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Trace Oxygen Analyzer

Operational Theory

Teledyne Analytical Instruments

11

directly proportional to the concentration of oxygen in the gaseous
mixture. In other words it has a linear characteristic curve, as shown in
Figure 2-3. Measuring circuits do not have to compensate for
nonlinearities.

In addition, since there is zero output in the absence of oxygen, the

characteristic curve has close to an absolute zero (less than ± 0.2 ppm
oxygen). Depending upon the application, zeroing may still be used to
compensate for the combined zero offsets of the cell and the electronics.

Figure 2-3: Characteristic Input/Output Curve for a Micro-Fuel Cell

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Содержание 3000TA-XL-EU

Страница 1: ...system 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 turne...

Страница 2: ...ht 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 dat...

Страница 3: ...Trace Oxygen Analyzer Teledyne Analytical Instruments iii...

Страница 4: ...y a check mark in the box Instrument Serial Number _______________________ Options Included in the Instrument with the Above Serial Number 3000TA XL VS Instrument configured for Vacuum Service 3000TA...

Страница 5: ...ymbols are used throughout the Instruction Manual These symbols are visual indicators of important and immediate warnings and when you must exercise CAUTION while operating the instrument See also the...

Страница 6: ...dures which if not followed could cause bodily Injury and or damage the instrument CAUTION HOT SURFACE WARNING This warning is specific to heated components within the instrument Failure to heed the w...

Страница 7: ...of your new analyzer Please read this manual and keep it available Occasionally some instruments are customized for a particular application or features and or options added per customer requests Ple...

Страница 8: ...he customer should ensure that the principles of operation of this equipment are well understood by the user Misuse of this product in any manner tampering with its components or unauthorized substitu...

Страница 9: ...ntroduction 7 2 2 Micro Fuel Sensor 7 2 2 1 Principles of Operation 7 2 2 2 Anatomy of a Micro Fuel Cell 8 2 2 3 Electrochemical Reactions 9 2 2 4 The Effect of Pressure 10 2 2 5 Calibration Character...

Страница 10: ...race Micro fuel Cell 32 3 5 Testing the System 34 Operation 37 4 1 Introduction 37 4 2 Using the Data Entry and Function Buttons 38 4 3 The System Function 40 4 3 1 Tracking the Oxygen Readings During...

Страница 11: ...0 The IP Address Function 61 Web Implementation 63 5 1 The Embedded Browser 63 5 2 Remote Calibration 65 5 2 1 Remote Span 65 5 2 2 Remote Zero 67 5 3 Set the Alarms Remotely 68 5 4 Set the Ranges Rem...

Страница 12: ...ments xii 6 6 Cleaning 81 6 7 Troubleshooting 81 Appendix 83 A 1 Specifications 83 A 2 Recommended 2 Year Spare Parts List 85 A 3 Drawing List 86 A 4 19 inch Relay Rack Panel Mount 86 A 5 Application...

Страница 13: ...0TA XL CV 14 Figure 2 6 Power supply and PCB Location 15 Figure 2 7 Block Diagram of the Model 3000TA XL EU Electronics 16 Figure 3 1 Front Panel of the Model 3000TA XL EU 20 Figure 3 2 Required Front...

Страница 14: ...6 System Window 70 Figure 5 7 Self Test Window 71 Figure 6 1 Removing the Micro Fuel 76 Figure 6 2 Installing the Insta Trace Cell 77 Figure 6 3 Removing Fuse Block from Housing 78 Figure 6 4 Installi...

Страница 15: ...ns 24 Table 3 2 Alarm Relay Contact Pins 25 Table 3 3 Remote Calibration Connections 26 Table 3 4 Range ID Relay Connections 28 Table 3 5 Commands via RS 232 Input 30 Table 3 6 Required RS 232 Options...

Страница 16: ......

Страница 17: ...typical applications of the Model 3000TA XL EU are Monitoring inert gas blanketing Air separation and liquefaction Chemical reaction monitoring Semiconductor manufacturing Petrochemical process contro...

Страница 18: ...he proper preset range for a given measurement Manual override allows the user to lock onto a specific range of interest Two adjustable concentration alarms and a system failure alarm Extensive self d...

