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Teledyne 4060 manual Measuring Circuit Electrical Checks, Anode Voltage Check

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5.1 Measuring Circuit Electrical Checks

Maintenance	Series 4060

attempt to evaluate performance on sample gas. If analyzer sensitivity is questionable, use the span gas. For all other evaluations, use the zero gas and low range for maximum sensitivity. The important consideration is to control as many variables as possible. Using cylinder-supplied gases of known hydrocarbon content eliminates the possibility of introducing an unknown variable.

Do not overlook the seemingly obvious. Check to see that power is available for the instrument (and of the proper voltage, etc.), and that connections are correct. Also verify that support/calibration gases are not depleted.

5.1 Measuring Circuit Electrical Checks

If the analyzer performs erratically on span gas, the trouble can be related to either the integral gas control systems, or the electronics. To isolate the problem, the two systems must be separated. To isolate the electronics, employ the following procedure:

Open the door to the analyzer, remove and disconnect the collector cable from the sensor leaving it attached to the electrometer board. (Consult schematic and assembly drawings for circuitry and location). With this cable disconnected, the electronic circuitry is completely isolated from the gas control system and cell.

5.1.1Anode Voltage Check

If the output can be adjusted by the zero control (the above section, step 2), the cell anode voltage should be verified as follows:

WARNING: THESE PROCEDURES SHOULD BE CARIED OUT ONLY BY PERSONNEL FAMILIAR WITH HIGH VOLTAGE CIRCUIT BOARDS. THE ANODE-IGNITER UNIT AND ASSOCIATE CIRCUITRY INVOLVE DANGEROUSLY HIGH VOLTAGES.

Refer to the cell wiring diagram. Using a voltmeter set to measure

125 VDC, check the voltage on either of the anode-igniter electrodes, as follows:

1.Connect the negative voltmeter lead to ground and the positive lead to either electrode. Be careful not to short the circuit by touching both an electrode and the cell body simultaneously. The reading obtained should be 125±10 VDC.

66	Teledyne Analytical Instruments

Image 66

Teledyne 4060 manual Measuring Circuit Electrical Checks, Anode Voltage Check

Contents

SERIES DANGERINSTRUCTION, OPERATING AND MAINTENANCE MANUAL FOR P/N M76417 DATE 06/29/10Teledyne Analytical Instruments WarrantySeries 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 Figure 2-2 Typical Piping Diagram for the Model List of FiguresFigure 2-1 Internal Temperature Controllers Figure 3-2 Equipment Interface Connector Pin ArrangementTable 3-7 Pin out of 50 pin D-Sub Connector List of TablesTable 3-4 Alarm Relay Contact Pins Table 3-8 Commands via RS-232 Input1.1 Main Features of the Analyzer Introduction1.2 Principle of Operation 1.3 Analyzer DescriptionSeries Figure 1-1 Model 4060 Front Panel InterfaceFigure 1-2 Model 4060 Rear Panel 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 CellOperational Theory Figure 2-2 Typical Piping Diagram for the ModelSeries 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 RangePin Function Table 3-1 Analog Output ConnectionsTable 3-2 Analog Concentration Output-Example 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 ANY CIRCUMSTANCES USE WATER PUMPED AIR WITH THC LESS THAN0.1 PPM. DO NOT USE OIL PUMPED AIR UNDER FUEL3.4 Placing the System in Operation Operation 4.1 Equipment4.2 Preliminary Power-Off Check List 4.3 Activating the Support Gases4.3.2 Carrier Gas 4.4 Flame Ignition4.3.1 Air 4.3.3 Span Gas4.4.1 Verification of the Flame Guard Circuit 4.5 Sample Pump4.6 Analyzer Operation 4.4.2 Ignition and/or Flame Guard Circuit FailureCaution ALARM SUPPRESSION Alarms Refer to the Addendum and Testing4.6.1 Default Parameters Password4.6.3 Navigation and Data Entry Example Analysis Mode or SetupMode 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 4.6.6 ALT-SPAN Note The self diagnostics will interrupt analysis temporarily4.6.8 System Self-Diagnostic Test 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 Range Select Man Man Rng R1 R1 0-100.00ppb R2 0- 1.00ppm 4.6.11 Analog Output Adjustment4.6.10 The Range Function R3 0- 10.00ppm4.6.12 Linearization Note Before setting up an AUTOCAL, be sure you understand4.6.14 Setting up an AUTO-CAL 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