Teledyne 4030 - Total Hydrocarbon gas analyzer - Manual (Page 11)

Introduction
Teledyne Analytical Instruments 9
on the customer’s requirements. The appropriate power cord for your
unit has been shipped with this instrument.
1.4 Applications
. Monitoring the ambient air for Total Hydrocarbons in chemical and
petrochemical plants.
. Fugitive emission monitoring.
. Process emission gases in the chemical industry.
2.1 Introduction
Using a built-in pump, the heated Sample from the Sample Selector
Unit is brought to the heated SAMPLE CHAMBER of Model 4030,
housing filter cartridge, switching valve and sample loops. Using
nitrogen carrier gas and the microprocessor actuated switching valve, a
fixed volume of sample, which is collected in Sample Loop, is pushed
into the FID detector.
Series 4030 uses a Flame Ionization Detector to sense hydrocarbons.
The FID was selected based on the positive performance and extensive
experience in the use of this detector in other Teledyne analyzers namely
Model 402R and Model 4020. The FID has proven itself to be a rugged,
stable, long life sensor giving years of trouble free operation in various
applications.
Typically, Model 4030 is calibrated using a known mixture of
methane in air, and thus the THC is shown as equivalent ppm methane
concentration.
A separate SAMPLE SELECTOR MODULE Unit (optional) may be
provided with a heated chamber (120 C Typical) and a manual 3- way
valve. This allows the User to connect Sample gas and the Span gas to
the back of the Sample Selector Unit and manually select the gas to
Model 4030 for analysis. The User must ensure that the Sample gas is
kept above the dew point to avoid condensation from the Sample point
to its entry into Model 4030.