Related Manuals for Teledyne 7120
Summary of Contents for Teledyne 7120
- Page 1 Table of Contents OPERATING INSTRUCTIONS 7120 Model Photometric IR Analyzer Table of Contents Explosion Proof for Class I, Division I, Groups B, C, D Teledyne Analytical Instruments...
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Page 2: Table Of Contents
Model 7120 Photometric Analyzer Table of Contents 1 Introduction 1.1 Overview ................ 1-1 1.2 Typical Gas Applications ..........1-1 1.3 Main Features of the Analyzer ........1-2 1.4 General ................1-3 1.5 NDIR Analyzer ............... 1-3 2 Installation 2.1 Unpacking the Analyzer ..........2-1 2.2 Installing &... - Page 3 4.3.10 Zero Offset Adjustment .......... 4-13 4.3.11 CAL-OUT Funtion ..........4-14 4.4 The Zero and Span Functions ........4-16 4.4.1 Zero Cal ..............4-16 4.4.1.1 Auto Mode Zeroing ........4-17 3.4.1.2 Manual Mode Zeroing ........4-18 3.4.1.3 Cell Failure ............ 4-18 Teledyne Analytical Instruments...
- Page 4 5.5 Major Internal Components ..........5-4 5.6 Troubleshooting ............. 5-7 6.7 General ................5-7 5.8 Troubleshooting Chart ........... 5-8 A Appendix Model 7120 Specifications ............. A-1 Recommended 2-Year Spare Parts List ......... A-4 Drawing List ................A-4 Exceptions, Gas Cnditions ............. A-6 Teledyne Analytical Instruments...
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Page 5: Introduction
The manual covers the Model 7120 Explosion Proof Bulk mounted analyzer. Consisting of an Analysis section and Control Unit section. The 7120 Analyzer is for indoor or protected use in Explosion Proof environ- ments only. Typical Gas Applications Typical applications of the Model 7120 are for ppm’s to % ranges:... -
Page 6: Main Features Of The Analyzer
CO, CO2, CH4, C2-C6 HC’s, H2Ov (500ppm to 8% possible Main Features of the Analyzer The Model 7120 Photometric Analyzer is sophisticated yet simple to use. The main features of the analyzer include: • A easy-to-use front panel interface that includes a red 5-digit... -
Page 7: General
Circuitry necessary to drive the display and to provide volt- age and/or current outputs for external recorders or indicators is located in the control Unit. Software timer used, for automatically zeroing the ana- lyzer, can be programmed on the front panel. Teledyne Analytical Instruments... - Page 8 1 Introduction Model 7100 7120 piping schematic (typical) Teledyne Analytical Instruments...
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Page 9: Installation
32°F nor rise above 100°F. In areas outside these temperatures, auxillary heating/cooling must be supplied. The 7120 enclosure is oil and dust resistant though designed to resist moisture. Mounting to walls or racks must be made securely. Avoid locations that are subject to extreme vibration and sway. -
Page 10: Iuser Connections
2 Installation Model 7120 surface. When installed as a system with enclosure (non-panel or rack mounted) a waterproof mastic should be liberally applied to the under surfaces of all supporting legs of the cubicle system before placing it in position and bolting it in place. -
Page 11: Pipe Connection
Electrical Connections Figure 2-2 shows the Model 7120 interface panel. There are connectors for power, digital communications, and both digital and analog concentration output. For safe connections, no uninsulated wiring should be able to come in contact with fingers, tools or clothing during normal operation. -
Page 12: Primary Input Power
2 Installation Model 7120 CAUTION: Use Shielded Cables. Also, use plugs that provide excellent EMI/RFI protection. The plug case must be connected to the cable shield, and it must be tightly fastened to the analyzer with its fastening screws. Ultimately, it is the installer who ensures that the connections provide adequate EMI/RFI shielding. -
Page 13: Analog Outputs
0 concentration to 20 mA at full scale. (Full scale = 100% of programmable range.) 4–20 mA dc Range ID: 8 mA = Range 1, 12 mA = Range 2, 16 mA = Range 3, 20 mA = Range 4. Figure 2-3: Analog Output Connections Teledyne Analytical Instruments... - Page 14 2 Installation Model 7120 Current Optional CURRENT VOLTAGE Floating Negative ground Insert wire here. Press here to insert wire. Release to hold. 4-20mA O/P 4-20mA O/P 0-1 V O/P 0-1 V O/P % RANGE RANGE ID % RANGE RANGE ID The analog output signal has a voltage which depends on gas concen- tration relative to the full scale of the range.
