Characteristics of emergency telephone sets in pipe gallery _ Parameters of emergency intercom telephone sets _ Working conditions of emergency explosion-proof telephone sets in city comprehensive pipe gallery

Characteristics of emergency telephone sets in pipe gallery _ Parameters of emergency intercom telephone sets _ Working conditions of emergency explosion-proof telephone sets in city comprehensive pipe gallery

Product Description:

I. Product features

1. It has the function of telephone and the broadcasting function of sound amplification;

2. Multiple interfaces meet the requirements of multiple systems for broadcast communication terminals;

3. There are different ringing bells with multiple prompts, including emergency alarm bell and ordinary bell;

4. It has power supply indication and noise indication, and adopts high-end noise reduction and amplification technology;

5. Stainless steel touch keys and high strength ABS engineering plastic handle, durable;

6, wall-mounted installation, using a new fork cover switch mechanism, no movable parts on the phone;

7. There are spare batteries in the device, which can be automatically put into the device in case of ac power failure and can work continuously for 2 hours;

8. The shell is made of antistatic reinforced polyester moulded, waterproof, dustproof and corrosion-proof, with the protection grade up to IP65, suitable for extremely harsh environment;

9. The output power of the power amplifier can be adjusted by rotating clockwise to increase the output power and counterclockwise to decrease the output power.Power 2-5W adjustable (starting at 3W);

10. The button is fully sealed stainless steel touch button and equipped with emergency call and other functions. In case of emergency, lift the handle from the phone and press the "tight call" button to directly talk to the user and the scheduler;

11, adjustable ring number, have been adjusted when delivery from factory to ringing three times automatically open amplification, after the ringing to set the number of times, amplifying the phone automatically open amplification circuit, call the user to hear, "ding dong" prompt prompt pa pa phone at this time, the other party hang up, speaker output busy after four tones, pa automatically shut down;

Ii. Product parameters

1. Frequency offset: no more than ±1.5%;

2. Environmental noise: ≤95dB (A);

3. Amplification distortion: no less than 5%;

4. Dc open circuit voltage of telephone line: 40-64V;

5. Dc feed current of telephone line: 25-60mA;

6. Amplifier power :5-10W adjustable (factory set at 10W);

7. Frequency response: no more than 6dBm (400-3000Hz);

8. Fluid flow signal: Frequency: 25Hz±3Hz;Intermittent ratio: 1s: 4S;Level: 75±15V;

9. Loudness of the amplified sound: the loudness of the amplified sound of the station is not less than 100dB (A), and the power is adjustable from 1-5W;

10. Pulse dialing: Discontinuous ratio of dialing pulse :1.6±0.2:1 Dialing pulse rate: 10±1 times/second;

11. Dual audio dialing: Standard frequency: low frequency group 695Hz770Hz852Hz941Hz high frequency group;

12. Frequency response: the frequency shall not exceed ±3dB within 350HZ-3400Hz (test conditions: input 1000Hz, 250mV);

13. Audio output signal: When the audio input is 1000Hz and 250mV, the audio output signal ≥300mV;Distortion ≤7%;

14. Sound intensity of signal: at 1000Hz and 250mV of audio line input, it shall be not less than 95dB (A weight), and the horn distortion shall be ≤7%;

15. Busy signal: Frequency: 450Hz±20Hz;Intermittent ratio :(0.3-0.4) s :(0.3-0.4) s;Level: -8dbm --12dBm;

16. Backup battery: Ni-Cd battery AJ-19.2V/2000mAH;Specification: 2AH19.2V (16 section series) Charging voltage: 22-25V Charging current: 125-170mA;

Iii. Working conditions

1. Operating temperature: -15-40℃;

2. Atmospheric pressure: 86-106kPa;

3. Working humidity: no more than 95%(at +25°C);

Rated voltage: AC:127V±10% (50HZ) Ground AC:220V, 50HZ AC operating current ≤500mA;

Four, function overview

PBT mine flameproof and safety type extended broadcast station is an explosion-proof communication terminal with high performance and high reliability developed by adopting modern electronic technology and digital noise reduction processing circuit based on our company's long-term experience in the research of industrial production scheduling communication system.Especially suitable for inflammable, explosive and high-noise places, such as coal mine, chemical industry, wharf, power plant, etc., as dispatching and amplification communication and alarm communication terminal.It can solve the communication problem of high environmental noise and high staff mobility in the working area. It has the advantages of easy installation and use, good communication quality, eliminating blind spot of call, etc. It can improve work efficiency and ensure the safety of underground production.PBT mine flameproof and intrinsically safe type broadcast station is a sound amplifying device used in combination with switch or dispatcher, which makes up for the lack of sound spreading function of ordinary telephone. The terminal has excellent anti-noise performance and is an intrinsically safe equipment.DSP digital signal processor is used in the terminal to process the signal through noise reduction calculation method, and then output clear voice signal into the power amplifier, which can obtain good communication effect and amplification effect in high noise environment.