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Teledyne 4060 manual Detection Cell

Models: 4060

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2.4 Detection Cell

Operational Theory	Series 4060

2.4 Detection Cell

The upper section of the stainless steel flame ionization cell houses the cylindrical collector electrode, the high voltage (+260 VDC) anode- igniter coil, and the sensing thermistor of the flame guard circuit (see cell cross-section in Figure 2-3).

WARNING: DANGEROUS HIGH VOLTAGE EXISTS AT THE ANODE IGNITER COIL (+260 VDC). DO NOT ATTEMPT TO DISCONNECT THE IGNITER COIL CABLE OR DISASSEMBLE ANY OF THE FLAME IONIZATION CELL COMPONENTS WITHOUT TURNING OFF THE POWER AND DISCONNECTING THE POWER CORD.

The collector is interconnected with the electrometer-amplifier PC board by a coaxial cable. Although the cable and fittings are intended for coaxial service, the cable is actually being used as a shielded single- conductor connection.

The anode-igniter, as its name implies, serves two functions. When relay K2 at PCB part number B74671 is energized, the coil becomes an electrical heating element that glows red-hot and ignites the hydrogen fuel. When relay K2 at B74671 is de-energized, the coil is connected to the +260 volt DC terminal of the anode-flame guard power supply PC board. In this configuration, the necessary potential difference is established between the coil (anode) and collector to promote ionization of the burned hydrocarbons. The coil functions as the high voltage anode in all three-range positions of the selector switch.

The thermistor acts as the sensor in the flame guard circuit. Its ambient temperature resistance is in the 100 K ohms region. When the flame is ignited, its resistance is reduced by a factor of 100. The thermistor is coupled to a semiconductor control circuit on the anode- flame guard power supply PC board, which will be described in a following section.

The cell electrodes of both the anode-igniter and flame guard thermistor are connected to the electronics chassis by means of a plug-in cable.

The electrode section of the cell may be removed for inspection by turning off the power, disconnecting the electrode lead plug, and removing the screws, which retain the electrode assembly in the sensor body.