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Page 15: Alarm Relays
• Can be configured as failsafe or nonfailsafe. • Can be configured as latching or nonlatching. • Can be configured out (defeated). Threshold Alarm 2: • Can be configured as high (actuates when concen- tration is above threshold), or low (actuates when Teledyne Analytical Instruments... - Page 16 2 Installation Model 7120 concentration is below threshold). • Can be configured as failsafe or nonfailsafe. • Can be configured as latching or nonlatching. • Can be configured out (defeated). System Alarm: Actuates when DC power supplied to circuits is unacceptable in one or more parameters.
- Page 17 THRESHOLD ALARM 1 Remote Calibration Protocol: To properly time the Digital Remote Cal Inputs to the Model 7120 Analyzer, the customer's controller must monitor the Cal Relay Contact. When the contact is OPEN, the analyzer is analyzing, the Remote Cal Inputs are being polled, and a zero or span command can be sent.
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Page 18: Range Id Relays
Cal Contact Cal Contact Remote Calibration Protocol: To properly time the Digital Remote Cal Inputs to the Model 7120 Analyzer, the customer's controller must monitor the Cal Relay Contact. When the contact is OPEN, the analyzer is analyzing, the Remote Cal Inputs are being polled, and a zero or span command can be sent. - Page 19 Note: The Remote Probe connector provides signals to operate the zero and span gas valves synchronously. However, if you have the –C Internal valve option, which includes zero and span gas inputs, the 7120 automatically regulates the zero, span and sample gas flow. 2.3.3.4...
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Page 20: Network I/O
2.3.3.6 Remote Valve Connector The 7120 is a single-chassis instrument, which has no Remote Probe Unit. Instead, the Remote Valve connector is used as another method for controlling external sample/zero/span gas valves. See Figure 2-7. Figure 2-7: Remote Probe Connector Pinouts The voltage from these outputs is nominally 0 V for the OFF and 15 V dc for the ON conditions. -
Page 21: Rs-232 Port
Table 2-3. Table 2-8: Commands via RS-232 Input Command Description as<enter> Immediately starts an autospan. az<enter> Immediately starts an autozero. rp<enter> Allows reprogramming of two System functions: APPLICATION (gas use) and ALGORITHM (linearization). Teledyne Analytical Instruments 2-13... -
Page 22: Gas Requirements
Toggling input. Stops/Starts any status message output from the RS-232, until st<enter> is sent again. Implementation: The RS-232 protocol allows some flexibility in its implementation. Table 2-9 lists certain RS-232 values that are required by the Model 7120 implementation. Table 2-9: Required RS-232 Options Parameter Setting... -
Page 23: Calibration
The 7120 has a continuous flowing optical reference gas path that the sample is compared to, so it must be very pure, i.e, CO2 purity of 99.995%. -
Page 24: Start-Up And Theory Of Operation
In case the instrument is part of a multi instrument system, where all instruments are connected to the same sample system and under control of a single timer, all instruments of the system will go through the zero and sample cycle simultaneously. The Control Unit of the instrument which Teledyne Analytical Instruments... -
Page 25: Operational Calibration
3 Start-up and Theory of Operation Model 7120 houses the timer and operates the sampling system is called the master. The other Control Units of the other instruments are called slaves. Each of the other instruments may be monitoring the concentration of several different gases of interest in the sample, for example CO, CO2 and/or Combustibles as CH4 in flue gas. -
Page 26: Analyzer
An electronics system to process the changes in the electronic resistance of the detector, and to convert these changes into specific electronics signals that deliver a voltage at current linearly proportional to the concentration of the gas measured. The Teledyne NDIR analyzer employs all of the above features. 3.3.2 Analyzer The emitted IR energy is generated by two specially configured miniature lamps in parabola’s focused and operating at low power of only 0.5 watts. - Page 27 Alarm 2 System Failure Alarm RS-232 Central Processing Range Unit Contacts (4) (CPU) Displays Processing External Valve Control Remote Span Control Power Remote Zero A to D Conv Supply Control Contact Block Diagram of the Model 7120 Electronics Teledyne Analytical Instruments...
