Form 37714 Rev 2002
Page 8 of 13
Set Up/Sample with Multiple Tubes
• Requires Constant Pressure Controller (CPC) and Adjustable Low Flow Tube Holder (see Accessories). The low flow tube holder used with CPC
allows up to four tube samples to be taken simultaneously, each at different flow rates if desired.
• Allow pump to equilibrate after moving it from one temperature extreme to another.
• Protect sample pump from weather when sampling outdoors.
• Use of any device or battery pack other than P85004 or P84002 to power the pump voids the UL Listing for intrinsic safety.
• Charge pump completely before calibration and sampling.
• Calibrate/verify pump flow rate before and after each sampling operation using the tube holder and pump to be used for
sampling.
1. Replace the representative sorbent tubes used for calibration with new unexposed sorbent tubes for sample
collection.
2. Place a protective tube cover over each tube and thread into place on holder until secure.
3. Place the adjustable holder with tubes where appropriate for sampling.
For personal sampling,
clip the low
flow tube holder to the worker in the breathing zone and the pump to the worker’s belt.
4.
Press the on/off button to clear the elapsed time displayed on the LCD and to start sampling. Record the start time
and other pertinent information. Sample for the time specified in the method used. The LCD will automatically
display elapsed run time.
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 still shows elapsed time but alternates between displaying the first two digits of the elapsed time
and the last three digits. For example, a pump that has run for 1,440 minutes would display first “01” and then “440.”
The display maximum is 99 999, which is 99,999 minutes.
5. At the end of the sampling period, press the on/off button and record stop time.
6. Cap the sample tubes and send with blanks and pertinent sampling information to a laboratory for analysis.
7. Verify the flow.
a. Turn on the pump and reinstate the calibration train and sample media.
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 tube holder to
worker and pump
to belt.