Theory of Operation

Model GFC7000TA Carbon Dioxide Analyzer

9.3. Electronic Operation

9.3.1. Overview

Figure 10-9 shows a block diagram of the major electronic components of the Model GFC 7000TA.

The core of the analyzer is a microcomputer/central processing unit (CPU) that controls various internal processes, interprets data, makes calculations, and reports results using specialized firmware developed by Teledyne Instruments. It communicates with the user as well as receives data from and issues commands to a variety of peripheral devices via a separate printed circuit assembly called the Mother Board.

The mother board, directly mounted to the analyzer’s inside rear panel, collects data, performs signal conditioning duties and routs incoming and outgoing signals between the CPU and the analyzer’s other major components.

Data is generated by a gas-filter-correlation optical bench which outputs an analog signal corresponding to the concentration of CO2 in the sample gas. This analog signal is transformed into two, pre-amplified, DC voltages (CO2 MEAS and CO2 REF) by a synchronous demodulator printed circuit assembly. CO2 MEAS and CO2 REF are converted into digital data by a unipolar, analog-to-digital converter, located on the mother board.

A variety of sensors report the physical and operational status of the analyzer’s major components, again through the signal processing capabilities of the mother board. These status reports are used as data for the CO2 concentration calculation and as trigger events for certain control commands issued by the CPU. They are stored in memory by the CPU and in most cases can be viewed but the user via the front panel display.

The CPU communicates with the user and the outside world in a variety of manners:

∙Through the analyzer’s touchscreen and LCD display over a clocked, digital, serial I/O bus (using a protocol called I2C)

∙RS 232 & RS485 Serial I/O channels via Ethernet, Modbus®, Apicom or a terminal emulation program

∙Various DCV and DCA analog outputs, and

∙Several sets of Digital I/O channels.

Finally, the CPU issues commands via a series of relays and switches (also over the I2C bus) located on a separate printed circuit assembly to control the function of key electromechanical devices such as heaters, motors and valves.

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gfc 7000ta specifications

The Teledyne GFC 7000TA is a cutting-edge, high-performance gas flow calibrator designed for both laboratory and field applications. This instrument is renowned for its accuracy, versatility, and reliability, making it an ideal choice for various industries, including aerospace, environmental monitoring, and manufacturing.

One of the standout features of the GFC 7000TA is its advanced measurement technology. It utilizes state-of-the-art thermal mass flow meters, which allow for precise fluid measurement across a wide range of flow rates. This technology ensures highly accurate readings, which are essential for applications requiring stringent compliance with regulatory standards.

The GFC 7000TA is capable of accommodating various types of gases, making it particularly versatile. Users can calibrate flow for gases such as air, nitrogen, or carbon dioxide, providing flexibility in a multitude of applications. The device also supports dual-channel capabilities, allowing simultaneous measurement and calibration of two different gas types, enhancing productivity and efficiency in processes.

Another notable characteristic of the GFC 7000TA is its user-friendly interface. Equipped with a high-resolution touchscreen display, the device offers intuitive navigation and data visualization. Users can easily set parameters, view real-time measurements, and generate printed reports. This interface reduces the learning curve for new operators, allowing organizations to implement the GFC 7000TA with minimal training.

In addition to its advanced measuring capabilities, the GFC 7000TA features a robust design for durability in harsh environments. The instrument is compliant with various international standards, ensuring its reliability and performance in various conditions. Its portable form factor makes it convenient for fieldwork, while the rugged construction provides peace of mind for users working in demanding settings.

The GFC 7000TA also incorporates modern connectivity options. With built-in USB and Ethernet ports, users can easily integrate the device into their existing systems for data logging and remote monitoring. This connectivity feature enables real-time data access and enhances the potential for analysis and optimization of gas flow systems.

In summary, the Teledyne GFC 7000TA is a high-performance gas flow calibrator characterized by its advanced thermal mass flow measurement technology, versatility in accommodating various gases, user-friendly interface, and robust design. With its modern connectivity features, this instrument stands out as a vital tool for professionals seeking precision and reliability in gas flow applications.
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