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Page 28: Circuit Description
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Page 29: Digital Signal Processing & Electronics
Digital Signal Processing & Electronics The Model 7120 uses an 8031 microcontroller (Central Processing Unit—CPU) with 32 kB of RAM and 128 kB of ROM to control all signal processing, input/output, and display functions for the analyzer. System power is supplied from a universal power supply module designed (C65507) to be compatible with any international power source. -
Page 30: Linearizer
“Beers Law”). Figure I shows this non-linear response. Figure I Gas Concentration In order to produce a linear signal response, a compensation curve is required (see Figure II). Therefore, a linearizer software routine is included Teledyne Analytical Instruments... -
Page 31: Control Unit
3 Start-up and Theory of Operation Model 7120 to create a linear response. Refer to section 4.3.7 and 4.8.2 to see how linearizer is programmed. Figure II Linearizer Input Piece-wise approximation is the method used to linearize the signal, i.e., the linearizer’s output to input relationship can be graphed as a number of... -
Page 32: Automatic Function
The time between zero cycles, may be programmed to last from one (1) to 23 hours. For “Purity Measurements” typical zeroing is performed every 3 hours. This may increase or decrease depending upon the complexity of the application involved. Teledyne Analytical Instruments... - Page 33 3 Start-up and Theory of Operation Model 7120 3-10 Teledyne Analytical Instruments...
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Page 34: Introduction
Operation 4 Operation Introduction Although the Model 7120 is usually programmed to your application at the factory, it can be further configured at the operator level, or even, cau- tiously, reprogrammed. Depending on the specifics of the application, this might include all or a subset of the following procedures: •... -
Page 35: Using The Controls
4 Operation Model 7120 Using the Controls To get the proper response from these controls, press the desired key (ESCAPE or ENTER—DOWN or UP). To enter the screen menu, press any key. The item that is between arrows on the screen is the item that is currently selectable by pressing the ENTER enter key. -
Page 36: Setup Mode
ALOGORITHM Range Verify/Setup Range Enter Values Auto/Manual Linearity Cal Set Zero OFFSET Select Linrty Offset Enter Span Values Auto Calibrate one CAL-INDPD range at a time ON w/out STAND-BY displays/outputs Figure 4-1: Hierarchy of Functions and Subfunctions Teledyne Analytical Instruments... - Page 37 4 Operation Model 7120 4.2.1.2 Setup Mode The MAIN MENU consists of 14 functions you can use to customize and check the operation of the analyzer. Figure 4-1 shows the functions available with the 7100. They are listed here with brief descriptions: 1 AUTO-CAL: Used to define and/or start an automatic calibration sequence.
