4230 Flow Meter
Section 5 Maintenance and Service
5-4
Regeneration of the desiccators is extremely important.
While it is true that the equipment may run for some time with
saturated desiccators, the operating environment of many instal-
lations places the units at risk. Please consider the following:
Note
Saturated desiccators let the flow meter draw moisture inside,
exposing both mechanical and electronic components. The air
in many installations contains fumes that will form acids in the
presence of moisture. These acids may corrode electrical
components, particularly connectors and circuit boards.
Operation of the air pump in low temperature, high humidity
environments causes ice to form inside the pump. The ice
formed could jam the pump, ruining it.
Unseen damage caused by moisture will eventually ruin
the flow meter. For maximum equipment life and reliability,
inspect the desiccators regularly and regenerate them when
necessary.
5.3 Bubble Line
Maintenance
Periodically inspect the bubble line from the 4230 to make sure
that it has not become kinked, frayed, cut, nicked, or damaged in
any other way. If you find damage to the bubble line, replace it. A
leaking or obstructed line will cause inaccurate level readings
and lower battery life. (The pump must run more frequently.)
Look for a pump duty cycle value in the STATUS menu higher
than 20%. If you need to replace the bubble line, install a new
line the same way you installed the original. Generally, the new
line should be the same length and diameter as the old.
Note
If you replace the bubble line or if you change the outlet either
by cutting off the tip or by installing a bubble line extension,
you must recalibrate the level. You should also recheck the
bubble rate to make sure it has not changed.
5.3.1 Inspection of the
Bubble Line Outlet
Inspect the outlet of the bubble line regularly for any signs of
clogging. Sediment or debris from the flow stream and algae can
all clog the line. If the line is blocked, you can either clean it out,
or simply cut off the tip.
If clogging proves to be a recurring problem, you may want to use
a bubble line with a larger inside diameter. However, you will
usually find it preferable to increase the frequency of Purge to
increasing the size of the bubble line.
If you decide to change the bubble line size, consult the factory
for specific recommendations regarding the size of the line, con-
nectors required, etc.
If algae growth is a problem, consider using a copper bubble line
extension. The copper salts formed on the line by the flow stream
are algicidal. Again, recheck the bubble rate and re-enter the
actual level measurement.
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