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to determine the parameters and Quantitative expression instrumentation functions and capabilities.
Reference performance characteristics of reference performance characteristic
performance characteristics at the reference operating conditions achieved.
Range is specified
by the upper and the lower limit defined by a section.
Note: The "scope" is often added to the modifier. For example: the measurement range, scale range. It is applicable to be measured or working conditions.
Measuring range measuring range
to be measured quasi predetermined range (fine) Accuracy of the measurement.
Limit of measuring range lower limit range, measured
by a predetermined level (precision) for determining the minimum value of the measurand.
Measurement upper limit of measuring range higher limit range
by a predetermined level (precision) determining the maximum value of the measurand.
Span range
limit and the lower limit value of the algebraic difference range. For example: When the range of -20 ℃ to 100 ℃, the range is 120 ℃.
Scale scale
constituting a part of the device indicating an ordered set of scale marks as well as all relevant figures.
Scale Range scale range
range end point value and the limit value from the beginning of the scale.
Scale marks scale mark
indicating corresponding to one or more determined by measurement of the reticle marks or other means.
NOTE: For digital indication, the number itself is equivalent to the scale marks.
Zero [Scale] -labeled zero scale mark
Synonyms: scale of zero line.
Or marked with a mark of the reticle "zero" on the dial number (plate).
Scale divisions scale division
scale part between any two adjacent scale marks.
Scale division value of scale division value
, also known as cell values.
Scale corresponding adjacent two scale marks is measured difference values.
Scale divisions pitch scale spacing, length of a scale division
the distance between any two adjacent segments on the same along the length of the scale represents the measured centerline scale marks.
Scale length scale length
on a given scale, the length between the beginning and end of the scale marks all segments through the midpoint of the shortest mark.
NOTE: This line may be real or imaginary curved or straight.
Scale start point value minimum scale value
scale is the start point flag corresponding to the measured values.
Scale end value of maximum scale value
scale is the end tag corresponds to the measured value.
Scale digital scale numbering
standard whole group of numbers on a scale, which corresponds to the measured values of the scale marks on the determined numerically or only said scale marks.
Linear scale linear scale
scale grid spacing in the sub-divisions corresponding to the scale value as a proportional constant.
NOTE: scale division pitch is constant is called a linear scale rule scale.
Nonlinear scale nonlinear scale
scale in each scale divisions corresponding to the pitch value was ruled scale is a logarithmic scale relationship.
NOTE: Some non linear scale have specialized names such as logarithmic scale, square-law scale.
Scale zero suppression suppressed-zero scale
does not comprise a zero scale value of the measured value corresponding to the scale within the scale range. For example: the medical thermometer scale.
Expanding scale expanded scale
within the scale range, accounting for the disproportionate extension majority scale length scale.
Zero zero measuring instruments of a measuring instrument
when the auxiliary energy required for any measuring instrument is turned on and work directly measured value indication zero instrumentation.
① In the case where the auxiliary power measurement instruments, the term is often referred to as "zero power."
② When any auxiliary energy instruments are cut without work, often using "mechanical zero" this term.
Instrument Constant instrument constant
a coefficient determined indication measuring instruments, must be shown to be directly multiplied value.
NOTE: When a direct indication equal to the measured value, the constant measuring instrument is 1.
Characteristic curve characteristic curve
shown (the other input volume to maintain a predetermined constant value) curve function relation between the instrument output to one input of a steady state value.
Predetermined characteristic specified characteristic curve
under a predetermined condition, the curve showing the functional relationship between the output of the instrument should have a steady-state value of the input quantity.
Adjustment adjusted
such that instrument is in normal operation and eliminate the deviation to be suitable for use operation performed.
The user adjusts user adjustment
allows adjustment performed by the user.
Calibration calibration
operation and the relationship between the value corresponding to the known value measured under specified conditions, to establish the measuring system or measuring instrument or a material measure Indication embodied.
The calibration curve calibration curve
under the predetermined condition, the measurement value represents the actual instrument curvilinear relationship between the measured value.
Calibration cycle a calibration cycle
composition uplink and downlink calibration curves a calibration curve between the range limits of the calibration instrument.
Calibration tables calibration table
represents data in tabular form the calibration curve.
Traceability traceability
measurements may be linked with the appropriate standards (usually national or international standard etalon) by continuous comparison of a property chain.
Sensitivity sensitivity
output variation value divided by the corresponding instrument of change in input value.
Level (precision) Accuracy accuracy
indication instruments to be measured [conventions] true value of the degree of coincidence.
Level (precision) level of accuracy class Accuracy
Instruments Press level (precision) level divided Accuracy rating.