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Page 38: Data Entry
When the last field is entered, ENTER takes you to the next screen in the process, or if the process is completed, ENTER takes you back to the ANA- LYZE screen. 4.2.2.2 ESCAPE Pressing the ESCAPE key takes you back to the previous screen. Teledyne Analytical Instruments... -
Page 39: Enter
4 Operation Model 7120 If you do not wish to continue a function, you can abort the session by escaping . Escaping a function takes the analyzer back to the previous screen, or to the ANALYZE Function, depending on the function escaped. -
Page 40: Password Protection
UP or DOWN key to change the letters to the proper password. The last ENTER enters the password. In a few seconds, you will be given the opportunity to change this pass- word or keep it and go on. Change Password? <ENT>=Yes <ESC>=No Teledyne Analytical Instruments... -
Page 41: Installing Or Changing The Password
4 Operation Model 7120 Press Escape to move on, or proceed as in Changing the Password, below. 4.3.3.2 Installing or Changing the Password If you want to install a password, or change an existing password, proceed as above in Entering the Password. When you are given the opportunity to... -
Page 42: Logging Out
1 and 1024. (See System Self Diagnostic Test in chapter 5 for number code.) If any of the functions fails, the System Alarm is tripped. Note: The sensor will always show failed unless identical gas is present in both channels at the time of the SELF-TEST. Teledyne Analytical Instruments... -
Page 43: The Model Screen
4 Operation Model 7120 The self diagnostics are run automatically by the analyzer whenever the instrument is turned on, but the test can also be run by the operator at will. To initiate a self diagnostic test during operation, use the UP/DOWN key to scroll through the MAIN MENU to the SELF–TEST and Enter. -
Page 44: Troubleshooting Information
= 492 (This is the current zero offset from the zero calibration of the gain and range the instrument is on at the moment. It should be between 10,000 to 10,000) Teledyne Analytical Instruments 4-11... -
Page 45: Digital Flter Setup
4 Operation Model 7120 Hard_offset_C=3015 (This is the raw DAC count of the Coarse zero adjustment. It should read between 0 and 4095) Hard_offset_F=2715 (This is the raw DAC count of the Fine zero adjustment. It should read between 0 and 4095) -
Page 46: Zero Offset Adjustment
If you chose MANual zero mode, then you must adjust the zero of the instrument the corresponding section of the manual but with one difference: instead of bringing the display to read zero, you must make the display read zero plus the value entered as offset. Teledyne Analytical Instruments 4-13... -
Page 47: Cal-Out Funtion
4 Operation Model 7120 How the offset value is selected: To find out what the offset value should be, the intended zero calibration gas and the mix of the process background gas must be procured. This of course assumes that the zero gas and the process background gas are very different and that an offset will occur. - Page 48 If instrument is cold started (returned to factory settings) the settings will be returned to 0 and non-NAMUR NE43 compliant. NOTE: Analog 0-1 vdc output does not get calibrated when 4 to 20 madc is adjusted, due to errors introduced by its own electronics. Teledyne Analytical Instruments 4-15...
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Page 49: The Zero And Span Functions
4 Operation Model 7120 The Zero and Span Functions (1) The Model 7100 can have as many as three analysis ranges plus a special calibration range (Cal Range); and the analysis ranges, if more than one, may be programmed for separate or identical gas applications. -
Page 50: Auto Mode Zeroing
Analyze. Software zero is indicated by S–Zero in the lower right corner. ####.## 4 Left=#.### S—Zero The zeroing process will automatically conclude when the output is within the acceptable range for a good zero. Then the analyzer automatically returns to the Analyze mode. Teledyne Analytical Instruments 4-17... -
Page 51: Manual Mode Zeroing
4 Operation Model 7120 4.4.1.2 Manual Mode Zeroing Scroll to Zero and enter the Zero function. The screen that appears allows you to select between automatic or manual zero calibration. Use the UP/DOWN keys to toggle between AUTO and MAN zero settling. Stop when MANUAL appears, blinking, on the display. -
Page 52: Span Cal
DOWN key to toggle between AUTO and MAN span settling. Stop when AUTO appears, blinking, on the display. Select span mode: AUTO Enter to move to the next screen. Span Val: 2Ø.ØØ % <ENT> To begin span Use UP/DOWN key to change the span setting value. Teledyne Analytical Instruments 4-19... -
Page 53: Manual Mode Spanning
4 Operation Model 7120 ENTER will move the blinking field to units (%/ppm). Use UP/DOWN key to select the units, as necessary. When you have set the concentration of the span gas you are using, Enter to begin the Span calibration. -
Page 54: The Alarms Function
In latching mode, once the alarm or alarms trigger, they will remain in the alarm mode even if process conditions revert back to non-alarm conditions. This mode requires an alarm to be recognized before it can be reset. In the non-latching mode, the Teledyne Analytical Instruments 4-21... - Page 55 4 Operation Model 7120 alarm status will terminate when process conditions revert to non- alarm conditions. 4. Are either of the alarms to be defeated? The defeat alarm mode is incorporated into the alarm circuit so that maintenance can be performed under conditions which would normally activate the alarms.
