Envent 331S - Page 5

List of Figures
Figure 1. H
2
S Analyzer Principle of Operation Diagram .............................................................................................9
Figure 2. H
2
S Analysis Cycle ..................................................................................................................................... 10
Figure 3. Space Requirements for the 330S & 331S H
2
S Analyzers ......................................................................... 13
Figure 4. 331S Recommended Venting for 331S (Same for 330S model) ............................................................... 15
Figure 5. AO 4-20 mA Output Wiring Options ......................................................................................................... 17
Figure 6. Sample Chamber (Exploded View) ........................................................................................................... 18
Figure 7. Envent's Humidifier Unit for 330S & 331S ................................................................................................ 20
Figure 8. Humidifier Unit Installed in a 331S H
2
S Analyzer ..................................................................................... 21
Figure 9. Eductor Block (Venturi Effect) .................................................................................................................. 22
Figure 10. 330S Display (left) & 331S Display (right) ............................................................................................... 26
Figure 11. 331S & 331SDS Sensing Tape Change .................................................................................................... 31
List of Tables
Table 1. 330S/331S H2S Analyzer Specifications ........................................................................................................7
Table 2. Sample Volume and & Flow Rate .............................................................................................................. 15
Table 3. Aperture Strips & Ranges ........................................................................................................................... 19
Table 4. Display Button Description/Function ........................................................................................................ 26
Table 5. Display LED Description/Function .............................................................................................................. 27
Table 6. Hydrogen Sulfide Properties ...................................................................................................................... 51
Table 7. Hydrogen Sulfide Quantities & Health Effects ........................................................................................... 51