Troubleshooting

Model GFC7000TA Carbon Dioxide Analyzer

3.If the relay has failed there should be no change in the voltage across pins 2 and 4 or 3 and 4. NOTE: K2 is in a socket for easy replacement.

4.If K2 checks out OK, the thermistor temperature sensor located on the optical bench near the front of the instrument could be at fault. Unplug the connector labeled “Bench”, and measure the resistance of the thermistor. At room temperature it should have approximately 30K Ohms resistance near the 48oC set point it should have ~12K ohms.

10.4.1.3. GFC Wheel Temperature

Like the bench heater above there are three possible causes for the GFC wheel temperature to have failed.

1.The wheel heater has failed. Check the resistance between pins 1 and 4 on the white five-pin connector just below the sample temperature sensor on the bench (pin 1 is the pointed end). It should be approximately 275 ohms.

2.Assuming that the I2C bus is working and that there is no other failure with the relay board, the solid-state relay (K1) on the relay board may have failed. Using the WHEEL_HEATER parameter under the signal I/O function, as described above, turn on and off K1 (D2 on the relay board should illuminate as the heater is turned on). Check the AC voltage present between Pin 1 and Pin 4.

WARNING:

HAZARDOUS VOLTAGES ARE PRESENT DURING THIS TEST

3.If the relay has failed there should be no change in the voltage across pins 1 and 4. NOTE: K1 is socketed for easy replacement.

4.If K1 checks out OK, the thermistor temperature sensor located at the front of the filter wheel assembly may have failed. Unplug the connector labeled “Wheel”, and measure the resistance of the thermistor. The resistance near the 68oC set point is ~5.7k ohms.

10.4.1.4. IR Photo-Detector TEC Temperature

If the PHT DRIVE test parameter described above in Table 11-2 is out of range there are two four possible causes of failure.

1.The screws retaining the IR photo detector to the absorption bench have become loose. Carefully tighten the screws, hand-tight and note whether, after the analyzer has come up to operating temperature, whether the PHT DRIVE voltage has returned to an acceptable level.

2.The two large transistor-type devices mounted to the side of the Absorption Bench have come loose from the bench. Tighten the retaining screws and note whether there is an improvement in the PHT DRIVE voltage.

3.The photo-detector has failed. Contact the factory for instructions.

4.The sync demodulator circuit board has failed. Contact the factor for instructions.

Teledyne Analytical Instruments

239

Page 256 Page 258
Page 257
Image 257
Teledyne gfc 7000ta operation manual GFC Wheel Temperature, IR Photo-Detector TEC Temperature
Page 256 Page 258

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.
Top Page Image Contents