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Page 56: The Range Select Function
The Manual range-switching mode allows you to select a single, fixed analysis range. It then allows you to redefine the upper and lower limits, for the range. Use UP/DOWN key to start the RANGE function, and ENTER Select range mode: MANUAL Teledyne Analytical Instruments 4-23... -
Page 57: Auto Screen
4 Operation Model 7120 Note: If all three ranges are currently defined for different applica- tion gases, then the above screen does not display (because mode must be manual). Instead, the VFD goes directly to the following screen. If above screen displays, use the UP/DOWN arrow keys to Select MANU- AL, and press Enter. -
Page 58: Precautions
Ranges whose upper limits coincide with the lower limits of the next higher range • Ranges where there is a gap between the upper limit of the range and the lower limit of the next higher range. Range schemes that are to be avoided include: Teledyne Analytical Instruments 4-25... -
Page 59: The Analyze Function
4 Operation Model 7120 • Ranges that overlap • Ranges whose limits are entirely within the span of an adjoining range. Figure 4-2 illustrates these schemes graphically. Figure 4-2: Examples of Autoranging Schemes The Analyze Function Normally, all of the functions automatically switch back to the Analyze function when they have completed their assigned operations. -
Page 60: Programming
Normally the Model 7100 is factory set to default to manual range selec- tion, unless it is ordered as a single-application multiple-range unit (in which case it defaults to autoranging). In either case, autoranging or manual range selection can be programmed by the user. Teledyne Analytical Instruments 4-27... - Page 61 4 Operation Model 7120 In the autoranging mode, the microprocessor automatically responds to concentration changes by switching ranges for optimum readout sensitivity. If the upper limit of the operating range is reached, the instrument automatically shifts to the next higher range. If the concentration falls to below 85% of full scale of the next lower range, the instrument switches to the lower range.
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Page 62: The Curve Algorithm Screen
From the MAIN MENU screen, select ALGORITHM, and Enter. Sel rng set algo —> Ø1 Ø2 Ø3 <— Use the UP/DOWN key to select the range: 01, 02, or 03. Then press Enter. Gas use: CO2 Range: Ø -10 Enter again. Teledyne Analytical Instruments 4-29... -
Page 63: Manual Mode Linearization
4 Operation Model 7120 Algorithm setup: VERIFY SETUP UP/DOWN to select and Enter VERIFY to check whether the linearization has been accomplished satisfactorily. INPUT OUTPUT Ø Ø.ØØ Ø.ØØ The leftmost digit (under Dpt) is the number of the data point being moni- tored. -
Page 64: Auto Mode Linearization
Then, each special calibration gas, for each of the intermediate calibration points, is flowed, in turn, through the sensor. As each gas flows, the differential value for that intermediate calibration point is entered from the front panel of the analyzer. Teledyne Analytical Instruments 4-31... -
Page 65: Special Function Setup
4 Operation Model 7120 Note: The span gas use to span the analyzer must be >90% of the range being analyzed. Before starting linearization, perform a standard calibration. See section 4.4. To enter data: From the MAIN MENU screen— 1. Use UP/DOWN to select ALGORITHM , and Enter. -
Page 66: Output Signal Offset
To correct this problem, TAI has added the Polarity Correction feature. This feature can be set as follow: Teledyne Analytical Instruments 4-33... -
Page 67: Gain Preset
4 Operation Model 7120 Close S1-5 range 1 Close S1-6 range 2 Close S1-7 range 3 Close S1-8 cal range Select STANDBY to restart the system. 4.9.3 Gain Preset NOTE: This function will apply only for the analizer that has multiple range and non-linearity. -
Page 68: Maintenance
O position. Remove the power cord from the receptacle. 2. The fuse receptacle is located in the power cord receptacle assembly in the upper left-hand corner of the rear panel. See Figure 5-1 FUSE Figure 5-1: AC Fuse Replacement Teledyne Analytical Instruments... -
Page 69: Routine Maintenance
Replacement is recommended when the element begins to restrict sample flow or upon visual inspection looks clogged and dirty. NOTE: Although not normally included on basic Model 7120 analyzers, input protection filtering is always recom- mended. Refer to the system piping schematic for recom- mended hook-up. -
Page 70: Ndir Analyzer Measurement Cell
2. Use the < > arrow keys to move to More, and press Enter. 3. Use the < > arrow keys to move to Self-Test, and press Enter. The following failure codes apply: Table 5-1: Self Test Failure Codes Power 5 V Failure Teledyne Analytical Instruments... -
Page 71: Major Internal Components
5 Maintenance Model 7120 15 V Failures Both Failed Analog DAC A (0–1 V Concentration) DAC B (0–1 V Range ID) Both Failed Preamp Zero too high Amplifier output doesn't match test input Both Failed >3 Call factory for information (204 may some times appear even if call is ok. - Page 72 This is done by slight modification to the mechanical alignments between the source assembly, sample cell and detector housings. Figure 5-2: Cell Block Teledyne Analytical Instruments...
