Teledyne Distribution, 6712FR Refrigerated Sampler Extended Programming, 5.10.1, Sequential

6712FR Refrigerated Sampler Section 5 Extended Programming

5.10 Distribution

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. You can program the sampler for five distribution methods:

•Sequential

•Bottles per sample

•Samples per bottle

		•	Composite
		•	Multiple Bottle Compositing
5.10.1	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.
5.10.2	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.
5.10.3	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.
5.10.4	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.
5.10.5	Multiple Bottle	Multiple bottle compositing is a combination of
	Compositing	bottles-per-sample and samples-per-bottle. At each sample event,
		the sampler deposits a sample into a set of bottles. It moves to a
		new bottle set only after each bottle of the first set contains the
		programmed number of samples. Use multiple-bottle compos-
		iting to collect identical sets of composite samples or a composite
		sample that is larger than the capacity of a single bottle. Mul-
		tiple bottle compositing is available only in extended pro-
		gramming.
5.10.6	Time Switching	In extended programming, the sampler offers an additional dis-
		tribution feature, time switching. This feature determines when
		the sampler fills the next bottle or bottle set, and may be used
		with time-paced or flow-paced sample programs. Time switching
		distribution occurs at regular intervals (as programmed in

screen 3 in the margin). The switch times are relative to the pro- grammed “FIRST SWITCH TIME” (screen 4).

Switch times occur regardless of the state of the sampler. Be aware that the sampler may leave empty bottles if it becomes disabled. Pause and resumes are an exception; the sampler will not switch bottles during a pause if the current bottle is empty.

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