Fluidwell F103 WP User Manual

Page 24
FW-F103-P-XN-M_v2002_03_EN.docx
7.2
RATE-MIN (4mA)
Enter the flowrate at which the output should generate the minimum
signal (4mA) – in most applications at flowrate “0”.
The number of decimals displayed depend upon SETUP 2.3.
The measuring unit and time (L/min for example) depend on settings
SETUP 2.1 and SETUP 2.2 and are displayed during editing.
If desired, you can program the analog output 'up-side-down'. The
4mA represents the maximum flow rate.
For example: enter 800 L/min.
7.3
RATE-MAX (20mA)
Enter the flowrate-at which the output should generate the maximum
signal (20mA) – in most applications at maximum flow.
The number of decimals displayed depend upon SETUP 2.3.
The measuring unit and time (L/min for example) depend on settings
SETUP 2.1 and SETUP 2.2 and are displayed during editing.
If desired, you can program the analog output 'up-side-down'. The
20mA represents the minimum flow rate.
For example: enter 0 L/min.
7.4
CUT-OFF
A low flow cut-off can be set as a percentage of the full range of
16mA, for example, to ignore leakage.
As long as the flowrate is less than the required rate, the output
current will be to minimum signal (4mA normally, 20mA in case the
analog output is programmed ‘up-side-down’).
See following examples for setting the cut-off value:
CUT-OFF
%
RATE-MIN
4mA
RATE-MAX
20mA
REQUIRED RATE
OUTPUT
2%
0 L/min
100 L/min
(100-0)*2% = 2.0 L/min
4+(16*2%) = 4.32mA
3.5%
20 L/min
800 L/min
(800-20)*3.5%= 27.3 L/min
4+(16*3.5%)=4.56mA
7.5
TUNE MIN (4mA)
Use this setting to precisely tune the minimum analog output value
(initial value is 4 mA). This value can differ slightly due to ambient
influences such as temperature.
Before tuning the signal, be sure that the analog signal is not
being used for any application!
After pressing PROG, the current will be about 4mA. The current can
be increased / decreased with the arrow-keys and is directly active.
Press PROG to store the new value.
7.6
TUNE MAX (20mA)
Use this setting to precisely tune the maximum analog output value
(initial value is 20 mA). This value can differ slightly due to ambient
influences such as temperature.
Before tuning the signal, be sure that the analog signal is not
being used for any application!
After pressing PROG, the current will be about 20mA. The current can
be increased / decreased with the arrow-keys and is directly active.
Press PROG to store the new value.
7.7
FILTER
The analog output signal is updated 8 times per second and an
instable flowrate can cause a varying output current.
With the help of this filter function a more stable but less precise
output current can be obtained. The filter principal is based on three
input values: filter level (01-99), previous filter value and actual
flowrate.
Higher filter levels cause the output current to be more stable but take
longer to reach its final value. Lower filter levels cause the output to
be less stable but more responsive. This is indicated in table below.
FILTER VALUE
RESONSE TIME ON CHANGE OF ANALOG OUTPUT (% OF FINAL VALUE)
50%
75%
90%
99%
01
Filter function disabled. Analog output is updated immediately.
02
0.1 sec
0.2 sec
0.4 sec
0.7 sec
03
0.2 sec
0.4 sec
0.6 sec
1.2 sec
05
0.4 sec
0.7 sec
1.1 sec
2.1 sec
10
0.7 sec
1.4 sec
2.2 sec
4.4 sec

Fluidwell F103 WP Specifications

General

Brand	Fluidwell
Model	F103 WP
Category	Measuring Instruments
Language	English