Teledyne 3020T - Manuals

1-1 Trace Oxygen Analyzer Introduction 1 Teledyne Analytical Instruments Introduction 1.1 Overview The Teledyne Analytical Instruments Model 3020T Trace Oxygen Analyzer is a versatile microprocessor-based instrument for detecting oxygenat the parts-per-million (ppm) level in a variety of gases. This...

1-2 1 Introduction Model 3020T Teledyne Analytical Instruments • Advanced Micro-Fuel Cell, redesigned for trace analysis, has anexpected life of one year. • Versatile analysis over a wide range of applications. • Microprocessor based electronics: 8-bit CMOS microprocessorwith 32 kB RAM and 128 kB RO...

1-3 Trace Oxygen Analyzer Introduction 1 Teledyne Analytical Instruments 1.5 Operator Interface All controls and displays on the standard 3020T are accessible from outside the housing. The instrument has two simple operator controls. Adigital meter, an alphanumeric display, and a sample flowmeter gi...

1-4 1 Introduction Model 3020T Teledyne Analytical Instruments 1.5.1 UP/DOWN Switch Functions: The UP/DOWN switch is used to select the function to be performed. Choose UP or DOWN to scroll through the following list ofeleven functions: • Auto-Cal Set up an automatic calibration sequence. • PWD Inst...

1-5 Trace Oxygen Analyzer Introduction 1 Teledyne Analytical Instruments 1.5.3 Displays Digital Meter Display: The meter display is a LED device that produces large, bright, 7-segment numbers that are legible in any lighting. Itproduces a continuous readout from 0-10,000 ppm and then switches to aco...

1-7 Trace Oxygen Analyzer Introduction 1 Teledyne Analytical Instruments • Remote Sensor Used for external sensor andthermocouple, if desired. • Remote Span/Zero Digital inputs allow external control ofanalyzer calibration. • Calibration Contact To notify external equipment thatinstrument is being c...

1-8 1 Introduction Model 3020T Teledyne Analytical Instruments Optional: • Calibration Gas Ports Separate fittings for zero, span and sample gas input, plus internal valves forautomatically switching the gases insync with the 3020 electronics. Note: If you require highly accurate Auto-Cal timing, us...

2-1 Trace Oxygen Analyzer Operational Theory 2 Teledyne Analytical Instruments Operational Theory 2.1 Introduction The analyzer is composed of three subsystems: 1. Micro-Fuel Cell Sensor2. Sample System3. Electronic Signal Processing, Display and Control The sample system is designed to accept the s...

2-2 2 Operational Theory Model 3020T Teledyne Analytical Instruments analyzed. The Micro-Fuel Cell is therefore a hybrid between a battery and atrue fuel cell. (All of the reactants are stored externally in a true fuel cell.) 2.2.2 Anatomy of a Micro-Fuel Cell The Micro-Fuel Cell is a cylinder only ...

2-3 Trace Oxygen Analyzer Operational Theory 2 Teledyne Analytical Instruments At the top end of the cell is a diffusion membrane of Teflon, whose thickness is very accurately controlled. Beneath the diffusion membrane liesthe oxygen sensing element—the cathode—with a surface area almost 4 cm 2 . Th...

2-4 2 Operational Theory Model 3020T Teledyne Analytical Instruments The overall reaction for the fuel cell is the SUM of the half reactions above, or: 2Pb + O 2 → 2PbO (These reactions will hold as long as no gaseous components capable of oxidizing lead—such as iodine, bromine, chlorine and fluorin...

2-5 Trace Oxygen Analyzer Operational Theory 2 Teledyne Analytical Instruments Figure 2-3. Characteristic Input/Output Curve for a Micro-Fuel Cell 2.3 Sample System The sample system delivers gases to the Micro-Fuel Cell sensor from the analyzer gas panel inlets. Depending on the mode of operation e...

2-6 2 Operational Theory Model 3020T Teledyne Analytical Instruments Figure 2-4 is the flow diagram for the sampling system. In the standard instrument, calibration gases (zero and span) can be connected directly to theSample In port by teeing to the port with appropriate valves. The shadedportion o...

