Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 103)

Model 9110EH Instruction Manual Operating Instructions
6.10. Setup - Data Acquisition System (DAS)
The M9110EH analyzer contains a flexible and powerful, internal data acquisition system
(iDAS) that enables the analyzer to store concentration and calibration data as well as a
host of diagnostic parameters. The iDAS of the M9110EH can store up to about one million
data points, which can, depending on individual configurations, cover days, weeks or
months of valuable measurements. The data 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 spreadsheet-type
programs).
The iDAS is designed to be flexible, users have full control over the type, length and
reporting time of the data. The iDAS permits users to access stored data through the
instrument’s front panel or its communication ports. Using APICOM, data can even be
retrieved automatically to a remote computer for further processing.
The principal use of the iDAS 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 iDAS functionality, TAI offers APICOM, a program that provides a visual
interface for remote or local setup, configuration and data retrieval of the iDAS
(Section 6.11). The APICOM manual, which is included with the program, contains a more
detailed description of the iDAS structure and configuration, which is briefly described in
this section.
The M9110EH is configured with a basic iDAS configuration, which is enabled by default. New
data channels are also enabled by default but each channel may be turned off for later or
occasional use. Note that iDAS operation is suspended while its configuration is edited
through the front panel. To prevent such data loss, it is recommended to use the APICOM
graphical user interface for iDAS changes.
The green SAMPLE LED on the instrument front panel, which indicates the analyzer status,
also indicates certain aspects of the iDAS status:
Table 0-19: Front Panel LED Status Indicators for iDAS
LED State iDAS 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. IDAS channels can be enabled or disabled for this period.
Concentration data are typically disabled whereas diagnostic should be
collected.
On Sampling normally.
The iDAS can be disabled only by disabling or deleting its individual data channels.
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