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T400 Ozone Analyzer Operator’s Manual Data Acquisition system (DAS) and APICOM
157
7.3. 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 20 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 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 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-DETMES
Any available parameter
(see Appendix A-5).
REPORT PERIOD
The amount of time between each channel data
point.
000:01:00
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 6.12.)
06870C DCN6332