GB 27900-2026Firefighter personal alert safety systems (English PDF)

5.2 Basic Functional Requirements

5.2.1 Pre-alarm function When the emergency call device is in automatic mode, it should have a pre-alarm function. When the allowed standby time exceeds (30±2) s, the distress caller should be able to emit an audible and visual alarm signal. During the pre-alarm period, the distress caller's location will be indicated. When changes occur or the vehicle undergoes accelerated motion with an acceleration greater than 5 m/s^2, the pre-alarm audible signal should be immediately deactivated.

5.2.3 Manual Alarm Function When the distress call device is in manual alarm mode, it should be able to emit audible and visual alarm signals. During manual alarm operation, the alarm sound and location indicator should be activated. The strobe signal should not be affected by changes in the operating position or speed of the distress caller, and should only be manually activated by repeatedly double-clicking the SOS button. eliminate. The manual alarm sound level of the distress call device should not be less than 100 dB(A). The frequency and pitch variation period of the manual alarm sound of the distress call device should meet the requirements of Table 3.

5.2.4 Battery level display and low battery alarm function The emergency call device should be able to display the battery level via a screen or indicator light. The distress call device should have a low battery alarm function and should be able to emit audible and visual alarm signals. When the distress call device emits a low battery alarm, its normal operating time should be [not specified]. It should not be less than 1 hour. The low battery alarm sound level of the distress call device should not be less than 65 dB(A). The frequency and pitch variation period of the low battery alarm sound of the distress call device should meet the requirements of Table 3.

5.2.5 Temperature alarm function For emergency call devices with temperature alarm functions, they should be able to emit audible and visual alarm signals when operating in an environment with a temperature not lower than 80°C. The alarm number should be set, and the time for triggering the temperature alarm should not exceed 30 minutes. The sound level of the emergency call device's temperature alarm should not be less than 100 dB(A). The frequency and pitch variation period of the alarm sound should meet the requirements of Table 3.

5.2.6 Direction Indication Function The distress call device should have directional indicator lights on all four sides of its front. These indicator lights should emit red or yellow light, especially in smoke. In the environment, it should be able to indicate the location of the distress call device. The flashing frequency of the distress signal indicator light should meet the following requirements.

a) Under normal operating conditions, the directional lights flash once every 2s ± 0.1s;

b) Under each alarm state, the directional light flashes once every 1s ± 0.1s.

5.3 Basic Performance Requirements

5.3.1 Luminous brightness When the distress call device is fully charged, its luminance should not be less than 500 cd/m2 when it is emitting light.

5.3.2 Insulation performance The insulation performance of distress call devices should meet the following requirements.

a) The insulation resistance between the positive and negative electrodes and the outer casing should not be less than 50 MOmega under normal operating conditions;

b) The insulation resistance between the positive and negative electrodes and the outer casing should not be less than 10 MOmega after the damp heat test.

5.3.3 Weather resistance performance The distress call device shall undergo the various climatic and environmental tests specified in Table 4, and shall meet the requirements of 5.2.1, 5.2.2, and

5.2.3 after the tests.

5.3.4 Resistance to mechanical environment The distress call device should undergo all the mechanical environmental tests specified in Table

5.After the tests, there should be no mechanical damage or loosening of fasteners, and it should... It meets the requirements of

5.3.5 Electromagnetic compatibility performance The distress call device should be able to withstand the electromagnetic compatibility performance test specified in Table 6, and there should be no abnormalities during the test. After the test, it should meet the requirements of 5.2.1. Requirements of

5.2.2 and 5.2.3.

5.3.6 Salt spray resistance The distress call device shall be subjected to a salt spray test in a non-powered state for 72 hours. After the test, it shall meet the requirements of

5.3.7 Performance of Orientation in Simulated Smoke Environments In a dense smoke environment where objects are not visible to the naked eye at a distance of 1 meter, the directional light of the distress call device should be able to indicate the location of the distress call device.

5.3.8 Flame retardant properties After the flame retardant performance test, the distress call device should not melt, and the afterflame time should not exceed 5 seconds.

5.3.9 Quality The quality of distress call devices should meet the following requirements.

5.3.10 Continuous working time and continuous alarm time

5.3.10.1 Continuous working time and continuous alarm time of ordinary emergency call devices The continuous operating time and continuous alarm time of a standard emergency call device should meet the following requirements.

a) When all functions of a standard emergency call device, except for the audible alarm, are functioning normally, the continuous operating time should not exceed [a certain limit]. Less than 24 hours;

b) When all functions of a standard emergency call device are in normal working order, the continuous alarm time should not be less than 240 minutes.

5.3.10.2 Continuous operating time and continuous alarm time of communication-type emergency call devices 5.3.10.2.1 Continuous operating time and continuous alarm time of communication-type emergency call devices without satellite communication. For communication-type distress call devices that do not utilize satellite communication, their continuous operating time and continuous alarm time should meet the following requirements.

a) A distress call device with one or more of the following functions. image transmission, thermal imaging, and gas detection, excluding the audible alarm function. When all functions are in normal working condition, the continuous working time should not be less than 4 hours;

b) A distress call device possessing one or more of the following functions. image transmission, thermal imaging, and gas detection; all of its functions are fully integrated. Under normal operating conditions, the continuous alarm time should not be less than 120 minutes;

c) Communication-type distress call devices that lack image transmission, thermal imaging, and gas detection capabilities, except for audible alarm functions. When all functions are in normal working condition, the continuous working time should not be less than 8 hours;

d) Communication-type distress call devices that do not have image transmission, thermal imaging, or gas detection functions, but all their functions are in normal working order. When in a state of emergency, the continuous alarm time should not be less than 180 minutes.

