SKC 222-Series Low Flow Pump - Manual (Page 6)

4
Operation
Setting the Sampling Rate
1. Using a slott ed screwdriver, remove the metal plate on the front of the
pump.
2. Use the screwdriver to turn the fl ow adjust dial. Turning the dial clockwise
toward the 100 position increases fl ow, turning it counterclockwise toward
the 0 position decreases fl ow. The scale on the dial is arbitrary.
Measuring Flow Rate
Before use, allow pump to equilibrate after moving it from one tempera-
ture extreme to another.
1. Ensure pump has run for 5 minutes before measuring fl ow rate.
2. Using fl exible tubing, att ach the outlet of a representative sample tube to
the pump inlet.
3. Att ach the inlet of the sample tube to a fi lm fl owmeter.
4. Turn on the pump using the on/off switch between the counter and the dial.
5. Measure the fl ow rate following the fl owmeter operating instructions. Ad-
just the fl ow by using the screwdriver to turn the dial clockwise to increase
fl ow or counterclockwise to decrease fl ow.
6. Disconnect the fi lm fl owmeter and the representative sample tube.
Sampling with Sorbent Tubes
Using the Stroke Counter
Before use, allow pump to equilibrate after moving it from one tempera-
ture extreme to another.
Protect sample pump from weather when in use outdoors.
Use of any device other than the approved battery pack to power the
pump voids the UL Listing for intrinsic safety and any warranty.
1. Record the initial counter reading.
2. Break the ends off a new sorbent tube.
3. Using fl exible tubing, connect the inlet of the sample pump to the outlet of
the sorbent tube.
4. Turn on the pump and sample for the desired sample period.
5. When sampling is completed, turn off the pump.
6. Disconnect and seal the sorbent tube.
7. Record the fi nal counter reading. Calculate the air volume using the fol-
lowing equation. To determine the pump factor, see page 5.
( )
Air
=
Final Counter
-
Initial Counter
x
Pump
Volume Reading Reading Factor