TELEDYNE API
M703E Calibrator Operator’s Manual Operating the M703E Calibrator

6.12. SETUP LVL: SETTING UP AND USING LEADS (DASIBI)

OPERATING LEVELS

6.12.1. GENERAL INFORMATION ABOUT LEADS LEVELS

The M703E calibrator can be equipped with a version of firmware that includes support for LEADS, a data
collection and analysis system LEADS 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 an M703E calibrator is equipped with the optional LEADS software is used in conjunction
with data loggers located central data analysis facility 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 M703E includes support for Dasibi “Dot” serial data commands and operational “LEVEL’s”.

NOTE

For more information on the LEADS system, please go to http://www.meteostar.com/.

6.12.2. DOT COMMANDS

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 T-API customer service.
An M703E equipped with LEADS software can be simultaneously operated over the same COM port using
standard Teledyne Instruments’ 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.

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