Teledyne OT-2 manuale d’uso

i Teledyne Analytical Instruments Model OT -2 System OPERA TING INSTRUCTIONS FOR Model O T -2 Oxygen T ransmitter System P/N: M71265 ECO: #99-0000 10/21/1999 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. ONLY AUTHORIZED PERSONNEL SHO[...]

Teledyne Analytical Instruments ii Model OT -2 System Copyright © 1999 Teledyne Analytical Instruments All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be elec[...]

iii Teledyne Analytical Instruments Model OT -2 System T a ble of Contents 1 Introduction 1.1 Ove r view ........................................................................ 1- 1 1.2 F eatures .......................................................................... 1- 1 1.3 T ypical Applications ...............................................[...]

Teledyne Analytical Instruments iv Model OT -2 System Appendix Specif ications ........................................................................ A-1 Recommended Spare Parts List .......................................... A-2 Drawing List ............................................................................ A-2 Mater ial Safety Data Sh[...]

1-1 Teledyne Analytical Instruments Model OT-2 System Introduction 1 Introduction 1.1 Overview The Teledyne Analytical Instruments Model OT-2 System is designed to accurately monitor the oxygen content in a wide variety of gases at the ppm level. The Trace Oxygen Transmitter is equipped with two oxygen analysis ranges, 0–10 ppm and 0– 100 ppm ([...]

Teledyne Analytical Instruments 1 Introduction Model OT-2 System 1-2 • Accurate (±2% of full scale at constant temperature on 100 ppm, or 1000 ppm scale; ±1 ppm on 0 – 10 ppm scale at constant temperature) • Insensitive to flow variations • Fast response and recovery • Long life, maintenance-free Micro-Fuel Cell oxygen sensor • Unaffe[...]

1-3 Teledyne Analytical Instruments Model OT-2 System Introduction 1 1.4 Operator Interface The OT-2 System is housed in a rugged metal NEMA-4 case with the display visible from the front and the controls accessible from inside the front door. See Figure 1-1. The front door has a clear Lexan window for viewing the sample system components and trans[...]

Teledyne Analytical Instruments 1 Introduction Model OT-2 System 1-4[...]

2-1 Teledyne Analytical Instruments Model OT-2 System Operational Theory 2 2. 1 Introduction The OT-2 System is composed of three subsystems: 1 . Micro-Fuel Cell Sensor 2 . Electronic Signal Processing, Display and Control 3 . Sample System The Micro-Fuel Cell is an electrochemical galvanic device that translates the amount of oxygen present in the[...]

Teledyne Analytical Instruments 2-2 2 Operational Theory Model OT-2 System 2. 2 Micro-Fuel Cell Sensor 2.2.1 Principles of Operation The oxygen sensor used in the Model OT-2 System is a Micro- fuel Cell designed and manufactured by Analytical Instruments. It is a sealed plastic disposable electrochemical transducer. The key components of the Micro-[...]

2-3 Teledyne Analytical Instruments Model OT-2 System Operational Theory 2 Refer to Figure 2-2, Cross Section of a Micro-Fuel Cell , which illustrates the following internal description. Figure 2-2. Cross Section of a Micro-Fuel Cell (not to scale) At the top end of the cell is a diffusion membrane of Teflon. Beneath the diffusion membrane lies the[...]

Teledyne Analytical Instruments 2-4 2 Operational Theory Model OT-2 System Warning:The sensor used in the Model OT-2 System uses electro- lytes which contain substances that are 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 harmfu[...]

2-5 Teledyne Analytical Instruments Model OT-2 System Operational Theory 2 2.2.4 The Effect of Pressure The Micro-Fuel Cell responds to the partial pressure of oxygen present inside the cell holder. By design, the total gas pressure inside the cell holder is kept approximately the same as the atmospheric pressure. As the atmospheric pressure change[...]

