Table of Contents

Model GFC7000TA Carbon Dioxide Analyzer

8. MAINTENANCE SCHEDULE & PROCEDURES

179

8.1. Maintenance Schedule

179

8.2. Predicting Failures Using the Test Functions

183

8.3. Maintenance Procedures

184

8.3.1. Replacing the Sample Particulate Filter

184

8.3.2. Rebuilding the Sample Pump

185

8.3.3. Performing Leak Checks

185

8.3.4. Performing a Sample Flow Check

186

8.3.5. Cleaning the Optical Bench

186

8.3.6. Cleaning Exterior Surfaces of the GFC 7000TA

186

9. THEORY OF OPERATION

187

9.1. Measurement Method

187

9.1.1. Beer’s Law

187

9.1.2. Measurement Fundamentals

187

9.1.3. Gas Filter Correlation

188

9.1.4. Interference and Signal to Noise Rejection

190

9.2. Pneumatic Operation

193

9.2.1. Sample Gas Flow

194

9.2.2. Flow Rate Control

194

9.2.3. Purge Gas Pressure Control

196

9.2.4. Particulate Filter

196

9.2.5. Pneumatic Sensors

196

9.3. Electronic Operation

197

9.3.1. Overview

197

9.3.2. CPU

199

9.3.3. Optical Bench & GFC Wheel

200

9.3.4. Synchronous Demodulator (Sync/Demod) Assembly

202

9.3.5. Relay Board

205

9.3.6. Mother Board

207

9.3.7. I2C Data Bus

210

9.3.8. Power Supply/ Circuit Breaker

211

9.4. Front Panel Touchscreen/Display Interface

212

9.4.1. LVDS Transmitter Board

212

9.4.2. Front Panel Touchscreen/Display Interface PCA

212

9.5. Software Operation

213

9.5.1. Adaptive Filter

213

9.5.2. Calibration - Slope and Offset

214

9.5.3. Measurement Algorithm

214

9.5.4. Temperature and Pressure Compensation

215

9.5.5. Internal Data Acquisition System (DAS)

215

10. TROUBLESHOOTING & REPAIR PROCEDURES

217

10.1. General Troubleshooting Hints

217

10.1.1. Interpreting WARNING Messages

218

10.1.2. Fault Diagnosis with TEST Functions

221

10.1.3. Using the Diagnostic Signal I/O Function

223

10.1.4. Internal Electronic Status LEDs

224

10.2. Gas Flow Problems

228

10.2.1. GFC 7000TA Internal Gas Flow Diagrams

229

10.2.2. Typical Sample Gas Flow Problems

232

10.2.3. Poor or Stopped Flow of Purge Gas

234

10.3. Calibration Problems

235

10.3.1. Miscalibrated

235

10.3.2. Non-Repeatable Zero and Span

236

10.3.3. Inability to Span – Touchscreen SPAN Button Not Visible

236

10.3.4. Inability to Zero – Touchscreen ZERO Button Not Visible

237

10.4. Other Performance Problems

238

10.4.1. Temperature Problems

238

10.4.2. Excessive Noise

240

10.5. Subsystem Checkout

241

10.5.1. AC Mains Configuration

241

10.5.2. DC Power Supply

241

10.5.3. I2C Bus

242

Teledyne Analytical Instruments

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Teledyne gfc 7000ta Maintenance Schedule & Procedures, Theory of Operation, Troubleshooting & Repair Procedures

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.