SATEL DG-1 Gas Detectors

Product Overview

The DG-1 series detectors are designed to detect hazardous levels of specific gases and are intended for use as part of an alarm system. This manual applies to detectors with electronics version 2.3.

• DG-1 CO: Carbon monoxide detector
• DG-1 LPG: LPG detector (propane-butane)
• DG-1 ME: Natural gas detector (methane)
• DG-1 TCM: Soporific gases detector (e.g., chloroform vapors)

Important Information

Caution: The device should be installed by qualified personnel. Prior to installation, please read this manual carefully. Changes, modifications, or repairs not authorized by the manufacturer will void warranty rights.

The rating plate is located on the enclosure base. The device is designed for indoor installation and operates on direct current (DC).

The device meets the requirements of applicable EU directives and Eurasian Customs Union technical regulations.

Note: SATEL aims for continuous product improvement, which may lead to changes in technical specifications and software. Current information is available on the SATEL website.

For more information, visit: https://support.satel.pl

The declaration of conformity can be found at: www.satel.pl/ce

Note: This manual uses signs to convey important information: 'Caution' for user and device safety, and 'Note' for suggestions or additional details.

1. Features

• Electrochemical gas sensor
• Digital gas detection algorithm
• Digital temperature compensation
• Prealarm feature (DG-1 LPG and DG-1 ME only)
• LED indicator
• Built-in sounder
• Gas sensor supervision (not applicable to DG-1 CO)
• Supply voltage control
• Tamper protection against enclosure opening

2. Description

Gas detection

Table 1 shows gas concentration levels that trigger an alarm. Prealarm is indicated for DG-1 LPG and DG-1 ME detectors.

Note: The DG-1 TCM detector is not selective. It may alarm due to vapors from paints, lacquers, alcohol, organic compounds (e.g., refrigerants like freon, tetrafluoroethane, chlorodifluoromethane), or even cat urine.

Alarm signaling

Alarm is indicated by:

• Turning on the alarm output
• Flashing of the LED indicator
• Intermittent beep sound

Alarm signaling stops when gas concentration drops below the hazardous level. Sensor reaction delay means signaling may continue for a few minutes after the gas level decreases.

Prealarm signaling

For DG-1 LPG and DG-1 ME detectors, prealarm is indicated by:

• Flashing of the LED indicator
• Intermittent beep sound

The alarm output remains off during prealarm. Prealarm signaling stops when the gas concentration drops below the 10% lower explosive limit.

Trouble

The detector reports trouble when:

• The gas sensor is faulty (not applicable to DG-1 CO).
• Supply voltage is below 9 V (±5%) for more than 2 seconds.

Trouble signaling

Trouble is indicated by:

• Turning on the alarm output
• Flashing of the LED indicator
• Intermittent beep sound

Trouble signaling continues as long as the condition persists.

LED indicator

LED colors vary by detector model:

• DG-1 CO: Red
• DG-1 LPG: Green
• DG-1 ME: Yellow
• DG-1 TCM: Blue

The LED indicates:

• Warm-up: 3 short flashes
• Alarm: Flashing (1 second ON, 1 second OFF)
• Prealarm: Short flash every 2 seconds (0.25 second ON, 1.75 seconds OFF)
• Trouble: Rapid flashing (0.25 second ON, 0.25 second OFF)

Sounder

The sounder indicates:

• Warm-up: 3 short beeps
• Alarm: Intermittent beep sound (1 second ON, 1 second OFF)
• Prealarm: Short beep every 2 seconds (0.25 second ON, 1.75 seconds OFF)
• Trouble: Rapid intermittent beep sound (0.25 second ON, 0.25 second OFF)

Note: The sounder can be disabled by removing the jumper from the BUZ ON/OFF pins.

3. Electronics board

Figure 1 shows the internal components of the gas detector.

• (1) Terminals: NC (alarm output, NC relay), TMP (tamper output, NC), COM (common ground), 12V (power input).
  Note: The detector's alarm output must be connected to a permanently armed zone in the alarm system.
• (2) LED indicator
• (3) Sounder
• (4) Gas sensor: Sensor shape varies by detector model.
• (5) Tamper protection: Protects against enclosure opening.
• (6) Screw: Secures the electronics board.
• (7) Pins for sounder control: Jumper ON enables the sounder; Jumper OFF disables it.

4. Tips for installation

• Install the detector indoors in spaces with normal air humidity. Do not install outdoors.
• DG-1 TCM and DG-1 LPG detectors should be installed low, near the floor.
• DG-1 ME detectors should be installed high, near the ceiling.
• DG-1 CO detectors should be installed at approximately 1.5 meters height.
• Avoid installing the detector in areas where lacquers, glues, paint removers, or aerosols are used, as this can negatively affect sensor operation.
• Installation in spaces with working industrial equipment is not recommended.

5. Installation

Caution: Disconnect power before making any electrical connections.

1. Turn the enclosure cover clockwise and remove it (See Figure 2).
2. Drill holes for screws and the cable in the enclosure base (See Figure 3).
3. Position the enclosure base against the wall and mark mounting hole locations.
4. Drill holes for wall plugs. Use provided plugs for concrete/brick; select appropriate plugs for other surfaces (e.g., drywall).
5. Feed the cable through the enclosure base hole.
6. Secure the enclosure base to the wall using screws.
7. Connect wires to the corresponding terminals.
8. Remove the jumper from the BUZ ON/OFF pins to disable acoustic signaling if desired.
9. Replace the detector cover, aligning marks on the cover and base, then turn counter-clockwise (See Figure 4).
10. Power up the detector. Start-up is indicated by three LED flashes and three short beeps.

Caution: Do not test the detector using improvised methods, such as lighter gas. During operation, the gas sensor heats up. The DG-1 TCM detector stabilizes for the first five minutes after power-up and may indicate an alarm during this period.

6. Specifications

• Supply voltage: 12 VDC (±15%)
• Standby current consumption:
  DG-1 CO: 7 mA
  DG-1 LPG: 35 mA
  DG-1 ME: 35 mA
  DG-1 TCM: 85 mA
• Maximum current consumption:
  DG-1 CO: 16 mA
  DG-1 LPG: 45 mA
  DG-1 ME: 45 mA
  DG-1 TCM: 105 mA
• Outputs:
  Alarm (NC relay, resistive load): 40 mA / 16 VDC
  Tamper (NC): 100 mA / 30 VDC
• Relay contact resistance (alarm output): 26 Ω
• Gas sensor life: 5 years (on average)
• Operating temperature range: -10 to +55 °C
• Dimensions: ø 97 x 36 mm
• Weight:
  DG-1 CO: 63 g
  DG-1 LPG: 62 g
  DG-1 ME: 63 g
  DG-1 TCM: 64 g