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Maintenance 

Model 6750 

 

 

Teledyne Analytical Instruments

 

54

 

 

5.3.4  D. C. Power Supply  

        The power supply  has no field adjustment.  If malfunctioning, 

replace the module (P/N ST15083) using the directions below. See 
Figure 5-6. 

Figure 5-6: DC Power Supply Module 

To replace the module: 

1.

 

Turn off power. 

2.

 

Remove plastic cover. 

3.

 

Disconnect connectors. 

4.

 

Remove nuts holding Power Supply. 

5.

 

Remove Power Supply Module. 

6.

 

Replace Power Supply Module. 

7.

 

Reverse steps for installation. 

8.

 

(Refer to Installation Drawings for proper connector 
assembly.) 

9.

 

Recalibrate liquid and span values. 

 

Summary of Contents for 6750

Page 1: ... Personal protective equipment may be required when servicing this instrument Hazardous voltages exist on certain components internally which may persist for a time even after the power is turned off and disconnected Only authorized personnel should conduct maintenance and or servicing Before conducting any maintenance or servicing consult with authorized supervisor manager P N M ECO ...

Page 2: ...r weight of any parts in so far as such alterations do not adversely affect our warranty Important Notice This instrument provides measurement readings to its user and serves as a tool by which valuable data can be gathered The information provided by the instrument may assist the user in eliminating potential hazards caused by his process however it is essential that all personnel involved in the...

Page 3: ...lytical Instruments iii Specific Model Information Instrument Serial Number _______________________ Instrument Range _______________ Calibrated for _______________ Background Gas _______________ Zero Gas _______________ Span Gas _______________ ...

Page 4: ...ury and or damage the instrument CAUTION HOT SURFACE WARNING This warning is specific to heated components within the instrument Failure to heed the warning could result in serious burns to skin and underlying tissue WARNING ELECTRICAL SHOCK HAZARD Dangerous voltages appear within this instrument This warning is specific to an electrical hazard existing at or nearby the component or procedure unde...

Page 5: ...manual and keep it available Occasionally some instruments are customized for a particular application or features and or options added per customer requests Please check the front of this manual for any additional information in the form of an Addendum which discusses specific information procedures cautions and warnings that may be peculiar to your instrument Manuals do get lost Additional manua...

Page 6: ... 3 The UV Heated Persulfate Method of Analysis 9 2 4 Subsystems Principles of Operation 11 2 4 1 Sample Handling 11 2 4 1 1 Liquid Phase Sample Handling 11 2 4 2 2 Gas Phase Sample Handling 13 2 4 2 Inorganic Carbon Removal Analysis 14 2 4 3 Oxidation 15 2 4 4 NDIR CO2 Gas Detection 17 2 4 5 Electronic Signal Processing Display and Control 18 2 4 5 1 Benchmark Auto Validation 19 2 4 5 2 Auto Calib...

Page 7: ...yzer Startup 29 4 2 Menus 31 4 2 1 Run Mode 31 4 2 2 Parameter Menu 32 4 2 3 Alarm Settings 33 4 2 4 Stream Sequencer 34 4 2 5 D DBPR 35 4 3 Detailed Calibration Procedures 36 4 4 Operation 40 4 5 Shutdown 41 4 6 Historical Data 41 Maintenance 43 5 1 Compupter aided Testing 43 5 2 Troubleshooting 44 5 3 Module Service 45 5 3 1 NDIR Gas Calibration 45 5 3 2 NDIR Service 47 5 3 3 Master Interface Bo...

Page 8: ... 2 Pump Head Tubing Replacement 65 5 3 13 4 20 mA Adjustment Procedure 67 5 3 13 1 Setting 100 mV Control Voltage 68 5 3 13 2 Setting of 4 20 mA output 68 Appendix 69 A 1Specifications 69 A 2 Parts Listing 71 A 3 Options 76 A 3 1 Option 200008 76 A 3 2 Option 200009 76 A 3 3 Option 200010 76 A 3 4 Option 200016 77 A 3 5 Option 200017 77 A 3 6 Option 200009 77 A 3 7 Option 400008 77 A 3 8 Option 20...

