Document ID: chunk:federal_register_of_legislation:F2005L03990:front:0:p24
Version: federal_register_of_legislation:F2005L03990
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barrier as provided for in paragraph 6 of annex 3 to this Regulation.
1.8. Equivalent method
 The test may be performed by some other method than that of deceleration of a trolley, provided that such method complies with the requirement concerning the range of variation of speed described in paragraph 1.6.

Annex 7 – Appendix 1

EQUIVALENCE CURVE - TOLERANCE BAND FOR CURVE  V = f(t)

Annex 8

TECHNIQUE OF MEASUREMENT IN MEASUREMENT TESTS: INSTRUMENTATION

1. DEFINITIONS
1.1. Data channel
 A data channel comprises all the instrumentation from a transducer (or multiple transducers whose outputs are combined in some specified way) up to and including any analysis procedures that may alter the frequency content or the amplitude content of data.
1.2. Transducer
 The first device in a data channel used to convert a physical quantity to be measured into a second quantity (such as an electrical voltage) which can be processed by the remainder of the channel.
1.3. Channel amplitude class: CAC
 The designation for a data channel that meets certain amplitude characteristics as specified in this annex. The CAC number is numerically equal to the upper limit of the measurement range.
1.4. Characteristic frequencies FH, FL, FN
 These frequencies are defined in figure 1.
1.5. Channels frequency class: CFC
 The channel frequency class is designated by a number indicating that the channel frequency response lies within the limits specified in figure 1. This number and the value of the frequency FH in Hz are numerically equal.
1.6. Sensitivity coefficient
 The slope of the straight line representing the best fit to the calibration values determined by the method of least square within the channel amplitude class.
1.7. Calibration factor of a data channel
 The mean value of the sensitivity coefficients evaluated over frequencies which are evenly spaced on a logarithmic scale between FL and FH/2.5
1.8. Linearity error
 The ratio, in per cent, of the maximum difference between the calibration value and the corresponding value read on the straight line defined in paragraph 1.6. at the upper limit of the channel amplitude class.
1.9. Cross sensitivity
 The ratio of the output signal to the input signal, when an excitation is applied to the transducer perpendicular to the measurement axis. It is expressed as a percentage of the sensitivity along the measurement axis.
1.10. Phase delay time
 The phase delay time of a data channel is equal to the phase delay (in radians) of a sinusoidal signal, divided by the angular frequency of that signal (in radians/second).
1.11. Environment
 The aggregate, at a given moment, of all external conditions and influences to which the data channel is subjected.
2. PERFORMANCE REQUIREMENTS
2.1. Linearity error
 The absolute value of the linearity error