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Detectores electrónicos de gas y humo

When used with gas and smoke sensors (refer to page 102), GRM continuously monitors explosive gases, vapours and/or smoke and generates alarms.
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DETECTORES ELECTRONICOS DE GAS Y HUMO

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APLICACION MODELO TECNOLOGIA MARCA
Alarmas (GRM)   Afriso
FUNCION CODIGO SECCION
Detectores electrónicos de gas y humo. 09-2001 09

Electronic gas and smoke detector GRM.

When used with gas and smoke sensors (refer to page 102), GRM continuously monitors explosive gases, vapours and/or smoke and generates alarms.

The GRM electronic gas and smoke detector is installed in boiler rooms and basements, storage, office and living rooms as well as public facilities or industrial buildings for increased safety (building technology). The evaluation unit is designed for either wall mounting or control panel mounting by means of a mounting frame. For arduous applications a sealing set (IP 54) is available GRM has an alarm threshold and is fitted with a relay contact. When the threshold value is exceeded, the unit generates an alarm signal. The red "Alarm" LED lights up and the alarm relay switches. An additional integrated buzzer provides an audible alarm. This audible alarm can be muted with the re-set button. If the condition which caused an alarm is cleared, the visual alarm can then also be re-set by once again pressing the re-set button. Only then can the alarm be muted with the re-set button. However, if the gas concentration level is still above the alarm threshold level, muting of the alarm is not possible. Using the voltage-free changeover contact additional alarms or units such as horns, lamps, ventilator fans etc. can be operated and controlled.

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The following sensor combinations are possible:
1. 1 gas and 1 smoke sensor
2. 2 gas sensors
3. 2 smoke sensors
4. 1 gas sensor
5. 1 smoke sensor


Sensor types:

  • Gas sensor Part no. 61188 A (for methane)
  • Gas sensor Part no. 61189 A (for propane/butane)
  • Smoke sensor Part no. 61151


Technical specifications

Supply voltage: AC 230 V
Power consumption: 15 VA
Inputs: 2 sensors, Connection cable, 3 cores, cross section over 0.5 mm2, max. distance evaluation unit – sensor: 150 m
Alarm threshold 1 permanently fixed alarm threshold for alarm generation at 20 % LEL (for gases) with alarm memory
Alarm Red LED and integrated buzzer (approx. 70 dB (A))


Indicators/outputs

  • 1 green LED – operational
  • 1 red LED – blinking for fault – permanently on for alarm
  • 1 relay with voltage-free changeover contact


Contact rating: AC 250 V, 2 A
Operating temperature range 0 °C/+40 °C
Weight: 0.55 kg
Design Suitable for wall mounting (control cabinet mounting possible with additional frame)
Housing: Wall mounting housing made from impact resistant plastic (ABS)
W x H x D: 100 x 188 x 65 mm
Protection: IP 40 (EN 60529)

 

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Gas and smoke sensors for GRM electronic gas and smoke detectors

Gas sensor
Semiconductor gas sensor in plastic housing for connection to electronic gas and smoke detector GRM (refer to page 101). To be used in dry rooms (e.g. heating installations). Detectable gases: methane, butane, propane. LEDs indicate the operating and alarm state of the system also at the sensor:
 

  • LED green – operational
  • LED yellow – fault
  • LED red – gas alarm


The sensors must be calibrated for the relevant gas. Please specify the gas to be monitored when ordering.

Technical specifications
Measured gases
Inflammable gases and vapours in ambient air
Measuring range 0 to 50 % LEL
Measuring principle Semiconductor (service life approx. 5 years, depending on operating conditions)
Operating temperature range 0 °C/+40 °C
Humidity Max. 75 % relative humidity
Housing Wall mounting plastic housing
W x H x D: 80 x 80 x 35 mm
Weight: approx. 100 g

Smoke sensor
Photoelectronic smoke sensor in plastic housing for connection to electronic gas and smoke detector GRM (refer to page 101). To be used primarily in domestic dwellings (such as living rooms, bedrooms, halls, staircases, corridors). The operating and alarm state is indicated both at the alarm device (GRM) and at the smoke sensor:

  • Visual indication via LED green/red at GRM and LED red/red at the smoke sensor.
  • Audible alarm via internal piezoelectric buzzer in alarm unit GRM and at the smoke sensor.


Calibration for gas sensor
Prior to shipment, the gas sensors listed above are calibrated to the gas specified by the customer. Therefore, please always indicate the gas type when ordering.

Technical specifications
Sensor
Photoelectronic
Measuring principle Scattered light principle
Supply voltage DC 12–28 V
Audible alarm 85 dB (A) (at a distance of 3 m)
Test button For sensitivity, audible alarm
Operating temperature range +5 °C/+39 °C
Humidity Max. 80 % relative humidity
Housing Wall mounting plastic housing
Outside dimensions Ø 155 mm, height 38 mm
Electrical connections Screw terminal strip
Weight Approx. 195 g








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