What is burnout feature ? Explain.
Burnout provides the warning feature of driving indicator the end of scale if the input circuit
should open.
A burnout resistor is provided which develops a voltage drop between the measuring circuit and
the amplifier. The polarity of the signal determines the direction of the servo drive upon an open
circuit in the input.
Upscale burnout : R value 10 M
Downscale burnout : R value 2.2 M