Bronkhorst LIQUI-FLOW mini (from 01-07-2013) - Manual (Page 9)

LIQUI-FLOW™ mini © 2013 Bronkhorst High-Tech BV
Bronkhorst High-Tech BV
9
2.8 Analog / digital operation
Analog operation
For analog operation refer to the “Hook-up diagram LIQUI-FLOW TM mini” or use
an RJ45 loose-end cable (7.03.419) to connect the required signals.
Digital RS232 operation
Digital operation over RS232 can be established
when using the following setup. Using a RS232
cable or a USB-RS232 converter with a PC will
allow you to use (free) Bronkhorst® software for
Windows, such as FlowDDE and FlowPlot. See
also section 3.4.
Digital RS485 operation
With digital operation over RS485 a bus-system with multiple instruments can be set up. See section 3.5 for possible
systems.
2.9 Multi-functional switch operation
Micro-switch operation (single channel versions only)
Using the micro-switch on the instruments, several actions can be monitored and
started. The green LED is used for status indication. The red LED is used for
errors/warnings/messages. The micro-switch can be used to start several
actions, such as auto-zero, restore factory settings and bus-initialisation actions,
if applicable. See specific zero-procedure below and section 3.3 for more details.
2.10 Purging
When applying pressure to the system, avoid pressure shocks in the system and increase pressure gradually. Also
decrease pressure gradually when required.
In systems for use with toxic or other dangerous fluids, purging for at least 30 minutes with an inert fluid is
absolutely necessary before use. After use with toxic or other dangerous fluids, complete purging is also required
before exposing the system to air.
Waste fluid
Make sure not to spill fluid on the instrument while purging.
Always keep the sensor exterior dry.
Warm-up time
Let the LIQUI-FLOW TM mini warm-up for at least 30 minutes for best accuracy. During warm-up period, fluid pressure