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Teledyne API - Model T200H/T200M Operation Manual Operating Instructions
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WARNINGS: Some data may be useful when stored if one of several warning
messages appears. This is helpful for trouble-shooting by monitoring when a
particular warning occurred.
4.7.2. DEFAULT DAS CHANNELS
The T200H/M is configured with a basic DAS 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 DAS 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 DAS changes.
A set of default data channels has been included in the analyzer’s software for logging
nitrogen oxides concentrations, calibration and predictive diagnostic data. They are:
CONC: Samples NO
X
, NO and NO
2
concentration at one minute intervals and
stores an average every hour with a time and date stamp along with the number of
(1-minute) samples within each average(for statistical evaluation). Readings during
calibration and calibration hold off are not included in the data. By default, the last
800 hourly averages are stored.
CALDAT: Every time a zero or span calibration is performed CALDAT logs
concentration, slope and offset values for NO
X
and NO with a time and date stamp.
The NO
X
stability (to evaluate calibration stability) as well as the converter
efficiency (for reference) are also stored. This data channel will store data from the
last 200 calibrations and can be used to document analyzer calibration. The slope
and offset data can be used to detect trends in (instrument response.
CALCHECK: This channel logs concentrations and the stability each time a zero or
span check (not calibration) is finished. This allows the user to track the quality of
zero and span responses over time and assist in evaluating the quality of zero and
span gases and the analyzer’s noise specifications. The last 200 data points are
retained.
DIAG: Daily averages of temperature zones, flow and pressure data as well as
some other diagnostic parameters (HVPS, AZERO). These data are useful for
predictive diagnostics and maintenance of the T200H/M. The last 1100 daily
averages are stored to cover more than four years of analyzer performance.
HIRES: Records one minute, instantaneous data of all active parameters in the
T200H/M. Short-term trends as well as signal noise levels can be detected and
documented. Readings during calibration and the calibration hold off period are
included in the averages. The last 1500 data points are stored, which covers a little
more than one day of continuous data acquisition. This data channel is disabled by
default but may be turned on when needed such as for trouble-shooting problems
with the analyzer.
The default data channels can be used as they are, or they can be customized from the
front panel or through APICOM to fit a specific application. The Teledyne API website
contains this default and other sample DAS scripts for free download. We recommend
that the user backs up any DAS configuration and its data before altering it.
Note Teledyne-API recommends downloading and storing existing data and the
DAS configurations regularly for permanent documentation and future
data analysis. Sending a DAS configuration to the analyzer through its
COM ports will replace the existing configuration and will delete all stored
data.
07270B DCN6512