Form 37182 Rev 201019
Page 4 of 12
Set Up/Sample
• Allow pump to equilibrate after moving it from one temperature extreme to another.
• Protect sample pump from weather when sampling outdoors.
• Do
not
operate the pump in hazardous or explosive locations. AirLite with Timer is designed for applications that do
not require intrinsic safety.
•
For maximum run time,
insert new batteries in pump before each sampling period. If using rechargeable AA 1.2-volt
NiMH batteries, expect approximately half the run time stated for disposable batteries.
1. Replace the representative sample medium used for calibration with new unexposed medium for sample
collection.
2. Place the sample medium where appropriate for sampling. For
personal sampling,
clip the sample collection
medium to the worker in the breathing zone and the pump to the worker’s belt using the belt clip.
3. Press the on/off button to turn on the pump and start sampling. Record the start time and other pertinent
information. The LCD will automatically display elapsed pump run time.
See below.
Possible Displays During Sampling
Flow or Battery Fault Shutdown -
If the pump is unable to compensate due to excessive back pressure or a low battery
condition exists, it will shut down and timing functions will pause. The LCD will display either a battery-shaped icon
or a flow fault icon (
) depending on the cause of the shutdown. Upon flow fault, the pump will attempt to restart up
to five times. To restart from flow fault, correct the blockage and press the on/off button twice.
The elapsed run time
display will reset to 0 when the pump is restarted.
If the battery icon is displayed, recharge the battery before sampling.
Displayed Elapsed Run Time -
Elapsed run time is displayed continuously on the LCD. For elapsed times after 999
minutes, the display will show the count start from 0 to 999 again.
4. At the end of the sampling period, press the on/off button and record stop time and other pertinent information.
5. Cap the sample and send it with blanks and pertinent sampling information to a laboratory for analysis.
6. Verify the flow.
a. Turn on the pump and reinstate the calibration train and sample medium.
b. Take three readings and record the average value as the post-sample flow rate.
Do not adjust the pump flow rate during this step.
c. Compare the pre and post-sample flow rates. Note in sampling documentation if the values differ by more than ± 5%.
Clip sample medium
to worker and pump
to belt.