Page 9: ...5 Figure 2 9 Oxidation Reactions 16 Figure 2 10 Model 6750 NDIR Unit 17 Figure 3 1 Analyzer Dimensions 22 Figure 3 2 Required Door Clearance 22 Figure 3 3 Internal Components of the Model 6750 Analyzer 23 Figure 3 4 Electrical Connections to the Model 6750 24 Figure 3 5 Gas and Liquid Connections to the Analyzer 26 Figure4 1 Drain Connections 30 Figure 4 2 Gas Liquid Separator D I Filling 31 Figur...

Page 10: ...CE Computer 55 Figure 5 8 UV Lamp Replacement 56 Figure 5 9 Removing the UV Reactor Assembly 57 Figure 5 10 Removing the UV Power Supply 59 Figure 5 11 Mass Flow Controller 60 Figure 5 12 Metering Valve 61 Figure 5 13 Sparger 62 Figure 5 14 Removing the Pump 65 Figure 5 15 Pump Head Tubing Replacement 67 ...

Page 11: ...Total Organic Carbon Analyzer Teledyne Analytical Instruments xi List of Tables Table 4 1 Preparation of Standards TOC TIC 37 Table 5 1 Troubleshooting 44 ...

Page 12: ...stomer should ensure that the principles of operating this equipment are well understood by the user Misuse of this product in any manner tampering with its components or unauthorized substitution of any component may adversely affect the safety of this instrument Since the use of this instrument is beyond the control of Teledyne Instruments Analytical Instruments referred as TI AI no responsibili...

Page 13: ... parts and use a corrosion resistant design to further reduce maintenance tasks Operating the analyzer is easy It uses a standard industrial Windows CE computer programmed for complete automatic control there are no operator manual adjustments Operators are advised to study pertinent chapters in this manual to fully utilize the capabilities of the analyzer and avoid problems that could be associat...

Page 14: ...lications With excellent TOC accuracy from low parts per million to high concentration levels of salt free samples the Model 6750 is used in a variety of applications including Boiler Feedwater Standard Method 5310 C D Cooling Water EPA 415 1 Drinking Water EPA 9060 Wastewater limited ASTM D 4839 88 River Water ASTM D 4779 88 Oil in Water 1 4 Intended Use of the Analyzer The Analyzer is exclusivel...

Page 15: ...f the product 1 5 Operator Interface The Model 6750 Analyzer is housed in a rugged metal case and may be wall or rack mounted for operator convenience The enclosure is equipped with a viewing window on the front panel and all operator serviceable components may be viewed through the cabinet window including the display Figure 1 1 The Model 6750 TOC Analyzer Front door removed All operations are au...

Page 16: ...Introduction Model 6750 Teledyne Analytical Instruments 4 ...

Page 17: ...here are some discrepancies or misunderstanding in just what TOC is comprised of Many manufacturers claim TOC analysis capability without disclosing the limitations of their methods Some treat all TOC analyzers as a commodity with no distinguishing characteristics among them Analytical results reported by the user can therefore be questionable unless the TOC method is matched to the analytical req...

Page 18: ...ng its pH to approximately 2 0 at which point the carbonates present in the sample are converted to dissolved CO2 In the sparger the carrier gas strips sparges the CO2 converted from the TIC and vents it along with any purgeable volatile organics leaving only NPOC in the sample The resultant NPOC is then oxidized to CO2 in the reactor and measured by the CO2 detector as NPOC in the sample often re...

Page 19: ...s performed as a TOC True method TOC True TC TIC The difference between the Model 6750 s TOC True Method and other simple TC TIC subtraction methods is that most other simple TC TIC subtraction methods only deal with a TC measurement then a separate TIC measurement and a simple mathematical difference to derive a TOC analysis In the TOC True method used by the Model 6750 the analyzer actually perf...

Page 20: ...Theory of Operation Model 6750 Teledyne Analytical Instruments 8 Figure 2 3 TOC Measurement Basics Figure 2 4 UV Persulfate Method ...

Page 21: ... NPOC analysis NDIR analysis of CO2 is specific and interference free and is used in all critical and regulatory applications The TOC Direct method is the most accurate TOC analytical method as determined by the EPA and other governmental agencies Teledyne also offers conductivity detection but it is of limited use in these applications and is not proposed as a primary detection method for TOC ana...

Page 22: ...Theory of Operation Model 6750 Teledyne Analytical Instruments 10 Figure 2 5 Comparison of TOC Measurement Technologies ...

