SKC 224-PCXR8 Universal Pump - Manual (Page 14)

12
Setting or Verifying Flow Rate
For a diagram of the pump, see Figure 1, page 5.
Before use, allow pump to equilibrate after moving it from one temperature
extreme to another.
Ensure pump has run for fi ve minutes
before proceeding with calibration.
Connect a single adjustable low fl ow
holder (Figure 2) to the pump intake
(Figure 1, #13) using 1/4-inch Tygon
tubing.
Insert an opened sorbent tube (Figure 2, #3) into the rubber
sleeve (Figure 2, #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.
Loosen the brass fl ow adjust screw on
the low fl ow holder. Activate the pump by
pressing Flow and Battery Check.
Adjust the fl ow rate by turning the fl ow adjust
screw (Figure 2, #1) on the holder until the
calibrator indicates the desired fl ow.
Do not adjust the fl ow on the pump. Adjust the fl ow only by using the
fl ow adjust screw on the low fl ow holder.
Calibration train with tube
in low fl ow holder
Figure 2
Single Adjustable
Low Flow Holder
with sample tube
1 Flow adjust screw
2 Rubber sleeve
3 Sorbent tube

Air
fl ow



3
Turn screw on
low fl ow holder to
adjust fl ow.
Flow adjust
screw
continued on page 13