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WIKA Operating Instructions - Ultrasonic Flowmeter FLC-UFL
81500908.01 08/2020 EN
EN
5.3.6 Slot 2, 4..20 mA option board (01-0203)
Signal
Function
Operating
parameters
LPWR2+
Loop power supply
LPWR2-
Loop power supply
5.3.7 Galvanic isolation
In case galvanic isolation is required, the use of an external
isolator on frequency output D0 is required.
5. Installation / 6. Start-up and commissioning
6. Start-up and commissioning
6.1 Powering up
After the SPU has been wired and powered up it is advisable
to read out a complete list of parameters. In case of a flow
calibrated meter, it is recommended to verify the parameters
as found with the calibration parameters.
The parameters can be read with the dedicated software tool
(consult Euromisure to obtain tool).
A serial connection can be made via the USB interface.
WARNING!
When connecting a PC or laptop in the
hazardous area, ensure the rules and
regulations to work with non EX equipment
are met.
A flow calibrated meter should have the parameter lock
switch closed and tamper proof sealing sticker in place.
Make sure this is in place. Refer to chapter 9 for more details
about sealing.
6.2 Connecting to the USB Service port
To connect to the FLC-UFL series via the USB Service port
it may be necessary to put the FLC-UFL series flowmeter
in USB Service mode. When the communication mode is
set to the RS485 port, the USB Service mode enables to
temporarily interface via the USB port. Refer to chapter 7.4
for details how to enable the USB service mode.
ATTENTION!
When USB Service mode is enabled it will
temporarily disable the RS485 option board.
When there is no activity for 60 seconds on the
USB port the FLC-UFL series resumes normal
operation again.
The default USB communication port settings are:
Baudrate
115400
Parity
None
Databits
8
Stopbits
1
Modbus address
1
6.3 Connecting to a flowcomputer or external device on
the RS485 port
When fitted with an option board for RS485 communications
the FLC-UFL series flowmeter can be connected to a
flowcomputer or external device using the MODBUS RTU
protocol. The default communication protocol and serial port
settings are provided in below:
The Modbus address map can be provided on request.
The FLC-UFL series flowmeter has a built in 120 ohm
termination resistor in case the RS485 network needs to be
terminated at this position. The switch shown in the following
figure can be used for this.
6.4 Commissioning
When possible verify operation of the flowmeter at (near)
zero flow at known gas composition. Zero flow readings and
diagnostics per path should be recorded and assessed. After
this zero flow check, start the gas flow and monitor per path
readings and diagnostics for proper operation of the device.
Ensure that the frequency signal provided by the meter
match the volume flow reading on the local LCD.
It is recommended to log meter readings and diagnostics
using the dedicated software tool during startup conditions.
Baudrate
38400
Parity
None
Databits
8
Stopbits
1
Modbus address
1
