FAQ

Model GFC7000TA Carbon Dioxide Analyzer

5.4. Calibration Valves Options

There are four available options involving Zero/span valves. From an operational and software standpoint, all of the options are the same, only the source of the span and zero gases are different.

5.4.1. Ambient Zero/Pressurized Span Valve

This option requires that both zero air and span gas be supplied from external sources. It is specifically designed for applications where span gas will be supplied from a pressurized bottle of calibrated CO2 gas. A critical flow control orifice, internal to the instrument ensures that the proper flow rate is maintained. An internal vent line, isolated by a shutoff valve ensures that the gas pressure of the span gas is reduced to ambient atmospheric pressure. Normally zero air would be supplied from zero air modules such as a Teledyne Instruments Model 701.

In order to ensure that span gas does not migrate backwards through the vent line and alter the concentration of the span gas, a gas line not less than 2 meters in length should be attached to the vent span outlet on the rear panel of the analyzer. To prevent the buildup of back pressure, this vent line should not be greater than 10 meters in length.

The following table describes the state of each valve during the analyzer’s various operational modes.

Table 5-1: Ambient Zero/Pressurized Span Valve Operating States

MODE

VALVE

CONDITION

SAMPLE

Sample/Cal

Open to SAMPLE inlet

 

 

Zero/Span

Open to IZS inlet

(Normal State)

 

Shutoff Valve

Closed

 

Sample/Cal

Open to ZERO/SPAN valve

ZERO CAL

Zero/Span

Open to IZS inlet

 

Shutoff Valve

Closed

 

 

 

 

Sample/Cal

Open to ZERO/SPAN valve

SPAN CAL

 

 

Zero/Span

Open to SHUTOFF valve

 

Shutoff Valve

Open to PRESSURE SPAN Inlet

The minimum span gas flow rate required for this option is 800 cm3/min.

The state of the zero/span valves can also be controlled:

∙Manually from the analyzer’s front panel by using the SIGNAL I/O controls located under the DIAG Menu (Section 6.13.2),

∙By activating the instrument’s AutoCal feature (Section 7.6),

∙Remotely by using the external digital control inputs (Section 6.15.1.2 and Section 7.5.2), or;

∙Remotely through the RS-232/485 serial I/O ports (see Appendix A-6 for the appropriate commands).

Teledyne Analytical Instruments

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Teledyne gfc 7000ta operation manual Calibration Valves Options, Ambient Zero/Pressurized Span Valve
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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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