ELIS PLZEŇ a. s.
Design, Assembly and Service Manual
Page 36 of 69
Electromagnetic flowmeter FLONET FN20xx.1
ELIS PLZEŇ a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, Phone: +420/377 517 711, Fax: +420/377 517 722
Es90420K/c
Uniform output pulses
The flowmeters with a “Series 5” electronics (including boards FNA5, FNP5, FNS5 and FNZ5), the user may
select the so-called uniform output pulses. These can only be set at the OUT2 output. The standard OUT2
setting on board FNA5 is facilitated by jumper W1 1-2. To set uniform output pulses, remove jumper W1 1-2
and install jumper W1 2-3. Further configuration steps are carried out by means of keypad and display.
To set the uniform output pulse mode:
1.
Enter the configuration menu, select “Production Data” and check the sensor size – e.g. DN40.
Return to the basic menu.
2.
Select “Output Functions”, press Enter. Select “Output 2 Function”, press the Enter. Select
“Frequency for Q+” (or Frequency for Q-“ or “Frequency for |Q|”), press the Enter. Set the value of
flow rate per 1 kHz with respect to the sensor dimension. In our case, for DN40, Q
4
is 12.5 l/s (see
the table below). Return to the basic menu.
3.
Select “Production Data”, press the Enter. Select “Base Frequency”, press the Enter. Enter the value
shown in the table. In the case of DN40, the base-frequency value is 8,192. Return to the basic
menu and leave the configuration menu by selecting “Exit”.
4.
Install jumper W2 3-4 on analog board FNA5 (see the table). The position of jumper W2 determines
the output voltage-divider parameters.
5.
This is all you need to do to set uniform output pulses.
Note:
If the actual flow-rate unit is other than litres per second (l/s), the value of 12.5 l/s needs be recalculated.
For example, if the actual unit is m
3
/h, multiply 12.5 by 3.6 = 45 m
3
/h; enter this value as the “Flow Rate
Per 1 kHz” parameter.
Uniform output pulse setting table
Calorimeter
pulse
constant
[litres per
pulse]
Flow
sensor
DN
Q
4
[ gpm ]
Q
4
[ m
3
/h ]
Output
frequency
[ Hz ]
Base
frequency
[ Hz ]
Jumper
position
on board
FNA5
100
15
28,62
6.5
0,018
4718,592
W2 5-6
100
20
52,83
12
0,0333
8729,395
W2 5-6
100
25
79,25
18
0,05
3276,8
W2 3-4
100
32
132,09
30
0,0833
5459,1488
W2 3-4
100
40
198,13
45
0,125
8192
W2 3-4
100
50
317,01
72
0,2
1638,4
W2 1-2
100
65
528,34
120
0,3333
2730,394
W2 1-2
100
80
792,52
180
0,5
4096
W2 1-2
100
100
1232,80
280
0,7777
6370,918
W2 1-2
x
x
x
x
x
x
x
1000
125
1893,23
430
0,11944
7827,6198
W2 3-4
1000
150
2861,86
650
0,18055
1479,066
W2 1-2
1000
200
5063,30
1150
0,3194
2616,525
W2 1-2
1000
250
7925,16
1800
0,5
4096
W2 1-2
1000
300
11095,23
2520
0,7
5734,4
W2 1-2
1000
350
15410,04
3500
0,972
7962,624
W2 1-2
