AimTTI LD400 Electronic DC Load 80A, 80V, 400W

AimTTI LD400 is an electronic DC load with 80A current, 80V voltage and 400W of power.

Features:
- Versatile solution for testing dc power sources with full bus remote control (LD400P)
- Constant current, resistance, conductance, voltage and power modes
- Wide voltage and current range, 0 to 80 V and 0 to 80 A
- 400 watts continuous dissipation at 28 degrees C
- 360 watts continuous dissipation at 40 degrees C
- 600 watts short-term dissipation capability
- Low minimum operating voltage of below 1V at 40A
- High resolution and accuracy for level setting
- Built-in transient generator with variable slew
- Current monitor output for waveform viewing
- Variable drop-out voltage for battery testing
- High resolution backlit graphic LCD with soft key control
- Front and rear input terminals (front terminals 30A max.)
- Analog remote control of levels and TTL control of on/off and transient switching
- Full bus control via USB, RS232, GPIB and LXI compliant LAN interfaces (LD400P only)

Compact electronic DC load
The LD400 is an inexpensive electronic load which is suitable for testing and characterising a wide variety of dc power sources.
It can be used to investigate the behaviour of many different types of power source such as batteries and solar cells, as well as electronic power supply units.
Its wide voltage/current range, multiple operating modes and built- in transient generator give it the versatility to offer test solutions from the design laboratory through to the component test area.
The LD400P adds full bus remote control via USB, RS-232, GPIB and LAN (Ethernet) interfaces.

Low minimum operating voltage
The LD400 can operate at voltages below 500mV for currents up to 10 amps. At higher currents the fixed minimum resistance (typically better than 25mW) gradually raises the minimum operating voltage, but it remains below 1 volt up to 40 amps and below 2 volts up to 80 amps.
This low operating voltage allows it to be used for many low voltage applications for which other electronic loads are unsuitable.

600 watts intermittent power
The LD400 can operate at power levels up to 600 watts for periods of up to 1 minute.
Short term loading can be sufficient for many testing applications and significantly extends the usefulness of the LD400.

Remote control
The LD400 incorporates analogue remote control for all modes of operation. When “external voltage” is selected the level becomes linearly proportional to the voltage applied to the remote control inputs on the rear panel.
Any waveform can be used as the control voltage allowing complex load conditions to be simulated using, for example, an arbitrary waveform generator.
Alternatively, a logic signal can be used to switch between levels. When “external TTL” is selected, the level is switched between the two defined levels in response to an external logic signal.
The remote control inputs have a wide common mode range allowing the control voltage to be referenced independently of the load terminal voltages.

Current waveform monitor
It is often important to be able to observe the load current waveform on an oscilloscope. The LD400 provides a calibrated monitor output for this purpose as well as a sync output from the transient generator.
The monitor output has several volts of compliance with respect to the load input, thus allowing it to be connected to a grounded oscilloscope without current diversion.

CONSTANT CURRENT MODE
Used for load testing of normal voltage source power supplies and for constant current discharge testing of batteries.
This mode provides rapid measurement of power source regulation (V/I characteristics).




CONSTANT RESISTANCE MODE
Simulates a standard resistive load by providing a current drain proportional to voltage. Settings are displayed in Ohms or milli-Ohms.
Unlike  fixed resistors or rheostats, the load provides a precisely controllable resistance with high power dissipa on and high temperature stability over a wide value range.




CONSTANT POWER MODE
Simulates a load whose power con- sump on is independent of the ap- plied voltage.
This is true of many types of equipment that incorporate switch-mode regulators.
This mode may be particularly suitable for testing power sources of portable devices such as Lithium-ion batteries.




CONSTANT VOLTAGE MODE (LD400 MODELS ONLY)
Used for load testing of constant current power supplies. The unit operates as a high power shunt regulator.




CONSTANT CONDUCTANCE MODE
As well as showing settings in amps per volt, this mode provides be er resolution when setting very low equivalent resistance values.