Sensor - Fluidwell F Series Manual

Page 16
FILTER
61
F
ILTER VALUE
01
02
03
05
10
20
30
50
75
99
CUT-OFF
62
CALIBR. LOW / 0%
63
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6 - SENSOR

The resistive signal of a sensor mirrors the actual level. This signal is
measured several times a second by the F073-T. The value measured is
a "snap-shot" of the real level as it will be fluctuating. With the help of this
digital filter a stable and accurate reading can be obtained while the filter
level can be set to a desired value.
The filter principal is based on three input values: the filter level (01-99),
the last measured resistive value and the last average value. The higher
the filter level, the longer the response time on a value change will be.
Below, several filter levels with their response times are indicated:
R
ESPONSE TIME ON STEP CHANGE OF RESISTIVE VALUE
50% 75%
INFLUENCE
filter disabled filter disabled
0.3 seconds 0.5 seconds
0.5 seconds 1.0 seconds
1.0 seconds 1.8 seconds
1.8 seconds 3.5 seconds
3.5 seconds 7.0 seconds
5.3 seconds 10 seconds
8.8 seconds 17 seconds
13 seconds 26 seconds
17 seconds 34 seconds
To ignore e.g. vibration due to an empty tank, a low-level cut-off can be
set as percentage over the full range of 100% signal. When the resistive
value is below required with this setting, the signal will be ignored.
The cut-off value can be programmed in the range 0.0 - 99.9%.
With this setting it is possible to calibrate the input value for 0% as the
signal from the sensor might not reflect its reference value at level zero.
This function will measure the provided resistance value at level zero.

Warning: be very sure that the offered signal is correct
before the calibration is executed as this function has major
influences on the accuracy of the system!
After pressing PROG, three settings can be selected:
CALIBRATE: with this setting, the input will be calibrated with the

actual 0% value. After pressing enter, CAL SET will be
displayed as soon as the calibration is completed. From
that moment, the resistive value must be more than the
calibrated value for the signal to be processed.
 with this setting, the manufactures value is re-installed.
DEFAULT:
 to select the last calibrated value.
CAL SET:
HF073TEN_v0403_05 Atex_IECEx_CSA_FM
T
IME IN SECONDS
90%
INFLUENCE INFLUENCE
filter disabled
1.0 seconds
1.5 seconds
2.8 seconds
5.6 seconds
11 seconds
17 seconds
29 seconds
43 seconds
57 seconds
.
99%
INFLUENCE
filter disabled
1.8 seconds
3 seconds
5.3 seconds
11 seconds
23 seconds
34 seconds
57 seconds
86 seconds
114 seconds