Operating the Calibrator Teledyne API T703/T703U Calibrator Operation Manual
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4.12. SETUP > LVL: SETTING UP AND USING LEADS
(DASIBI) OPERATING LEVELS
GENERAL INFORMATION ABOUT LEADS LEVELS 4.12.1.
The T703 calibrator can be equipped with a version of firmware that includes
support for LEADS, a data collection and analysis system specifically designed
for handling meteorological and environmental data, particularly when there is a
need to integrate data and control instrumentation from several different
manufacturers. When a T703 calibrator is equipped with the optional LEADS
software used in conjunction with data loggers located in a central data analysis
facility, it is possible to collect and buffer data between the various calibrators,
analyzers and metrological equipment remotely located at an air monitoring
station.
Because LEADS was originally developed for use with TNRCC using Dasibi
5008 calibrators, the LEADS version of the T703 includes support for Dasibi
“Dot” serial data commands and operational “LEVELs”.
NOTE
For more information on the LEADS system, please go to http://www.meteostar.com/.
DOT COMMANDS 4.12.2.
The Dasibi “Dot” commands form a text-based (ASCII) data protocol that is
transmitted between a control computer (XENO data logger in this case) and a
calibrator or ambient gas analyzer over an RS-232 connection. The details of the
protocol are beyond the scope of this document, but in its simplest form the
protocol is based on a two or three digit integer preceded by a control-A and a
period (.) and then followed by a “!” and a two digit checksum.
EXAMPLE:
^A.xxx!nn
For further information on dot commands, please contact TAPI Technical
Support.
A T703 equipped with LEADS software can be simultaneously operated over the
same COM port using standard Teledyne API‟s serial data commands and is
compatible with APICOM versions 3.7.3 and later which include an added
feature that allows a user to edit, upload and download level tables.
LEVELS 4.12.3.
A LEVEL is a combination of several parameters:
An ID number for the LEVEL
An action, (e.g. GENERATE, STANDBY)
A target concentration value
An output flow rate (if applicable)
Configuration for one or both of two status output blocks.
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