Satel DG-1 Manual de Usario
Satel
detector de gases
DG-1
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DG-1
DIGITAL GAS DETECTORS
dg1_en 06/18
The DG-1 detectors are designed to detect dangerous concentrations of:
DG-1 CO – carbon monoxide,
DG-1 LPG – propane-butane gas,
DG-1 ME – natural gas (methane),
DG-1 TCM – soporific gases (e.g. chloroform vapors).
The detectors are intended to be used as part of a security system. This manual applies to
the detectors with electronics version 2.0.
1. Features
Digital algorithm of gas detection.
Digital temperature compensation.
Prealarm feature (DG-1 LPG and DG-1 ME only).
LED for optical signaling.
Sounder for acoustic signaling.
Supervision of gas sensor (not applicable to DG-1 CO) and supply voltage.
Tamper protection against cover removal.
2. Description
Electronics board
Fig. 1 shows the electronics board of DG-1 CO detector.
terminal block:
NC - alarm output (NC relay),
TMP - tamper output (NC),
COM - common ground,
12V - power input.
LED indicator. LED color depends on the
detector:
DG-1 CO: red,
DG-1 LPG: green,
DG-1 ME: yellow,
DG-1 TCM: blue.
gas sensor. Sensor type depends on the
detector (the sensors differ in shape):
DG-1 CO: TGS5141,
DG-1 LPG: TGS2610,
DG-1 ME: TGS2611,
DG-1 TCM: TGS832.
tamper switch.
2 DG-1 SATEL
fixing screw hole.
pins for enabling/disabling sound signaling (jumper installed – signaling enabled; jumper
removed – signaling disabled).
Detecting dangerous gas concentrations
The detector will alarm when it senses a dangerous gas concentration. For information about
the gas concentrations that trigger an alarm, please refer to Table 1. The alarm is signaled by
sound and by LED indicator (repeating sequence: sound/LED ON for 1 second followed by
1-second pause, etc.). When the alarm is being signaled, the alarm output is active (relay
contacts are open). The detector will stop alarming when the gas concentration drops below
the dangerous level. The gas sensor reaction to a decrease in the dangerous gas
concentration is delayed, hence the alarm signaling can stop even a few minutes after
the gas concentration has dropped below the alarm level.
DG-1 CO DG-1 LPG DG-1 ME DG-1 TCM
Gas
concentration to
trigger alarm
50 ppm for 75 minutes
100 ppm for 25 minutes
300 ppm for 1 minute
20% lower explosive limit 6000 ppm CHCl3
Gas
concentration to
trigger prealarm
- 10% lower explosive limit -
Table 1.
The DG-1 LPG and DG-1 ME detectors signal prealarm. For information about the gas
concentrations that trigger a prealarm, please refer to Table 1. Prealarm is signaled by sound
and by LED indicator (repeating sequence: sound/LED ON for 0.25 second followed by
1-second pause, etc.). Prealarm does not affect the state of alarm output. The detector keeps
signaling prealarm as long as the methane/propane-butane concentration remains above the
10% and below the 20% lower explosive limit.
Supervision of gas sensor and supply voltage
The detector will report trouble in the event of sensor defect (not applicable to DG-1 CO) or
when the supply voltage drops below 9 V (±5%) for longer than 2 seconds. Troubles are
signaled by sound and by LED indicator (repeating sequence: sound/LED ON for 0.25
second followed by a 0.25 second pause, etc.). When the alarm is being signaled, the alarm
output is active (relay contacts are open).
3. Installation and commissioning
Disconnect power before making any electrical connections.
The DG-1 digital gas detectors are designed for indoor installation.
Considering specific character of the gases to be detected, the DG-1 TCM and
DG-1 LPG detectors should be mounted in low position, just above the floor,
the DG-1 ME detector in high position, just under the ceiling, and DG-1 CO
detector at a height of about 1.5 meter.
1. Open the detector enclosure (Fig. 2).
SATEL DG-1 3
2. Remove the electronics board.
3. Make suitable openings for screws and cable in the enclosure base.
4. Pass the cable through the opening prepared.
5. Secure the enclosure base to the wall.
6. Fasten the electronics board.
7. Connect the leads to corresponding terminals.
8. Using the jumper, decide whether the sound signaling is to be enabled, or not.
9. Close the detector enclosure, making sure that the matchmarks on the cover and on the
enclosure base are aligned (Fig. 3).
10. Switch on power supply of the security system. Putting the detector into operation is
signaled by three short sounds, accompanied by blinking of the LED.
Notes:
It is not recommended to install the detector in spaces where industrial type equipment is
working.
During the detector operation the gas sensor heats up.
Especificaciones del producto
| Marca: | Satel |
| Categoría: | detector de gases |
| Modelo: | DG-1 |
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