VICI 450 Dynacalibrator - Manual (Page 42)

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Troubleshooting
3. Starting at the air source end of the suspect loop, break a fitting and, using an
appropriate adapter, connect the leak checker gauge to the upstream side of
the dis connected joint.
4. Open the valve on the air source and slowly charge the unit until the gauge
reads 20 inches of water. Close the valve on the air source.
5. Monitor the gauge for at least 30 seconds. If the reading does not change,
there are no leaks in this path to this point. Proceed to Step 7. If the reading
drops, then a leak between the air source and the leak checker gauge can be
inferred.
6. Tighten or remake any connection or joint that is upstream of the leak
checker gauge. Repeat steps 4, 5, and 6 until no further leaks are indicated,
then proceed to step 7.
7. Once a section of the loop has been deter mined to be leak free, go to the
next fitting downstream of the point of the previous check and repeat the
previous procedure starting at step 3 above. When the end of the loop has
been reached by the previous sequential troubleshooting procedure, this
check can be considered completed. For reference, the end of the loop is the
point where, in the initial leak checking procedure, the Leak Checker gauge
was placed.
8. Once the task has been completed and all leaks eliminated, close the
instrument up and return it to use.