Dräger REGARD 3000 Mode D'emploi page 119

R
I
T
The configurable value for underange minimum must be set to >= 3.6 mA.
In some cases, a typical power consumption is defined in the instructions for use
instead of a typical current consumption. In such cases, the typical current
consumption is dependent on the voltage through the transmitter connections.
The maximum line resistance during the operation of 3-wire transmitters is shown in
the following table:
Maximum simple line
resistance [Ω]
1) If the precise supply voltage of the REGARD 3000/7000 is not contained in the table, use the
next lowest value.
2) If the precise maximum transmitter power as per the data sheet is not contained in the table,
use the next highest value.
In all cases, it must be ensured that the voltage on the transmitter does not fall
below the permitted minimum value. For this reason, it must be ensured that the
calculated value satisfies the following formula, too:
R < ((U
L
R
L
P
T
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Instructions for use
REGARD 3000
Resistance of a line (supply or return line) to the transmitter, where it is
L
assumed that the resistance of the supply and return line is identical
Typical current consumption of the transmitter in line with the instruc-
tions for use
18.0
0.047 48.1
0.068 45.2
0.100 41.3
0.150 36.5
0.220 31.3
0.330 25.6
0.470 20.7
0.680 16.1
1.000 12.0
1.500 8.6
2.200 6.1
3.300 4.2
4.700 3.0
6.800 2.1
10.000
15.000
– U ) U ) / (2 x P
V tmin Tmin
Resistance of a line (supply or return line) to the transmitter, where it is
assumed that the resistance of the supply and return line is identical
Typical power consumption of the transmitter in line with the instructions for
use
Installation and commissioning
Supply voltage of the REGARD 3000/7000
20.0 22.0 24.0
48.8 49.4 50.0
46.1 46.9 47.6
42.5 43.6 44.4
37.9 39.2 40.2
32.9 34.3 35.5
27.2 28.6 30.0
22.3 23.7 25.0
17.5 18.8 20.0
13.2 14.2 15.3
9.5 10.3 11.2
6.8 7.5 8.1
4.7 5.2 5.7
3.4 3.7 4.1
2.4 2.6 2.9
- 1.6 1.8 2.0
- - -
)
T
1)
[V]
26.0 28.0 30.0
50.4 50.8 51.1
48.2 48.7 49.2
45.2 45.9 46.5
41.2 42.0 42.8
36.6 37.6 38.5
31.1 32.2 33.2
26.2 27.3 28.3
21.1 22.1 23.1
16.3 17.2 18.1
12.0 12.7 13.5
8.7 9.3 9.9
6.1 6.6 7.0
4.4 4.8 5.1
3.1 3.4 3.6
2.1 2.3 2.5
- - - 1.7
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