TEKNA DPG601 - Page 19

901
16
6
0,25
1000
250
25
2,50
0,25
14
7
0,29
1160
290
29
2,90
0,29
12
8
0,33
1320
330
33
3,30
0,33
902
10
10
0,42
1680
420
42
4,20
0,42
6
12
0,5
2000
500
50
5,00
0,50
2
15
0,63
2520
630
63
6,30
0,63
903
5
25
1,04
4160
1040
104
10,40
1,04
4
40
1,67
6680
1670
167
16,70
1,67
3
50
2,08
8320
2080
208
20,80
2,08
904
2
60
2,5
10000
2500
250
25,00
2,50
1
80
3,33
13320
3330
333
33,30
3,33
0
100
4,17
16680
4170
417
41,70
4,17
Adj
usting of the working frequency
By adjusting the maximum working frequency (400 strokes/min) we can set up the speed with which the “n” strokes are given
after the arrive of the signal from the water meter pulse sender.
Example: Setting up n=40, to every impulse from outside the pump will dose 40 strokes.
At the maximum working frequency (400 strokes/min) the pump will employ 6 second to dose 40 strokes; if
between two successive signals they passed, as an example, 50 second ones, we could have excess dosaga; if we
wished to have a dosage for at least 30 seconds, we have to set the pump with a working frequency of 80
strokes/min.
Warning:
please test if the pump is fast enough, so as to finish dosing before the arrival of the next signal from the water
meter; if not the memory function alarm will be activated.
Example mode n : 1
I
have to dose 1.000 ppm in one lead with a pressure of 2 bar, having:
- water meter mod. CB4 (4 imp/l)
- dosing pump mod. Tekna DPG 904 (60 l/h a 2 bar)
In the table on the previous page we see that the model 904 and the water meter CB4, with n=1 doses 10.000 ppm
The value of concentration of the dosage in table with n=1 is
too high regarding what it is necessary.
In such case I will have to program the DPG pump in mode n : 1.
Setting up n=10, I obtain the 1.000 ppm wished.
Adjusting of the working frequency
Adjusting the maximum working frequency (400 strokes/min) we can set up the speed at which the “n” strokes are given after
the arrival of the signal from the water meter.
Wa
rning:
please test if the pump is fast enought , so as to finish dosing before the arrival of the next signal from the water
meter; if not the memory function alarm will be activated.
Example:
A water meter pulse sender mod. 1 stroke/L with a flow rate of 15 mc/h, will give 250 strokes/min; setting the pump
with "n"=5, the pump will dose 50 strokes/min (50 = 250/5).