Teledyne 9110T instruction manual Interface for DAS changes Section, There is reset, LED State

Model 9110TH NOx Analyzer Data Acquisition System (DAS) and APICOM

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
	System is in calibration mode. Data logging can be enabled or disabled for this mode. Calibration
OFF	data are typically stored at the end of calibration periods, concentration data are typically not
	sampled, diagnostic data should be collected.
	Instrument is in hold-off mode, a short period after the system exits calibrations. DAS channels can
BLINKING	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.

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