Grundfos SMART Digital XL DDA 120-7, Инструкция по установке и эксплуатации

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English (GB)
27
Set analog scaling
Analog scaling refers to the assignment of the
current input value to the dosing flow.
Changes of analog scaling affect also the analog
output signal. See section
7.5
Analog output
.
Analog scaling passes through the two reference
points (I
1
/Q
1
) and (I
2
/Q
2
), which are set in the "
Setup
>
Analog scaling
" menu. The dosing flow is
controlled according to this setting.
Example 1 (DDA 60-10)
Analog scaling with positive gradient:
Fig. 22 Analog scaling with pos. gradient
In example 1, the reference points I
1
= 6 mA, Q
1
= 20
l/h and I
2
= 16 mA, Q
2
= 60 l/h have been set.
From 0 to 6 mA analog scaling is described by a line
that passes through Q = 0 l/h, between 6 mA and 16
mA it rises proportionally from 20 l/h to 60 l/h and
from 16 mA onwards it passes through Q = 60 l/h.
Example 2 (DDA 60-10)
Analog scaling with negative gradient (Operation
mode 0-20 mA):
Fig. 23 Analog scaling with neg. gradient
In example 2, the reference points I
1
= 2 mA, Q
1
= 60
l/h and I
2
= 16 mA, Q
2
= 18 l/h have been set.
From 0 to 2 mA analog scaling is described by a line
that passes through Q = 0 l/h, between 2 mA and 16
mA it drops proportionally from 60 l/h to 18 l/h and
from 16 mA onwards it passes through Q
2
= 18 l/h.
Set analog scaling in the "
Operation
" menu
Analog scaling can also be modified after a security
prompt directly in the "
Operation
" menu. This is how
the dosing flow is directly modified for the current
flow input value. Please observe that changes also
have a direct effect on point I
2
/Q
2
(see fig. 24 ).
Fig. 24 Set analog scaling ("
Operation
" menu)
7.4.4
Batch (pulse-based)
In this operation mode, the pump doses the
set batch volume in the set dosing time (t
1
). A
batch is dosed with each incoming pulse.
Fig. 25
Batch (pulse-based)
The setting range depends on the pump type:
* Thanks to the digital motor control, dosing
quantities with a resolution of up to 1/8 of the
dosing stroke volume can be dosed.
TM
06
70
81
32
16
T
M
06
70
82
32
1
6
Q [l/h]
16
20
6
60
40
0
0 2 0 I [mA]
(I
2
/Q
2
)
(I
1
/Q
1
)
0
0
20 16
18
2
60
I [mA]
Q [l/h]
(I
2
/Q
2
)
(I
1
/Q
1
)
T
M
06
70
83
29
1
6
T
M
06
70
85
39
18
Type
Setting range per batch
from [ml] to [l]
Resolution*
[ml]
DDA 60-10 5.56 999 0.694
DDA 120-7 11.6 999 1.45
DDA 200-4 19.3 999 2.41
4 0 20
100
0
Q [%]
I [mA]
new
actual mA
(I
2
/Q
2
)
(I
1
/Q
1
)
(I
2
/Q
2
)
Pulse
Batch volume
Pulse
Time
t
1
t
1