Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 23)

Introduction Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 23
1. INTRODUCTION
1.1. GFC 7001E FAMILY OVERVIEW
The family includes the GFC 7001E and the GFC 7001EM Gas Filter Correlation (GFC) Carbon Monoxide
Analyzer. The GFC 7001E family of analyzers is a microprocessor-controlled analyzer that determines the
concentration of carbon monoxide (CO) in a sample gas drawn through the instrument. It uses a method based
on the Beer-Lambert law, an empirical relationship that relates the absorption of light to the properties of the
material through which the light is traveling over a defined distance. In this case the light is infrared radiation (IR)
traveling through a sample chamber filled with gas bearing a varying concentration of CO.
The GFC 7001E/EM uses Gas Filter Correlation (GFC) to overcome the interfering effects of various other gases
(such as water vapor) that also absorb IR. The analyzer passes the IR beam through a spinning wheel made up
of two separate chambers, one containing a high concentration of CO, known as the reference, and the other
containing a neutral gas known as the measure. The concentration of CO in the sample chamber is computed by
taking the ratio of the instantaneous measure and reference values and then compensating the ratio for sample
temperature and pressure.
The GFC 7001E/EM Analyzer’s multi-tasking software gives the ability to track and report a large number of
operational parameters in real time. These readings are compared to diagnostic limits kept in the analyzers
memory and should any fall outside of those limits the analyzer issues automatic warnings.
Built-in data acquisition capability, using the analyzer's internal memory, allows the logging of multiple
parameters including averaged or instantaneous concentration values, calibration data, and operating
parameters such as pressure and flow rate. Stored data are easily retrieved through the serial port or optional
Ethernet port via our APICOM software or from the front panel, allowing operators to perform predictive
diagnostics and enhanced data analysis by tracking parameter trends. Multiple averaging periods of one minute
to 365 days are available for over a period of one year.
Some of the common features of your GFC 7001E family of analyzers are:
 Microprocessor controlled for versatility
 Multi-tasking software allows viewing of test variables during operation
 Continuous self checking with alarms
 Bi-directional RS-232 for remote operation
 Digital status outputs indicate instrument operating condition
 Adaptive signal filtering optimizes response time
 Gas Filter Correlation Wheel for CO specific measurement
 GFC Wheel guaranteed against leaks for 5 years
 Temperature & Pressure compensation
 Internal data logging with 1 min to 365 day multiple average
 Remote operation when used with Teledyne APICOM software
GFC 7001E FEATURES:
 Ranges, 0-1 ppm to 0-1000 ppm, user selectable
 14-meter path length for sensitivity
GFC 7001EM FEATURES:
 Ranges, 0-1 ppm; Max: 0-5000 ppm, user selectable
 2.5 meter path length for dynamic range