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3700 Portable Samplers
Section 3 Programming Guidelines
3.10.5 Sampling
Stop/Resume
3.11 Start Times
3.11.1 Events Preceding
Sampling Routine
3-62
The Stops and Resumes settings are available only when you
have enabled the Sampling Stop/Resume configure option. You
must first enter the number of stops and resumes, from 0 to 24.
(Enter 0 if you want to omit the stop and resume settings without
returning to the configure sequence and disabling the Stops and
Resumes option.) Then enter the stop and resume clock times.
The first entry will be a stop time. Refer to the Key Times section
of Figure 3-12, Display #s 100, 101, and 102.
Determining the Number of Samples With Stops and
Resumes – When using stops and resumes, determining the
number of samples you want deposited in the container requires
a little planning. With a time-paced routine, the 3700 will always
take a sample automatically at the start time. It will not take a
sample at the stop time unless you have selected "ENABLE" in
the Sample at Stop Time display of the Sampling Stops and
Resumes configure option, even if the stop time falls at a
scheduled sample event time. No sample will be taken at the
resume time unless you have selected "ENABLE" in the Sample
at Resume display of the Sampling Stops and Resumes option.
When you are using Stops and Resumes with flow-paced rou-
tines, the 3700 will not take a sample at the start time, unless
you have configured the sampler to do so in the Flow Mode Sam-
pling configure option. With flow-paced routines, no sample will
be taken at the stop time unless you have selected "ENABLE" in
the Sample at Stop Time display of the Sampling Stops and
Resumes option. The 3700 will not take a sample at the resume
time unless you have selected "ENABLE" in the Sample at
Resume display of the Sampling Stops and Resumes option.
This section discusses the sampler's start times. It begins by out-
lining the sequence of events preceding the start time for most
sampling routines.
After programming, you must start the sampling by pressing the
start sampling key. Depending on the program and configure
option settings, the sampling routine may not start at soon as
you press the key. The "Delay to Start Time" is the period
between the time you press start sampling and the start time for
the routine. Figure 3-13 diagrams the sequence of events pre-
ceding the start time.
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