Teledyne T200, Operation Manual, Page: 152 / 425

Data Acquisition System (DAS) and APICOM Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual
150
7.1.1.1. DEFAULT DAS CHANNELS
A set of default Data Channels has been included in the analyzer‟s software for logging
NO
x
, NO and NO
2
concentrations as well as certain predictive diagnostic data. For the
software revision being shipped with the T200 at the time of this writing, these default
channels are:
CONC: Samples NOx concentration at one minute intervals and stores an average every
hour with a time and date stamp. Readings during calibration and calibration hold off
are not included in the data.

By default, the last 800 hourly averages are stored.
CALDAT: Logs new slope and offset of NO
X
and NO measurements every time a zero
or span calibration is performed and the result changes the value of the slope (triggering
event:
SLPCHG ). The NO
X
stability (to evaluate if the calibration value was stable) as
well as the converter efficiency (for trend reference) are also stored.

This data channel will store data from the last 200 calibrations and can be used to
document analyzer calibration and is useful for detect trends in slope and offset
(instrument response) when performing predictive diagnostics as part of a regular
maintenance schedule (See Section 11.1).

The CALDAT channel collects data based on events (e.g. a calibration operation)
rather than a timed interval and therefore does not represent any specific length of
time. As with all data channels, a date and time stamp is recorded for every logged
data point.
CALCHECK: This channel logs concentrations and the stability each time a zero or
span check (not calibration) is finished (triggered by exiting any calibration menu).

The data of this channel enable 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
STABIL
parameter documents if the analyzer response was stable at the point
of the calibration check reading. 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 ).

This data is useful for predictive diagnostics and maintenance of the T200.

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 T200.
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.
These default data channels can be used as they are, or they can be customized from the
front panel to fit a specific application. They can also be deleted to make room for
custom user-programmed Data Channels.
06858E DCN7057