Teledyne 9110T instruction manual DAS Structure, DAS Channels

Model 9110T NOx Analyzer Data Acquisition System (DAS) and APICOM

Note	The DAS can be disabled only by disabling or deleting its individual data
	channels.

7.1. DAS STRUCTURE

The DAS is designed around the feature of a “record”. A record is a single data point. The type of data captured in a record are defined by two properties:

∙PARAMETER type that defines the kind of data to be stored (e.g. the average of O3 concentrations measured with three digits of precision). See Section 7.1.3.3.

∙A TRIGGER event that defines when the record is made (e.g. timer; every time a calibration is performed, etc.). See Section 7.1.3.2.

The specific PARAMETERS and TRIGGER events that describe an individual record are defined in a construct called a DATA CHANNEL (see Section 7.1.3). Each data channel relates one or more parameters with a specific trigger event and various other operational characteristics related to the records being made (e.g. the channels name, number or records to be made, time period between records, whether or not the record is exported via the analyzer’s RS-232 port, etc.).

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, the following are selected:

∙one triggering event

∙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 RANGE
		SETTING
NAME	The name of the data channel.	“NONE”	Up to 6 letters or digits1.
TRIGGERING	The event that triggers the data channel to	ATIMER	Any available event
EVENT	measure and store the datum.		(see Appendix A-5).
NUMBER AND	A user-configurable list of data types to be	1	Any available parameter
LIST OF
	recorded in any given channel.	(PMTDET)	(see Appendix A-5).
PARAMETERS
	The amount of time between each channel data	000:01:00	000:00:01 to
REPORT PERIOD			366:23:59
	point.	(1 hour)
			(Days:Hours:Minutes)
NUMBER OF	The number of reports that will be stored in the	100	1 to 1 million, limited by
	data file. Once the limit is exceeded, the oldest
RECORDS			available storage space.
	data is over-written.
RS-232 REPORT	Enables the analyzer to automatically report	OFF	OFF or ON
	channel values to the RS-232 ports.

Teledyne Analytical Instruments 164