ON/OFF ratio

The ratio of ON time to OFF time of one input pulse. The ON/OFF ratio should be 1:1 at the maximum counting speed.

Operating distance

Displacement meter sensor heads (LC Series) have a stepped reference face. For these meters, the reference distance is the distance from the reference face to the point at which the display or measurement value is 0 V. The distance from the light-emitting surface of the sensor head to the center of the measurement area is called the operating distance.

Operating principle

Conventional static electricity measurement uses the surface potential sensor to measure the electrostatic induction caused by a target. With this method, however, the measured value changes greatly when the distance between the target and the surface potential sensor changes. The SK sensor uses the V.S.S. method, developed originally by KEYENCE. It minimizes measurement errors due to the change in the operating distance, enabling both the wide measuring range (0 to ±30 kV) and accurate measurement.

Output delay time

Time delay between the rising edge of the count input at which the count reaches the preset value and the rising edge of the control output.

Output Holding Time

Time when a voltage higher than the specified level is held after input is shut off.

Output Impedance

An output resistance value of analog voltage (current) output. This describes the protective resistance of an output circuit. The value measured with the instrument is the voltage divided by the output's output impedance and the instrument's input impedance. Consequently, the smaller output impedance enables measurement of a value closer to the true value.

Oversampling

Oversampling is a method that takes samples (A/D conversion) at frequencies higher than the frequency of input signals. It ensures high reproducibility of input signals and improved resolution.