c. Fieldbus operation (RS485)
With digital operation over RS485 a bus-system with multiple instruments can be set up. Refer to the “Instruction
Manual IQ+FLOW® series” for possible systems.
8
a. Multifunctional micro switch operation (single-channel versions
only)
Using the 2 LEDs and the switch on the IQ+FLOW®, several actions can be
monitored and started. The green LED is used for status indication. The red
LED is used for error and warning messages. The switch can be used to
execute several functions, such as auto-zero and restoring factory settings.
See the IQ+FLOW® manual (document number 9.17.045) for details.
b. Rotary switch operation (multi-channel versions only)
Select the communication type and Baud rate with the “COMM. TYPE”
switch. Select the node address with the “MSD” and “LSD” switch (e.g. MSD
= 1 and LSD = 9 selects node 19 for channel 1, but also node 20 and 21 for
channels 2 and 3). See section 3.3 of the Instruction Manual for more
details.
Unless specified otherwise, the IQ+FLOW® instrument is set for RS232 communication at 38k4 baud on node
address 03 by default.
Do not apply pressure until electrical connections are made. When applying pressure to the system, avoid pressure
shocks in the system and increase pressure gradually. Also decrease pressure gradually when required.
9
Purging
In systems for use with corrosive or reactive media, purging for at least 30 minutes with a dry, inert gas (like
Nitrogen or Argon) is absolutely necessary before use. After use with corrosive, reactive or hazardous media (e.g.
toxic or flammable), purging is also necessary before the system is exposed to air.
Warm-up time
For accurate measurement, it is recommended to warm up the instrument for at least 30 minutes. This can be done
with or without media flow (e.g. while purging).
10
Zeroing (only flow meters/controllers)
The zero point of each flow meter is factory adjusted. If required the zero point can be re-adjusted over RS232 or by
means of using the multifunctional switch. Procedure for zeroing by-micro switch:
·
Warm up and pressurize the system and fill the instrument according to the process conditions.
·
Make sure no flow is going through the instrument, by closing valves near the instrument.
·
The setpoint must be zero.
·
Press the multifunctional switch and hold it. After a short time, the red LED will go ON and OFF, then the green
LED will turn ON. At that moment, release the switch.
·
The zeroing procedure will start at that moment and the green LED will blink fast. The zeroing procedure waits
for a stable signal and saves the zero. If the signal is not stable, zeroing will take long and the nearest point to
zero is accepted. The procedure will take approximately 10 seconds.
·
When the indication is showing 0% signal and the green indication LED is glowing continuously again, then the
zeroing action was successful.
Your
IQ+FLOW®
is now ready for operation.
Bronkhorst High-Tech B.V., Nijverheidsstraat 1a, NL-7261AK Ruurlo, The Netherlands
T
+31(0)573 45 88 00
F
+31(0)573 45 88 08
I
www.bronkhorst.com
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