5.5.5 Requirements related to gas detection function

5.5.5.1 Gas detection and alarm function Emergency call devices with gas detection capabilities should at least be able to automatically identify carbon monoxide, hydrogen sulfide, ammonia, chlorine, sulfur dioxide, oxygen, and formaldehyde. The function of determining the concentration of one or more gaseous components such as alkane. Emergency call devices with gas detection capabilities should have audible and visual alarm functions, and should be able to issue audible and visual alarm signals when the detected concentration exceeds the standard. The specific requirements for the audible and visual alarm signals of distress call devices with gas detection capabilities are as follows:

a) When an audible alarm is triggered, the alarm sound level intensity should not be less than 100 dB(A), and the alarm sound frequency and pitch variation period should conform to Table 7. According to relevant requirements, after the distress call device emits an audible and visual alarm, the audible alarm should be manually silenced by double-clicking the SOS button.

b) Emergency call devices with gas detection capabilities should be equipped with a dedicated gas concentration exceeding the limit alarm indicator. When the emergency call device detects a high gas concentration... When the gas concentration exceeds the standard, the alarm indicator light should turn red; when the gas concentration does not exceed the standard, the alarm indicator light should turn green.

5.5.5.2 Detection indication error and alarm error For emergency call devices with gas detection capabilities, their detection indication error and alarm error should meet the following requirements.

a) The indication error of the contact gas detection emergency call device shall meet the requirements of 5.2.1.1e) in GB 12358-2024.

b) The alarm setting and alarm value error of the contact-type gas detection emergency call device shall comply with

5.2.1.2 of GB 12358-2024. Requirements

c) The detection indication error, alarm value setting error, and alarm warning value error of the non-contact gas detection emergency call device should meet the following requirements. The requirements of 5.2.1.4e in GB 12358-2024.

5.5.5.3 Response Time The response time of emergency call devices with gas detection function should meet the requirements of

5.2.4 in GB 12358-2024. For emergency call devices equipped with gas detection capabilities, especially those using non-contact gas detection methods, if a pump-type gas sampling method is employed, the instrument... Under the maximum gas sampling distance and flow rate specified by the device, the gas sampling time through the gas sampling pipe should not exceed 30 seconds, and a gas path fault alarm should be provided. Function.

5.5.6 Requirements related to water inrush alarm function

5.5.6.1 Basic Functions A distress call device with a water-fall alarm function should have the following basic functional requirements.

a) Rescue calls with a water-fall alarm function should have this function, and the communication platform should be able to receive the water-fall alarm after the rescue call falls into the water. warning signal;

b) A rescue device with a water-fall alarm function, when all its functions are in normal working order, should have a continuous working time of not less than 24 hours;

c) Rescue devices with a water-fall alarm function should also have a low battery alarm function;

d) Power-on and power-off methods. A rescue call device with a water-fall alarm function should automatically turn on after a 10-second delay following immersion in water. The power-off method is manual. Automatically close;

e) Positioning Function. Rescue devices with a water-fall alarm function should have satellite positioning capabilities. When positioning is possible, they should be able to respond in real time. The system transmits location information such as longitude, latitude, and time to the communication platform; it also features a water-fall alarm function in cases where location is unavailable. The distress call device should be able to send the data from the last successful location to the communication platform;

f) Alarm Function. A rescue device equipped with a water-falling alarm function should be able to communicate via public network, private network, or other means after activating the water-falling alarm function. One or more satellite communication methods will be used to send alarm signals to the communication platform;

g) Operational status display function. Rescue devices with a water-fall alarm function should have an operational status display function, which should be indicated by indicator lights. Water ingress alarm status;

h) False alarm prevention function. Rescue devices with water alarm function should have devices or measures to prevent accidental activation or shutdown;

i) Alarm cancellation function. The user of a rescue device with a water-falling alarm function should have the ability to manually cancel the alarm;

j) Positioning accuracy. In open areas, the positioning error of a distress call device with a water-fall alarm function should not exceed 10m;

k) Positioning Time. For emergency call devices with a water-fall alarm function, the initial positioning time after each power-on should not exceed 180 seconds, and the positioning data should be recorded. Data and time are sent to the communication platform; subsequent positioning times should not exceed 60 seconds.

l) Alarm frequency. For distress call devices with a water-fall alarm function, if public network communication or private network communication is used, an alarm should be sent every 5 seconds. Data should be transmitted once; if satellite communication is used, data should be transmitted every 10 minutes within the first 120 minutes; after 120 minutes, data should be transmitted... Data should be transmitted every 60 minutes; if the distress call device moves more than 10 meters, data should be transmitted every 2 minutes. When the location is fixed... If the movement is no more than 10m, data should be sent every 60 minutes.

5.5.6.2 Data Interoperability Requirements A distress call device with a water-fall alarm function should use one or more of the following communication methods. public network communication, private network communication, and satellite communication. A distress call device with a water-fall alarm function should be able to interact with a communication platform or communicate with a communication platform through a data gateway. Interactive, distress call, or data gateway communication data shall comply with the requirements of Appendix A.