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The degree to which the output of an instrument approaches an accepted standard or true value.
Increases the process signal to a usable magnitude
Senses the parameter being monitored and converts the magnitude of the parameter to a mechanical, electrical, or pneumatic signal.
A range in which the zero value of the measured variable is greater than the lower range value.
The term used to describe the quantity, the property, or the condition that is measured.
The region between the limits within which a quantity is measured
A number or quantity that defines the limits that errors will not exceed when the device is used under referenced conditions.
The algebraic difference between the upper and lower range values.
A range in which the zero value of the measured variable is less than the lower range value.
Suppressed zero range
Converts the output signal of the detector to a signal that can be used easily. (If the detector signal can be used directly, this “conversion” step is not needed.)
Transmits data from one instrument component to another when the components are physically separated.
DESCRIBE the two basic types of measurement
Physical conditions, chemical properties and the quantity of a substance can be monitored by either direct or indirect measurements
DRAW and LABEL a block diagram of a basic instrument channel
DEFINE the following terms:
c. Elevated Zero
d. Suppressed Zero
Range is the extremes of the quantity being measured.
Span is the difference between the upper and lower ranges.
Suppressed Zero is when the range of an instrument is above zero.
Elevated Zero is when the range of an instrument is below zero.
Accuracy is how close the output is to the true value or accepted standard.
Range -100 to -20
Lower Range Value -100
Upper Range Value -20
Basic Instrument Channel
CH 1 Concepts