SKC 224-44XR Universal Pump - Manual (Page 12)

10
Activating the Regulator
Remove the tamper-resistant cover.
Start the pump using the on/off
switch (Figure 2, #1), and adjust the
fl ow rate using the fl ow adjustment
screw (Figure 2, #4) until the built-
in rotameter reads approximately
1.5 L/min.
Remove the cap screw covering the
regulator valve (Figure 2, #11) and
turn the exposed screw four to fi ve
turns counterclockwise.
Replace the cap screw. The pump is now set for low fl ow.
Setting or Verifying Flow Rate
Ensure pump has run for
fi ve minutes before proceed-
ing with calibration.
Before use, allow pump to
equilibrate after moving
it from one temperature
extreme to another.
Connect a single adjustable
low fl ow holder (Figure 3)
to the pump intake (Figure
2, #6) using 1/4-inch Tygon
tubing.
Insert an opened sorbent tube
(Figure 3, #3) into the rubber
sleeve (Figure 3, #2) of the
low fl ow holder with the
arrow on the tube pointing
toward the holder.
Connect a calibrator to the exposed
end of the sorbent tube.
For low fl ow, turn valve screw
counterclockwise.
2
3
continued on page 10

Air
fl ow



Calibration train with tube
in low fl ow holder
1 Flow adjust screw
2 Rubber sleeve
3 Sorbent tube
Figure 3
Single Adjustable
Low Flow Holder with
sample tube