Nextteq Standard Airtec Regulator Kit - Manual (Page 19)

PACKING LIST SECTION II: Airtec Kit Components
19 NEXTTEQ LLC (Rev. 2) 4/09
5) Break the end off of a fresh tube and install it in the tube holder. Note the
directional arrow. Hold the tube holder in place with your free hand during
stretching. The arrow should point away from the flow meter (or downward in
the normal configuration). The tube is installed by first inserting the upper end
into the holder then stretching the holder over the lower end of the tube.
Warning
Avoid cuts from broken tubes during this operation.
Caution
Excessive stretching of the tube holder will shorten the useful life of the tube holder.
Take care to install the tube with minimal stretching of the holder.
6) Set the flow rate and start timing the sample as quickly and smoothly as possible.
This may seem difficult at first, but smoothness will come with experience. Start
with a 1-minute test (H2O) first. See table 2 (page 13). Read the center of the
ball.
7) At the end of the time period, immediately read the tube and record the results.
Repeat with the other tubes until all of the desired contaminants have been
monitored. Consult your tube instructions for details on sample time flow rate.
See Section 5.1 (page 22) for tips on sampling.
8) Close the valve on the air bottle and open the flow meter valve to bleed residual
pressure off the Airtec system. Be sure the pressure is completely removed.
9) Disconnect the Airtec regulator/flow meter system and store in a clean dry place.
Do not leave it in the field.
Warning
Do not attempt to remove the Airtec regulator from a breathing air source while the
regulator is under source pressure!
Important
Some bottled breathing air is prepared by blending liquid N2 and liquid O2 at 79% and
21% respectively. Oxygen content should be monitored when this type of breathing air is
used. Nextteq LLC recommends the use of an oxygen tube with pump and sampling bag.
Warning
The Airtec system should be checked for leaks on a routine basis. This may be done by
applying soap solution around the connections. The critical area to check is between the
flow meter and the tube holder. See Section 4.1 (page 21).
SECTION III: Testing Procedure