Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 19)

Total Hydrocarbon Analyzer Introduction
Teledyne Analytical Instruments 1
Introduction
Teledyne Analytical Instruments Model 4020 Total Hydrocarbon
Analyzer is a versatile instrument designed to measure the quantity of
hydrocarbons present in a positive pressure sample as equivalent
methane. The Model 4020 is a microprocessor controlled digital
instrument based on Teledyne’s highly successful Model 402R series
analog Total Hydrocarbon Analyzer. This instrument includes special
modifications for automatic switching between sample gas in two
different background gases.
1.1 Main Features of the Analyzer
The Model 4020 Total Hydrocarbon Analyzer is sophisticated yet
simple to use. A dual display on the front panel prompts and informs the
operator during all phases of operation. The main features of the
analyzer include:
 Easy-to-use front panel interface that includes a red 5-digit
LED display and a vacuum fluorescent display (VFD), driven
by microprocessor electronics.
 High resolution, accurate readings of concentration from low
ppm levels to 6%.
 Versatile analysis with three user-definable analysis ranges
from 1 ppm through 6%.
 Microprocessor based electronics: 8-bit CMOS
microprocessor with 32 kB RAM and 128 kB ROM.
 Autoranging allows analyzer to automatically select the proper
preset range for a given measurement. Manual override allows
the user to lock onto a specific range of interest.
 One adjustable concentration alarm and a system failure
alarm.
 Manual or automatic switching between two background gas
streams.