3.7 Safe LED

The instrument is equipped with a green "SAFE LED". This green SAFE LED flashes every 15 seconds under the following conditions:

• the SAFE LED feature is enabled
• instrument is in Measurement mode (Normal Operation)
• combustible reading is 0% LEL or 0.00% CH4
• Oxygen (O2) reading is 20.8%
• Carbon Monoxide (CO) reading is 0 ppm or 0 mg/m3
• Hydrogen Sulfide (H2S) reading is 0 ppm or 0 mg/m³
• no gas alarms are present (low or high)
• instrument is not in Low Battery warning or alarm
• CO, H2S, STEL and TWA readings are 0 ppm or 0 mg/m³.