Model 520 HT UCA
D01157216
Revision A, October 2015
34
Symptom
Cause
Remedy
pump muffler.
remove all water from air side of
pump. Pump may also be sent back
for repair.
9.2
Maintenance
The maintenance requirements for UCA are simple and should consume little time.
The first maintenance item is to check and replace the 2 micron filter element
inside the high pressure filter housing periodically. The filter housing is located on
top of the instrument cabinet and is connected to the high pressure tubing leading to
the test cylinder. The filter housing should be thoroughly cleaned at this time. The
high pressure filter is designed to prevent cement particles from entering the
PRESSURE REGULATOR and damaging it.
The second maintenance item is to thoroughly clean and lubricate the test cylinder
after every test. Be sure to inspect the o-rings for damage and replace if damaged
or severely distorted.
It is recommended that the thermocouple and water line connections on the top
plug be cleaned periodically to prevent buildup of cement in the bore and threads.
Problems related to corrosion of the lower transducer connection
can be minimized by not allowing water to run down the side of
the cylinder and into the bottom of the instrument.
Periodically inspect the electrical connector in the bottom of the instrument where
the test cylinder rests. If this connector becomes dirty or corroded, the lower
transducer may not make good electrical contact. Clean the connector if necessary.
Unlike other UCAs, it is not necessary to coat the ultrasonic transducers with
couplant prior to every test. In fact, the transducers should not be removed unless
they are believed to be faulty or unless they need additional couplant. The top
transducer is sealed to prevent water from entering the transducer chamber during
cylinder filling or cleanup.