24	Teledyne Analytical Instruments

Image 24

Teledyne 4060 manual Detection Cell

Contents

DANGER INSTRUCTION, OPERATING AND MAINTENANCE MANUAL FORSERIES P/N M76417 DATE 06/29/10Warranty SeriesTeledyne Analytical Instruments Copyright 2010 Teledyne Analytical InstrumentsSafety Messages No SymbolThis manual provides information designed to guide you through the installation, calibration and operation of your new analyzer. Please read this manual and keep it available Additional Safety Information COMBUSTIBLE GAS USAGEDANGER Always purge the entire system before performing any maintenance and always leak check the system after removing any tubing or fittings on the sample system. See the procedures for purging and leak checking this instrument on the following pages Procedure for Removal of Internal Inaccessible Shock Hazards READ THIS MANUAL BEFORE OPERATING THE INSTRUMENT AND ADHERE TO ALL WARNINGS INCLUDED IN THIS MANUALTable of Contents 3.3 User Connections 4.5 Sample Pump 5.1.4 Collector Cable List of Figures Figure 2-1 Internal Temperature ControllersFigure 2-2 Typical Piping Diagram for the Model Figure 3-2 Equipment Interface Connector Pin ArrangementList of Tables Table 3-4 Alarm Relay Contact PinsTable 3-7 Pin out of 50 pin D-Sub Connector Table 3-8 Commands via RS-232 Input1.1 Main Features of the Analyzer Introduction1.2 Principle of Operation 1.3 Analyzer DescriptionFigure 1-1 Model 4060 Front Panel Interface Figure 1-2 Model 4060 Rear PanelSeries Introduction1.4 Applications  Gas purity certification  Detecting trace benzene in ambient air Detecting atmospheric pollutants Operational Theory 2.1 Introduction2.2 Modes of Operation 2.3 Analyzer Subsystems 2.3.1 Sample SystemFigure 2-1 Internal Temperature Controllers 2.3.2 Gas Flow Control System2.3.3 Fuel and Blanket Air Systems 2.3.4 Flame Ionization Detection CellFigure 2-2 Typical Piping Diagram for the Model SeriesOperational Theory Teledyne Analytical Instruments2.4 Detection Cell Figure 2-3 Flame Ionization Cell 2.4.1 Electrometer-Amplifier2.4.2 Anode Power Supply 2.4.3 Flame Guard Circuit2.4.4 Flame Ignition Circuit Installation 3.1 Unpacking the Analyzer3.2 Mounting the Analyzer 3.3 User Connections 3.3.1 Electrical Power Connections3.3.2 Electronic Connections Figure 3-1 Model 4060 Rear Panel with Optional Gas Manifold 3.3.2.1 PRIMARY INPUT POWERFigure 3-2 Equipment Interface Connector Pin Arrangement 0-1 VDC % of RangeTable 3-1 Analog Output Connections Table 3-2 Analog Concentration Output-ExamplePin Function ExamplesTable 3-3 Analog Range ID Output-Example Threshold AlarmTable 3-4 Alarm Relay Contact Pins Table 3-5 Remote Calibration Connections For exampleTable 3-6 Range ID Relay Connections 2. When the CRC closes, remove the span commandTable 3-7 Pin out of 50 pin D-Sub Connector 3.3.2.10 RS-232 PORTTable 3-8 Commands via RS-232 Input Table 3-9 Required RS-232 Options3.3.3 Gas Connections Figure 3-3 Gas Connections USE WATER PUMPED AIR WITH THC LESS THAN 0.1 PPM. DO NOT USE OIL PUMPED AIR UNDERANY CIRCUMSTANCES FUEL3.4 Placing the System in Operation Operation 4.1 Equipment4.2 Preliminary Power-Off Check List 4.3 Activating the Support Gases4.4 Flame Ignition 4.3.1 Air4.3.2 Carrier Gas 4.3.3 Span Gas4.5 Sample Pump 4.6 Analyzer Operation4.4.1 Verification of the Flame Guard Circuit 4.4.2 Ignition and/or Flame Guard Circuit FailureCaution ALARM SUPPRESSION Refer to the Addendum and Testing 4.6.1 Default ParametersAlarms PasswordExample Analysis Mode or Setup Mode4.6.3 Navigation and Data Entry 4.6.3.2 ENTER4.6.3.3 ESCAPE 4.6.4 Menu Structure3. MODIFIABLE ITEM screens have a flashing value somewhere in the line 4.6.5 Span Note The self diagnostics will interrupt analysis temporarily 4.6.8 System Self-Diagnostic Test4.6.6 ALT-SPAN 4.6.7 The Model Screen4.6.9 The Alarms Function AL-1 DEFEATED AL-1 HIGH AL-1 NON-FAILSAFE AL-1 NON-LATCHING AL-1 20.00 ppb AL-2 ACTIVE AL-2 LOW AL-2 FAILSAFE AL-2 LATCHINGAL-2 50.00 ppb RELEASING A LATCHED ALARM When alarm conditions are present, the main analysis screen will have one or both of the following messages AL-1, AL-2 followed by the instruction ENT/ACK . Pressing ENTER will release a latched alarm. That is, if there will not be an alarm condition until the analysis concentration is again violating the trip point. Furthermore, the alarms will be suppressed until the analysis value is updated, so even though the screen may be reporting a value that should cause an alarm, until the analyzer again enters SAMPLE MODE, no alarm condition will reoccur 4.6.11 Analog Output Adjustment 4.6.10 The Range FunctionRange Select Man Man Rng R1 R1 0-100.00ppb R2 0- 1.00ppm R3 0- 10.00ppmNote Before setting up an AUTOCAL, be sure you understand 4.6.14 Setting up an AUTO-CAL4.6.12 Linearization 4.6.13 Changing StreamAUTOCAL PASSWORD AS3d 20h AUTO SPAN Enabled Span in 11 days Span in 6 hours4.6.16 Group Setup 4.6.17 Password Protection4.6.15 Timing ENTERING A PASSWORD PASSWORDENTER PASSWORD SCREEN CHANGE PASSWORD SCREENENTER NEW PASSWORD SCREEN REPEAT PASSWORD ENTRY SCREEN 4.6.18 Logging OutRestrict Access? ENTER=Yes ESCAPE=NO 4.6.19 StandbyEnter Pressing Enter places the instrument in STANDBY Operation SeriesTeledyne Analytical Instruments Maintenance & Troubleshooting Work with one hand only5.1 Measuring Circuit Electrical Checks 5.1.1 Anode Voltage Check5.1.3 Printed Circuit Board Replacement 5.1.2 Electronic Stability5.2 Temperature Control Electronic Check 5.1.4 Collector Cable5.3 Ignition and/or Flame Guard Circuit Checks 5.4 Sampling System 5.5 Printed Circuit Board Descriptions 5.5.1 Flame Guard and Anode Power Supply PCB5.5.2 Proportional Temperature Controller PCB 5.5.3 Electrometer-Amplifier PCB The stability of the electrometer circuit can be tested as follows A.1 Specifications and Initial Settings AppendixA.2 Recommended Spare Parts List Analytical InstrumentsA.3 Drawing List PC Board AssembliesAppendix SeriesTeledyne Analytical Instruments B1 Addendum and Testing Results Appendix B