Page 23: ... by the air O2 carrier gas At this point any volatile organic carbon is also sparged out and lost for inclusion in the TOC analysis unless a TOC True analysis is performed as described below 2 4 1 Sample Handling The sample is processed through the analyzer in two phases liquid and gaseous 2 4 1 1 LIQUID PHASE SAMPLE HANDLING Referencing Figures 2 6 and 2 7 the sample is introduced to the analyzer...

Page 24: ...continuously introduces the carbonate free sample to the reactor No valves or complicated injection mechanisms are required The remaining organic carbon is oxidized to CO2 in the reactor The resultant gaseous stream is directed to a gas liquid separator and then to the NDIR The CO2 gas is analyzed by the infrared analyzer NDIR as a direct correlation of Total Organic Carbon TOC A computer controls...

Page 25: ...analysis than is actually present in the sample An Oxygen Generator P N ST200025 is available from Teledyne that separates oxygen from the ambient air It is a pressure swing absorption PSA device requiring only electricity only to operate Also available from Teledyne is an Instrument Air Purifier P N ST200019 This device can supply the oxygen demands of the instrument using facility instrument air...

Page 26: ...nate the potential interference from inorganic carbon in TOC analysis The carrier gas directs the CO2 and other products of oxidation from the reactor to the Gas Liquid Separator GLS where liquid waste is directed to drain and gases containing CO2 and other gaseous products of oxidation are directed to the CO2 specific NDIR The CO2 concentration is directly related to sample TOC concentration and ...

Page 27: ...e normalcy of the acid reagent until the water exiting the sparger drain is between 2 0 and 3 0 Figure 2 8 Relationship Between TIC and pH 2 4 3 Oxidation The UV reactor and persulfate reagent provide oxidation of the carbon to CO2 The UV reactor consists of the following Mounting enclosure with viewing window Borosilicate reactor body Heater Temperature sensor UV Lamp Miscellaneous fittings and c...

Page 28: ...persulfate reagent P N ST40000 and precisely controlling the carrier gas flow rate Pump P 1 continuously meters a precise amount of carbonate free sample from the sparger to the UV reactor Pump P 3 continuously meters a precise amount of persulfate reagent to the reactor Mass Flow Controller MFC 1 precisely controls the carrier flow rate Refer to Figures 2 6 and 2 7 Figure 5 10 shows UV oxidation ...

Page 29: ... further reduces the maintenance load and it uses an internal self calibrating technique The NDIR unit is shown in Figure 2 10 Some of the features of the NDIR unit are as follows Specific interference free CO2 detection Dual wavelength rationing compensates for drift Computer controlled for accuracy Sapphire protected optics Non corrosive non reflective sample cell borosilicate No moving parts or...

Page 30: ... an alarm providing fail safe operation Signal detection is completely synchronous and because of the differential ratioing technique drift is virtually eliminated All critical optics are protected by sapphire windows The NDIR optical bench can be easily disassembled and windows cleaned rarely ever required and reassembled within fifteen 15 minutes without realignment or the use of any tools The b...

Page 31: ...or designated day and time activation on a repetitive basis On command manual or automatic by selection of day time the combination of valves V3 and V4 divert the sample and introduce a liquid calibration solution to the analyzer This is the same calibration solution used to previously calibrate the analyzer end to end If the TOC value from the calibration solution falls within a limit generally s...

Page 32: ...Theory of Operation Model 6750 Teledyne Analytical Instruments 20 ...

Page 33: ...ions 5 Testing the System 3 1 Unpacking the Analyzer The analyzer is shipped with all the materials you need to install and prepare the system for operation Carefully unpack the analyzer and inspect it for damage Immediately report any damage to the shipping agent 3 2 Mounting the Analyzer The analyzer is for indoor use in a general purpose area The Hazardous Area Option should be used for applica...

Page 34: ...Installation Model 6750 Teledyne Analytical Instruments 22 Figure 3 1 Analyzer Dimensions Figure 3 2 Required Door Clearance ...

Page 35: ...ions Figure 3 4 shows the analyzer electrical electronics connections for power communication and both digital and analog concentration outputs See also the AS BUILT drawing package included in the Appendix 3 3 1 Power Connection The universal power supply requires an 85 250 VAC 47 63 Hz power source For safe connections ensure that no uninsulated wire extends outside the connectors they are attac...