Страница 19: ...meric display and a window for viewing the sample flowmeter Figure 1 1 Model 3000TA XL EU Front Panel Function Keys Six touch sensitive membrane switches are used to change the specific function perfo...

Страница 20: ...25 It is accurate across all analysis ranges without the discontinuity inherent in analog range switching Alphanumeric Interface Screen The VFD screen is an easy to use interface from operator to ana...

Страница 21: ...puts 0 1 VDC oxygen concentration plus 0 1 VDC range ID and isolated 4 20 mA DC oxygen concentration plus 4 20 mA DC range ID Alarm Connections 2 concentration alarms and 1 system alarm RS 232 Port Se...

Страница 22: ...ote If you require highly accurate Auto Cal timing use external Auto Cal control where possible The internal clock in the Model 3000TA XL is accurate to 2 3 Accordingly internally scheduled calibratio...

Страница 23: ...ing input output and display functions for the analyzer 2 2 Micro Fuel Sensor 2 2 1 Principles of Operation The oxygen sensor used in the Model 3000TA XL series is a Micro Fuel Cell Model B 2CXL desig...

Страница 24: ...plate consisting of two concentric foil rings The rings mate with spring loaded contacts in the sensor block assembly and provide the electrical connection to the rest of the analyzer Figure 2 1 illu...

Страница 25: ...ains in its proper position keeping the electrical output constant The entire space between the diffusion membrane above the cathode and the flexible rear membrane beneath the anode is filled with ele...

Страница 26: ...as iodine bromine chlorine and fluorine are present in the sample In the absence of oxygen no current is generated 2 2 4 The Effect of Pressure In order to state the amount of oxygen present in the sa...

Страница 27: ...igure 2 3 Measuring circuits do not have to compensate for nonlinearities In addition since there is zero output in the absence of oxygen the characteristic curve has close to an absolute zero less th...

Страница 28: ...through the sample system The sample system for the standard instrument incorporates VCR tube fittings for sample inlet and 1 4 outlet tube connections at the rear panel The sample or calibration gas...

Страница 29: ...Trace Oxygen Analyzer Operational Theory Teledyne Analytical Instruments 13 Figure 2 4 Piping Layout...

Страница 30: ...TA XL EU Teledyne Analytical Instruments 14 Figure 2 5A Flow Diagram Sample Under Pressure Standard Figure 2 5B Flow Diagram Low Pressure Model 3000TA XL VS Figure 2 5C Flow Diagram Sample Under Press...

Страница 31: ...module designed to be compatible with any international power source Figure 2 6 shows the location of the power supply and the main electronic PC boards The signal processing electronics including the...

Страница 32: ...Operational Theory 3000TA XL EU Teledyne Analytical Instruments 16 Figure 2 7 Block Diagram of the Model 3000TA XL EU Electronics...

Страница 33: ...ely proportional to the change in the cell output The result is a signal that is temperature independent within a specified tolerance The output from the second stage amplifier is sent to an 18 bit an...

Страница 34: ...Operational Theory 3000TA XL EU Teledyne Analytical Instruments 18...

Страница 35: ...any damage to the shipping agent 3 2 Mounting the Analyzer The Model 3000TA XL EU is for indoor use in a general purpose area It is NOT for hazardous environments of any type The standard model is des...

Страница 36: ...t edge and doubles as the door that provides access to the sensor and cell block inside the instrument The door latch is spring loaded and will swing open when the button in the center of the latch up...

Страница 37: ...power communication and both digital and analog concentration output via the 50 pin Equipment Interface Connector Figure 3 3 Rear Panel of the Model 3000TA XL EU 3 3 1 Gas Connections Note Do not remo...

Страница 38: ...am of the analyzer input VACUUM SERVICE If the sample pressure is at atmospheric or very low pressure the instrument must be ordered with the vacuum service option This will ensure that the flow contr...

Страница 39: ...wer cord receptacle accepts US or European size fuses A jumper replaces the fuse in whichever fuse receptacle is not used Fuses are not installed at the factory Be sure to install the proper fuse as p...

Страница 40: ...Range 16 mA High Range 20 mA Air Cal Range Table 3 1 Analog Output Connections Pin Function 3 Range ID 4 20 mA floating 4 Range ID 4 20 mA floating 5 Range 4 20 mA floating 6 Range 4 20 mA floating 8...

