LiQuilaz II E and S Operations Manual
Page B-1
Appendix B
RS-485 Communication Protocol
The LiQuilaz II Liquid Particle Counter is a smart sensor designed to measure particles
in liquids. To accommodate fast histogram displays and remote data collection
functions the LiQuilaz II Liquid Particle Counter supports both the Fast and Slow
communication protocols. A description of the protocols is covered in the following
sections.
Operation Commands
The following is a presentation of typical command sequences that are processed to
perform specific operations. The operations may be one-time command sequences
(i.e., instrument initialization) or command sequences that are performed repeatedly
(i.e., polling for data). A detailed explanation of each command is contained in the
protocol section.
Instrument Initialization
The following command sequence is typical during initialization or re-initialization of
the instrument:
CSR CDT CMODE
This sequence does the following:
• Performs a software reset
• Sets the current date/time into the instrument
• Sets the instrument into the correct operational mode
NOTE:
The operational mode should be set to 1 for regular time-based operation. If the
mode is set to other than 1, it is assumed the sensor is attached to an SLS Family
sampler or CLS-700.
