page 5
1.0 INTRODUCTION
The LFS-113 series sampler provides a rugged, reliable and compact sampling
system for industrial hygiene and environmental sampling employment of single or
multiple sorbent tubes and gas sampling bags. Two low flow modes of sampling
allowconstant flows from 5-200 cc/min., as well as constant pressure for multiple
sorbent tube sampling from 1-350 cc/min. (combined flow rates). A compact and
lightweight sampler, the LFS combines convenience and useful functions for accurate
sampling.
1.1 Theory of Operation
The LFS low flow sampler offers two modes of sampling which are easily activated
by turning the selector dial located at the back of the sampler. A hex wrench is inserted
and turned to the desired position and a visual indicator displays the mode being used.
The sampler is turned on and will run continuously until manually shut down. An
optional LCD clock is available on DC models which offers elapsed run time and an
instant-fault function.The constant pressure (multi-flow) mode when used with a
multiple flow controller tube holder, offers a multi-tube sampling capability that is
adjusted individually at each tube position.
page 16
Figure 5
"Constant-pressure" mode
for multi-tube sampling
To Next Page
Loading...