Operating Instructions
Model 200E Instruction Manual
The
REPORT PERIOD
is typically used as the time interval between two permanently
stored data points. The
SAMPLE PERIOD
is set to one minute by default and determines
the frequency of data collection, i.e. how many times the iDAS records a parameter and
stores it in a (volatile) data array for further processing and averaging. In conjunction with
the
REPORT PERIOD
, the
SAMPLE PERIOD
determines the number of data points in each
average value.
If, for example, the NO
X
concentration parameter is configured with a
SAMPLE PERIOD
set
to once per minute (default setting) and the
REPORT PERIOD
set to once per hour, the
resulting data will be hourly, arithmetic means calculated from N=60 data points. Calibra-
tion and hold-off procedures as well as power-outs during that one hour will reduce the
number of records per concentration average. For statistical analysis, the number of records
per average data point for any given parameter within one data channel can also be stored.
Configuring the
SAMPLE PERIOD
and the
REPORT PERIOD
for the same value, for
example once per hour, will result in an instantaneous reading once per hour. This value
would be the same as a reading configured for an instantaneous (
INST
) data type once per
hour instead of an
AVG
type.
SAMPLE PERIOD
and
REPORT PERIOD
are defined to be from the beginning to the end
of the respective clock interval. A one-minute period starts and ends with the full minutes of
the analyzer clock, an hourly period starts and ends with the full hour of the analyzer’s
clock and so on, even if the iDAS data collection was started within those periods. A one-
minute data point, which is the lowest setting for any period, is always an instantaneous
value, even when configured as an
AVG
event (although that data point is internally
averaged over about 30 milli-seconds of analog data readings).
Note on averages in progress when instrument is powered off:
The iDAS is capable of averaging parameters over very long time intervals (
REPORT
PERIOD
up to 366 days). If the instrument is powered off during an averaging interval and
before the average is permanently stored in memory, the samples accumulated so far for
that
REPORT PERIOD
are lost. On the other hand, if the instrument is powered up during
an averaging interval, the iDAS begins averaging samples from that point onward (or after
the hold-off period) until the scheduled end of the
REPORT PERIOD
when the data point is
permanently stored.
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Summary of Contents for 200E
Page 15: ...M200E Documentation Model 200E Instruction Manual USER NOTES xiv 044100102 Rev A ...
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Page 141: ...Calibration Procedures Model 200E Instruction Manual USER NOTES 126 044100102 Rev A ...
Page 203: ...Theory of Operation Model 200E Instruction Manual USER NOTES 188 044100102 Rev A ...
Page 239: ...Troubleshooting Repair Model 200E Instruction Manual USER NOTES 224 044100102 Rev A ...
Page 265: ...APPENDIX A Model 200E Instruction Manual USER NOTES 250 044100110 Rev A ...
Page 271: ...APPENDIX B Model 200E Instruction Manual USER NOTES 256 044100120 Rev A ...
Page 275: ...APPENDIX D Model 200E Instruction Manual 260 044100141 Rev A USER NOTES ...