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P276
Transient Temperature Error (See ISA 37.2, Section 6.8) – Capability to withstand a change in temperature within a specified time frame, defined as a % of unamplified full scale output (voltage, charge, etc.) shift in output from the pressure transducer when exposed to a thermal transient event quantified in degrees per second.
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P277
Zero Change with Temperature – The zero shift due to changes of the ambient temperature from room temperature to specified limits of the operating temperature range.
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Frequency
P281
(often called the frequency response) [23]. The amplitude response characterizes the frequency dependent amplification and/or attenuation of the pressure signal due to mounting and/or packaging resonances, and in some instances the resonant frequency (also referred to as natural frequency) of the sensing element.
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P285
Flat Frequency Response – The frequency range defined in Hertz (Hz) over which the transducer’s output exhibits deviations from a sinusoidal dynamic input measurand by less than ±25% or ±2dB of the measurand.
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P287
Frequency Dependent Sensitivity – The ratio of the change in transducer output to a varying sinusoidal measurand. Frequency dependent sensitivity is defined in terms of dB re 1V/Pa.
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P288
Frequency Range – Quantification technique described in Section 5.2.1 and 5.2.2 of ISA RP37.2-1964 for capacitive transducers. The frequency range specifies the frequency range a transducer is expected measure and produce output within the specified tolerances.
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P289
Frequency Response 1 – The change with frequency of the output/measurand amplitude ratio (and of the phase difference between output and measurand), for a sinusoidal varying measurand applied to a transducer within a stated range of measurand frequencies.
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P291
NOTE: Frequency response should be referred to a frequency within the specified measurand frequency range and to a specific measurand value.
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P292
Linear Phase Response – A linear change in phase angle with frequency, indicating a constant time delay at any measurand frequency.
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P293
Lower Cutoff Frequency – The lowest frequency of measurand the transducer responds to.
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