Troubleshooting

Model GFC7000TA Carbon Dioxide Analyzer

10.4. Other Performance Problems

Dynamic problems (i.e. problems which only manifest themselves when the analyzer is monitoring sample gas) can be the most difficult and time consuming to isolate and resolve. The following provides an itemized list of the most common dynamic problems with recommended troubleshooting checks and corrective actions.

10.4.1. Temperature Problems

Individual control loops are used to maintain the set point of the absorption bench, filter wheel, and IR photo-detector temperatures. If any of these temperatures are out of range or are poorly controlled, the GFC 7000TA will perform poorly.

10.4.1.1. Box or Sample Temperature

Box Temperature

The box temperature sensor is mounted to the motherboard and cannot be disconnected to check its resistance. Rather check the BOX TEMP signal using the SIGNAL I/O function under the DIAG Menu (See Section 10.1.3). This parameter will vary with ambient temperature, but at ~30oC (6-7° above room temperature) the signal should be ~1450 mV.

Sample Temperature

The Sample Temperature should closely track the bench temperature. If it does not, locate the sensor, which is located at the midpoint of the optical bench in a brass fitting. Unplug the connector labeled “Sample”, and measure the resistance of the thermistor; at room temperature (25°C) it should be ~30K Ohms, at operating temperature, 48°C, it should be ~ 12K Ohms

10.4.1.2. Bench Temperature

There are three possible failures that could cause the Bench temperature to be incorrect.

1.The heater mounted to the bottom of the Absorption bench is electrically shorted or open. Check the resistance of the two heater elements by measuring between pin 2 and 4 (~76 Ohms), and pin 3 and 4 (~330 Ohms), of the white five-pin connector just below the sample temperature sensor on the Bench (pin 1 is the pointed end).

2.Assuming that the I2C bus is working and that there is no other failure with the relay board, the solid-state relay (K2) on the relay board may have failed. Using the BENCH_HEATER parameter under the signal I/O function, as described above, turn on and off K2 (D3 on the relay board should illuminate as the heater is turned on). Check the AC voltage present between pin 2 and 4, for a 100 or 115 VAC model, and pins 3 and 4, for a 220-240 VAC model.

WARNING:

HAZARDOUS VOLTAGES ARE PRESENT DURING THIS TEST

Teledyne Analytical Instruments

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Teledyne gfc 7000ta Other Performance Problems, Temperature Problems, Box or Sample Temperature, Bench Temperature
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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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