B
Breaking force
Force of the force transducer above which mechanical destruction is to be reckoned with.
D
Degree of protection
Degree of protection provided by the enclosure according to DIN EN 60529. It indicates to what extent the force transducer is protected from humidity and dust as well as from the ingress of solid foreign bodies.
F
Force limit
Force above which permanent significant changes in the metrological properties of the force transducer are to be reckoned with.
H
Hysteresis
Reversibility error / 0,5 · Fnom.
I
Input resistance
Ohmic resistance of the force transducer measured between the excitation/supply voltage connections.
Insulation resistance
Ohmic resistance, measured between the connecting lines and the elastic body of the force transducer. The test voltage is to be stated.
M
Maximum operating force
Greatest force of the force transducer up to which there is a defined and repeatable relation between force and output signal but any protection against overloading does not yet operate.
Mechanical shock resistance according to DIN EN 60068-2-27
Resistance of the force transducer to impact load (mechanical shocks) without permanent significant changes in the metrological properties of the force transducer being produced up to rated force.
Note: The severity level used in testing according to DIN EN 60068-2-27 is to be stated (number of shocks, duration of mechanical shocks, shock acceleration).
O
Output resistance
Ohmic resistance of the force transducer, measured between the output voltage connections.
R
Rated characteristic value
(Theoretical) target value for the characteristic value.
Rated displacement
Spring excursion of the outer force introduction points or surfaces of the force transducer in the direction of measurement relative to one another due to loading with rated force. (The mounting and measurement conditions are to be stated).
Rated force
Greatest force for which the transducer is nominally designed, i. e. up to which the manufacturer’s metrological specifications are complied with.
Rated range of excitation voltage
Range of the excitation voltage in which the force transducer complies with the error limits for its technical data.
Note: For force transducers with integrated electronics, the supply voltage is substituted for the excitation voltage.
Rated temperature range
Range of the ambient temperature in which the force transducer complies with the error limits for the temperature-dependent technical data.
Relative creep (30 min)
By creep the time-dependent variation of the output signal of the force transducer after force variation is understood. A distinction is to be made between:
• creep under load
• creep when load is relieved
Note: To obviate the prior history of the force transducer, the latter is to be loaded once with rated force. After preloading, five times the time of preloading must elapse before starting the measurement proper.
Relative deviation of zero signal
Maximum deviation of the zero signal in the removed state, in relation to the rated characteristic value, from the value zero.
Relative linearity error
Maximum deviation of a characteristic curve of a force transducer, determined at increasing force, from the reference straight line, in relation to the upper limit of the measurement range used. The measurement range is to be stated.
S
Sensitivity error
Relative deviation of the characteristic value from the rated characteristic value. (This statement is common practice for transducers whose characteristic value has been adjusted.)
Storage temperature range
Range of the ambient temperature in which the mechanically and electrically unstressed force transducer may be stored without permanent significant changes in the metrological properties of the transducer being detectable when using the transducer again within the rated temperature range.
T
Temperature effect on zero signal
Variation of the zero signal of the force transducer, in relation to the rated characteristic value, due to variation of the ambient temperature, Ti by 10K, within a defined temperature range after steady states free of gradients have been adjusted.
(The greatest value of TK0 and the temperature range are to be stated.)
Temperature effect on characteristic value
Relative variation of the characteristic value of the force transducer due to variation of the ambient air, Ti by 10K, within a defined temperature range after steady states free of gradients have been adjusted. (The maximum value of TKC and the temperature range are to be stated.)
V
Vibration resistance according to DIN EN 60068-2-6
Resistance of the force transducer to forced sinusoidal oscillations of specified severity without permanent significant changes in its metrological properties being detectable up to rated force.
Note: The severity level used in testing according to DIN EN 60068-2-6 is to be stated (frequency range, amplitude of the acceleration, duration of stress).
W
Weight
Mass of the force transducer without force introduction parts.