Manual

8 • Internal Description Digester Gas Monitor Operator’s Manual
Internal Description
This section describes the internal components of the Digester Gas Monitor. A flow
diagram is shown in Figure 2 and an internal component location is shown in Figure 3.
Figure 2: Flow Diagram
Digester
Sample
Regulator
2-Way Solenoid Valve C
De-Energized: Aspirator Off
Energized: Aspirator On
Cal
Gas
Fitting
Energized: Sample
De-Energized: Valve B
3-Way Solenoid Valve A
Particle Filter
3-Way Solenoid Valve B De-Energized: Fresh Air Energized: Cal Gas
Fresh Air In
Water Trap
Flow Meter
0-5 SCFH
Dryer Exhaust
Restrictor
Blowback Exhaust Aspirator E xhaust
Acropak
Filter
Oil Mist
Filter
Check
Valve
Dryer
Aspirator
H2S
7:1
Dilution
2-Way Solenoid Valve E De-Energized: Normal Op. Energized: Blow Back
2-Way Solenoid Valve D De-Energized: Normal Op. Energized: Blow Back
Sample
Flow Meter
0-0.5 SCFH
CO2
CH4
O2
ChemTech
Flow Switch
Dilution
Flow Meter
0-2 SCFH
Restrictor
Compressed Air
Filter/Water
Trap, Field
Installed
Compressed
Air Source Compressed
Air In Fitting