Teledyne 6712FR manual Distribution, Sequential, Bottles Per Sample, Samples Per Bottle, Composite

6712FR Refrigerated Sampler Section 4 Standard Programming

4.5 Distribution

The flow meter or flow logger sends the same pulse for both flow and trigger pacing, and the sampler cannot distinguish between them. Therefore, to program a sampler for trigger pacing, simply program it for flow pacing.

Distribution describes how the sampler is to deposit samples. A sample is the volume of liquid deposited in a bottle. A sample event includes the full sampling cycle and may deposit a sample into more than one bottle.

In standard programming, you can program the sampler for these different distribution methods:

• Sequential

• Bottles Per Sample

• Samples Per Bottle

• Composite

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.

4.5.5Continuous 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.

The figure on the next page steps through the programming screens for sequential, bottles per sample, and samples per bottle distribution.

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