2-7 Trace Oxygen Analyzer Operational Theory 2 Teledyne Analytical Instruments Figure 2-5: Block Diagram of the Model 3020T Electronics

2-8 2 Operational Theory Model 3020T Teledyne Analytical Instruments In the presence of oxygen the cell generates a current. A current to voltage amplifier converts this current to a voltage, which is amplified in thesecond stage amplifier. The second stage amplifier also supplies temperature compen...

Trace Oxygen Analyzer Installation 3 3-1 Teledyne Analytical Instruments Installation Installation of the Model 3020T Analyzer includes: 1. Unpacking 2. Mounting 3. Gas connections 4. Electrical connections 5. Installing the Micro-Fuel Cell 6. Testing the system. 3.1 Unpacking the Analyzer The analy...

3 Installation Model 3020T 3-2 Teledyne Analytical Instruments Figure 3-1: Front View of the Model 3020T (Simplified)

Trace Oxygen Analyzer Installation 3 3-3 Teledyne Analytical Instruments Figure 3-2: Required Front Door Clearance 3.3 Electrical Connections Figure 3-3 shows the Model 3020T Electrical Connector Panel. There are terminal blocks for connecting power, communications, and both digitaland analog concen...

3 Installation Model 3020T 3-4 Teledyne Analytical Instruments For safe connections, ensure that no uninsulated wire extends outside of the connectors they are attached to. Stripped wire ends must insert com-pletely into terminal blocks. No uninsulated wiring should be able to come incontact with fi...

Trace Oxygen Analyzer Installation 3 3-5 Teledyne Analytical Instruments Figure 3-5: Analog Output Connections The outputs are: 0–1 V dc % of Range: Voltage rises linearly with increasing oxygen, from 0 V at 0 ppm to 1 V at full scale ppm. (Full scale =100% of programmable range.) 0–1 V dc Range ID:...

3 Installation Model 3020T 3-6 Teledyne Analytical Instruments Table 3-1: Analog Concentration Output—Example Voltage Signal Current Signal ppm O 2 Output (V dc) Output (mA dc) 0 0.0 4.0 10 0.1 5.6 20 0.2 7.2 30 0.3 8.8 40 0.4 10.4 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 ...

3 Installation Model 3020T 3-8 Teledyne Analytical Instruments ZERO: Floating input. 5 to 24 V input across the + and – terminalsputs the analyzer into the Zero mode. Either side may be grounded at the source of the signal. 0 to 1 volt across theterminals allows Zero mode to terminate when done. A s...

Trace Oxygen Analyzer Installation 3 3-11 Teledyne Analytical Instruments Figure 3-7: Remote Solenoid Return Connector Pinouts The voltage from these outputs is nominally 0 V for the OFF and 15 V dc for the ON conditions. The maximum combined current that can bepulled from these output lines is 100 ...

3 Installation Model 3020T 3-12 Teledyne Analytical Instruments When the micro-Fuel Cell needs to be installed or replaced, follow the procedures in chapter 5, Maintenance, for removing and installing cells. 3.5 Gas Connections Before using this instrument, it should be determined if the unit will b...

Trace Oxygen Analyzer Installation 3 3-13 Teledyne Analytical Instruments Figure 3-9: Gas Connector Panel SAMPLE IN: In the standard model, gas connections are made at the SAMPLE IN and EXHAUST OUT connections. Calibration gases must be Tee'd into the Sample inlet with appropriate valves. The gas pr...

3 Installation Model 3020T 3-14 Teledyne Analytical Instruments Note: If the unit is for vacuum service, see Sample In, above, for gas pressure/flow considerations. 3.6 Testing the System Before plugging the instrument into the power source: • Check the integrity and accuracy of the gas connections....

Trace Oxygen Analyzer Operation 4 4-1 Teledyne Analytical Instruments Operation 4.1 Introduction Once the analyzer has been installed, it can be configured for your application. To do this you will: • Establish and start an automatic calibration cycle, if desired.(Electrically operated valves requir...

4 Operation Model 3020T 4-2 Teledyne Analytical Instruments toward UP to move the VFD screen two selections upwards on the list ofoptions (menu). The item that is between arrows on the screen is the item that is cur- rently selectable by choosing ENTER (turn-and-release toward ENTER withthe ESCAPE/E...

Trace Oxygen Analyzer Operation 4 4-3 Teledyne Analytical Instruments 2 PWD : Used to establish password protection or change the existing password. 3 LOGOUT : Logging out prevents unauthorized tampering with the analyzer settings. 4 VERSION : Displays Manufacturer, Model, and Software version of th...