Teledyne Analytical Instruments 2-6 2 Operational Theory Model OT-2 System 2.2.5 Calibration Characteristics Given that the total pressure of the sample gas on the surface of the Micro-Fuel Cell input is constant, a convenient characteris- tic of the cell is that the current produced in an external circuit is directly proportional to the rate at wh[...]

2-7 Teledyne Analytical Instruments Model OT-2 System Operational Theory 2 2. 3 Electronics and Signal Processing The OT-2 circuitry consists of three stages: an input stage, a temperature compensation/gain stage and an output stage. The input stage consists of a current to voltage converter producing a voltage signal that is proportional to the ox[...]

Teledyne Analytical Instruments 2-8 2 Operational Theory Model OT-2 System 2. 6 Sample System The system consists of a shut off valve, particulate filter, pres- sure regulator, scrubber, calibration selector valve, flow control valve, O 2 transmitter and a sample flow meter and incorporates ¼ inch tube fittings for sample inlet and outlet connecti[...]

2-9 Teledyne Analytical Instruments Model OT-2 System Operational Theory 2 Figure 2-5 Piping Layout Figure 2-5 is the Piping Layout of the sampling system. In the standard instrument, calibration gases (zero and span) are con- nected directly to the Span Gas In port by teeing to the port with appropriate valves. The sample gas is connected to the S[...]

Teledyne Analytical Instruments 2-10 2 Operational Theory Model OT-2 System[...]

Model OT-2 System Operation 3 3-1 Teledyne Analytical Instruments Operation Operation of the Model OT-2 System involves installing the unit, making appropriate sample gas connections, and calibration. 3.1 Installation WARNING: Safe operation of the system requires the user to properly ground the system, install the wiring and power the transmitter.[...]

3 Operation Model OT-2 System 3-2 Teledyne Analytical Instruments 3.1.2 Mo unting the Analyzer The OT-2 System is designed for bulkhead mounting. Figure 3-1 is an illustration of the OT-2 System and mounting hole dimensions. There are four mounting holes — one in each of the inside corners of the rigid enclosure. Figure 3-1 Mounting Details[...]

Model OT-2 System Operation 3 3-3 Teledyne Analytical Instruments All operator controls are located inside the system enclosure, which is hinged on the left edge and provides easy access to the transmitter, sensor and cell block inside the instrument. The main enclosure door will swing open when the slotted latch at the right center of the door is [...]

3 Operation Model OT-2 System 3-4 Teledyne Analytical Instruments To connect gas lines to the Model OT-2 System: 1 . Insert the tube into the tube fitting, and finger-tighten the nut until the tubing cannot be rotated freely, by hand, in the fitting. (This may require an additional 1/8 turn beyond finger-tight.) 2 . Hold the fitting body steady wit[...]

Model OT-2 System Operation 3 3-5 Teledyne Analytical Instruments Figure 3-3 Front View of Transmitter System Power Requirements: The Model OT-2 System requires a 12 VDC (nominal), reverse polarity protected power source. Observe good wiring practices. For hazardous area applications, the Model OT-2 System must be pow- ered by a source that is cons[...]

3 Operation Model OT-2 System 3-6 Teledyne Analytical Instruments 3 . 2 Installing the Micro-Fuel Cell The Micro-Fuel Cell is not installed in the cell block when the instrument is shipped. Install it before the analyzer is placed in service. When the micro-Fuel Cell needs to be installed or replaced, follow the procedures in chapter 5, Maintenance[...]

Model OT-2 System Operation 3 3-7 Teledyne Analytical Instruments The span gas cylinder must be equipped with a pressure regulator with a metallic diaphragm. The regulator should be set to approximately 3-5 psig. Rotate the selector valve (a) to the span position and observe the flow meter (b) which should indicate a flow of about 0.4 scfh. For cal[...]

3 Operation Model OT-2 System 3-8 Teledyne Analytical Instruments NOTE: This procedure is more critical on the 0-10 ppm range and less critical on the 0-100 or 0-1000 ppm range. 3.3.2 Setting the Span Pot 1. Switch the system from zero gas to span gas and allow time for stabilization. Figure 3-6: Span Pot Location NOTE: The span gas should have an [...]

