alphanumeric parameters
An alphanumeric parameter allows a structured acquisition of an alphanumeric value. It is described by:
Name alphanumeric [Function state, fault criteria,..]
Value alphanumeric [A, no loss of information ...]
Note alphanumeric [Text]
Operating state
Within the description of the electrical characteristics, it is often necessary to reference to the operating state. The operating state defines the supposed state of the system at a certain requirement. The definition of these states is necessary for a verification of the requirements and for the reproducibility of the tests.
Vehicle network voltage
The vehicle network voltage U B designates the voltage which is applied to the component at a given point of time (e.g. UB = 13 V). In [DIN 40 839;DIN 40 839;;-;], the denomination of vehicle network voltage is used on one hand for nominal voltage and on the other hand for test voltage.
Wide-band interference
A wide-band interference is a band width of an interference signal which is equal to or bigger than the chosen measuring band width of the interference measuring receiver.
Fault description
A fault description serves for an exact description of the function status in case of malfunctions (function state not equal to A). For example, it allows a more exact definition of the effects of a malfunction onto the fault storage (store, not store, loss of data), onto the outputs (triggered, switched off) and how the fault is being treated concerning the display.
The fault description has to be performed in textual form, and is not pre-defined, since a fault generally causes different effects in different systems. Examples for fault descriptions:
1: No fault release
2: Information loss of fault storage
3: Inadmissible input in fault storage
4: Inadmissible triggering of warning lamp
5: Interruption of triggering of output XX
6: Inadmissible triggering of output XX
Function voltage range
The function voltage range U FB is the voltage range within which the vehicle network voltage has to be in order to comply with the specified function (e.g. UFB = 6...16 V).
Additional specifications
The description structure of single data elements (parameters, text, graphics, subject, field) has to be specified such that it is possible to assign a comment (text or graphics) to each data element. All marginal conditions, comments and optional specifications described in the performance specifications, can be realized by means of this supplementary data.
Nominal voltage
The nominal voltage U N is the voltage according to which the electrical system of a car is denominated. The voltage-dependent electrical consumers are generally marked with the nominal voltage (according to [DIN 72 251;DIN 72 251;;-;])
Numerical parameters
A numerical parameter serves for the structured acquisition of a numerical value. It is described by:
Name alphanumeric [Nominal voltage, rise time,..]
Abbreviation alphanumeric [Un, Tr, ... ]
Operator alphanumeric [=, >=, ...]
Value numerical [12 , 0.01, ...]
Unit alphanumeric [V, ms, ...]
Tolerance alphanumeric [ -, 5%, 12 ms]
Note alphanumeric [text]
Test voltage
The test voltage U P is the vehicle network direct current state applied to the DUT if this is not submitted to any interference. In most cases, the test voltage is defined by the battery voltage with the motor at rest (UP = 12 V) or with the generator voltage with the motor running (UP = 13.5 V).
Standard test voltage
The standard test voltage U SP is a general test condition determined by General test conditions (e.g. USP = 13.5 V). When there are no specifications for U P then U P = U SP is valid.
Narrow-band interference
A narrow-band interference is a band width of an interference signal which is smaller than the chosen measuring band width of the interference measuring receiver.
Interference voltage
The interference voltage is the voltage which is measured according to [VDE 0876;VDE 0876;;-;] in dBµV at the vehicle antenna or the artificial network with an interference measuring receiver.
(Central) load-dump protection
Load-dump protection is the limitation of the generator pulse. This protection is central when it is limited to the generator itself. If this is not the case, the protection takes place in the respective components.
Description of the test pulses
The test pulses can be defined by parameters or as well by parameters and graphics, since only a graphic definition of a multitude of parameters makes sense.
Those pulse parameters for which an access by data processing makes sense, are defined as parameters. Further pulse parameters can be defined and set with values in the graphic.