Ea Elektro Automatik EA Elektro-Automatik EA-ELR 9250-140 3U Electronic Load 0 - 140 A 0 - 250 Vdc 0 - 7000 W 33200406 データシート

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EA Elektro-Automatik GmbH

Helmholtzstr. 31-33 • 41747 Viersen

Germany

Fon: +49 2162 / 3785-0

Fax: +49 2162 / 16230

The arbitrary (freely definable) function offers the user further scope. Up to 100 sequences are available for use 

for current I and voltage U, all of which have the same parameters but which can be differently configured so that 

a complex function process can be built up. The 100 sequences can run one after another in a sequence block, 

and this sequence block can then be repeated many times or endlessly. From the 100 sequences a block can be 

freely defined to run from sequence x to sequence y. A sequence or sequence block acts only on current or volt-

age, thus a mix of assignment to current I or voltage U is not possible.
The arbitrary curve overlays a linear progression (DC) with a sine curve (AC), whose amplitude and frequency 

are shaped between start and end values. If the start frequency (Fs) = end frequency (Fe) = 0 Hz the AC values 

have no impact and only the DC part is effective. Each sequence is allocated a sequence time in which the AC/

DC curve from start to finish will be generated.
The following parameters can be configured for each sequence in the arbitrary function (the table lists parameters 

for current, for voltage it would be Us, Ue etc.)

Is(AC)

0...50% Nominal value I

1-100 Start amplitude of the sine wave part of the curve (AC)

Ie(AC)

0...50% Nominal value I

1-100 End amplitude of the sine wave part of the curve (AC)

fs(1/T)

0 Hz...10000 Hz

1-100 Start frequency of the sine wave part of the curve (AC)

fe(1/T)

0 Hz...10000 Hz

1-100 End frequency of the sine wave part of the curve (AC)

Angle

0 °...359 °

1-100 Start angle of the sine wave part of the curve (AC)

Is(DC)

Is(AC)...(Nominal value - Is(AC)) of I 1-100 Start value of the DC part of the curve

Ie(DC)

Ie(AC)...(Nominal value - Ie(AC)) of I 1-100 End value of the DC part of the curve

Seq.time 0.1 ms...36000 s

1-100 Time for the selected sequence

for Δf/s is 9.3. Thus, for example, a setting of fs = 1 Hz, fe = 11 Hz and Seq.time = 5 s would 

not be accepted as Δf/s is only 2. A seq. time of 1 s would be accepted, or, if the time remains 

After the settings for the selected sequence are accepted with SAVE, further sequences can be configured. If 

the button NEXT is touched a second settings screen appears in which global settings for all 100 sequences are 

displayed.
The following parameters can be set for the total run of an arbitrary function:

Startseq.

1...Endseq.

First sequence in the sequence block

Endseq.

100...Startseq.

Last sequence in the sequence block

Seq. Cycles ∞ oder 1...999

Number of cycles of the sequence block.

Schematic diagram:

Applications and results:

Example 1
Focussing 1 cycle of 1 sequence from 100
DC values for start and end are the same, also the AC amplitude. 

With a frequency >0 a sine wave progression of the set value is 

generated with a defined amplitude, frequency and Y-shift (offset, 

DC value at start and end) 
The number of sine waves per cycle depend on the sequence time 

and the frequency. If the sequence time were 1 s and the frequency 

1 Hz, there would be exactly 1 sine wave. If the time were 0.5 s at 

the same frequency, there would only be a half sine wave.