8
w
w
w
.m
a
r
k
e
s
.c
o
m
Figure 4: Setting a constant flow rate.
•
Turn on the pump using a pointed instrument such as a ballpoint pen (
).
•
Make sure the flow measuring device is on and working.
•
Use a flat-bladed screwdriver to make flow adjustments on the pump itself (
).
•
When the desired flow rate has been reached, turn off the pump and flow measuring device. The pump
is now ready for sampling.
