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1.What is the purpose of range selector knob in reading or testing a circuit?
2.What is the purpose of zero-ohm adjustment knob in reading or testing a resistance?​


Sagot :

Answer:

1.It indicates the measured values on the multimeter. RANGE SELECTOR KNOB/selector switch- makes it possible to select different function and range of the meter. ADJUSTMENT SCREW– makes it possible to adjust the pointer to the zero position of the scale.

2.ZERO-OHM ADJUSTMENT KNOB- is used to zero-in the pointer before measuring resistance. ... Be sure that the tester is set to the correct range setting: resistance range when measuring the ohm, voltage range when measuring voltage and ammeter range when measuring the value of electric current.