VICI 230 Dynacalibrator - Manual (Page 36)


Troubleshooting
4. Isolate the leak by using a small quantity of leak detection fluid on each
possible leak point in the suspect loop. Watch carefully for the bubbling or
foaming effect that characterizes a leak.
Most leaks that arise under internal pressures of 20 inches
of water will be small. Because of this, be sure to watch
carefully for a full 30 seconds before concluding that the
point being tested does not leak.
5. Repeat steps 3 and 4 for each potential leak point in the suspect loop.
6. Tighten or remake any connection or joint that has been found to be leaking.
Replace any component whose leak cannot be stopped by the tightening or
remaking process.
7. Rerun the overall system leak checking procedure called out earlier in this
section to ensure that all the leaks in the loop have been identified and repaired.
8. Using clean, lint-free rags, carefully wipe up any residual leak detection fluid
from the interior of the Dynacalibrator cabinet.
Component Isolation Method
1. To remove the top cover, unscrew the six allen screws on each side of the
instrument, above the side bars.
2. Trace out the internal plumbing loop that has been found to be leaking, starting
at the point where the leak checker gauge has been connected and ending
at the point where the air source has been connected. Be sure you have not
overlooked any fitting, joint, or other possible point of leak in this loop. (The
loop is the entire set of internal plumbing that was subjected to the leak
checking charging pressure of 20 inches of water.)
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 disconnected 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.