Answers to Electronic Load Questions 
Executive Engineering at Exec-Eng.Com



  • Are their any precautions I should use with the Bias Supply for the Electronic Load?
    Yes there are! If a lead on the power input should slips off and touch a bias ground you might damage the Electronic Load's circuits. It is our suggestion that each electronic load have a fuse added to both the (+) positive bias input (-) and negative bias input, a 32Vdc 1/4A pico fuses will do just fine.

    Note: Another thing that you should do, is if you are using any external circuits controlling the electronic load, always connect the negative or return side to the bias negative input connection. Behind the fuse for protection.
  • Do I need more than one bias supply too run all my electronic loads?
    Well, that depends on the kind of applications that you have. If you are testing using many power sources you may want a separate bias supply for each power source just for isolation. This way if one bias supply fails only the loads to that bias supply shuts down. Our suggestion is to have one bias supply for each power source you are testing.
  • What kind of ESD precautions do I need to take?
    As with any electronic products you should use ESD precautions with the Electronic Loads.

    Our Electronic Loads use antistatic epoxy to cut down on static build-up.
  • Do I need two bias supplies to run the electronic load?
    No you don't, only one bias supply is required. We have supplied you with both a regulated input and a none regulated input. The reason we do this is for customer that need ultra low noise operation of there electronic loads. Most customer can use loads that have 100 to 200 mV of noise in them. By using the 12 volts bias input you can pick your noise floor of the electronic load.
  • What does the noise floor do for me?
    Any device that operates from about 2 volts up you don't have to worry about the noise floor of an electronic load. But for those people that are below 2 volts.
    The noise floor can be a problem.  100 mV out of 2 volts is not much noise but out of 1 volts it is 10% of the signal. If you are producing power supplies at 1.4 volts you need to know if the load is giving you the ripple or the power supply is giving you the ripple. This is why we give customer the option to pick the bias supply that is right for there operation. Buy an off the shelf load with no noise specification is risky business.
  • What kind of bias current dose the load require?
    Most loads only require from 20 mA per load to as much as 100 mA per load. Some  applications require more current than other. If you have question consult the factory.

  • Can I run the electron load form batteries?
    Yes you can. We have had several customer do this and even our demos that we take to the trade shows are runs on batteries. .




Executive Engineering Home

Terminology of Electronic Loads

Current Ctrl of Electronic Loads

Powering the Electronic Loads

Heat Sinks for Loads

Using DtoA's & AtoD's

Selecting an Electronic Load




Fusing Bias Supply

Grounding Bias

Multi Loads & Single Bias

ESD Protection

Bias Required

Signal Noise Floor

Battery Operation

Bias Current