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Model 9110TH NOx Analyzer Data Acquisition System (DAS) and APICOM
Teledyne Analytical Instruments 175
The SAMPLE PERIOD and REPORT PERIOD intervals are synchronized to the beginning and end
of the appropriate interval of the instruments internal clock.
If SAMPLE PERIOD is set for one minute the first reading would occur at the beginning of the next
full minute according to the instrument’s internal clock.
If the REPORT PERIOD is set for of one hour, the first report activity would occur at the beginning of
the next full hour according to the instrument’s internal clock.
EXAMPLE:
Given the above settings, if DAS parameters are activated at 7:57:35 the first sample would occur at 7:58
and the first report would be calculated at 8:00 consisting of data points for 7:58. 7:59 and 8:00.
During the next hour (from 8:01 to 9:00), the instrument will take a sample reading every minute and
include 60 sample readings.
7.1.3.5. Report Periods in Progress when Instrument Is Powered Off
If the instrument is powered off in the middle of a REPORT PERIOD, the samples accumulated during
that period are lost. Once the instrument is turned back on, the DAS restarts taking samples and