Limits of error tolerance limits
Synonyms: maximum permissible error maximum permissible error
limits by the standard instrumentation errors, technical specifications prescribed.
The basic error intrinsic error
, also known as the intrinsic error.
Instrument indication error at reference conditions.
Consistency conformity
standard curve with a predetermined characteristic curve (e.g.: linear, logarithmic curve, parabolic, etc.) of the degree of coincidence.
NOTE: divided into independent consistency consistency, consistency and end groups group cases consistency. When only say consistency, it refers to the independent consistency.
Independent consistency independent conformity
by adjusting the calibration curve approaches a predetermined characteristic curve, so that the maximum deviation of the minimum degree of coincidence.
End groups consistency terminal-based conformity
degree of coincidence when the upper and lower limits respectively superposed on a high speed by the calibration curve approaches a predetermined characteristic curve, so that the two curves range.
Zero-zero-based conformity consistency group
at the adjusted calibration curve approaches a predetermined characteristic curve, so that the two curves coincide range limit and the maximum degree of coincidence is equal when the positive and negative deviations.
Consistency Error conformity error
maximum deviation between the curve and the predetermined calibration curve.
① divided into independent consistency consistency error error error and zero end-yl group consistency consistency errors, when only the consistency of said error, it means error identity independent.
② consistency error is usually expressed as a percentage scale.
Linearity linearity
degree of coincidence with a predetermined calibration curve is a straight line.
Note: Linearity Linearity is divided into separate, side based linearity and zero based linearity. When only say linearity, it refers to the independent linearity.
Independent linearity independent linearity
by a high speed close to the specified linear calibration curve, so that the maximum deviation of the minimum degree of coincidence.
Terminal based linearity terminal-based linearity
by adjusting a predetermined calibration curve approaches a straight line, so that when the degree of matching upper and lower limits on the range difference between the two coincide.
Of the zero baseline of zero-based linearity
by adjusting a predetermined calibration curve approaches a straight line, both the lower range limit and the maximum overlap positive and negative deviation when the degree of coincidence is equal to the deviation.
Linearity error linearity error
maximum deviation between a straight line with a predetermined calibration curve.
① linearity error is divided into independent linearity error of terminal based linearity errors and errors of the zero baseline. When simply referred to linearity error, it refers to the independent linearity error.
② linearity error is usually expressed in percent of span.
Dead-dead band
without causing any output instrumentation maximum input noticeable change interval changes.
Discernment discrimination
instrumentation ability to respond to small changes in input values.
Discrimination threshold discrimination threshold
so that a minimal change in the input instrument perceived a change in response. For example: the balance pointer generation minimum displacement visible change is responsible for carrying 90mg, the balance force threshold discrimination is 90mg.
Resolution resolution
instrument indicating means may be a meaningful indication of the amount is the ability to distinguish two close values.
Stability of stability
under predetermined operating conditions, the performance characteristics of the instrument remains unchanged capacity within the specified time.
Drift drift
instrumentation input - output characteristics of slow change over time.
Point floating point drift
under predetermined operating conditions, corresponding to a change in the output of a constant input in a predetermined time.
Zero drift zero drift
referred zero drift
point drift upper limit value of the range. The current limit is not zero, also known as the starting point drift value.
Repeatability repeability
coincide with each other between the output value of the degree under the same operating conditions, the input values for the same instrument in the same direction repeatedly measured.
Note: Repetitive should not include hysteresis, drift.
Repeatability repeatability error
in the whole measurement range and under the same operating conditions, for the same input values from the same direction several successive random measurement error obtained.
Scale error span error
ratio operating conditions, the actual output difference in a predetermined range and the output range of the reference. Usually expressed as a percentage of a predetermined output range.
Span shift (offset) span shift
changes due to the influence of certain output range of the amount due.
Zero error zero error
under reference operating conditions, when the lower limit value of the input range of the difference in actual output value and the predetermined output range. When the lower limit is not a zero value, also known as the start point error.
Zero shift (offset) zero shift
when the input is in the range limits, since the change amount due to the influence of some output values. When the lower limit is not a zero value, also known as migration start point (offset).
Error error of indication a diagram
illustrating instrumentation value by subtracting the measured [convention] true value.
Reference fiducial error error
indication instrument error divided by a predetermined value.
NOTE: This value is often referred to as a predetermined reference value, for example: it may be a range or upper limit of the range of instrumentation and the like.
Sampling samples
at regular intervals during the measurement of the value.
Sampling [rate] of sampling rate
of the sampling frequency to be measured, i.e. the sampling number per unit time.
