Document ID: chunk:federal_register_of_legislation:F2022C01070:body:0:p9
Version: federal_register_of_legislation:F2022C01070
Segment Type: other
Provision Reference: 
Character Range: 25060–27993

information/display, e.g. :
 of intrusions into the vehicle, e.g. passenger compartment control, window glass control, breakage of any glazed area, or
 of attempted vehicle theft, e.g. inclination sensor
 are allowed, taking account of measures to prevent any unnecessary sounding of the alarm (= false alarm, see paragraph 6.1.2. below).
 Insofar as these additional sensors generate an alarm signal even after an intrusion has occurred (e.g. by breakage of a glazed area) or under external influences (e.g. wind), the alarm signal, activated by one of the above-mentioned sensors, shall be activated not more than 10 times within the same activation period of the VAS.
 In this case the activation period shall be limited by the authorised unsetting of the system as a result of the vehicle user's action.
 Some kinds of additional sensors, e.g. passenger compartment control (ultrasonic, infrared) or inclination sensor, etc. ..., may be intentionally deactivated.  In this case, separate deliberate action must be taken each time before the VAS is set.  It must not be possible to deactivate the sensors while the alarm system is in a set state.
6.1.2. Safety against false alarm.
6.1.2.1. By adequate measures, e.g.
 mechanical design and design of the electrical circuit according to conditions specific to motor vehicles,
 selection and application of operation and control principles for the alarm system and components thereof,
 it shall be ensured that the VAS both in set and unset conditions, cannot cause the alarm signal to sound unnecessarily, in the event of:
 an impact on the vehicle : test specified in paragraph 7.2.13.;
 electromagnetic compatibility : tests specified in paragraph 7.2.12.;
 reduction of battery voltage by continuous discharge : test specified in paragraph 7.2.14.;
 false alarm of the passenger compartment control : test specified in paragraph 7.2.15.
6.1.2.2. If the applicant for approval can demonstrate, e.g. by technical data, that safety against false alarm is satisfactorily ensured, the technical service responsible for conducting approval tests may not require some of the above tests.
6.2. Audible alarm
6.2.1. General
 The warning signal shall be clearly audible and recognisable and shall differ significantly from the other audible signals used in road traffic.
 In addition to the original equipment audible warning device, a separate audible warning device may be fitted in the area of the vehicle which is controlled by the VAS, where it shall be protected against easy, rapid access by persons.
 If a separate audible warning device according to paragraph 6.2.3.1. below is used, the original equipment standard audible warning device may additionally be actuated by the VAS, provided that any tampering with the standard audible warning device (generally more easily accessible) does not affect the operation of the additional audible warning device.
6.2.2. Duration of the