Page 36: ...ILITY MUST HAVE AN EXTERNAL POWER SWITCH TO REMOVE PRIMARY POWER FROM THE ANALYZER Analog Output Connections Alarm Connections Figure 3 4 shows where the electrical connections are made to the instrument 3 3 2 Analog Outputs There are two analog output signal connections There are two wires per output with the polarity noted See As Built Drawings in the Appendix The outputs are non isolated 4 20 m...

Page 37: ...pendix The connections are Threshold Alarms Can be configured as high actuates when concentration is above setpoint or low actuates when concentration is below threshold Can be configured as failsafe or non failsafe Can be configured as latching or non latching Malfunction Alarm 3 3 4 RS 232 Serial Connection An RS 232 port is provided for serial communication MODBUS Connect a standard RS 232 cabl...

Page 38: ...ines as per Figure 3 4 and the AS BUILT drawings in the Appendix Make sure there are no restrictions or kinks in the sample lines Figure 3 5 Gas and Liquid Connections to the Analyzer 3 4 2 Gas Connections The gas connections include Sample Gas Carrier Gas Vent Calibration Gases zero and span ...

Page 39: ...ections must be consistent with the hazard level of the constituent gases Check Local State and Federal laws and ensure that the exhaust stream vents to an appropriately controlled area if required CAUTION OPERATING THE UNIT WITHOUT CARRIER GAS CAN DAMAGE THE ANALYZER 3 5 Checking the System Before applying power to the instrument check All gas and liquid lines as well as vent and drains are prope...

Page 40: ...Installation Model 6750 Teledyne Analytical Instruments 28 ...

Page 41: ...ction and AS BUILT Drawings in the Appendix check the following 1 Air oxygen supply This must provide a constant pressure of 15 2 0 psi ultra pure oxygen or CO2 free air at a flow rate up to 500 cc minute Pre purified air may be used with optional Air Purifier P N ST910003 2 Drain Line Check to see if the drain line is free of kinks and loops and allows normal vented gravity flow to an open recept...

Page 42: ...I water as indicated in Figure 4 2 6 After all of the above checks turn analyzer ON by activating the facility power switch The system starts up in Run Mode 7 Immerse line from sample port of the analyzer into D I water container 8 Immerse persulfate line from the persulfate port of the analyzer into persulfate container 9 Immerse acid line from the ACID IN port of the analyzer into ACID container...

Page 43: ...imple and easy to use Menus prompt the user for required actions or input The analyzer has no manual adjustments All calibrations and operations are computer controlled by the operator following menu prompting and selection of the operation of choice The following menu and operation descriptions are intended to guide the operator through all the functions of the analyzer After primary power 110 22...

Page 44: ...ugh your analyzer has been optimally configured for your application on initial startup the setup parameters should be verified Consult Factory Settings for Your Application As Built Drawings in the Appendix To get to the Parameters menu 1 From the Run Screen select EDIT The following menu will appear Note Options not included in your analyzer will have no response if selected ...

Page 45: ... the following settings are correct or select the desired settings Consult As Built Drawings in the Appendix and Factory Settings Chart Page V Carrier Flow Rate Liquid Range Note The Liquid Range setting is that value to which the full scale output range is to be set not the value of the Liquid Span 4 2 3 Alarm Settings The next settings to verify or set are the Alarm Settings To adjust the alarm ...

Page 46: ...lect Sequencer The following menu appears From this menu you can Configure the duration of analysis for each stream how long it will analyze that stream before selecting the next stream Configure the changeover time to allow the prior stream to pass through sampling systems and clear the analyzer before analysis of the next steam begins Enable and disable each stream analysis for example to concen...

Page 47: ...s 35 4 2 5 D DBPR This optional utility allows convenient external pH calibration and input of alkalinity data consistent with the D DBPR requirements If your analyzer has been configured for the D DBPR option from the following Edit Menu select D DBPR The following screen appears ...

Page 48: ...calibration is performed by an end to end method whereby a known organic carbon chemical standard solution is introduced to the analyzer and the analyzer is spanned to that value 3 Organic and Inorganic Carbon Standards a Potassium Hydrogen Phthalate is recommended for the organic carbon standard solution b Sodium Carbonate is recommended for the inorganic carbon standard c Table 4 1 provides the ...