4 Operation Model 3020T 4-4 Teledyne Analytical Instruments 9 RANGE : Used to set up three analysis ranges that can be switched automatically with auto-ranging or used as individualfixed ranges. 10 STANDBY : Remove power to outputs and displays, but maintain power to internal circuitry. Any function...

Trace Oxygen Analyzer Operation 4 4-5 Teledyne Analytical Instruments 4.3 The AUTO-CAL Function When proper automatic valving is connected (see chapter 3, installa- tion), the Analyzer can cycle itself through a sequence of steps that automati-cally zero and span the instrument. Note: If you require...

4 Operation Model 3020T 4-6 Teledyne Analytical Instruments Once a unique password is assigned and activated, the operator MUST enter the UNIQUE password to gain access to any of the set-up functions(except to enter the password). However, the instrument will continue toanalyze sample gas and report...

Trace Oxygen Analyzer Operation 4 4-7 Teledyne Analytical Instruments In a few seconds, if you do not ESCAPE, you will be given the oppor- tunity to change this password or keep it and go on. Change Password? <ENT>=Yes <ESC>=No ESCAPE to move on, or proceed as in Changing the Password, b...

4 Operation Model 3020T 4-8 Teledyne Analytical Instruments A A A A A Retype PWD To Verify Wait a moment for the entry ( <ENT> ) screen. You will be given clearance to proceed. A A A A A <ENT> TO Proceed ENTER the letters of your new password. Your password will be stored in the micropro...

Trace Oxygen Analyzer Operation 4 4-9 Teledyne Analytical Instruments 4.7 The SELF-TEST Function The Model 3020T has a built-in self-testing diagnostic routine. Prepro- grammed signals are sent through the power supply, output board and sensorcircuit. The return signal is analyzed, and at the end of...

4 Operation Model 3020T 4-10 Teledyne Analytical Instruments Although the instrument can be spanned using air, a span gas with a known oxygen concentration in the range of 70–90% of full scale of therange of interest is recommended. Since the oxygen concentration in air is209,000 ppm, the cell can t...

Trace Oxygen Analyzer Operation 4 4-11 Teledyne Analytical Instruments The beginning zero level is shown in the upper left corner of the dis- play. As the zero reading settles, the screen displays and updates informationon Slope (unless the Slope starts within the acceptable zero range and does not ...

4 Operation Model 3020T 4-12 Teledyne Analytical Instruments 4.8.1.3 Cell Failure Cell failure in the 3020T is usually associated with inability to zero the instrument down to a satisfactorily low ppm reading. When this occurs, the3020T system alarm trips, and the VFD displays a failure message. #.#...

Trace Oxygen Analyzer Operation 4 4-13 Teledyne Analytical Instruments typing in the concentration of the span gas you are using, repeatedly selectENTER until the rightmost digit is reached, then, the next ENTER will exit theSpan Val field. One more ENTER will enter the new span value, bring up then...

4 Operation Model 3020T 4-14 Teledyne Analytical Instruments When the Span value displayed on the screen is sufficiently stable, ENTER it. (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 suffi-ciently stable.)...

Trace Oxygen Analyzer Operation 4 4-15 Teledyne Analytical Instruments to non-alarm conditions. This mode requires an alarm to berecognized before it can be reset. In the non-latching mode, thealarm status will terminate when process conditions revert to non-alarm conditions. 4. Are either of the al...

4 Operation Model 3020T 4-16 Teledyne Analytical Instruments –OR – Go to Ltch– and then assert either DOWN two times or UP two times. (Toggle it to N NN N N and back to Y. Y. Y. Y. Y. ) 4.10 The RANGE Function The RANGE function allows the operator to program up to three concentration ranges to corr...

Trace Oxygen Analyzer Operation 4 4-17 Teledyne Analytical Instruments Use the DOWN/UP control to enter the upper value of the range (all ranges begin at 0 ppm). Repeat for each range you want to set. ENTER toaccept the values and return to the Analysis Mode. (See note below.) Note: The ranges must ...

