700-Bubbler-Man Rev 12 13 Feb 2020
Page 44/51
DATA INDICATORS (con’t)
Data painting
(saw tooth graph)
Figure B-1: Example of data painting
termination
B) Orifice line termination not
secure (moving in the flow)
C) Moisture in orifice line
D) Samples are too frequent -
dampening is required
Ensure the orifice line termination is free
from silt/obstructions.
Ensure the orifice line termination point is
secured to prevent any movement.
Remove any catenaries along the orifice line
run (moisture can accumulate in lower
points along the line’s run).
Increase the sampling period (Averaging
Duration) with the XSP command (see
Data spikes
Air intake path is restricted
1) Ensure there are no blockages in the air
intake path, including possible blocked
desiccant inlet vent
2) Remove any check valves or similar
restricting attachments on the air inlet path
3) Ensure each Bubbler has a dedicated
desiccator and air intake path (i.e. do not
run multiple Bubblers on the same
desiccator)
For the curious: The atmospheric reference for the pressure transducer is
based on the air pressure from the air inlet. A temporary difference in the
atmospheric reference occurs when the air inlet path is plugged or restricted
(such as with check valves), this results in a temporary difference in the
atmospheric reference until pressure equalizes. These periods will be
displayed as data spikes which correspond to tank top ups (for a blocked
valve) or when the check valves engage after the compressor stops.
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