Page 49: ...L H20 5 00 gm L H20 Acetic Acid 250 gm L H20 2 50 gm L H20 KHP Potassium acid phthalate 212 gm L H20 2 12 gm L H20 Glycine 313 gm L H20 3 13 gm L H20 Sodium Stearate 141 gm L H20 1 41 gm L H20 Succinic Acid 246 gm L H20 2 46 gm L H20 Sodium Oxalate 555 gm L H20 5 55 gm L H20 INORGANIC COMPOUNDS 50 mg Liter TIC AS CARBON Sodium Carbonate 442 gm L H20 Potassium Carbonate 575 gm L H20 Ammonium Carbon...

Page 50: ...ution It should be noted that some reagent grade sodium persulfate is not really pure All persulfate supplied by Teledyne is guaranteed to have sufficient purity for proper operation 5 Acid Preparation Phosphoric Acid is the acid of choice PREPARATION OF PHOSPHORIC ACID SOLUTION a The container used should be flushed with distilled or deionized DI water b Add 117ml of 85 phosphoric acid to one 1 l...

Page 51: ...e following screen appears c Flow ZERO D I Water and allow NDIR reading to stabilize For maximum accuracy especially at lower ranges this process may take 20 minutes When reading is stable select ZERO d Flow Liquid Span Standard Solution Allow NDIR reading to stabilize approximately 15 minutes e Select SPAN It is recommended that the operator continue to observe the reading and if not stabilized a...

Page 52: ... specific operational procedures please refer to the INSTALLATION and AS BUILT drawings in the Appendix or any Addenda that accompanies this manual If applicable the Appendix or Addenda will include details on your specific application which may involve valving stream sequencing automatic calibration etc The RUN screen will automatically appear on the screen It will also appear whenever the comput...

Page 53: ...gent lines for at least 30 minutes to clean all tubing CAUTION FAILURE TO OBSERVE ADEQUATE FLUSHING COULD RESULT IN HARMFUL ACID BURNS AND OR A REACTOR CLOG 4 6 Historical Data Previous data may be obtained by selecting CHART from the screen The following menu will appear The display scale can be adjusted using the Select TOC SCALE item from the CHART menu The following screen will appear Edit Sca...

Page 54: ...HOURS The following screen will appear Using the Scroll Bar select the data to be viewed Selecting HISTORICAL DATA allows you to view any archived data within the memory limits of the computer A screen appears which will allow you to select the archived time period desired How far back you can go depends on the available memory ...

Page 55: ...ntenance 5 1 Compupter aided Testing Prior to performing detailed troubleshooting procedures listed below first perform computer aided testing of the analyzer as follows 1 From the screen select TEST The following menu appears 2 Select SYSTEM DIAGNOSTICS The following menu appears ...

Page 56: ...ply Check power supply fuse Analyzer does not Calibrate is sluggish Look for correct any liquid or gas line leaks Analyzer is excessively noisy Check for leaks at tubing connections Display not functioning Check cable connections Check power supply voltage Suspect Malfunctioning Computer P N ST13039 Master Control Panel Assembly P N ST13042 1 Pump head not rotating Refer to section Pumps 12 3 12 V...

Page 57: ...alibration 1 From the Menu select CALIBRATE The following screen will appear 2 Select INFRARED ANALYZER The following Screen will appear 3 Disconnect tubing from reactor output and connect IR calibration adapter P N ST20026 as shown in Figures 5 1 5 2 and 5 3 4 Connect facility tubing to Zero and Span Gas Bottles ...

Page 58: ...Maintenance Model 6750 Teledyne Analytical Instruments 46 Figure 5 1 Disconnecting Tubing from Reactor Figure 5 2 IR Calibration Adapter P N ST20026 IR Calibration ...

Page 59: ... of 1 CO2 in pure nitrogen For the longer 15 inch bench a gas mixture of 0 1 CO2 in pure nitrogen is required for Flow 200 cc minute of this cal gas for at least three minutes Allow NDIR reading to stabilize and then select SPAN NDIR reading is set to 10 000 Select OK to save or CANCEL to reject the calibration setting The NDIR unit has now been properly calibrated Reconnect the fitting to reactor...

Page 60: ...ents 48 Figure 5 4 Removing the NDIR Unit P N ST36000 To Replace the NDIR Unit 1 Turn off power 2 Remove inlet tube from NDIR Assembly 3 Remove vent tube from NDIR Assembly 4 Unplug interface cable from NDIR Assembly 5 Remove NDIR Assembly from cabinet ...

Page 61: ...Total Organic Carbon Analyzer Maintenance Teledyne Analytical Instruments 49 Remove insulation from IR Cell Remove lock tight from three thumbnuts and remove Slide out and remove Source Assembly ...