Страница 41: ...failsafe or non failsafe Can be configured as latching or non latching Can be configured out defeated System Alarm Actuates when DC power supplied to circuits is unacceptable in one or more parameters...

Страница 42: ...erminate when done A synchronous signal must open and close the external zero valve appropriately See Remote Probe Connector The C option internal valves operate automatically Span Floating input 5 to...

Страница 43: ...tion will repeat and the Cal Relay Contact CRC will close again For example 1 Test the CRC When the CRC is open Send a zero command until the CRC closes The CRC will quickly close 2 When the CRC close...

Страница 44: ...ID Contact 19 Range 3 ID Contact 18 Range 3 ID Contact 34 Range 4 ID Contact Air Cal 35 Range 4 ID Contact Air Cal 3 3 2 2 7 Network I O A serial digital input output for local network protocol At th...

Страница 45: ...nes is 100 mA If two lines are ON at the same time each must be limited to 50 mA etc If more current and or a different voltage is required use a relay power amplifier or other matching circuitry to p...

Страница 46: ...h alarms if any are disabled AL x DISABLED Which alarms if any are tripped AL x ON Each status output is followed by a carriage return and line feed Three input functions using RS 232 have been implem...

Страница 47: ...e instrument is shipped It must be installed before the analyzer is placed in service The Micro Fuel cell is located inside the stainless steel cell block behind the front panel see Figure 3 7 To inst...

Страница 48: ...will be reduced to two hours or less If exposure to air or other high oxygen concentration atmospheres is anticipated retrofit your instrument to use the Insta Trace Micro fuel Cell Figure 3 7 Instal...

Страница 49: ...the bottom rear of the cell block The hole in the cell block holder must align with the guide pin on the cell block 1 Remove power from the instrument 2 Remove the old sensor if installed Discard in a...

Страница 50: ...table low value within 30 minutes or less after installation Figure 3 8 Installing the Insta Trace Micro fuel Cell 3 5 Testing the System Before plugging the instrument into the power source Check the...

Страница 51: ...tion Teledyne Analytical Instruments 35 Check that inlet sample pressure is within the accepted range see Section 3 3 1 Power up the system and test it by repeating the Self Diagnostic Test as describ...

Страница 52: ...Installation 3000TA XL EU Teledyne Analytical Instruments 36...

Страница 53: ...hen choose autoranging or select a fixed range of analysis as required Set alarm setpoints and modes of alarm operation latching failsafe etc Before you configure your 3000TA XL EU these default value...

Страница 54: ...to the operator via the function buttons The six function buttons on the analyzer are Analyze This is the normal operating mode The analyzer monitors the oxygen content of the sample displays the perc...

Страница 55: ...ton unless password restrictions apply The order as presented in this manual is appropriate for an initial setup Each of these functions is described in greater detail in the following procedures The...

Страница 56: ...must log out to activate it Until then anyone can continue to operate the instrument without entering the new password Only one password can be defined Before a unique password is assigned the system...

Страница 57: ...Up or Down keys When TRACK is selected the analog outputs 0 1 VDC and 4 20 ma and the range ID contacts will track the instrument readings during calibration either zero or span TRACK is the factory d...

Страница 58: ...ote If you require highly accurate Auto Cal timing use external Auto Cal control where possible The internal clock in the Model 3000TA XL EU is acurate to 2 3 Accordingly internally scheduled calibrat...

Страница 59: ...rs can be done only after the password is entered span and zero settings alarm setpoints analysis range definitions switching between autoranging and manual override setting up an auto cal and assigni...

Страница 60: ...the password using the arrow keys to scroll back and forth between letters and the arrow keys to change the letters to the proper password Press Enter to enter the password If the password is accepte...

Страница 61: ...the arrow keys to move back and forth between the existing password letters and the arrow keys to change the letters to the new password The full set of 94 characters available for password use are sh...

Страница 62: ...0 0 ppm Anlz AL 1 Note If you log off the system using the logout function in the system menu you will now be required to re enter the password to gain access to Span Zero Alarm and Range functions 4...

Страница 63: ...est remotely from a computer See Section 5 6 To initiate a self diagnostic test during operation Press the System button to start the System function TRAK HLD Auto Cal PSWD Logout More Use the arrow k...

