Millivolt table use steps - Database & Sql Blog Articles

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(1) The millivoltmeter should be placed vertically, not horizontally. Before the power is turned on, the mechanical zero point screw of the meter should be adjusted so that the hands indicate the zero position (Note, the mechanical zero point does not need to be adjusted frequently).

(2) Select the voltage range according to the size of the side signal value. If you do not know the size of the signal to be measured, you can select the maximum range first and gradually reduce it to the appropriate range.

(3) Turn on the power. After the hands are stable, short the input line and adjust the zero adjustment knob. The measurement can be made by pointing the hands at the zero position.

(4) When measuring, first connect the ground wire (shield wire) of the input line to the common point of the circuit under test, and then connect the non-ground end of the input line to the side point. After the measurement is completed, remove the non-ground end first. Then disconnect the ground wire.

(5) When using this meter as a level meter, the actual level value is the algebraic sum of the number of dBs indicated by the hands and the number of decibels referred to by the range switch.