Page 62: ...Maintenance Model 6750 Teledyne Analytical Instruments 50 Remove IR Cell Assembly Note a O Rings in each of Detector Assembly left and Source Assembly right b Sapphire windows located under O Rings ...

Page 63: ... and Sapphire window taking care to avoid scratching Sapphire window Recommend using toothpick Clean sapphire windows with a soft lintless tissue use DI water if necessary To Reassemble Install IR Cell Install Source Assembly end piece Note Large outlet port goes into Detector Assembly left ...

Page 64: ...sembly bottoms out on squeeze nuts Recommend Use alternate tightening sequence Insert lock tight on three thumbnuts to prevent backoff Install insulation Replace assembly as before Recalibrate NDIR Section 4 3 Note IR Cell installed incorrectly Large outlet port MUST go into Detector Assembly left ...

Page 65: ...as no field adjustment If malfunctioning replace the module P N ST13042 1 using the instructions below See Figure 5 5 Figure 5 5 Removing the Master Interface Board To Remove the PC Board 1 Turn off power 2 Remove plastic cover 3 Disconnect connectors 4 Remove panel Note Depending on the configuration there may be one or two master interface boards ...

Page 66: ...e directions below See Figure 5 6 Figure 5 6 DC Power Supply Module To replace the module 1 Turn off power 2 Remove plastic cover 3 Disconnect connectors 4 Remove nuts holding Power Supply 5 Remove Power Supply Module 6 Replace Power Supply Module 7 Reverse steps for installation 8 Refer to Installation Drawings for proper connector assembly 9 Recalibrate liquid and span values ...

Page 67: ... Replacing CE Computer To Replace the CE Computer 1 Turn off power 2 Disconnect electrical connectors 3 Remove screws holding Module in place 4 Remove module 5 Install new CE Computer in reverse disassembly instruction procedure steps Install electrical connectors per supplied drawing 6 Verify proper software install per directions shipped with new CE Computer 7 Recalibrate liquid zero and span va...

Page 68: ...ure 5 8 UV Lamp Replacement To replace the UV lamp 1 Turn off the UV lamp at the UV power supply Remove persulfate and acid reagent lines from containers as well as the sample inlet line and submerse all three 3 lines into D I water to completely flush system CAUTION FAILURE TO DO SO MAY RESULT IN ACID BURNS CLOGGED REACTOR FLUSH FOR 30 MINUTES CAUTION USE ONLY P N ST20009 UV LAMP TO ASSURE PROPER...

Page 69: ...ool down 3 Disconnect electrical connectors 4 Loosen fittings as illustrated 5 Remove UV Lamp 6 Recalibrate analyzer 5 3 7 UV Reactor Assembly P N ST20003 1 If malfunctioning clean the assembly If still malfunctioning replace the assembly P N ST20003 1 See Figure 5 9 Figure 5 9 Removing the UV Reactor Assembly To Replace the UV Reactor Assembly 1 Turn off UV Lamp at the UV Power Supply Remove Pers...

Page 70: ...ter through all tubing until clean 2 Replace assembly as before 3 Charge reactor with D I water 4 Recalibrate analyzer 5 3 8 UV Power Supply The UV Power Supply P N ST15002 for 110 VAC or P N ST15000 for 220VAC is normally checked with another good UV lamp If it activates the UV lamp the UV Power Supply is good If the Power Supply is not good replace the Module P N ST15002 for 110 VAC or P N ST150...

Page 71: ...If supply flow exists fault may be in the tubing Disconnect output side of mass flow controller and check for flow If no flow exists exchange mass flow controller as described below See Figure 5 11 If flow still does not exist check rest of tubing for restrictions leaks etc To remove the mass flow controller 1 Shut off Power to Instruments 2 Shut off all gas to analyzer and bleed system for O pres...

Page 72: ...valve be careful to return to previous indicated bubble rate If flow cannot be restored replace the metering valve P N ST16050 according to the directions below See Figure 5 12 To replace the metering valve 1 Turn carrier gas Air O2 OFF 2 Turn pumps OFF 3 Remove fittings and tubing 4 Remove metering valve 5 Recalibrate TIC if TIC and or TOC TRUE analysis is required NPOC analysis only does not req...

