Teledyne 238 - Thermal conductivity analyzer - Manual (Page 3)

i i i Teledyne Analytical Instruments
Thermal Conductivity Analyzer
Table of Contents
1 Introduction (Models 235, 236, 237, 238)
1.1 Electronic Circuitry ...................................................... 1-2
1.2 Plug-in Circuit Boards .................................................. 1-3
1.2.1 T.C. Cell Power Supply/Amplifier Board ........... 1-3
1.2.2 Differential Power Supply Board ....................... 1-3
1.2.3 Alarm Comparator Board (optional) .................. 1-3
1.2.4 E to I Converter Board (optional) ...................... 1-3
1.2.5 Linearizer Board (optional) ............................... 1-4
1.2.6 220 to 240 Volt Operation (optional) ................... 1-4
2 Installation
2.1 Location ....................................................................... 2-1
2.2 Electrical Connections ................................................. 2-1
2.3 Gas Connections ......................................................... 2-2
2.3.1 Reference and Zero Gas .................................. 2-2
2.3.2 Vent Lines ........................................................ 2-2
2.4 Pressure Regulation .................................................... 2-3
2.5 Accessory Sample System Components .................... 2-4
2.6 Recommended Flowmeter Readings .......................... 2-5
3 Operation
3. 1 Preliminary .................................................................. 3-1
3.2
Gas Flowrate ............................................................... 3-1
3.3 Zero Standardization ................................................... 3-1
3.4 Span standardization .................................................. 3-2
3.5 Onstream Operation .................................................... 3-2
3.6 Normal Operation ........................................................ 3-3
3.7 Maintenance ................................................................ 3-3
4 Linearizer
4.1 Theory of Operation .................................................... 4-1
4.2 Output Signal Reversal ............................................... 4-3
Appendix
Spare Parts List ................................................................... A-1
Calibration Data ................................................................... A-2
Drawing Package ................................................................. A-3