Panametrics CTF878, Руководство по обслуживанию

Страница: 45 / 67

Model CTF878 Service Manual 35
Chapter 4.
exactly the instructions that came with your transducers and clamping fixture. Also, be sure that the transducer
spacing agrees with the calculated spacing (as a function of soundspeed).
4. INTERNAL DAMAGE
Ultrasonic transducers consist of a ceramic “crystal” bonded to the transducer case. The bond between the crystal
and the case may be damaged by extreme shock and by temperature extremes. The crystal itself can also be
damaged by the same conditions. The internal wiring can be corroded or shorted if contaminants enter the
transducer housing.
5. PHYSICAL DAMAGE
Transducers may be physically damaged by dropping them onto a hard surface or striking them against another
object. The connector on the transducer is usually the part that is damaged. Minor damage may be repaired by
carefully bending the connector back into shape. If the connector cannot be repaired, replace the transducers. After
replacement, the flowmeter parameters should be checked (see
Programming Site Data, Chapter 1 of the
Programming Manual, or Chapter 3 of the Startup Guide).
Contact the factory if you cannot solve a transducer-related problem.