Страница 64: ...t is 0 to 1 ppm we recommend the analyzer be calibrated using a span gas as detailed below Span Gas Calibration Before the cell is ready for calibration it must be purged with sample gas to low oxygen...

Страница 65: ...during the first 10 days of the operation of the cell The Zero button on the front panel is used to enter the zero calibration function Zero calibration can be performed in either the automatic or ma...

Страница 66: ...en AUTO and MAN zero settling Stop when MAN appears blinking on the display Zero Settling Man ENT To Begin Press Enter to begin the zero calibration After a few seconds the first of five zeroing scree...

Страница 67: ...intenance 4 4 2 Span Cal The Span button on the front panel is used to span calibrate the analyzer Span calibration can be performed using the automatic mode where an internal algorithm compares conse...

Страница 68: ...ue is shown in the upper left corner of the display As the span reading settles the screen displays and updates information on Slope Spanning automatically ends when the span output corresponds within...

Страница 69: ...is sufficiently stable press Enter Generally when the Span reading changes by 1 or less of the full scale of the range being calibrated for a period of ten minutes it is sufficiently stable Once Ente...

Страница 70: ...h the analyzer at one time Failure to do so may result in spikes in output when the dead ended stream is switched in For further information read the Technical Bulletin TB00001 dated 3 98 This Bulleti...

Страница 71: ...an be set as latching or non latching and either failsafe or non failsafe or they can be defeated altogether The setpoints for the alarms are also established using this function Decide how your alarm...

Страница 72: ...under conditions which would normally activate the alarms The defeat function can also be used to reset a latched alarm See procedures below If you are using password protection you will need to enter...

Страница 73: ...abled instruments can set the alarm parameters from a remote computer See Section 5 3 4 7 The Range Function The Range function allows the operator to program up to three concentration ranges to corre...

Страница 74: ...o blink the range to be set low L medium M or high H Use the arrow keys to enter the upper value of the range all ranges begin at 0 ppm Repeat for each range you want to set Press Enter to accept the...

Страница 75: ...at 1 VDC or 20 mA However the digital readout and the RS 232 output continue to read the true value of the oxygen concentration regardless of the analog output range 4 8 The Analyze Function Normally...

Страница 76: ...4 50 0 5 12 0 60 0 6 13 6 70 0 7 15 2 80 0 8 16 8 90 0 9 18 4 100 1 0 20 0 The analog output signal has a voltage which depends on the oxygen concentration AND the currently activated analysis range T...

Страница 77: ...s of a problem when using the Insta Trace sensor which is specifically designed to allow rapid recovery from accidental high oxygen exposures In the event that flow is to be interrupted into the analy...

Страница 78: ...next field by using the Right Left arrow keys Once the address is set press the Enter key The 3000 microcontroller will send the new address to the Ethernet Web Enabled co processor The 3000 I series...

Страница 79: ...EU I Trace Oxygen Analyzer 2 Connect the analyzer to a network through the RJ45 connector on the side of the instrument 3 Now you can access the analyzer through an internet browser by typing the IP...

Страница 80: ...1 Analyzer Status Window Running This screen shows the relevant status of the analyzer such as oxygen reading current range alarm status etc On the top of the web page there are six functions that can...

Страница 81: ...ibration valves under its control Refer to Section 3 3 2 2 8 for remote probe connector outputs that can be used to control calibration valves After installing the instrument verify manually through t...

Страница 82: ...Web Implementation 3000TA XL EU Teledyne Analytical Instruments 66 Figure 5 2 Span Calibration Window...

Страница 83: ...n to be automatic or manual Once set click the Start button If an auto calibration was chosen the operator must wait for the analyzer to finish the calibration In the main data window the field mode w...

Страница 84: ...ed with current settings on the alarms To find out what each function does refer to the alarm section in Chapter 4 Only one alarm can be set each time Adjust all the parameters on the alarm of interes...

Страница 85: ...and the range menu will appear on the left side of the web page After a few seconds the data area will show the current settings of the instrument The operator can perform changes such as fixing the a...

Страница 86: ...5 5 System Menu By clicking the System button some settings found in the system menu from the front of the control panel can be set such as Zero Offset Alarm Delay and Auto Calibration Description of...

Страница 87: ...he message window for acknowledgement that the instrument entered the self diagnostic mode In the main data window the field mode will switch from analyzing to self test The self test should not take...

