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Teledyne API T803 CO2/O2 Analyzer Operation Manual Data Acquisition System (DAS & APICOM
131
7.1.2.1. DAS 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
(PMTDET)
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
Configuration-dependent,
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 HOLDOFF period is passed after calibration mode. DAS HOLDOFF SET in the
VARS menu (see Section
5.5.)
7.1.3. DEFAULT DAS CHANNELS
CONC: Samples CO
2
and O
2
concentrations at one-minute intervals and stores an
average every five minutes with a time and date stamp. Readings during
calibration and calibration HOLD OFF are not included in the data..
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.
07276B DCN6418