Teledyne M300EM operation manual A Primer On Electro-Staticdischarge

Teledyne API –Operation Manual - Model 300E Family CO Analyzers	Table of Contents
13.2.2. Typical Sample Gas Flow Problems	282
13.2.2.1. Flow is Zero	282
13.2.2.2. Low Flow	282
13.2.2.3. High Flow	282
13.2.2.4. Displayed Flow = “Warnings”	283
13.2.2.5. Actual Flow Does Not Match Displayed Flow	283
13.2.2.6. Sample Pump	283
13.3. Calibration Problems	283
13.3.1. Miscalibrated	283
13.3.2. Non-Repeatable Zero and Span	284
13.3.3. Inability to Span – No SPAN Key	284
13.3.4. Inability to Zero – No ZERO Key	284
13.4. Other Performance Problems	285
13.4.1. Temperature Problems	285
13.4.1.1. Box or Sample Temperature	285
13.4.1.2. Bench Temperature	285
13.4.1.3. GFC Wheel Temperature	286
13.4.1.4. IR Photo-Detector TEC Temperature	286
13.4.2. Excessive Noise	287
13.5. Subsystem Checkout	288
13.5.1. AC Mains Configuration	288
13.5.2. DC Power Supply	288
13.5.3. I2C Bus	289
13.5.4. Keyboard/Display Interface	289
13.5.5. Relay Board	290
13.5.6. Sensor Assembly	291
13.5.6.1. Sync/Demodulator Assembly	291
13.5.6.2. Electrical Test	291
13.5.6.3. Opto Pickup Assembly	292
13.5.6.4. GFC Wheel Drive	292
13.5.6.5. IR Source	292
13.5.6.6. Pressure/Flow Sensor Assembly	293
13.5.7. Motherboard	294
13.5.7.1. A/D Functions	294
13.5.7.2. Test Channel / Analog Outputs Voltage	294
13.5.7.3. Analog Outputs: Current Loop	295
13.5.7.4. Status Outputs	296
13.5.7.5. Control Inputs – Remote Zero, Span	297
13.5.8. CPU	297
13.5.9. RS-232 Communications	297
13.5.9.1. General RS-232 Troubleshooting	297
13.5.9.2. Troubleshooting Analyzer/Modem or Terminal Operation	298
13.5.10. The Optional CO2 Sensor	298
13.6. Repair Procedures	299
13.6.1. Repairing Sample Flow Control Assembly	299
13.6.2. Removing/Replacing the GFC Wheel	300
13.6.3. Checking and Adjusting the Sync/Demodulator, Circuit Gain (CO MEAS)	302
13.6.3.1. Checking the Sync/Demodulator Circuit Gain	302
13.6.3.2. Adjusting the Sync/Demodulator, Circuit Gain	303
13.6.4. Disk-On-Module Replacement Procedure	304
13.7. Technical Assistance	304
14. A PRIMER ON ELECTRO-STATIC DISCHARGE	305
14.1. How Static Charges are Created	305
14.2. How Electro-Static Charges Cause Damage	306
14.3. Common Myths About ESD Damage	307
14.4. Basic Principles of Static Control	307
14.4.1. General Rules	307
14.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance	309
04288D DCN5752	xv