROBE 1 2 3 18 Unless already in air open the probe to air for 30 seconds Put it back into the process again Allow the DO to drift down to the 20 30 ppb range The 20 30 ppb range was chosen because the reading was low enough that the drift was small with respect to the changes observed for various flow rates but high enough that changes could be observed At this range vary the flow rate from 10 to 100 ml min These low flow rates were selected for two reasons The first the tester many only have a 0 100 ml min flow indicator The other reason is a leak that exists at this low flow Will cause a change in the DO reading If the DO value at 10 ml min exceeds the DO value at 100 ml min a leak is present in the sampling line Fixing the leak may require plastic tubing to be replaced with metal tubing tape to be put on fittings and or fittings at the bottom of the probe to be tighten secure
23. rage Short term The Honeywell probe arrives from the factory with an red cap on the end of the probe This cap contains a 396 solution of Isopropyl alcohol and water The water keeps the probe wetted until it is put into the process The alcohol minimizes the growth of bacteria Long term If the probe remains on the shelf for longer than 6 months the solution inside the cap must be replaced To do this remove the side mounted threaded pipe plug using a 3 16 hex key wrench Fill the hole with a fresh solution of 396 Isopropyl alcohol and water and replace the hex screw This procedure keeps the probe wetted and minimizes incidence of bacteria 4 5 Packing Probe for Shipment or Storage 14 When removing the probe from service for storage or shipment replace the red cap that came with the probe Fill the probe as described in Storage Long term This prevents damage caused by long term contact with the other probe leads DL500 Dissolved Oxygen D O Probe User s Manual 5 02 5 Troubleshooting 5 1 Diagnostic Error Messages DL424 425 When a diagnostic error or status condition occurs the Online Display alternates between measured DO and a text message Troubleshooting Table 5 1 Online Diagnostic Errors What you see What it is What to do CnFG Configuration or Calibration data is Reset unit or cycle power defective Second occurrence will show FALt FALt Unit electronics are defec
24. ranty Against Manufacturing 1 Year Extended Warranty Defects Stainless Steel Customer 1 0 Tag 3 lines w 22 characters line 2 Years Extended Warranty 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual 3 Installation 3 Installation 3 1 Mounting and Wiring The following section describes the installation of the Honeywell probe DL424 425 Integral Mounting Table 3 1 Integral Mounting Procedure Figure 3 1 Step Procedure 1 Connect the probe to the process source using the appropriate mounting from those supplied for the DL5000 Make sure that the final position of the installed electronics module allows the display to be easily viewed by personnel 2 Apply a thin film of silicon grease on the ID of the electronics module s probe mounting cavity 3 Align the slots on the electronics module with those on the probe and press down to connect the electronics to the probe 4 Tighten the locking screw on the bottom rear of the electronics module Honeywell Electronics m 08 Module Locking Screw in Rear of Housing Probe Figure 3 1 Integral Mounting DL500 Dissolved Oxygen D O Probe User s Manual 5 02 Installation DL424 425 Remote Mounting When the DL424 DL425 module is specified with Table II 6 a remote connector assembly part number 51500768 005 is supplied loose The
25. remote cable connector is used to connect the DL5000 probe cable to the DL424 425 module Table 3 2 gives the mounting procedure Table 3 2 Remote Mounting and Wiring Procedure for DL5000 Probes 5 02 Step Procedure Refer to Figure 3 2 1 Turning counterclockwise remove strain relief cover combination from the remote connector assembly Remove the protective plastic bag from the end of the probe cable Be careful to keep bare fingers away from coax cable termination Loosen and remove compression cap from strain relief fitting Carefully push cable end through cap and strain relief fitting so that these parts are strung back along cable jacket Connect cable leads as follows See Figure 3 2 Terminal 1 Pigtail Shield Lead Black White Terminal 2 Temperature Compensation Lead Orange Terminal 3 Temperature Compensation Lead Yellow Terminal 4 Anode Red Terminal 5 Reference Green Terminal 6 Cathode Silver Pin Coax Earth Ground Blue Slide cover along cable and tighten by hand onto the remote connector assembly Slide cap along cable and tighten onto cable jacket with small wrench until cable cannot slide within strain relief rubber bushing Remove red protective vinyl boot from opposite end of connector assembly Apply a thin film of silicon grease to the ID of electronics module s remote mounting cavity Plug remote connector assembly into DL424 425 mo
26. tive Replace electronics module These errors may occur when on line DO Concentration or on line Temperature is displayed dOHI Measured DO is gt 20 ppm 200 ppb Bring process to within limits dOLo Measured DO is 0 00 ppm ppb Bring process to within limits PrbE Probe is defective wrong type or not Check for an electrical connected short between the anode t 3 Probe current is excessive with probe ane eee voltage near 0 volts Check the reference Forces the output to burnout level connechen greater than 22 mA When the source of the error is removed the error will clear and the output will return to normal operation THI Measured temperature is gt 60 Bring process to within limits T LO Measured temperature is 2 0 C Bring process to within limits 5 02 DL5000 Dissolved Oxygen D O Probe User s Manual 15 Troubleshooting What you see What it is What to do bErr Probe Bias Error Probe current has exceeded expected probe current by 3396 for at least 20 seconds If the excessive current condition continues after a manual probe bias the PrbE error is generated If excessive current is not present then the bErr remains Application related shift in probe bias voltage Remove the probe from process and do a probe bias calibration In ppm applications in processes containing the probe may be left in the process and the Bias can be manually adjusted
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