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BLZZRD Portable Refrigerated Sampler
Section 4 Standard Programming
4-8
In standard programming, you can program the sampler for
these different distribution methods:
• Sequential
• Bottles Per Sample
• Samples Per Bottle
• Composite
Figure 4-1 illustrates the programming screens for sequential,
bottles per sample, and samples per bottle distribution.
4.5.1 Sequential
In sequential distribution, the sampler deposits one sample in
each bottle. A sequential sample represents a “snapshot” of the
flow stream at a point in time.
4.5.2 Bottles Per Sample
In bottles per sample distribution, the sampler deposits a sample
in each of a set of bottles. A bottle set includes at least two bottles
but may include all bottles. Use bottles per sample when the
volume to be collected is larger than the amount one bottle can
hold or when you need identical samples.
4.5.3 Samples Per Bottle
In samples per bottle distribution, the sampler deposits samples
from several sample events in a single bottle before moving to the
next bottle. Use samples per bottle distribution to collect a series
of small composite samples.
4.5.4 Composite
For single bottle configurations, samples per bottle distribution
is known as composite sampling. A composite sample represents
an average of the flow stream’s characteristics during the sam -
pling period.
4.5.5 Continuous Sampling
Sample programs can be run indefinitely by selecting “YES” at
the “RUN CONTINUOUSLY?” screen. Continuous sampling
resets the distribution when the distribution sequence is com-
plete. That is, when the last bottle/set is reached, the next
bottle/set is the first bottle/set. All pacing modes except
RANDOM are supported.
When running a program continuously, the bottles must be ser-
viced at regular intervals to prevent overfilling the bottles. The
sampler assumes that the next bottle/set is empty and ready to
receive samples.
4.6 Start Times
It is important to understand the difference between the time at
which you run a program and the program’s start time. Running
a program simply means selecting RUN from the sampler’s main
menu. The start time is the time at which the sampler begins the
program’s first sample interval countdown. The start time is con -
trolled by your selections from the start time screens.
Each program contains start-time settings that tell the sampler
when to begin the program. When programming the sampler, you
can select one of three start time options: NO DELAY TO START,
DELAYED START, or CLOCK TIME.