HF110AEN_v0501_04
Page 19
6 - ANALOG OUTPUT (CONTINUED)
FILTER
67
This function is used to stabilize the analog output signal.
The output value is updated every 0.1 second. With the help of this digital
filter a more stable but less precise reading can be obtained.
The filter principal is based on three input values: the filter level (01-99),
the last analog output 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:
F
ILTER VALUE
R
ESPONSE TIME ON STEP CHANGE OF ANALOG VALUE
.
T
IME IN SECONDS
50%
INFLUENCE
75%
INFLUENCE
90%
INFLUENCE
99%
INFLUENCE
01
filter disabled
filter disabled
filter disabled
filter disabled
02
0.1 second
0.2 second
0.4 second
0.7 second
03
0.2 second
0.4 second
0.6 second
1.2 seconds
05
0.4 second
0.7 second
1.1 seconds
2.1 seconds
10
0.7 second
1.4 seconds
2.2 seconds
4.4 seconds
20
1.4 seconds
2.8 seconds
4.5 seconds
9.0 seconds
30
2.1 seconds
4 seconds
7 seconds
14 seconds
50
3.5 seconds
7 seconds
11 seconds
23 seconds
75
5.2 seconds
10 seconds
17 seconds
34 seconds
99
6.9 seconds
14 seconds
23 seconds
45 seconds
7 - RELAY OUTPUT
One transistor or mechanic relay output is available as scaled pulse output according to the
accumulated total.
PERIOD TIME
PULSE OUTPUT
71
The period time determines the time that the transistor or relay will be
switched; in other words the pulse length. The minimum time between the
pulses is as long as the selected period time.
One period is approx. 7.8 msec. If the value selected is “zero”, the pulse
output is disabled. The maximum value is 255 periods.
Note:
If the frequency should go out of range - when the flowrate
increases for example - an internal buffer will be used to "store the missed
pulses": As soon as the flowrate reduces again, the buffer will be
"emptied".
It might be that pulses will be missed due to a buffer-overflow, so it is
advised to program this setting within it's range.
If a mechanic relay is used for the pulse output, it is recommended to
reduce the max. output frequency to 0.5Hz, else the life time will be
reduced significantly.
N
UMBER OF PERIODS
P
ERIOD TIME
MAX
.
FREQUENCY
0 disabled
disabled
1 0,0078
seconds
64
Hz.
2 0,0156
seconds
32
Hz.
3 0,0234
seconds
21
Hz.
64 0,5000
seconds
1
Hz.
255 1,9922
seconds
0.25
Hz.
PULSE PER
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According to the measurement unit settings for total, a pulse will be
generated every X-quantity. Enter this quantity here while taking the
displayed decimal position and measuring unit into account.