4 Operation Model 3020T 4-18 Teledyne Analytical Instruments output continue to read the true value of the oxygen concen-tration regardless of the analog output range. 4.11 The CONTRAST Function If you cannot read anything on the display after first powering up: 1. Observe LED readout. a. If LED met...

Trace Oxygen Analyzer Operation 4 4-19 Teledyne Analytical Instruments 4.13 The Analysis Mode This is the normal operating mode of the analyzer. In this mode the analyzer is monitoring the sample, measuring and displaying the amount ofoxygen, and reporting alarm conditions. Normally, all of the func...

Trace Oxygen Analyzer Maintenance 5 5-1 Teledyne Analytical Instruments Maintenance 5.1 Routine Maintenance Aside from normal cleaning and checking for leaks at the gas connec- tions, routine maintenance is limited to replacing Micro-Fuel cells and fuses,and recalibration. For recalibration, see Sec...

5 Maintenance Model 3020T 5-2 Teledyne Analytical Instruments Figure 5-1: Major Internal Components To swing open the cover panel, remove all screws. 5.3 Cell Replacement The Micro-Fuel Cell is a sealed electrochemical transducer with no electrolyte to change or electrodes to clean. When the cell re...

Trace Oxygen Analyzer Maintenance 5 5-3 Teledyne Analytical Instruments 5.3.1 Storing and Handling Replacement Cells To have a replacement cell available when it is needed, it is recom- mended that one spare cell be purchased 9-10 months after commissioningthe 3020T, or shortly before the end of the...

5 Maintenance Model 3020T 5-6 Teledyne Analytical Instruments 5.3.4 Installing a New Micro-Fuel Cell It is important to minimize the amount of time that a Teledyne Trace Oxygen Sensor is exposed to air during the installation process. The quicker thesensor can be installed into the unit, the faster ...

Trace Oxygen Analyzer Maintenance 5 5-7 Teledyne Analytical Instruments 5.3.5 Cell Warranty The Class L-2C Micro-Fuel cell is used in the Model 3020T. This cell is a long life cell and is warranted for 1 year from the date of shipment. Ifany other cell is supplied with your instrument, check the fro...

5 Maintenance Model 3020T 5-8 Teledyne Analytical Instruments Figure 5-3: Removing Fuse Cap and Fuse from Holder 2. Replace fuse by reversing process in step 1. 5.5 System Self Diagnostic Test Use the DOWN/UP control to scroll through the MAIN MENU to SELF-TEST . The screen will follow the running o...

A-1 Trace Oxygen Analyzer Appendix Teledyne Analytical Instruments Appendix A-1 Specifications Packaging: Explosion-proof. Bulkhead mount. Sensor: L-2C trace analysis Micro-Fuel Cell. Cell Block: 316 stainless steel. Ranges: Three user definable ranges from 0–10 ppm to 0–250,000 ppm, plus air calibr...

A-2 Appendix Model 3020T Teledyne Analytical Instruments Operating Temperature: 0-50 °C Accuracy: ±2% of full scale at constant temperature.±5% of full scale over operating temperaturerange, on factory default analysis ranges, oncethermal equilibrium has been achieved. Analog outputs: 0-1 V dc perce...

A-3 Trace Oxygen Analyzer Appendix Teledyne Analytical Instruments A-2 Recommended 2-Year Spare Parts List Qty Part Number Description 1 C62371B Display PCB 1 D65295A Customer Interface PCB 1 C62368-A Trace Preamplifier Board 1 C62365-A Main PCB 3 F1295 Fuse, 4A, 250V, 5x20 mm, T (Slow Blow) 1 O165 ...

A-4 Appendix Model 3020T Teledyne Analytical Instruments A-3 Drawing List D65908 Final Assembly Drawing D65909 Outline Drawing D65911 Wiring Diagram

A-5 Trace Oxygen Analyzer Appendix Teledyne Analytical Instruments 3000 SERIES ANALYZERS APPLICATION NOTES ON RESTRICTORS, PRESSURES, AND FLOW RECOMMENDATIONS 3000 series analyzers require reasonably regulated sample pressures. While the 3000 analyzers are not sensitive to variations of incoming pre...

A-6 Appendix Model 3020T Teledyne Analytical Instruments The second function that the restriction device provides is a pressure drop. This device is selected to provide the only significant pressure drop in thesample path. RESTRICTOR KIT The current revision of the 3000 series analyzers are supplied...