Activating A Sequence With The External Digital Control Inputs; Activating A Sequence Or Defaulting To Control Other Devices; Activating A Sequence As A Subprocess In Another Sequence; Activating A Sequence Through A Communications Interface - Teledyne T750 User Manual

Activating a Sequence with the External Digital Control Inputs

This method triggers the sequence from an external control source that was electrically
connected per the instructions in Section 2.4.1.4, so that the calibrator can operate in a slave
mode. To enable the Input CC feature, navigate to the Setup>Sequences menu, select the
sequence by name and in the Input CC field check the Enable box. Press the Edit button to
either view or change the switch settings. (Refer to Section 3.3.7 and Table 3-2 for
configuration information).

Activating a Sequence or Defaulting to Control Other Devices

This method triggers the sequence to set or reset the calibrator's digital control outputs. It
is very useful in situations where the control outputs are being used to trigger other devices
that need to be turned off and on in synch with the operation of the calibrator as it
progresses through the sequence. To enable this feature, navigate to the Setup>Sequences
menu, select the sequence by name and in the Output CC field check the Enable box. Press
the Edit button to either view or change the switch settings. (Refer to Section 3.3.7 and
Table 3-2 for configuration information).

Activating a Sequence as a Subprocess in another Sequence

This method is a way of nesting other often-used operations (subprocesses) within a
sequence. Subprocess are sequences that can be reused rather than be recreated for other
new sequences. Create the subprocess as sequence through the Setup>Sequences menu;
then insert it as a nested sequence while creating or editing the "overhead" sequence with
the EXECSEQ step.

Activating a Sequence through a Communications Interface

This is a method that is carried out through remote communication control. See Section 5.
G
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The 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 T750/T750U
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 T750/T750U includes support for Dasibi "Dot"
serial data commands and operational "LEVELs". (For more information on the LEADS
system, please go to http://www.meteostar.com/).
The Dasibi "Dot" commands form a text-based (ASCII) data protocol that is transmitted
between a control computer, such as a XENO data logger, 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
083730750B DCN8606
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UTOMATIC
U LEADS L
PERATION SING EVELS
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