Page 73: ... cracked glass etc or is clogged beyond cleaning replace sparger P N ST20025 according to the directions below See Figure5 13 To replace the sparger CAUTION CONTACT WITH ACID LIQUID OR VAPOR CAN DAMAGE TISSUE CAUSE EYE DAMAGE RESULT IN SEVERE BURNS AND CAUSE LUNG AND RESPIRATORY DAMAGE WEAR PROPER PROTECTIVE CLOTHING AND SAFETY GLASSES WITH SPLASH SHIELDS TREAT ALL ACIDS WITH CAUTION AND HANDLE WI...

Page 74: ...rn machine OFF 2 Turn carrier gas Air O2 OFF 3 Remove and drain tubing and sparger 4 Remove sparger from spring clips To clean the sparger 1 Run warm water through tubing to flush out any solid contamination 2 Reinstall sparger in reverse order Figure 5 13 Sparger ...

Page 75: ... g open windings etc replace motor For 110 V 2 RPM motor use P N ST18002 for 220 V 2 RPM motor use P N ST18003 For pump motor replacement refer to Section 5 3 12 1 and Figure 5 14 If the motor is operating properly worn tubing is the probable cause for poor or non existent pumping Retube pump heads as described in Section 5 3 12 2 and Figure 5 15 5 3 12 1 PUMP MOTOR REPLACEMENT Note Masterflex pum...

Page 76: ...ntenance Model 6750 Teledyne Analytical Instruments 64 3 Remove pump as illustrated to gain access to pump mounting screws 4 Remove two thumbscrews for pump panel removal 5 Disconnect Pump Motor Connector ...

Page 77: ... and reassemble in reverse step sequence Figure 5 14 Removing the Pump Note Actual mounting panel may appear somewhat different but mounting hardware is the same 5 3 12 2 PUMP HEAD TUBING REPLACEMENT 1 Separate the end bells the pump head halves 2 Hold the end bell containing the rotor as shown with the tubing retainer grooves pointing down ...

Page 78: ...d tubing with thumb 5 Near groove insert smaller prong of loading key between the top of the rotor and tubing 6 Push key in as far as possible 7 Push down and turn key counterclockwise ccw completely around the rotor 8 The key will push the tubing uniformly into the end bell assembly 9 Hold the second end of tubing 10 Remove the key ...

Page 79: ... With key in slot on rotor shaft turn key to align tang on rotor shaft with slot in motor drive shaft 16 Point tubing retainer grooves up 17 Shift the pump head slightly until it snaps on the alignment pins if present 18 Secure with four provided screws 19 Tighten with fingers only Figure 5 15 Pump Head Tubing Replacement 5 3 13 4 20 mA Adjustment Procedure 1 Select TEST from the Run Screen task b...

Page 80: ...er than 3 mV 2 Next position the Analog A cursor to Max position Note the mV reading from the top of R19 Use pot R21 located slightly to the right of the center of the circuit board to adjust the mV reading 100 mV higher than minimum reading Reposition Analog A to Min and re check Min and Max mV readings 5 3 13 2 SETTING OF 4 20 MA OUTPUT 1 Using a digital voltmeter connected to read mA connect th...

Page 81: ...ull scale std Note Range changes often require carrier gas adjustments The Model 6750 uses the precision of computer controlled mass flow controllers to eliminate operator error and the use of inaccurate mechanical flow meters Display Windows with Paperless Chart Recorder 2 Line LCD Data Handling RS 232C RS 485 Analog Output 4 20mA Alarms Two concentration alarms One master fault alarm Performance...

Page 82: ...crons max Reagents TOC Mode Sodium Persulfate 4 0 gal month Phosphoric Acid 10 v v 4 0 gal month nom Calibration One point span Chemical standard computer stored multiple calibration curves Facility requirements Power 115 10 VAC 50 60 Hz 7A Service Recommended 220 10 VAC 50 60 Hz optional 4 A Service Recommended Air Clean dry oil free CO2 free instrument air at 15 psi 2 psi consumption 500 cc minu...

Page 83: ...004 ST16005 ST16006 7013 Pump Head 7014 Pump Head 7015 Pump Head 7016 Pump Head 7017 Pump Head 7018 Pump Head ST18002 1 2 RPM 110V ST18003 1 2 RPM 220V Pump Motor Assembly ST16007 ST16008 ST16009 ST16010 ST16011 ST16012 13 Tygon Tubing 14 Tygon Tubing 15 Tygon Tubing 16 Tygon Tubing 17 Tygon Tubing 18 Tygon Tubing ST18001A Mass Flow Controller ...

