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Advanced FEATURES of the M400E analyzer M400E Ozone Analyzer Operator’s Manual
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 were 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 were 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 iDAS were 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.
NOTE
In AVG, MIN or MAX sample modes (see Section 7.1.5.3), the settings for the SAMPLE PERIOD and the
REPORT PERIOD determine the number of data points used each time the average, minimum or
maximum is calculated, stored and reported to the COMM ports.
The actual sample readings are not stored past the end of the of the chosen REPORT PERIOD.
When the STORE NUM SAMPLES feature is turned on, the instrument will store how many sample
readings were used to compute the AVG, MIN or MAX.
7.1.5.5. 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 so far during that
period are lost. Once the instrument is turned back on, the iDAS restarts taking samples and temporarily them in
volatile memory as part of the
REPORT PERIOD currently active at the time of restart. At the end of this
REPORT PERIOD,
only the sample readings taken since the instrument was turned back on will be included in
any AVG, MIN or MAX calculation. Also, the
STORE NUM SAMPLES feature will report the number of sample
readings taken since the instrument was restarted.
88 04315 Rev. C1