HK2000 Series
Combustible Gas Alarm Controller
Installation and Operation Manual
1. Product Overview
The HK2000 Combustible Gas Alarm Controller is designed for industrial environments. It works with our 4-20mA current-output gas detectors to form a gas alarm control system. When combustible gas or liquid vapors are detected in the monitored area, the detector transmits a 4-20mA current signal proportional to the gas concentration to the controller. The controller processes the signal, displays the gas concentration, and triggers audible/visual alarms and control signals if the concentration exceeds preset thresholds (low/high limits). This enables graded control to prevent accidents.
The HK2000 controller includes 3 relays for low-limit alarms, high-limit alarms, and faults.
Key Features
- High-brightness LED display for real-time gas concentration monitoring and menu interaction.
- Compliant with Chinese National Standard GB16808-2008 for combustible gas alarm controllers.
Technical Specifications
| Parameter | Description |
|---|---|
| Compliance | GB16808-2008 |
| Main Power | 220V AC, 50Hz |
| Backup Power | 2×12V DC 1.3Ah lead-acid batteries |
| Power Consumption | ≤2W |
| Detector Interface | 4-20mA |
| System Capacity | 1 detector per loop |
| Display | High-brightness LED |
| Status Indicators | LED indicators |
| Alarm Levels | Low-limit (1st level), High-limit (2nd level) |
| Audible Alerts | Fault tone, Alarm tone |
| Event Logging | 1,000 alarm records, 200 fault records |
| Relay Outputs | 3 relays |
| Relay Rating | 3A @ 24V DC / 3A @ 250V AC |
| Communication | RS485 (Modbus RTU protocol) |
| Mounting | Wall-mounted |
| Operating Temperature | 0°C to 40°C |
| Operating Humidity | ≤95% RH (non-condensing) |
2. Installation and Wiring
2.1 Mounting
The HK2000 controller is wall-mounted. Drill two 10mm-diameter holes (depth: 40mm) at marked positions on the enclosure. Secure the unit to the wall using M6 expansion bolts.
2.2 Dimensions
(Note: Include dimensional drawings here if available.)
2.3 System Configuration
The HK2000 controller connects to detectors as shown in the system diagram.
2.4 Terminal Definitions
| Terminal | Description | Terminal | Description |
|---|---|---|---|
| L | Live wire | N | Neutral wire |
| PE | Ground wire | PE | Ground wire |
| BAT+ | Backup power (+) | BAT+ | Backup power (+) |
| BAT- | Backup power (-) | BAT- | Backup power (-) |
| A | RS485 (+) | A | RS485 (+) |
| B | RS485 (-) | B | RS485 (-) |
| lout | 4-20mA output | lin | 4-20mA input |
| LR+ | Low-limit relay (+) | DT+ | Detector power (+) |
| LR- | Low-limit relay (-) | DT- | Detector power (-) |
| HR+ | High-limit relay (+) | FR+ | Fault relay (+) |
| HR- | High-limit relay (-) | FR- | Fault relay (-) |
3. Operation Guide
3.1 Display and Indicators
LED Indicators
- Alarm: Lights when any detector triggers an alarm.
- Fault: Lights when a detector or system fault occurs.
- Main Power: Active during AC220V operation.
- Backup Power: Active during battery operation.
- Mute: Lights when alarms/faults are silenced.
Keypad Functions
- Confirm: Accept inputs.
- Exit: Return to previous menu.
- Reset: Clear faults/alarms and restore defaults.
- Self-Test: Test audible/visual alerts.
- Query: Access event logs.
- Settings: Enter configuration menu (password required).
- Mute: Silence alarms/faults (new alarms reactivate sound).
- Arrow Keys: Navigate menus.
3.2 Operational States
Normal Monitoring
LED displays real-time gas concentration.
Alarm States
- Low-Limit Alarm: Gas concentration ≥ low threshold. Triggers audible/visual alerts and closes low-limit relay.
- High-Limit Alarm: Gas concentration ≥ high threshold. Triggers louder alarms and closes high-limit relay.
Fault State
Detector/system faults trigger fault indicators, audible alerts, and close the fault relay. Alarms auto-clear when faults resolve.
Note:
- Press Mute to silence alarms temporarily.
- Press Reset to clear alarms after gas concentration drops below thresholds.
3.3 System Menu
Access Levels
- Normal Access: View logs and mute alarms (no password).
- Level 1 Access: Reset or self-test (default password: Left/Left/Left/Left for reset; Right/Right/Right/Right for self-test).
- Level 2 Access: Configure parameters (default password: Up/Down/Left/Right).
Configuration Menu
| Parameter | Description | Access Level | Notes |
|---|---|---|---|
| rtc | Real-time clock | Level 2 | |
| rANG | Detector gas range | Level 2 | |
| A1 | Low-limit threshold | Level 2 | |
| A2 | High-limit threshold | Level 2 | |
| Addr | RS485 address | Level 2 | |
| nodE | RS485 mode | Level 2 | 0=CRT, 1=Modbus RTU |
| bAt | Backup power enable | Level 2 | 0=Disable, 1=Enable |
| CALI | Calibrate 4-20mA input | Level 2 | |
| CALO | Calibrate 4-20mA output | Level 2 |
4. Packaging, Transport, and Storage
- Packaged in foam-lined cartons.
- Suitable for rail, road, or air transport. Avoid impacts to the top surface.
5. Safety Guidelines
- Do not modify internal components. Unauthorized adjustments may void warranties.
- Ensure proper grounding for lightning protection and EMC compliance.
- Secure all cables with waterproof connectors.
- Keep enclosure door locked during operation.
Shanghai Huikong Electronic Technology Co., Ltd.
Address: 2nd Floor, Building 27, No.58, Lane 7224, Hunnan Highway, Pudong New District, Shanghai
Tel: +86-21-68901087
Fax: +86-21-33275717
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