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Model 9110T NOx Analyzer Data Acquisition System (DAS) and APICOM
Teledyne Analytical Instruments 176
temporarily stores 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, SDEV, MIN or MAX calculation.
The STORE NUM SAMPLES feature will also report the number of sample readings taken since the
instrument was restarted.
7.1.3.6. Editing the Number of Records
The number of data records in the DAS is limited to about a cumulative one million data points in all
channels (one megabyte of space on the DOM). However, the actual number of records is also limited
by the total number of parameters and channels and other settings in the DAS configuration. Every
additional data channel, parameter, number of samples setting etc. will reduce the maximum amount of
data points. In general, however, the maximum data capacity is divided amongst all channels (max: 20)
and parameters (max: 50 per channel).
The DAS will check the amount of available data space and prevent the user from specifying too many
records at any given point. If, for example, the DAS memory space can accommodate 375 more data
records, the ENTR button will disappear when trying to specify more than that number of records. This
check for memory space may also make an upload of a DAS configuration with APICOM or a terminal
program fail, if the combined number of records would be exceeded. In this case, it is suggested to
either try to determine what the maximum number of records available is using the front panel interface
or use trial-and-error in designing the DAS script or calculate the number of records using the DAS or
APICOM manuals.
To set the NUMBER OF RECORDS, follow the instruction shown in Section 7.1.3 then press: