Fluidwell F115-P User Manual

FW_F115-P_M_v2201-01_EN.docx
Page 17
8.5
CUT-OFF
A low flow cut-off, e.g. to ignore leakage, can be set as a percentage of the
full range of 16 mA, 20 mA or 10 V.
When the flow is less than the required rate, the current will be the
minimum signal (4 mA, 0 mA, 0 V). Example:
RATE-MIN
4 mA
RATE-MAX
20 mA
CUT-OFF
%
REQUIRED RATE
OUTPUT
0 L/min
100 L/min
2%
(100-0)*2% = 2.0 L/min
4+(16*2%) = 4.32 mA
20 L/min
800 L/min
3.5%
(800-20)*3.5%= 27.3 L/min
4+(16*3.5%)=4.56 mA
8.6
TUNE-MIN
The (0)4 mA or 0 V value can be tuned precisely with this setting. The
initial minimum analog output value is (0) 4mA or 0 V. However, this value
might differ slightly due to ambient influences such as temperature for
example.
Before tuning the signal, make sure that the analog signal is idle (not
used) for any application!
After pressing PROG, the current will be about 4 mA (0 mA or 0 V). The
current can be increased / decreased with the arrow keys and is directly
active. Press ENTER to store the new value.
If required, you can program the analog output 'up-side-down'. The (0)4
mA or 0 V represents the maximum flow rate and the 20 mA or 10 V
represents the minimum flow rate.
8.7
TUNE-MAX
The 20 mA or 10 V value can be tuned precisely with this setting. The initial
maximum analog output value is 20 mA or 10 V However, this value might
differ slightly due to ambient influences such as temperature for example.
Before tuning the signal, make sure that the analog signal is idle (not
used) for any application!
After pressing PROG, the current will be about 20 mA or 10 V. The current
can be increased / decreased with the arrow keys and is directly active.
Press ENTER to store the new value.
If required, you can program the analog output 'up-side-down'. The (0)4
mA or 0 V represents the maximum flow rate and the 20 mA or 10 V
represents the minimum flow rate.
8.8
FILTER
This setting is used to stabilize the output signal. With the help of this
digital filter a more stable but less actual representation of the flow rate can
be obtained.
The filter principal is based on three input values: the filter level (01-99),
the last calculated flow rate and the last average value. The higher the filter
level, the longer the response time on a value change will be.
FILTER VALUE
RESPONSE TIME ON STEP CHANGE OF ANALOG VALUE (% OF END VALUE)
50%
75%
90%
99%
01
filter disabled
filter disabled
filter disabled
filter disabled
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
20
1.4 sec
2.8 sec
4.5 sec
9.0 sec
30
2.1 sec
4 sec
7 sec
14 sec
50
3.5 sec
7 sec
11 sec
23 sec
75
5.2 sec
10 sec
17 sec
34 sec
99
6.9 sec
14 sec
23 sec
45 sec

Fluidwell F115-P Specifications

General

Brand	Fluidwell
Model	F115-P
Category	Measuring Instruments
Language	English