Page 84: ...50 Teledyne Analytical Instruments 72 Part Description Image ST15083 12V DC Power Supply ST13069 1 Distribution Board ST13070 1 Interface Board ST13039 CE Computer ST100001 6 6 NDIR Assembly ST100001 15 15 NDIR Assembly ...

Page 85: ...e Analytical Instruments 73 Part Description Image ST100006 1 NDIR Detector Assembly ST100009 6 6 NDIR Cell Assembly ST100009 15 15 NDIR Cell Assembly ST100008 1 NDIR Source Assembly ST17007 ST20001 NDIR O Ring NDIR Sapphire Window ST20025 Sparger ...

Page 86: ...Appendix Model 6750 Teledyne Analytical Instruments 74 Part Description Image ST16050 Metering Value ST200026 IR Calibration Adapter ST20009 UV Process Lamp ST13066 1 AC Board Assembly ...

Page 87: ...anic Carbon Analyzer Appendix Teledyne Analytical Instruments 75 Part Description Image ST200003 1 UV Reactor Assembly ST15000 110V ST15002 220V UV Power Supply ST18050 Flow Switch ST20024T Gas Liquid Separator ...

Page 88: ...equipped with BENCHMARK the time for the subsequent auto cal if required is significantly reduced as the BENCHMARK standard would become the SPAN solution and the computer controlled analyzer reset to a fully calibrated condition This feature may be scheduled to be performed automatically by the operator All valving is included A 3 2 Option 200009 AUTO CAL AUTO CAL is a feature to automatically 2 ...

Page 89: ...H input A 3 8 Option 200026 COD BOD CORRELATIONS Both COD and BOD readouts are correlated to instantaneous TOC analyses Thus the operator is provided with useful predictive real time analogs derived from the actual organics in the sample While TOC provides the most specific measurement for process control for organic loading treatment spill detection etc COD and BOD continue to provide useful data...

Page 90: ...ions for those conditions would be used at those times After obtaining a representative amount of TOC COD BOD data the operator enters those factors into the analyzer computer Thereafter all three parameters TOC COD BOD are continuously displayed Updates to these correlations may be made at any time Consult the factory for particular user applications ...

Page 91: ...Total Organic Carbon Analyzer Appendix Teledyne Analytical Instruments 79 A 4 AS BUILT Drawings ...

Page 92: ...Appendix Model 6750 Teledyne Analytical Instruments 80 ...

Page 93: ...CALIBRATE 39 45 calibration 36 70 calibration solution 19 calibration standard 19 carbonate 6 carrier gas 6 9 11 13 27 carrier gas connection 27 carrier gas flow rate 14 16 32 33 caution sign iv CE computer 55 changeover time 34 CHART 41 chart recorder 1 12 18 CO2 detection 17 CO2 detector 6 7 9 COD BOD 77 combustible gas warning xii communication 23 computer 1 3 12 18 computer control 17 31 compu...

Page 94: ... liquid connections 25 liquid range 33 liquid sample 11 liquid waste 14 maintenance 43 Maintenance Request 19 manuals additional v mass flow controller 13 14 59 master control panel assembly 44 master fault alarm See alarm master fault master interface board 53 MAX 67 memory 32 metering valve 60 Microsoft Windows 18 MIN 67 MODBUS 25 mounting hole 21 multi stream analysis 2 multi stream sequencer 3...

Page 95: ...on 25 serial number iii setup 29 shutdown 41 signal detection 18 signal processing 11 sodium carbonate 36 sodium persulfate 37 SPAN 39 47 span fluid 39 span solution 19 sparger 6 9 11 14 16 61 sparger cleaning 62 sparger flow rate 14 sparger replacement 62 specifications 69 stability 69 standard solution 36 subsystem 11 suspended solids 70 synchronous 18 system checklist 27 SYSTEM DIAGNOSTICS 43 6...

Page 96: ...alve 19 view window 3 VOC 5 7 volatile hydrocarbon 11 volatile organic carbon See VOC volatile organic loss 9 14 volatile organics 1 voltmeter 68 wall mounting 21 warning sign iv warranty ii water vapor interference 18 website address v Windows CE computer 1 worn tubing 63 ZERO 39 47 zero fluid 19 39 ...

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