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Model 356WA
Trace Oxygen Analyzer
Instruction Manual
HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM.
PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
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.
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Teledyne Analytical Instruments
P/N M356WA
09/14/99
ECO # 99-0373
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Summary of Contents for Teledyne 356WA
- Page 1 HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A P/N M356WA TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED. 09/14/99 ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING. BEFORE CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/MANAGER. ECO # 99-0373 Teledyne Analytical Instruments...
- Page 2 Teledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749- 1580.
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Page 3: Table Of Contents
5.1 Flowmeter and Humidifier ........5-1 5.2 Cell Electrolyte Level ..........5-1 5.3 Reservoir ..............5-1 5.4 Calibration ............... 5-1 5.5 Cell ................5-2 5.5.1 Electrolyte Replacement ......5-2 5.5.2 Lead Electrode..........5-2 5.6 Screen Assembly............. 5-4 Teledyne Analytical Instruments... - Page 4 5.8 Leak Detection ............5-6 5.8.1 Leak Detection Procedure ......5-6 5.8.2 Cell Leak ............5-7 Appendix Specifications ..............A-1 Spare Parts List .............. A-2 Drawing List ..............A-3 Calibration Data .............. A-4 Material Safety Data Sheets ........... A-9 Teledyne Analytical Instruments...
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Page 5: Introduction
Introduction Introduction Introduction The Teledyne Analytical Instruments Model 356WA Trace Oxygen Analyzer is designed to detect oxygen concentrations in process streams. It utilizes Teledyne’s patented electrochemical sensor which requires minimal maintenance and exhibits a 90% response in less than one minute. Cell output is insensitive to flow rate changes within the operating range of the analyzer’s flowmeter. -
Page 6: Required Equipment
It should have an input inpedance of 10 10 10 10 10 or higher. Output is 0 to 1VDC or less (optional: 1 to 5, 4 to 20, or 10 to 50 mADC). Teledyne Analytical Instruments... -
Page 7: Operational Theory
It is necessary to maintain a film of electrolyte on the screens of the electrode assembly. This means that the humidity of the sample as it flows through the cell must be such that the water vapor pressure of the electro- Teledyne Analytical Instruments... -
Page 8: Flow System
In practice, the sample pressure must be somewhat greater than this in order to have an adequate flow rate. The automatic level control in the humidifier column is accomplished by connecting the sample outflow from the cell to the bottom of the reser- Teledyne Analytical Instruments... - Page 9 Oxyg en Anal Operational Theory 2 Operational Theory 2 Cell Pressure Flowmeter ATM + (b - a) Sample In Throttle Vent Valve b - a Reservoir Water Drain Humidifier Column Cell Compartment Figure 2-1: Flow System Schematic Teledyne Analytical Instruments...
- Page 10 The sample bubbling through the make-up water will scrub out any oxygen which may be dissolved in it. This assures that the sample will not pick up any oxygen as it passes through the humidifier column. Teledyne Analytical Instruments...
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Page 11: Installation
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Page 12: Sample Connections
Lines. Lines should consist of metallic tubing, since oxygen can diffuse through plastic. Use continuous tubing where possible. Vent Vent 3. Vent Vent Vent. The analyzed sample is vented through the back of the unit as shown in Figure 2-3. Teledyne Analytical Instruments... - Page 13 The vent line should also be arranged so that it cannot become plugged by dirt or dust. Teledyne Analytical Instruments...
- Page 14 17" 7-15/16" 17-9/16" 18-1/4" Sample 1/4" Female NPT 115 V 50/60 Hz Purge Power In 7/8" dia. holes for 1/2" conduit Signal Out Vent FIGURE 5 ANALYZER OUTLINE DIAGRAM Figure 5: Gas Connections to Back of Analyzer Teledyne Analytical Instruments...
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Page 15: Operations
Electrolyte 4.2.2 4.2.2 Electrolyte The cell electrolyte is Teledyne Type A, used in applications where there is a complete absence of acidic anhydrides (CO , SO ) in the sample gas. Type A electrolyte is a 10% solution (w/v) of reagent-grade potassium hydroxide (KOH) in distilled water. - Page 16 Type C electrolyte is a 20 % solution (w/v) of potassium bicarbonate and should be used when the CO level in the background gas is between 1 and 100 %. Safety related information for this electrolyte can be found in the Appendix. Teledyne Analytical Instruments...
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Page 17: Cell Installation
Oxyg en Anal Operations 4 Operations 4 Sufficient electrolyte is provided for initial servicing of the cell. Elec- trolyte for future service should be ordered from Teledyne. When ordering, specify type and quantity. 4.2.3 4.2.3 Cell Installation Cell Installation 4.2.3... - Page 18 Model 356WA A A A A 4 Operations 4 Operations 4 Operations Model 356W Model 356W Cell Mounting Bolts Terminal Strip No. 4 Flowmeter O-Ring Sample Flow Control Valve Cell Block Humidifier Column Heater Humidifier Column Figure 4-2: Cell Compartment Components Teledyne Analytical Instruments...
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Page 19: Throttle Valve
The humidity control is located on the front panel of the control unit, and is adjusted to maintain a constant electrolyte level in the detector cell. In effect, the control governs the humidity of the sample which is directed to the cell. Teledyne Analytical Instruments... - Page 20 Outside Electrode Connected to "Y" Terminal Post (+) Oxygen Generated Here Electrical Terminal Board Sub-Assembly Wick Saturated With KOH Electrolyte Solution O-Ring Inside Electrode Connected to "B" Terminal Post (-) Hydrogen Generated Here Figure 8: Calibrator Assembly Teledyne Analytical Instruments...
