Quick Installation Guide
Doc nr.: 9.17.066C Date: 05-07-2013
SCOPE OF THIS GUIDE
1. Check LIQUI-FLOWTM mini properties
B
Output
A – 0…5 Vdc
B – 0…10 Vdc
F – 0…20 mA
G – 4…20 mA
2. Check test-pressure
C
a
L
o
3. Check if system piping is clean
F
U
R
I
LIQUI-FLOWTM mini instruments are one of the smallest micro fluidic Mass Flow Meters (MFM) of its kind. The instruments are
capable of measuring ultra low flow rates in ranges starting from 1.5…75 mg/h up to 12…600 mg/h, based on water. The
straight, duplex steel sensor tube (W1.4462) has an internal volume of less than 1 mm
principle
. Due to its high pressure rating of max. 1000 bar (15000 psi) the MFM is suited for HPLC systems. The instruments are
equipped with a microprocessor-based printed circuit board, offering high accuracy and excellent temperature stability. The
RJ45 connection is used for power supply and for both analog and digital (RS232) communication.
TM
This manual covers the short-form instructions for LIQUI-FLOW
mini mass flow instruments regarding:
start-up
mounting
zeroing
operation
3
and operates on the thermal measuring
This manual will help you start-up your LIQUI-FLOW
TM
mini in only 10 steps. More detailed information can be found in
documents listed below:
Instruction manual LIQUI-FLOWTM mini series (document nr. 9.17.065)
Consists information for basic and advanced operation, more detailed product information and instructions for
troubleshooting
FlowPlot Manual (document nr. 9.17.030)
Hookup diagram LIQUI-FLOWTM mini (document nr. 9.16.097)
These documents can be downloaded from the website: www.bronkhorst.com
or can be sent by e-mail on request.
Starting-up
efore installing it is important to read the attached label and check:
Flow rate
Fluid to be measured
Pressure
Output signal
Temperature
heck the red-coloured sticker and make sure the test-pressure is in
ccordance with normal safety factors for your application.
IQUI-FLOWTM mini instruments are tested up to the pressure indicated
n the red sticker.
or reliable measurement always make sure the fluid stream is clean.
se filters to assure a particle-free liquid stream.
ecommended pore-size: 2 µm.
f back flow can occur, a downstream filter is recommended too.
2
9.17.066
4a. Mount / install instrument properly
F
or LIQUI-FLOWTM mini the upright position is preferred. When using a
L
“
c
t
s
(OEM) housings.
Install the LIQUI-FLOWTM mini instrument in the line, in accordance with the direction of the FLOW arrow. The
a
supplier of the fittings. Special types of fittings are available on request.
4c. 10-32 UNF fittings
T
t
O
l
c
m
7a. Analog operation:
F
u
7b. Digital RS232 operation
D
t
a
W
IQUI-FLOWTM mini instrument in up- or downward position make sure to
zero” the instrument prior before use (see step 10). Avoid installation in
lose proximity of mechanic vibration and/or heat sources. The housing of
he instrument is according to class IP40, which means that the instrument is
uitable for indoor (dry) applications, like laboratories or well protected
rrow for flow direction is indicated on the body of the instrument. If applicable follow the guidelines of the
4b. Compression type fittings
For leak tight installation of compression type fittings make sure that the tube is inserted up to the shoulder in the
fitting body and that no dirt or dust is present on tube, ferrules or fittings. Tighten the nut finger tight; while
holding the instrument, then tighten the nut one turn.
ighten the 10-32 UNF fittings according to the instructions of the supplier of
he fittings.
nly use 1/16” tubing with a straight and clean cut without burrs to ensure
eak tightness. Deburr the tubing prior to installation. A new ferrule
onnection must be made for each new adapter to ensure leak-tightness and
inimum dead volume, due to tolerances in the adapter dimensions.
Location
Install the instrument on a stable position and assure that mechanical vibration, heat source influence and draft
are reduced to a minimum.
5. Leak check
Check the system for leaks before applying (fluid) pressure. Especially if toxic, explosive or other dangerous fluids
are used!
6. Electrical connection
TM
Electrical connections must be made with a standard cable or according to the LIQUI-FLOW
mini hook-up
diagram. These diagrams can be found on the “Documentation and software tools” CD-ROM and at the download
TM
section of www.bronkhorst.com. LIQUI-FLOW
mini instruments are powered with +15…+24 Vdc.
or analog operation refer to the “Hook-up diagram LIQUI-FLOWTM mini” or
se an RJ-45 loose-end cable (7.03.419) to connect the required signals.
igital operation over RS232 can be established when using
he following setup. Using RS232 or USB-RS232 convertor with
PC will allow you to use (free) Bronkhorst® software for
indows, such as FlowDDE and FlowPlot.
© 2013 Bronkhorst High-Tech B.V. 3
7c. Bus / Digital RS485 operation
8. Micro-switch operation
U
a
f
a
a
t
With digital operation over RS485 a bus-system with multiple instruments can be set up. Refer to the “Instruction
TM
Manual LIQUI-FLOW
mini series” for possible systems.
Multi-functional switch
sing the micro-switch on the instruments, several actions can be monitored
nd started. The green LED is used for status indication. The red LED is used
or errors/warnings/messages. The micro-switch can be used to start several
ctions, such as auto-zero, restore factory settings and bus-initialisation
ctions, if applicable. See specific zero-procedure below and section 3.3 of
he Instruction Manual for more details.
Status LED
Error/Warning LED
Unless specified otherwise, the LIQUI-FLOWTM mini instrument is set for RS232 communication at 38k4 baud on
node address 03 by default.
Warm-up time:
TM
Let the LIQUI-FLOW
mini warm-up for at least 30 minutes for best accuracy.
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 toxic or other dangerous fluids, purging for at least 30 minutes with a dry, inert gas (like
Nitrogen or Argon) is absolutely necessary before use. After use with toxic or other dangerous fluids, complete
purging is also required before exposing the system to air.
10. Zeroing (optional)
The zero point of each instrument is factory adjusted. If required the zero point can be re-adjusted over RS232 or
by means of using the micro-switch. Procedure for zeroing by-micro switch:
Warm-up, pressure up 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 micro-switch and hold it. After a short time the red LED will go ON and OFF, then the green LED will go ON.
At that moment release the micro-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 burning continuously again, the
zeroing action was successful.
Ready
Your LIQUI-FLOW
TM
mini instrument is now ready for operation.
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