Campbell Scientific PVS4100/4120/4150 Portable Automatic Samplers - Manual (Page 27)

2-1
Section 2. Installation
2.1 Cabinet Positioning
Place the sampler on a level surface as close as practical to the sample source.
Refer to the speed charts for maximum expected lift and draw. Manhole
installation may require 3-point suspension harness.
Sampler must be located above sample source, or liquid will flood the machine.
For situations where this is not possible, please contact a Campbell Scientific
application engineer for solutions on pressurized sources.
FIGURE 2-1. Sampler Installation