XL™ Series
Introduction 1-3
communications as well as common telemetry equipment. The XL™ Series is also specially
designed to operate with the H-355 Gas Purge System (Bubbler) for high accuracy pressure
measurement.
1.3.1 SDI-12 Sensor Mode
The XL™ will respond as a sensor to SDI-12 commands sent from an external data logger.
During normal SDI-12 communication, an external data logger issues commands to sensors
attached to the SDI-12 data bus. The command includes a sensor address and a command for the
sensor to perform. All of the sensors attached to the bus will wake up and receive the command,
but only the sensor with the matching address will respond to the command, and all of the other
sensors will return to a low power mode. Details on the SDI-12 commands and responses
supported by the XL™ can be found in Appendix B. When used as an SDI-12 sensor, the main
setup options that may need to be changed are the XL™ sensor address and the data parameters
that will be returned. In several applications, the factory defaults will allow the XL™ to be used
as a sensor ‘out of the box’. Detailed information on the XL™ SDI-12 sensor setup is given in
later chapters.
1.3.2 Data Logger / DCP Master Mode
This mode of operation allows the XL™ to log data at a user-defined interval. The data is stored
internally in non-volatile memory. There are several ways to retrieve data from the XL™.
!
The data can be copied to an industry standard ATA FLASH Memory Card.
!
The data can be downloaded through the serial port of the XL™ to the hard disk of a PC,
(via direct connection or modem connection).
!
Data can be transmitted through the GOES system for near real time operation.
The data recorded to the internal memory is stored as ASCII text with a tabular format ready to
be imported into a spreadsheet, a word processor, decodes, etc. Data options for downloading the
recorded data to an external industry standard ATA FLASH memory card are explained in
chapter 20. Information on accessing the XL™ through the serial port is given in chapter 4, and a
detailed explanation of the GOES operations for retrieving data are given in chapter 16.
1.3.3 Operation Using Auxiliary Outputs
The XL™ can be setup to provide various outputs based on any of the sensor input values. The
Sensor data can be output as a 4 to 20 mA signal, as a quadrature output signal, as ASCII text, or
encoded in a special format for transmission using telemetry equipment. This allows the XL™ to
be compatible with industrial equipment that does not support the SDI-12 protocol. The serial
ports on the XL™ enable it to operate with a GOES Transmitter, a data or voice modem, an
ALERT/IFLOWS radio system, etc. The Digital I/O pins may be configured as outputs in order
to drive an external device through a relay, or to simulate a quadrature shaft encoder output.
Summary of Contents for H-350XL
Page 1: ...XL Series Models H 350XL H 500XL H 510XL H 522 H 522 Plus Owner s Manual ...
Page 30: ...2 16 Hardware Options and Installation XL Series ...
Page 42: ...3 12 Using The Built In Keypad Display XL Series ...
Page 46: ...4 4 PC Menu Interface Operation XL Series ...
Page 58: ...5 12 Miscellaneous System Setup XL Series ...
Page 66: ...6 8 Serial Port Options XL Series ...
Page 74: ...7 8 System Configuration Files XL Series ...
Page 84: ...8 10 System Status Menus Options XL Series ...
Page 88: ...9 4 Scanning Options XL Series ...
Page 156: ...15 12 Logging Options XL Series ...
Page 198: ...16 42 Operation with the GOES Radio XL Series ...
Page 216: ...19 6 Alarm Call Out XL Series ...
Page 234: ...21 8 Operation with the H 355 Smart Gas System XL Series ...
Page 246: ...22 12 Functions XL Series ...