Flowserve VKP 40Ex User Manual
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Press the tip of the measuring probe at various points in the close vicinity of the steam trap (supports, uninsulated pipes upstream and
downstream of the trap) to detect the respective sound levels.
By comparing the
MEAN VALUE with the MEASURED VALUE the influence of foreign noise on the test can be confirmed or ruled out.
If the detected sound level is below the mean value of the trap test
(MEASURED VALUE < MEAN VALUE), an influence of foreign noise
can be ruled out.
In this case use the arrow buttons , to mark
FOREIGN NOISE: NO.
If the detected sound level exceeds the mean value of the trap test
(MEASURED VALUE > MEAN VALUE), the place where the steam
trap is installed is influenced by foreign noise. In this case use the arrow buttons , to mark
FOREIGN NOISE: YES.
Press the ENTER key to show the recorded sound curve and its evaluation on the display
.
OK: No
Trap defective
or
OK: FN
Trap influenced by foreign noise
Press the ENTER key to save the result.
Foreign noise
Checking Steam Traps
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Make sure that the measuring probe is applied to the same points on the trap bodies of steam traps of the same type so
that the test results of the steam traps can be compared and changes can be ascertained when repeating the tests.
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Provided that the upstream pressure has been specified on the PC, the temperature of the steam trap body will also
be measured and used for the analysis. In this case the surface of the reference point on the trap where the tip of the
measuring probe is applied has to be smooth and metallically bare. Otherwise considerable deviations between the
temperature reading and the actual temperature will be the consequence, resulting in faulty analysis and incorrect
evaluation.
Note that the probe shall be applied at right angles to the trap surface.
Reference points for measurement
If sound levels (mean values) exceed the specified limits, the display shows the screen
Foreign Noise Test.
For more information refer to section
“Evaluation criteria” and “Evaluating steam traps” of the
Online Documentation.
Measured value sensed at trap
Up-to-the-minute reading during
foreign noise test