TeledyneメーカーOT-3の使用説明書/サービス説明書
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Trace Oxygen Analyzer Teledyne Analytical Instru ments i OPER ATING INSTRUCTIONS FOR MODEL OT-3 MODEL OT-3 Trace Oxygen Analyzer DANGER Toxic gases and or flammable liquids may be present in this monitoring system. Personal protective equipment may be required when servicing this instrument.
Model OT-3 Teledyne Analytical Instruments ii Copyright © 2000 Teledyne Analytical Instruments All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a ret.
Trace Oxygen Analyzer Teledyne Analytical Instru ments iii Specific Model Information The instrument for which this manual was supplied may incorporate one or more options not supplied in the standard instrument. Commonly available options are listed below, with check boxes.
Model OT-3 Teledyne Analytical Instruments iv Important Notice Model OT-3 complies with all of the requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference, Electromagnetic Interference (RFI/EMI), and Low Voltage Directive (LVD).
Trace Oxygen Analyzer Teledyne Analytical Instru ments v This instrument is designed for CL1 DIV II hazardous locations. It is the customer's responsibility to ensure safety especially when combustible gases are being analyzed since the potential of gas leaks always exist.
Model OT-3 Teledyne Analytical Instruments vi Table of Contents List of Figures ............................................................................. viii Introduction ...........................................................................
Trace Oxygen Analyzer Teledyne Analytical Instru ments vii 3.4 Gas Connections 18 3.5 Sample System 20 3.6 Installation Checklist 21 Operation ...................................................................................... 23 4.1 Introduction 23 4.
Model OT-3 Teledyne Analytical Instruments viii List of Figures Figure 1-1: Front Panel ................................................................... 3 Figure 1-2: Rear Panel (AC Version) .............................................. 5 Figure 1-3: Rear Panel (DC Version) .
Trace Oxygen Analyzer Introduction Teledyne Analytical Instruments 1 Introduction 1.1 Overview The Teledyne Electronic Technologies Analytical Instruments (TET/AI) Model OT-3 is a microprocessor-based trace oxygen analyzer for real-time measurement of the parts per million of oxygen in inert gases, or in a wide variety of gas mixtures.
Introduction OT-3 Teledyne Analytical Instruments 2 The Model 3300/OT-3 Control Unit has its own long list of features including: • Keypad lockout feature • Two user settable fail-safe alarms (with a user settable 0-20 min. time delay ) • Two user settable ranges (from 0-10PPM – 0-9999PPM) with user selectable auto-ranging .
Trace Oxygen Analyzer Introduction Teledyne Analytical Instruments 3 Figure 1-1: Front Panel Function Keys: Seven push-button membrane switches are used to select the function performed by the analyzer: Set Alarm 1: Set Alarm 1 Hi or Low, and the concentration at which alarm 1 activates.
Introduction OT-3 Teledyne Analytical Instruments 4 Meter Readout: As the meter readout, it displays the oxygen concentration currently being measured. Measurement Parameters Readout: It also displays user-definable alarm setpoints, ranges, and span calibration point when they are being checked or changed.
Trace Oxygen Analyzer Introduction Teledyne Analytical Instruments 5 Figure 1-2: Rear Panel (AC Version) Figure 1-3: Rear Panel (DC Version).
Installation OT-3 Teledyne Analytical Instruments 6 Operational Theory 2.1 Introduction The analyzer is composed of two subsystems: • 3300/OT-3 control unit • OT-3 sample sys. The OT-3 sample system is designed to accept the sample gas and direct it to the sensitive surface of the Micro-fuel Cell sensor.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 7 between a battery and a true 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 made of extremely inert plastic (which can be placed confidently in practically any environment or sample stream).
Installation OT-3 Teledyne Analytical Instruments 8 electrical circuitry, to one of the external contacts in the connector receptacle, which is on the top of the cell. 2.2.3 Electrochemical Reactions The sample gas diffuses through the Teflon membrane .
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 9 2.2.4 The Effect of Pressure In order to state the amount of oxygen present in the sample as a percentage of the gas mixture, it is necessary that the sample diffuse into the cell under constant pressure.
