Teledyne gfc 7000ta operation manual DAS Structure, DAS Channels, DAS Data Channel Properties

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.1. DAS Structure

The DAS is designed around the feature of a “record”. A record is a single data point of one parameter, stored in one (or more) data channels and generated by one of several triggering event. The entire DAS configuration is stored in a script, which can be edited from the front panel or downloaded, edited and uploaded to the instrument in form of a string of plain-text lines through the communication ports.

DAS data are defined by the PARAMETER type and are stored through different triggering EVENTS in data CHANNELS, which relate triggering events to data parameters and define certain operational functions related to the recording and reporting of the data.

6.7.1.1. 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 20 data channels and each channel can contain one or more parameters. For each channel one triggering event is selected and up to 50 data parameters, which can be the same or different between channels. Each data channel has several properties that define the structure of the channel and allow the user to make operational decisions regarding the channel (Table 6-7).

Table 6-7: DAS Data Channel Properties

PROPERTY	DESCRIPTION	DEFAULT	SETTING RANGE
NAME	The name of the data channel.	“NONE”	Up to 6 letters and digits
			(more with APICOM, but
			only the first six are
			displayed on the front
			panel).
TRIGGERING	The event that triggers the data channel to measure	ATIMER	See Appendix A-5 For a
EVENT	and store its data parameters. See APPENDIX A-5		complete list.
	for a list of available triggering events.
NUMBER &	A user-configurable list of data types to be recorded	1 – DETMES	See Appendix A-5 For a
PARAMETER	in any given channel. See APPENDIX A-5 for a list		complete list.
LIST	of available parameters
STARTING	The starting date when a channel starts collecting	01-JAN-03	Any actual date in the past
DATE	data		or future.
SAMPLE	The amount of time between each data point that is	000:01:00	000:00:01 to 366:23:59
PERIOD	averaged into one mean reported every REPORT		(Days:Hours:Minutes)
	PERIOD.
REPORT	The amount of time between each channel data	000:01:00	000:00:01 to
PERIOD	point.		366:23:59
			(Days:Hours:Minutes)
NUMBER OF	The number of reports that will be stored in the data	100	1 to 1 million, limited by
RECORDS	file. Once the specified limit has been exceeded,		available storage space.
	the oldest data are over-written to make space for
	new data.
RS-232	Enables the analyzer to automatically report channel	OFF	OFF or ON
REPORT	values to the RS-232 ports.
CHANNEL	Enables or disables the channel. Provides a	ON	OFF or ON
ENABLED	convenient means to temporarily disable a data
	channel.
CAL HOLD OFF	Disables sampling of data parameters while	OFF	OFF or ON
	instrument is in calibration mode.		(Section 6.7.2.11.)
	When enabled here – there is also a length of the
	DAS HOLD OFF after calibration mode, which is set
	in the VARS menu.

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