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Model 9110TH NOx Analyzer Data Acquisition System (DAS) and APICOM
Teledyne Analytical Instruments 163
7. DATA ACQUISITION SYSTEM (DAS) AND APICOM
The 9110T analyzer contains a flexible and powerful, internal data acquisition system (DAS) that
enables the analyzer to store concentration and calibration data as well as a host of diagnostic
parameters. The DAS feature of the 9110T can store up to one million data points, which can,
depending on individual configurations, cover days, weeks or months of valuable measurements. The
data records are stored in non-volatile memory and are retained even when the instrument is powered
off. Data are stored in plain text format for easy retrieval and use in common data analysis programs
(such as electronic spreadsheets).
The DAS is designed to be flexible, users have full control over the type, length and reporting time of the
data. The DAS permits users to access stored data through the instrument’s front panel or remotely
through its communication ports.
The principal use of the DAS is logging data for trend analysis and predictive diagnostics, which can
assist in identifying possible problems before they affect the functionality of the analyzer. The
secondary use is for data analysis, documentation and archival in electronic format.
To support the DAS functionality, Teledyne offers APICOM, a program that provides a visual interface
for remote or local setup, configuration and data retrieval of the DAS. Using APICOM, data can even be
retrieved automatically to a remote computer for further processing. The APICOM manual, included
with the program, contains a more detailed description of the DAS structure and configuration and is
briefly described in this document.
The 9110T is configured with a basic DAS configuration already enabled. The data channels included in
this basic structure may be used as is or temporarily disabled for later or occasional use.
The green SAMPLE LED on the instrument front panel, which indicates the analyzer status, also
indicates certain aspects of the DAS status:
Table 7-1: Front Panel LED Status Indicators for DAS
LED STATE DAS Status
OFF
System is in calibration mode. Data logging can be enabled or disabled for this mode. Calibration
data are typically stored at the end of calibration periods, concentration data are typically not
sampled, diagnostic data should be collected.
BLINKING
Instrument is in hold-off mode, a short period after the system exits calibrations. DAS channels can
be enabled or disabled for this period. Concentration data are typically disabled whereas diagnostic
should be collected.
ON Sampling normally.
IMPORTANT
IMPACT ON READINGS OR DATA
DAS operation is suspended whenever its configuration is edited using
the analyzer’s front panel and therefore data may be lost. To prevent
such data loss, it is recommended to use the APICOM graphical user
interface for DAS changes (Section 7.2.1).
Please be aware that all stored data will be erased if the analyzer’s disk-
on-module or CPU board is replaced or if the configuration data stored
there is reset.