400 East Main Street
Annville, PA 17003-0354
Phone: (717) 867-2788
Fax: (717) 867-2714
Electrical
Condition Monitoring & Noise Control
High frequency electrical noise (Traveling Waves) couples into EMI susceptible equipment becoming part of the signal. Knowing this, CHAR Services has developed a proprietary testing technique that uses time delays to determine where the EMI couples into a system. This testing technique is performed on the cables, typically inside the control room rack. CHAR Services refers to this technique as the Reverse Time Domain Reflectometer (RTDR).
The RTDR works like a TDR for locating coupling locations.
- A pulse is coupled to the shield.
- The pulse travels along shield coupling at discontinuities.
- The signal return is measured to determine coupling points.
- RTDR Pulse level approximates plant noise.
- Coupling paths are identical as used by plant noise.
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2003 CHAR Services, Inc, All Rights Reserved
P.O. Box 354 Annville, PA 17003
(717) 867-2788
P.O. Box 354 Annville, PA 17003
(717) 867-2788