- Page 73 5 Maintenance Model 7120 Figure 5-3: Cell Assembly WARNING: HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PER- SIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED. Figure 5-4: Major Internal Components Teledyne Analytical Instruments...
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Page 74: Troubleshooting
The following is a listing of parts needed for electronic calibration and troubleshooting of the analyzers: Accurate DC volt-ohm meter (digital readout) with clip-type leads Single-trace medium band width oscilloscope 15Äpin extender card (TAI P/N 9881) Miniature clip-type jumper leads (12" long) Small blade screwdriver (TAI P/N S-190) Teledyne Analytical Instruments... -
Page 75: Troubleshooting Chart
5 Maintenance Model 7120 5.8 TROUBLE SHOOTING CHART SYMPTOM CORRECTIVE ACTION Unit does not turn ON (a) Check AC voltage at inlet for when actuating Power correct voltage. Reset breaker Switch (Motor does not or switch to supply power to turn). - Page 76 Control (with span gas) set; monitor TP6 of preamp board with zero gas and check for cell contamination. (b) Check modulation factor using certified span gas. Full scale concentration provides signal of 0-5 VDC at TPl of the Linearizer Teledyne Analytical Instruments...
- Page 77 5 Maintenance Model 7120 Board. Insufficient signal can be~ due to misadjusted Pl or sample system pressure fluctuations (vacuum). F. Noisy or Erratic The most common sources of Operation noises are: (a) Reduced output of infrared source (5v, 110 ma each) or replace as necessary.
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Page 78: A Appendix
Appendix Model 7120 7120 Specifications % Range(s) PPM Ranges · 98-100% (CO2 purity) 0-500 ppm H2Ov in CL2, N2, CO or COC/2 Other percent applications Other ppm applications · 95-100% CO in H2, N2, O2 0-1000ppm CO in flue gas ·... - Page 79 (482.6mmW X 387.45mmD X 222.25mmH) Enclosure Rating General Purpose Characteristics AREA CLASSIFICATIONS General Purpose Panel mount Class I, Division II, B, C, D Analyzer may be Z-purged without temperature control in some applica- tions. (Accuracy may be sacrificed, contact factory) Teledyne Analytical Instruments...
- Page 80 Appendix Model 7120 Class I, Division I, B, C, D Analyzer may be X-purged without temperature control in some applica- tions. (Accuracy may be sacrificed, contact factory) Class I, Division I, B, C, D Split architeture, Bulk mounted encl’s ELECTRICAL/ELECTRONICS SPECIFICATIONS Features: Output (4-20 mA iso;...
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Page 81: Recommended 2-Year Spare Parts List
(if available) and the model and serial number of the instru- ment for which the parts are intended. Orders should be sent to: TELEDYNE Analytical Instruments 16830 Chestnut Street City of Industry, CA 91749-1580 Phone (626) 934-1500, Fax (626) 961-2538 TWX (910) 584-1887 TDYANYL COID Web: www.teledyne-ai.com... - Page 82 Appendix Model 7120 ATTACHMENT 7120 Quote "Exceptions" and "GAS PHASE Conditions" for this application: Response Time is proportional to sample system design for take-off distance, process pressure, line size, by-pass flow design, dead- volumes/tee's, sample cell volume and instrument electronics.
- Page 83 Special materials may be required. 11 Teledyne is not responsible for applying a general purpose instrument in a hazardous area or where a flammable gas is brought to an ana- lyzer above its lower explosive limit and the area has been classified as general purpose.