GT-HK101 Point-Type Combustible Gas Detector Installation and Operation Manual
1. Precautions
- Read and understand this manual thoroughly before installation, commissioning, or operation.
- Never open the detector’s cover while powered on in environments with combustible gases/vapors. Use a portable gas detector to verify safety. Perform regular calibration and maintenance.
- Regularly inspect and clean the detector’s air inlet to prevent blockages that may cause inaccuracies.
- Do not test the detector with pure gases or high-concentration gases, as this may cause sensor carbon deposition, inaccuracies, reduced lifespan, or permanent damage.
- Ensure proper grounding to prevent RF interference. Use the designated grounding point. Handle sensors with care due to potential corrosive solutions inside.
- Avoid exposing sensors to temperatures beyond specified ranges or immersing them in organic solvents/flammable liquids.
- Use explosion-proof certified cable glands matching the detector’s protection class (ExdII CT6).
2. Product Overview
- Features a rugged explosion-proof aluminum housing with two M20×1.5 ports. Designed for industrial/commercial gas detection and alarm systems.
- Uses LBUS 4-wire communication for real-time data transmission (concentration, faults, alarms). Includes relay outputs and built-in audible/visual alarms.
- Equipped with imported high-precision catalytic combustion sensor with intelligent high-concentration protection.
- Modular sensor unit allows field replacement without recalibration.
3. Compliance Standards
- GB15322.1-2019: Combustible Gas Detectors Part 1: Point-Type Detectors for Industrial and Commercial Use
- GB3836.1-2010: Explosive Atmospheres – Part 1: General Requirements
- GB3836.2-2010: Explosive Atmospheres – Part 2: Flameproof Enclosure “d”
4. Technical Specifications
| Parameter | Specification |
|---|---|
| Detection Principle | Catalytic combustion |
| Measured Gas | Methane |
| Range | 3–100% LEL |
| Accuracy | ±3% LEL |
| Response Time (T90) | ≤30 seconds |
| Sampling Method | Diffusion |
| Operating Voltage | DC24V±6V |
| Communication Protocol | LBUS 4-wire |
| Explosion Protection | ExdII CT6 |
| IP Rating | IP66 |
| Sensor Life | 3 years (typical) |
| Alarm Thresholds | Low: 25% LEL (factory default) |
| High: 50% LEL (factory default) | |
| Dimensions | 180×140×83 mm |
| Weight | 1.2 kg |
5. Wiring Instructions
Terminals:
- V1/V2: 24VDC power input (non-polarized)
- L1/L2: LBUS communication lines (non-polarized)
- SG+/SG-: Audible/visual alarm output (24V@200mA max)
- COM/NC/NO: Relay contacts (COM=common, NC=normally closed, NO=normally open)
Note:
- Ensure proper grounding of the housing.
- Use shielded cables (4×1.5mm²) with max 1500m length.
6. Operation Modes
6.1 Power-On
- Green power LED illuminates.
- Digital display shows address → enters 3-minute warmup countdown.
6.2 Monitoring Mode
- Displays real-time gas concentration after warmup.
6.3 Alarm Mode
- Red LEDs activate at low/high thresholds. Relays trigger and alarms sound.
6.4 Fault Mode
- Yellow fault LED illuminates. Error codes:
- E1: Sensor communication error
- E2: Sensor failure
- E3: Over-range error (requires reset via infrared remote after gas clearance)
7. Configuration (Infrared Remote: HKRC-1)
Password: 8888
Menu Options:
- Zero Calibration: Perform in clean air (10+ minutes).
- Span Calibration: Apply 50% LEL standard gas (500ml/min flow).
- Alarm Threshold Adjustment: Modify low/high limits (default: 25%/50% LEL).
- Address Setting: Assign unique LBUS address (1–255).
- Relay Function Configuration
- Analog Value Monitoring (debugging only)
8. Maintenance
- Annual calibration (semi-annual for harsh environments).
- Keep sensor unobstructed; avoid direct gas exposure/contaminants.
- Protect from moisture, corrosion, and physical impacts.
- Contact supplier if environmental conditions change significantly.
9. Troubleshooting
| Fault | Cause | Solution |
|---|---|---|
| E1 | Loose sensor connection | Reinsert sensor module |
| E2 | Sensor failure/disconnection | Replace sensor |
| E3 | Calibration error | Recalibrate |
| No communication | Power/address/wiring issues | Check voltage, wiring, address settings |
10. Warranty
Two-year free repair/replacement for manufacturing defects. Exclusions:
- Damage from misuse, improper installation, or unauthorized modification
- Transportation-related damage
- Acts of nature
Shanghai Huikong Electronics Technology Co., Ltd
Address: 3F, Bldg 20 & 2F, Bldg 27, No.58, Lane 7224, Hunan Highway, Xinchang Town, Pudong, Shanghai
Tel: +86-21-68901087 Fax: +86-21-33275717
Website: http://www.shhkdz.com
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