RKI Instruments Digester Gas Monitor - Manual (Page 87)

Digester Gas Monitor Operator’s Manual Troubleshooting • 81
Flow Fail or
Low Flow • The Digester
Gas Monitor
indicates a flow
failure alarm.
• The Flow to
Sensors
flowmeter
cannot be set to
3.0 SCFH.
• The H
2
S
Dilution
flowmeters
cannot be set to
their appropriate
flows.
• The compressed air
pressure is not high
enough.
• There is a
flowmeter
malfunction.
• The inlet line is
clogged.
• The water trap is
full of water or the
water trap filter is
dirty.
• The hydrophobic
filter is dirty or
clogged.
• The oil mist filter is
dirty or clogged.
• The air filter is dirty
or clogged.
• There are
particulates in the
flow system.
1. Check your compressed air
source to make sure the settings
are appropriate and the pressure
is high enough.
2. Inspect the flowmeters to see if
there is anything wrong with them.
3. Inspect the inlet line to make sure
nothing is blocking it.
4. Inspect the water trap and empty
the water trap if it is full of water. If
the water trap filter is dirty or
clogged, replace it as described in
“Replacing the Water Trap Filter
Element” on page 87.
5. Inspect the hydrophobic filter and
replace it if it appears dirty or
clogged. See “Replacing the
Hydrophobic Filter” on page 85 for
replacement instructions.
6. Inspect the oil mist filter and
replace it if it appears dirty or
clogged. See “Replacing the Oil
Mist Filter” on page 86 for
replacement instructions.
7. Inspect the air filter and replace it
if it appears dirty or clogged. See
“Replacing the Air Filter” on
page 84 for replacement
instructions.
8. Visually inspect the flow system
for blockages.
9. If the problems persist, contact
RKI Instruments, Inc. for further
instruction.
Water
Condensation
in Flow
System • A visual
inspection
reveals
condensation in
the flow system. • The oil mist filter is
clogged.
• The flow through
the dryer is
insufficient.
1. Inspect the oil mist filter and
replace it if it appears dirty or
clogged. See “Replacing the Oil
Mist Filter” on page 86 for
replacement instructions.
2. Measure the air flow coming out
of the dryer exhaust fitting. It
should be at least 6 SCFH. For
ideal operation, it should be closer
to 9 SCFH.
Table 22: Troubleshooting the Digester Gas Monitor (Continued)
Condition Symptom(s) Probable Causes Recommended Action