Null output of op-amps to zero volts

[Simmon]

When calibrating op amps outputs, you have to use a resistor decade box to null out the output of the op amp to zero volts

Each op amp is output .100 to .900 millivolts

This is when there is no input signal

When nulling the output of op amps or a circuit stage so it's zero volts potential , is this biasing?

Or what is it called or doing to the circuit when you null it out like this?

 

[(*steve*)]

I would tend to call it "nulling", but I guess it depends on how you're doing it too.

A lot of these things have overlap. If you're in a car making it move, we call it driving. But if you're going backwards we call it reversing. In this case reversing s still driving, but it's a more specific term covering driving in a certain direction.

Likewise, some of the term you are asking about are frequently just more specific terms than others. In many cases you could use the more general one, but it's often better to use the more specific term (assuming you use it correctly)