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Teledyne API – Model T300/T300M CO Analyzer Data Acquisition System (DAS) and APICOM
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7.1.1. DAS DATA CHANNELS
The key to the flexibility of the DAS is its ability to store a large number of
combinations of triggering events and data parameters in the form of data channels.
Users may create up to 50 data channels and each channel can contain one or more
parameters. For each channel, the following are selected:
One triggering event is selected.
Up to 50 data parameters, which can be the shared between channels.
Several other properties that define the structure of the channel and allow the user
to make operational decisions regarding the channel.
Table 7-2: DAS Data Channel Properties
PROPERTY DESCRIPTION
DEFAULT
SETTING
SETTING RANGE
NAME
The name of the data channel.
“NONE”
Up to 6 letters or digits
1.
TRIGGERING
EVENT
The event that triggers the data channel to measure
and store the datum.
ATIMER
Any available event
(see Appendix A-5).
NUMBER AND
LIST OF
PARAMETERS
A User-configurable list of data types to be
recorded in any given channel.
1
(COMEAS)
Any available parameter
(see Appendix A-5).
REPORT PERIOD
The amount of time between each channel data
point.
000:01:00
(1 hour)
000:00:01 to
366:23:59
(Days:Hours:Minutes)
NUMBER OF
RECORDS
The number of reports that will be stored in the data
file. Once the limit is exceeded, the oldest data is
over-written.
100
1 to 1 million, limited by
available storage space.
RS-232 REPORT
Enables the analyzer to automatically report
channel values to the RS-232 ports.
OFF
OFF or ON
CHANNEL
ENABLED
Enables or disables the channel. Allows a channel
to be temporarily turned off without deleting it.
ON
OFF or ON
CAL HOLD OFF
Disables sampling of data parameters while
instrument is in calibration mode
2
.
OFF
OFF or ON
1
More with APICOM, but only the first six are displayed on the front panel.
2
When enabled records are not recorded until the DAS HOLD OFF period is passed after calibration mode. DAS HOLD OFF SET in
the VARS menu (see Section 7.1.11
).
7.1.2. DEFAULT DAS CHANNELS
A set of default Data Channels has been included in the analyzer’s software for logging
CO concentration and certain predictive diagnostic data. These default channels include
but are not limited to:
CONC: Samples CO 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.
PNUMTC: Collects sample flow and sample pressure data at five-minute intervals
and stores an average once a day with a time and date stamp. This data is useful
for monitoring the condition of the pump and critical flow orifice (sample flow) and
the sample filter (clogging indicated by a drop in sample pressure) over time to
predict when maintenance will be required.
The last 360 daily averages (about 1 year) are stored.
06864B DCN6314