Страница 88: ...Web Implementation 3000TA XL EU Teledyne Analytical Instruments 72...

Страница 89: ...ith no electrolyte to change or electrodes to clean When the cell reaches the end of its useful life it is replaced The spent fuel cell should be discarded according to local regulations This section...

Страница 90: ...l CAUTION DO NOT DISTURB THE INTEGRITY OF THE CELL PACKAGE USED IN SHIPPING THE B 2CXL MICRO FUEL CELL UNTIL THE CELL IS TO ACTUALLY BE USED IF THE CELL PACKAGE IS PUNCTURED AND AIR IS PERMITTED TO EN...

Страница 91: ...e cell block This releases the cell and cell holder from the block The cell and holder will fall out in your hand 6 2 4 Installing a New Micro Fuel Cell Before installing a new cell check the O ring i...

Страница 92: ...Maintenance 3000TA XL EU Teledyne Analytical Instruments 76 Figure 6 1 Removing the Micro Fuel...

Страница 93: ...to the front of this manual for special information applying to your instrument With regard to spare cells warranty period begins on the date of shipment The customer should purchase only one spare ce...

Страница 94: ...eturn the cell in question to the factory for evaluation If it is determined that failure is due to faulty workmanship or material the cell will be replaced at no cost to you Note Evidence of damage d...

Страница 95: ...g Fuses 6 4 System Self Diagnostic Test 1 Press the System button to enter the system mode 2 Use the arrow keys to move to More and press Enter 3 Use the arrow keys to move to Self Test and press Ente...

Страница 96: ...ging open the front panel as described earlier Other internal components are accessed by removing the rear panel and sliding out the entire chassis See Figure 6 5 below The gas piping is illustrated i...

Страница 97: ...he instrument is unmounted at time of cleaning disconnect the instrument from the power source Close and latch the front panel access door Clean outside surfaces with a soft cloth dampened slightly wi...

Страница 98: ...vent and affecting the oxygen level which the sensor sees Solution Increase flow rate and or length or vent tubing in order to dilute or minimize the diffusion of oxygen from the vent back to the sens...

Страница 99: ...ystem All wetted parts of 316 stainless steel 90 Response Time 65 seconds at 25 C 77 F on 10 ppm range 100 seconds on 1 ppm range Ranges Three user definable ranges from 0 1 ppm to 0 250 000 ppm plus...

Страница 100: ...t 0 1 ppm 5 of full scale over operating temperature range except 0 10 ppm and 0 1 ppm analysis range once thermal equilibrium is reached 0 1 ppm on 0 1 ppm analysis range once thermal equilibrium is...

Страница 101: ...ro Fuel Cell do not store for more than 6 months 1 B66378 B2C adaptor for cell block 1 B73592 Insta Trace Micro fuel Cell Order C 6689 B2CXL or B73592 depending on your instrument configuration A mini...

Страница 102: ...Appendix 3000TA XL EU Teledyne Analytical Instruments 86 A 3 Drawing List D 69604 Outline Drawing A 4 19 inch Relay Rack Panel Mount Figure A 1 Single and Dual 19 Rack Mounts dimensions in mm...

Страница 103: ...low flow rate will result in a slow response to any O2 changes in the sample stream The span flow rate should be approximately the same as the sample flow rate CELL PRESSURE CONCERNS The sensors used...

Страница 104: ...e sample through the analyzer The needle valve is chosen to operate over a specific range of pressures and provide a useable flow rate over that range 2 The needle valve provides a pressure drop This...

Страница 105: ...ustry CA 91749 Phone 626 961 9221 Technical Support 626 934 1673 Environment Health and Safety 626 934 1592 Date Prepared 11 23 98 Section II Physical and Chemical Data Chemical and Common Names Potas...

Страница 106: ...OH Effects of overexposure Ingestion The electrolyte could be harmful or fatal if swallowed Oral LD50 RAT 3650 mg kg Eye The electrolyte is corrosive eye contact could result in permanent loss of visi...

Страница 107: ...de in the event that a cell leaks Protective clothing Rubber gloves chemical splash goggles Clean up procedures Wipe down the area several times with a wet paper towel Use a fresh towel each time Prot...

Страница 108: ...Appendix 3000TA XL EU Teledyne Analytical Instruments 92...

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