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Page 21: Power
TBE/AI recommends that the oxygen content of the span gas be between 70–90% of full scale on the range of interest. Teledyne Analytical Instruments... - Page 22 4. After the recorder or meter has stabilized on the proper readout, turn off the span gas flow, disconnect the span gas, reconnect the sample gas and establish the proper flow. Teledyne Analytical Instruments...
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Page 23: Flowmeter And Humidifier
If the water level in the reservoir is below 1 " 1 " 1 " 1 " 1 ", add a quart of distilled water. f) Replace the filler spout cap securely after verifying that the O- ring seal is in good condition. Teledyne Analytical Instruments... -
Page 24: Calibration
If the lead electrode is simply discolored, clean the entire cell according to the following procedure: a) Heat a quart of Teledyne cleaning solution to slightly below the boiling point, and completely fill the cell cavity with the heated solution. - Page 25 5 leshooting 5 race Oxyg en Anal Maintenance & Maintenance & leshooting 5 Cell Mounting Nuts (4) Cell Block Terminal seal O-rings (2) Mounting Bolts (4) Lead Electrode Cathode Screen Assembly O-Ring Cover Figure 5-1: Cell Assembly Teledyne Analytical Instruments...
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Page 26: Screen Assembly
Rinse by filling with distilled water and draining several times. h) If the humidifier column still retains deposits on its walls, it should be removed and cleaned with a brush and suitable cleaner. See Teledyne Analytical Instruments... - Page 27 NOTE: NOTE: NOTE: NOTE: and can be removed and reinstalled following the same procedure outlined above. Figure 5-2: Removing/Replacing the Humidifier Refer to the Spare Parts List in the Appen- dix for replacement part numbers for the Teledyne Analytical Instruments...
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Page 28: Leak Detection
Sample connection lines leading to analyzer * A leak at this location may indicate a leak in the column or in the reservoir system. 5.9.2 Cell Leak 5.9.2 Cell Leak 5.9.2 Cell Leak 5.9.2 Cell Leak 5.9.2 Cell Leak Teledyne Analytical Instruments... - Page 29 If the large O-ring at the mounting plate is leaking, the oxygen indica- tion will begin rising almost immediately after the sample flow is stopped. It will continue to rise until sample flow is restarted, at which time it will begin to gradually decrease. Teledyne Analytical Instruments...
- Page 30 • Shut off main power. • Disconnect orange wire from TS1 terminal 5, place a voltmeter (set to AC current, range 0–100 mA) in series with TS1-5 and the disconnected orange wire. CAUTION: High voltage AC present. Teledyne Analytical Instruments...
- Page 31 0–110 to 120V AC. • If not, replace R2 (behind the control knob); see paragraph below. • If there is voltage, replace the heater element; see paragraph below. Teledyne Analytical Instruments...
- Page 32 Interconnection diagram (A4). A-18594 (upper left-hand corner.) • Connect voltmeter (set to high AC) to terminals 1 and 2 of terminal strip TS4 (Schematic diagram D-18632, lower right-hand corner; Wiring diagram C- 18593, upper left-hand corner.) 5-10 Teledyne Analytical Instruments...
- Page 33 • If power does go on and off, the thermoswitch (P/N T22) is faulty and should be replaced. • If none of the above improve the sensitivity, replace the cell. Teledyne Analytical Instruments 5-11...
- Page 34 Maintenance & T T T T T r r r r r oub leshooting leshooting Model 356W Model 356W Model 356WA A A A A Maintenance & Maintenance & oubleshooting leshooting leshooting Model 356W Model 356W 5-12 Teledyne Analytical Instruments...
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Page 35: Specifications
Current: 1-5, 4-20, 10-50 mADC (optional.) Local Readout: Local Readout: Local Readout: Digital or analog meter. Local Readout: Local Readout: * Specified flow rate required only during calibration. Measuring cell is not sensitive to changes in flow rate. Teledyne Analytical Instruments... -
Page 36: Spare Parts List
Teledyne Analytical Instruments... -
Page 37: Drawing List
Appendix Appendix race Oxyg en Anal Appendix Appendix 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 TDYANLY COID Web: www.teledyne-ai.com or your local representative... -
Page 38: Calibration Data
The ambient temperature does not affect the flow rate through the analyzer since the flow tube is located in the same temperature controlled compartment as the cell assembly. Teledyne Analytical Instruments... - Page 39 Ambient pressure can be measured with an accurate barometer. P (mm Hg) = P(in Hg) x 760 30.00 If the actual oxygen concentration were, for example, 8.0 ppm, the resultant reading would be 7.9 (float high) or 8.1 (float low). Teledyne Analytical Instruments...
- Page 40 0-7500 ft. above sea level. Ref: “Fluid Mechanics for Engineering Technology” by Irving Granet, Prentice Hall, pp 83–84. Reference ambient temperature : 294 °K (21 °C) was the ambient temperature used in the Faradaic calculations. Teledyne Analytical Instruments...
- Page 41 Subsequently, it should not be necessary to measure the exit flow unless another circumstance, of the type listed above, occurs. Teledyne Analytical Instruments...
- Page 42 18.8 20.0 21.2 23.9 23.9 25.4 26.9 28.6 30.7 32.1 34.0 35.9 38.0 40.2 42.5 NOTE: The MSDS on this material is available upon request through the Teledyne Environmental, Health and Safety Coordinator. Contact at (626) 934-1592 Teledyne Analytical Instruments...
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