INSTRUCTION MANUAL 311XL SERIES 0-2 PPM Full Scale Trace Oxygen Analyzer DANGER 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.
INSTRUCTION MANUAL FOR TRACE OXYGEN ANALYZER MODEL 311XL TELEDYNE ANALYTICAL INSTRUMENTS 16830 CHESTNUT STREET CITY OF INDUSTRY, CA 91749 TELEPHONE: (888) 789-8168 (626) 934-1500 (626) 961-9221 FAX: (626) 961-2538 (626) 934-1651 Web: www.teledyne-ai.
WARNING The sensor(s) used in this instrument uses electrolytes which contain substances that are extremely harmful if touched, swallowed, or inhaled. Avoid contact with ANY fluid or powder in or around the unit. What may appear to be plain water could contain one of these toxic substances. SKIN CONTACT: Flush contact area with cold water for several minutes. Seek medical attention. EYE CONTACT: Flush with cold water for at least 15 minutes. Seek immediate medical attention.
TABLE OF CONTENTS 311XL SERIES 1. INTRODUCTION 1.1 Description 1.2 Method of Analysis 1.3 Outstanding Features 1.3.1 Micro-Fuel Cell 1.3.2 Reliable Calibration 1.3.3 Integral Power Supply 1.3.4 Accuracy and Response 1.3.5 Compact Packaging 1 1 1 1 1 2 2. SUPPORTING EQUIPMENT AND SERVICES 2.1 Sampling Equipment 2.2 Power Service 4 4 4 3. OPERATION 3.1 Introduction 3.2 Calibration 3.2.1 Standard (Span) Calibration Procedure 3.3 Positive Pressure Sampling 3.
311XL SERIES TRACE OXYGEN ANALYZER 1. INTRODUCTION 1.1 Description: The Teledyne Analytical Instruments (TAI) Model 311XL and 311TCXL are portable, intrinsically safe trace oxygen analyzer which can be operated without an external power source. These analyzers will be referred to as Model 311XL or 311XL Series analyzers in this manual.
1.3.2 Reliable Calibration. Although this instrument can be calibrated with air, the use of a calibration gas gives better results on the lower PPM ranges. If the instrument is exposed to high concentrations of oxygen (percent levels), it will take a significant amount of time to purge the oxygen from the sensor and analyzer for use in the low PPM level measurements (24 hours or longer). 1.3.3 Integral Power Supply. The differential power +/- 3.6 volts D.C.
A current limiting resistor (R1 and R2) is potted into the end of each battery. This assures that under no circumstances can more than 25 milliamperes (100 milliwatts) be switched or drawn from either battery supply. This means that the Model 311XL may be used in explosive atmospheres where arcs of 100 milliwatts or less can be tolerated. This safety feature does not apply when the instrument is being charged (AC power cord connected and selector switch in the “OFF” position).
2. SUPPORTING EQUIPMENT AND SERVICES 2.1 Sampling Equipment. The customer must provide a means of controlling the pressure and flowrate of the sample gas. For positive pressure applications, TAI suggests a simple throttle valve installed in the sample line between the sample point and the analyzer. The flowrate should be limited to between 0.5 and 5 liters/min. IMPORTANT: If a pressure regulator is necessary or desirable, it must have a metallic diaphragm.
3.1 Introduction. The Model 311XL is supplied completely assembled and ready for instant use. The Micro-Fuel Cell must be installed prior use. When a sensor is first installed, the instrument should be purged for 12-16 hours with zero gas (an inert gas such as nitrogen or argon with less than 0.1 ppm oxygen). This will remove any trace levels of oxygen from the sensor or the instrument.
Span gas: An inert gas (nitrogen or argon) with a known trace amount of oxygen. The oxygen content should be 70 – 90% of the full scale on the range of interest (working or primary range). Note, if this instrument is exposed to high concentrations of oxygen (percent levels), it will take a significant amount of time to purge the oxygen from the sensor and analyzer for use for low PPM level measurements. For best results, calibration should be done on the range of use.
2) Establish a flowrate in the sample line of from 0.2 to 5 liters/min. Allow the sample to flow long enough to allow a stable low reading to be achieved. When disconnecting the instrument, reverse the procedure: source fitting first, and then vent fitting. The objective of the connection -- disconnection procedure is to obviate the possibility of pressurizing the manifold.
that an overnight recharge be accomplished every three (3) weeks of continuous use. To recharge the batteries, place the range switch in the “OFF” position and connect the power cord to a convenient outlet. NOTE: The amber charge lamp (on the rear of the case) will be lit during charging process. The integral charging circuit will automatically energize and regulate the battery charging current when the switch is in the “OFF” position and the AC cord is plugged into the power line.
The spare cell should be carefully stored in an area that is not subject to large variations in ambient temperature (75 Deg. F nominal), and in such a way as to obviate any possibility of damage. Under no circumstances, disturb the integrity of the cell package until the cell is to be actually used. No tools are required to replace the cell in the instrument. Simply unscrew (ccw) the plug at the bottom of the analyzer and the cell will drop out of the manifold cavity.
5. TRANSDUCER AND TEMPERATURE COMPENSATION The Micro-Fuel Cell has an inherent positive temperature coefficient, the effects of which have been minimized through the implementation of a thermistor compensation circuit. Internal electronic calibration is accomplished by TAI. However, should there by any doubt, the following procedure can be used to recalibrate the electronics. Refer to Schematic. 1. 2. 3. 4. 5. Disconnect cell. Move range switch to “CAL” position.
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Accuracy at 25oC and constant pressure after thermal equilibrium has been reached. Basic accuracy +/- 2% of full scale for all ranges except 0-2 PPM range. Accuracy for 0-2 PPM range (+/- 5% of full scale). Accuracy over the temperature range 0-35C at constant pressure after thermal equilibrium has been reached. Basic accuracy +/- 5% of scale for all ranges except 0-2 PPM range. Accuracy for 0-2PPM range (+/- 10% of full scale).
1 F-51 1 2 1 1 1 C6689 -B2CXL B-9905 L-79 M70 B-70283 1 1 1 A36289 A205 A246 MICRO-FUSE, 0.5 AMP., FAST-BLOW (FOR 100-115 VAC) MICRO-FUEL CELL, CLASS B-2CXL BATTERY LAMP METER. DIAL-RANGE OF 0-2, 0-10 ppm O2 & CAL. (USE WITH M70 METER) CALIBRATION KIT OP-AMP A3 (LF441) OP-AMP A1 (MAX 430) A MINIMUM CHARGE IS APPLICABLE TO SPARE PARTS ORDERS.
C-70246 SCHEMATIC D-70268 OUTLINE C-14627 WIRING DIAGRAM (110 VAC) C-10470 WIRING DIAGRAM (220VAC) DRAWING LIST MODEL 311TCXL NOTE: C-70248 SCHEMATIC D-70270 OUTLINE C-41661 WIRING DIAGRAM (110 VAC) C-37938 WIRING DIAGRAM (220VAC) The MSDS on this material is available upon request through the Teledyne Environmental Health and Safety Coordinator. Contact at (626) 934-1592.
