Filter
Top Products
Overview of Operating Modes and Basic Operation Teledyne API – Model T700 Dynamic Dilution Calibrator
166
4.11. SETUP LVL: SETTING UP AND USING LEADS (DASIBI)
OPERATING LEVELS
4.11.1. GENERAL INFORMATION ABOUT LEADS LEVELS
The T700 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 T700 calibrator is equipped with the optional LEADS software used in conjunction
with data loggers located in the 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 T700 includes support for Dasibi “Dot” serial data
commands and operational “LEVELs”.
It also includes a method for driving external devices via contact closure control outputs
in conjunction with an optional bolt-on valve driver assembly (see Section 3.3.1.6).
Note
For more information on the LEADS s
ystem, please go to
http://www.meteostar.com/.
4.11.2. 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 Teledyne API’S Customer
Service.
A T700 equipped with LEADS software can be simultaneously operated over the same
COMM port using standard Teledyne API’s serial data commands and is compatible
with APICOM versions 5 and later which include an added feature that allows a user to
edit, upload and download level tables.
06873B DCN6388