Sampling time sampling time
the sample is detected during the measurement time.
Scanning rate scan rate
samples the number of analog input channels [speed] ratio, expressed as the number of channels per input.
Preheating time warm-up period, warm-up time
instrument is powered up to the time it reaches a predetermined desired performance.
Input impedance input impedance of
the impedance between the input terminal of the instrument instrument.
Impedance output impedance output
impedance between the output terminal of the instrument.
Load impedance load impedance
of all instrumentation and means connecting the output terminal connecting wires and the sum of the impedance.
[Electrical] consumption electrical power consumption
the maximum power at steady state, within its instrumentation required for the operating range.
Air consmption air consumption
at steady state, the maximum flow rate of gas instruments within its operating range consumed.
Effect of operating conditions operating influence
when all other operating conditions are kept constant, since the reference operating conditions to change the reference value of a predetermined value to a change in performance in normal operating conditions generated instrumentation.
① generally normal working conditions, as a predetermined lower limit value.
② If the change in the relationship between working conditions and working conditions that affect the non-linear, may be different coefficients respectively predetermined intervals, for example: 220V to 230V by the range of 0.01% / V; 230V to 240V by the range of 0.15% / V .
Response characteristic response characteristics
under a predetermined condition, the corresponding relationship between the amount of input output.
① This relationship can be established on the basis of theoretical research or experiments, it can, in the form of table or graph represents the number of algebraic equations.
② When the amount of change in the input is a function of time, the response characteristic is one form of the transfer function.
Response time response time
a predetermined amount of a change in an input causes output changes with time.
Step response step response
time due to a step change in response to the input.
Response slope ramp response
a change in the slope of the input jumped from zero to a finite value of the time response due.
Impulse response of the impulse response
is applied to a pulse function of time in response due to one input.
Frequency response frequency response
linear system, the output signal of the Fourier transform of the ratio of the Fourier transform corresponding to the input signal.
Steady state steady-state
parameters of the system remains constant.
NOTE: For example, the characteristic parameter is the rms value of the sinusoid, the frequency and initial phase.
Transient transient
state variables at the time of rapid transition between two steady state.
Transfer function the transfer function
within the predetermined range of conditions, the expression should be input and output phase as a function of the relationship between amount.
Gain GAIN
in steady linear system, the amplitude (or power) of the output signal corresponding to the input signal amplitude (or power) ratio.
Attenuation attenuation
is reduced in the signal transmission system.
Delay dead time
when, also known as dead.
Changes instantaneously generated from the input amount of time until the moment played instrument output starts to change.
Damping damping
dissipation of energy during exercise system.
Cycle damping periodic damping, underdamping
also known as under-damped.
Step rushing damped response appeared.
Aperiodic damped aperiodic damping, overdamping
also known as over-damped.
Step response without overshoot damping.
Critical damping critical damping
intermediate form between a damper and a damping period aperiodic damping.
Note: Although there have been punch but does not exceed a specified value (generally related to the basic error), can still be considered to be critically damped.
Damping torque damping torque
movable portion stops swinging moment, the direction of rotation in a direction opposite to the movable portion, proportional to the size and speed.
Damping moment coefficient damoing torque coefficient
movable portion having a damping torque per unit angular velocity.
Damping factor damping factor
in the free-running second order linear system, the output ratio of the final steady-state value in the vicinity of one pair (opposite direction) continues to oscillate with a greater amplitude of the smaller magnitude.
Transient overshoot transient overshoot
in the step response, output exceeds the maximum transient deviation of its final steady state value.
Time constant time constant
first order linear system caused by the step or pulse input, the output of the total completion time of the rise or fall of 63.2% of the total required.
Rise time rise time
for the step response, instantaneously became a small percentage (e.g. 10%) from the final steady-state value reaches a predetermined output signal from zero, and to reach the large first predetermined percentage of the steady-state value (e.g. transient time until 90%).
Settling time settling time
of the input signal from the step change, the output signal deviates from the final steady-state value of the time tolerance (e.g., 1%) does not exceed a predetermined time.
Note: with instrumentation indicating means, the damping time known as the settling time.
Step response time step response time
when the input step change is generated, the output of the predetermined time difference between the final steady-state value and the initial steady-state value of the percentage of first arrival from the initial value.
Ramp response time ramp response time
from the start ramp input is applied to the output holding time within a predetermined tolerance band required by a static input gain value obtained by subtracting the steady-state output of the first-order deviation value.
Frequency response characteristics [FIG] frequency response characteristic
logarithmic gain and phase angle as a function of the frequency of a graphical representation, usually expressed on a logarithmic scale.