Teledyne 402REU - Hydrocarbon analyzer - Manual (Page 7)

1-1 Teledyne Analytical Instruments
Total Hydrocarbon Analyzer Introduction
Introduction
The Teledyne Electronic Technologies/Analytical Instruments
(TET/AI) Model 402R-EU Total Hydrocarbon Analyzer meets or exceeds
all of the requirements of the Commonwealth of Europe (CE) for Radio
Frequency Interference and Electromagnetic Interference (RFI/EMI)
protection and Low Voltage Directive (LVD). The analyzer is designed to
measure the quantity of hydrocarbons present in a positive pressure sample
as equivalent methane.
1.1 Principle of Operation
The sample gas is mixed with a fuel (normally a composition of
hydrogen and nitrogen) and burned in an atmosphere of “blanket air”. The
ions formed in the burning process cause an electrical conduction between
two electrodes in the combustion chamber (or detector cell) that is ampli-
fied by a highly sensitive electrometer-amplifier circuit. The electrical
output of the electrometer-amplifier is directly proportional to the quantity
of flame ionizable hydrocarbons present, and is linear over the range of
0-10,000 PPM methane.
1.2 Analyzer Description
The information contained in this manual describes individual analyz-
ers of the Model 402R-EU standard series. In cases of special design, other
factors may apply requiring additional or supplementary information.
These special considerations will be described in detail on specific applica-
tion pages labelled Addenda, in each manual. When the Model 402R-EU is
a part of a larger system, it is subordinate to that system, and specific
installation and operation conditions of that system will apply. Consult
system sections of the manuals for those applications, where conditions
specific to those systems will be detailed.