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About the device
1. Introduction
The electronic loads of the series EL9000 are very efficient
devices which offer a big variety of interesting features in a
19" case at only 6U. Besides the common functionality of
electronic loads you can test batteries, load voltage or current
sources with a pulsed operation, where the pulse widths and
the amplitude are adjustable. Or you can remotely control
the device via an interface card (currently CAN, RS22,
USB or IEEE/GPIB*) and control and monitor nearly all its
features from a PC.
The integration into existing systems is made easy by using
one of the interface cards, the configuration is intuitive and
is done at the device. The electronic loads can thus be
operated in conjunction with a power supply of the series
PS9000/PSI9000 or, with the additional analogue interface
socket at the rear side, controlled and monitored by any other
device with an analogue interface.
The device is microprocessor controlled. This results in
an accurate and fast measurement and display of actual
values, as well as an extended operability by many new
features which wouldn't be realisable with standard analogue
technology.
The modern design offers highest performance and enables
space-saving conceptioning of complex and efficient applica-
tions, like for example industrial test equipment with variable
powers for different demands or for demonstration and test
purposes in the research and development area.
The digital control and the retrofittable interface card strongly
simplify the connection to professional, industrial bus sy-
stems like CAN. Nearly all possibilities of the single systems
are used. With USB you can plug and use up to four (or more)
devices to a standard PC without the need of additional hard-
ware. At CAN you can implement the devices into existing
CAN bus systems without the need to reconfigure the whole
bus system. Address range and transmissions speed can be
selected for the particular EL9000 unit, so it fits best.
The main functions at a glance:
»
Set U, I, P and R, each 0...100%
»
Battery test with Ah and time count
»
Pluggable interface cards (CAN, USB, RS22, IEEE/
GPIB)
»
Analogue interface for external control
»
Pulsed operation between two set values with adjustable
pulse widths and adjustable rise/fall time
»
Adjustable duty cycle (as time) of 50µs...100s and ad-
justable rise time of 0µs...200ms
* supported since firmware version 2.13
© 2008, Elektro-Automatik GmbH & Co. KG
2. Technical specifications
2.1 Control panel
Type
Display:
two line character LCD with
80 characters
Operating elements: 2 rotary encoders, 2 rotary switches,
1 pushbutton
Display formats
The nominal values determine the adjustable range.
Actual and set values are displayed all at once, as long as
the currently active operation mode allows it.
Display of voltage values
Resolution:
4 digits
Accuracy:
max. ±0,1% of U
Formats:
0.0V...80.0V
0.0V...160.0V
0.0V...400.0V
Display of current values
Resolution:
4 digits
Accuracy:
max. ±0,2% of I
Formats:
0.0A...150.0A
0.0A...00.0A
0.0A...600.0A
Display of power values
Resolution:
4 digits
Accuracy:
max. ±2% of P
Formats:
0W...7200W
Display of resistance values
Resolution:
4 digits
Accuracy:
max. ±2% of Ri
of the range of current
Formats:
0.000Ω...1.200Ω
0.000Ω...2.50Ω
0.00Ω...25.00Ω
0.0Ω...50.0Ω
0.0Ω...100.0Ω
Display of time
The elapsed time (only battery test mode) is display in the
format Hours:Minutes:Seconds (HH:MM:SS).
Resolution:
1s
Range:
1s...99h:59m:59s (99:59:59)
New since firmware version 3.01: this time stamp can be
read out via one of the pluggable interface cards, together
with the pulse widths and rise time of the dynamic Level A/B
operation. The dynamic values can also be set remotely. In
order to do so, the time format has been extended so it can
represent 1µs up to some years.
Detailed information about this can be found in the user
instruction manual of the interface cards.
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