Filter
Top Products
Teledyne API - Model 200EH/EM Operation Manual Operating Instructions
73
6.7.2.5. Sample Period and Report Period
The iDAS defines two principal time periods by which sample readings are taken and permanently recorded:
SAMPLE PERIOD: Determines how often iDAS temporarily records a sample reading of the parameter
in volatile memory. The
SAMPLE PERIOD is set to one minute by default and generally cannot be
accessed from the standard iDAS front panel menu, but is available via the instruments communication
ports by using APICOM or the analyzer’s standard serial data protocol.
SAMPLE PERIOD
is only used when the iDAS parameter’s sample mode is set for AVG, MIN or MAX.
REPORT PERIOD: Sets how often the sample readings stored in volatile memory are processed, (e.g.
average, minimum or maximum are calculated) and the results stored permanently in the instruments
Disk-on-Chip as well as transmitted via the analyzer’s communication ports. The
REPORT PERIOD
may be set from the front panel.
If the
INST sample mode is selected the instrument stores and reports an instantaneous reading of the
selected parameter at the end of the chosen
REPORT PERIOD
In
AVG, MIN or MAX sample modes, 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.
Also, 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.
When the
STORE NUM. SAMPLES feature is turned on the instrument will also store how many sample
readings were used for the
AVG, MIN or MAX calculation but not the readings themselves.
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.
04521C (DCN5731)