Installation OT-3 Teledyne Analytical Instruments 10 Figure 2-2: Characteristic MFC Input/Output Curve 2.3 Electronics 2.3.1 General The signal processing uses an Intel microcontroller with on-board RAM and ROM to control all signal processing , input/output, and display functions for the analyzer.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 11 2.3.2 Signal Processing Figure 2-3 is a block diagram of the signal processing electronics described below. Figure 2-3: Block Diagram of the Signal Processing Electronics In the presence of oxygen the cell generates a current .
Installation OT-3 Teledyne Analytical Instruments 12 The same digital information is also sent to a 12-bit digital to analog converter (DAC) that produces the 0-10 V dc analog concentration signal and the 0-10 VDC analog range ID output. A voltage to current converter (E–I CONV) produces the 4-20 mA DC analog concentration signal.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 13 Installation Installation of the analyzer includes: • Unpacking the system. • Installing the Micro-fuel Cell • Making the electrical connections. • Making the gas connections.
Installation OT-3 Teledyne Analytical Instruments 14 CAUTION: DO NOT DIST URB THE INTEGRITY OF THE CELL PACKAGE UNTIL THE CELL IS TO ACTUALLY BE USED. IF THE CELL PACKAGE IS PUNCTURED AND AIR IS PERMITTED TO ENTER, CELL-LIFE WILL BE COMPROMISED.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 15 Figure 3-1: Electrical Connectors for AC Control Unit 3.3.1 Primary Input Power A detachable power cord is installed directly into the Control Unit and connects to a three pin terminal block on the rear panel.
Installation OT-3 Teledyne Analytical Instruments 16 • 4–20 mA % Range: Current increases with increasing oxygen concentration, from 4 mA at 0 percent oxygen to 20 mA at full scale percent oxygen. (Full scale = 100% of programmed range.) • SSR POWER (AC units only): Provides 15vdc at 698 ohm impedance to power external Solid State Relays.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 17 The specific descriptions for each type of alarm are as follows: Power Fail Alarm: This alarm changes state when the AC or DC system power is lost. Alarm #1: Programmable as high or low alarm (actuates when concentration is above threshold).
Installation OT-3 Teledyne Analytical Instruments 18 any unknown power source, or any load or device that may exceed the safe use ratings for Cl 1 Div 2 Group C & D as listed above.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 19 • Vent connection • Coalescing filter drain Note: Zero gas is not required however, see Section 5.2.1. Figure 3-3: Gas Connections To connect the gas lines, remove the fitting and ferrule and cone at the bottom panel.
Installation OT-3 Teledyne Analytical Instruments 20 The vent line must be installed in a manner which will prevent dirt and water from accumulating within the line. It must return sample to atmospheric pressure. The vent line should be 1/4 ” diameter tubing or larger and be at least 24 ” long.
Trace Oxygen Analyzer Installation Teledyne Analytical Instruments 21 A flowmeter and flow restrictor are parts of the sample system and assist in setting the flow of the gas. The restrictor is installed upstream of the analyzer while the flowmeter is installed on the vent side.
Installation OT-3 Teledyne Analytical Instruments 22.
Trace Oxygen Analyzer Operation Teledyne Analytical Instruments 23 Operation 4.1 Introduction Once the analyzer has been mounted, the gas lines connected and the electrical connections made, the Analyzer can be configured for your application. This involves setting the system parameters: • Defining the user selectable analysis ranges.
Operation OT-3 Teledyne Analytical Instruments 24 4.2 Using the Function and Data Entry Buttons When no buttons on the Analyzer are being pressed, the instrument is in the Analyze mode. It is monitoring the amount of oxygen in the sample gas that is flowing through the sampling system.
Trace Oxygen Analyzer Operation Teledyne Analytical Instruments 25 4.3.1 HI Range Setting the HI Range full-scale value defines the LEAST sensitive analysis range to be used.
Operation OT-3 Teledyne Analytical Instruments 26 until the display reads the desired percent concentration. (if within 5 seconds no key is pressed, the instrument will return to the sample mode and display oxygen concentration).
Trace Oxygen Analyzer Operation Teledyne Analytical Instruments 27 When the alarms are set for delay and an alarm condition exists, the display will alternate between the O 2 reading and the time in minutes and seconds before the alarm will trigger. The alarm indicator on the front panel will blink on and off.
