| Technical parameters | |
| 1.1 Adjustable gas humidity | Adjustment range: 0% – 100% |
| Control accuracy: ±10% (F.S.) | |
| The stabilisation time required to adjust the humidity to the target humidity is not more than 3min. | |
| 1.2 Gas concentration control | Control accuracy: ±0.1% (S.P.) |
| Gas supply for each product averages 300sccm | |
| 1.3 Product power supply section (constant voltage & constant current) | Voltage controllable range: DC 2.2V – 5V |
| Current controllable range: single channel 0mA-300mA | |
| Power supply accuracy: ±1mV | |
| Accuracy of supply current: ±0.1mA | |
| 1.4 Voltage signal acquisition | Signal channel: 72 |
| Acquisition accuracy: ±0.1mV | |
| Sampling frequency: ≥2Hz | |
| 1.5 Current Signal Acquisition | Signal channels: 72 |
| Acquisition accuracy: ±0.1mA | |
| Sampling frequency: ≥2Hz | |
| 1.6 Honeywell HSE Requirements (alterations to comply with HSE requirements) | Noise <70dB |
| Gas vented to exhaust vent | |
| With explosion-proof alarm measures | |
| Programming Alarms | |
| Interface reminders and audible and visual alarms for potentially hazardous settings | |
LEL Sensor Test System
Description:
The test system was designed to verify the performance of the LEL combustible gas sensor. The LEL flammable gas sensor is placed in a test chamber filled with a flammable gas mixture (methane and air mixture) and the quality of the sensor is evaluated by varying the concentration, humidity, and temperature of the gas to test the sensor’s performance under different environmental conditions. The main system requirements are divided into two aspects: hardware design requirements and software design requirements.
