INSTRUMENT DIFINITION

ACCURACY :

A number or quantity which defines the limit of error under reference conditions.

ATTENUATION :

A decrease in signal magnitude between two points, or between two frequencies.

 DEAD TIME :

The interval of time between initiation of an impact change or stimulus and the start of the resulting response.

DRIFT :

As undesired change in output over a period of time, which change is unrelated to input, operating conditions, or load.

ERROR :

The difference between the indication and the true value of the measured signal.

SPAN ERROR :

It is the difference between the actual span and the specified span and is expressed as the percent of specified span.

ZERO ERROR :

It is the error of device operating under the specified conditions of use when the input is at the lower range value.

STATIC GAIN :

It is the ratio of the output change to an input been change after the steady state has been reached.

HYSTERESIS :

The maximum difference between the upscale and downscale indications of the measured signal during a full range traverse for the same input.

INTERFERENCE :

Interference is any spurious voltage or current arising from external sources and appearing in the circuits of a device.

COMMON MODE INTERFERENCE :

It is the form of interference which appears between the measuring circuit terminals and ground.

NORMAL MODE INTERFERENCE :

It is the form of interference which appears between measuring circuit terminals.

LINEARITY :

The closeness to which a curve approximate a straight line.

RANGE :

The region between the limits within which a quantity is measured received or transmitted, expressed by stating the lower and upper range values.

REPEATABILITY :

The closeness of agreement among a number of consecutive measurements of the output for the same value of the measured signal under the same operating conditions.

REPRODUCIBILITY :

The closeness of agreement among repeated measurements of the output for the same value of the input made under the same operating conditions.

RESPONSE :

It is the general behavior of the output of a device as a function of input both with respect to time.

SIGNAL TO NOISE RATIO :

Ratio of signal amplitude to noise.

TIME CONSTANT :

The time required for the output to complete 63.2 % of the total rise or decay.

SPAN :

The algebraic difference between upper and lower range values.

ZERO SHIFT :

Any parallel shift of the input output curve.