Operation OT-3 Teledyne Analytical Instruments 28 will cause the display to flash NO PASS and the keys will have no effect. 4. To unlock the keypad, repeat steps 1 and 2.
Trace Oxygen Analyzer Operation Teledyne Analytical Instruments 29 Note: If the analyzer output goes above the high alarm setpoint or below the low alarm setpoint, the display will go blank and the front panel ALARM Indicator, beneath the SET Function buttons, will blink.
Operation OT-3 Teledyne Analytical Instruments 30 OR ALARM BUTTONS ARE PRESSED DURING SPAN. THIS MAY RESULT IN FALSE ALARMS IF THE SPAN GAS HAS NOT BEEN FULLY PURGED FROM THE CELL AND SAMPLE LINES.
Trace Oxygen Analyzer Maintenance Teledyne Analytical Instruments 31 Maintenance Aside from normal cleaning and checking for leaks at the gas connections, the Model OT-3 should not require any maintenance beyond replacement of expended Micro-fuel Cells, and perhaps a blown fuse.
Maintenance OT-3 Teledyne Analytical Instruments 32 Figure 5-1: AC Fuse Replacement DC Units On DC units, the fuse is located in a fuse holder on the rear panel. See Figure 1-3. Unscrew the cap on the fuse holder and remove the blown fuse. Replace the fuse with a 1/2 A micro fuse P/N F91.
Trace Oxygen Analyzer Maintenance Teledyne Analytical Instruments 33 CAUTION: READ THE SE CTION CELL WARRANTY CONDITIONS , BELOW, BEFORE REPLACING THE CELL. After replacing the Micro-fuel Cell, the analyzer must be recalibrated. See Calibration in Chapter 4.
Maintenance OT-3 Teledyne Analytical Instruments 34 2. Open the analyzer door. 3. Unscrew the cell-retainer cap from the cell block by turning it counterclockwise until it is free. 4. Withdraw the cap from the block. The cell should come out with the cap .
Trace Oxygen Analyzer Maintenance Teledyne Analytical Instruments 35 5.2.5 Cell Warranty Conditions The B-2C , A-2C, and Insta-Trace Class Micro-fuel Cells are used in the Model OT-3. These cells are warranted for 6 months, with an expected life of 8 months from the date of shipment (under specified operating conditions—see Appendix).
Appendix OT-3 Teledyne Analytical Instruments 36 Appendix A.1 Specifications Ranges : Two user selectable ranges can be set between 0-10 ppm and 0-9999 ppm oxygen, and a 0-25 % (nominal) Air Calibration Range. Signal Output : Voltage: 0–10 VDC, negative ground Current: 4-20 mA, negative groun d Range ID: 0-10 VDC.
Trace Oxygen Analyzer Appendix Teledyne Analytical Instruments 37 A.2 Spare Parts List QTY P/N DESCRIPTION 1 C65220-A PC Board, Main (s td.) 1 C70740-A PC Board, Power Supply AC (std.
Appendix OT-3 Teledyne Analytical Instruments 38 A.3 Reference Drawing D-74110 Outline Diagram B-74106 Piping Diagram D-65305 Schematic main PCB D-70739 Schematic AC Power Supply PCB D-74161 Schematic DC Power Supply PCB B-74224 Wiring diagram 3300/OT-3 ext.
Trace Oxygen Analyzer Index Teledyne Analytical Instruments 39 Index accuracy, 2, 36 address. See company address alarm connection, 16 delay, 26 HI, 16 LO, 16 power failure, 2, 26 SET ALARM 1, 25 SET .
Index OT-3 Teledyne Analytical Instruments 40 international power, 10 jumper, 18 keypad lockout, 2, 27 lead, 7, 8 linear curve, 9 LO Range, 25 location, 14 maintenance, 31 manuals, additional, v membr.
Trace Oxygen Analyzer Index Teledyne Analytical Instruments 41 terminal block, 14, 15 thermistor, 11 universal power supply. See power supply module VAC symbol, 38 vent, 19, 20 voltage amplifier, 11 v.
Index OT-3 Teledyne Analytical Instruments 42.
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