Model OT-2 System Operation 3 3-9 Teledyne Analytical Instruments 3.3.3 H 2 S Scrubber The life expectancy of the stainless steel H 2 S scrubber, in- cluded in this system, is determined by the amount of H 2 S passing through it. With the maximum concentration of 200 PPM H 2 S and a flow rate of 0.2 scfh the expected scrubber life will be over 6 mo[...]

3 Operation Model OT-2 System 3-10 Teledyne Analytical Instruments[...]

4-1 Teledyne Analytical Instruments Model OT-2 System Maintenance 4 Maintenance 4. 1 Routine Maintenance Aside from normal cleaning and checking for leaks at the gas connections, routine maintenance includes servicing the filter, the scrubber, installing replacement Micro-Fuel cells and recalibration. For recalibration, see section 3.3 Calibration [...]

Teledyne Analytical Instruments 4-2 4 Maintenance 4 Maintenance 4 Maintenance 4 Maintenance 4 Maintenance Model OT-2 System To replace the cell: Figure 4-1 1 . Open the enclosure door. 2 . Undo the velcro straps. 3 . Remove the insulation. 4 . The cell block is located in the center of the unit. Unscrew the cap on the bottom of the cell block. The [...]

4-3 Teledyne Analytical Instruments Model OT-2 System Maintenance 4 4 . Place the new cell on the cap with the sensing surface face down and the gold contact rings up. 5 . Position the cell and cap so that the cell is inside the cell block. Press up on the cap and rotate. Tighten the cap screws. 4.2.1 Ce l l Warranty The cell warranty is sensor spe[...]

Teledyne Analytical Instruments 4-4 4 Maintenance 4 Maintenance 4 Maintenance 4 Maintenance 4 Maintenance Model OT-2 System[...]

A-1 Teledyne Analytical Instruments Model OT-2 System Appendix Appendix Specifications: System Enclosure: NEMA 4 Rated, bulkhead mounted Power Requirements: 9-16 VDC and 16-275mA. Ranges: 0 – 10ppm and 0 – 100ppm Oxygen or 0-100 ppm and 0-1000 ppm O 2 . Accuracy: ± 2% of full scale at constant temperature and pressure (temperature and pressure[...]

Teledyne Analytical Instruments A-2 Appendix Appendix Appendix Appendix Appendix Model OT-2 System Recommended Spare Parts List Qty. Part Number Description 1 C71345A & C71345B Cell Block Insulation Set 1 C70976B PC Board — 1-5V Transmitter (0-100/0-1000 ppm) 1 C70976A PC Board — 1-5V Transmitter (0-10/0-100 ppm) 1 B71343 Scrubber Assembly [...]

A-3 Teledyne Analytical Instruments Model OT-2 System Appendix Material Safety Data Sheet Material Safety Data Sheet Material Safety Data Sheet Material Safety Data Sheet Material Safety Data Sheet Section II – Physical and Chemical Data Section I – Product Identification Product Name: Micro-Fuel Cells Mini-Micro-Fuel Cells, all classes Super C[...]

Teledyne Analytical Instruments A-4 Appendix Appendix Appendix Appendix Appendix Model OT-2 System Section III – Physical Hazards Primary route of entry: Ingestion, eye/skin contact Exposure limits: OSHA PEL: .05 mg./cu.m. (Pb) ACGIH TLV: 2 mg./cu.m. (KOH) Effects of overexposure Ingestion: The electrolyte could be harmful or fatal if swallowed. [...]

A-5 Teledyne Analytical Instruments Model OT-2 System Appendix NO TE : The oxygen sensors are sealed, and under normal circumstances, the contents of the sensors do not present a health hazard. The following information is given as a guide in the event that a cell leaks. Protective clothing: Rubber gloves, chemical splash goggles. Cleanup procedure[...]

Teledyne Analytical Instruments A-6 Appendix Appendix Appendix Appendix Appendix Model OT-2 System[...]