Preheating Mode The detector will access to the 180s' countdown preheating mode after powering on. POWER green indicator will steady on. Do not perform any other operations on the device during the warm-up time, because the alarm will have no response (The purpose of preheating is to adapt the gas alarm to the temperature and humidity in the installation environment).
Alarm Mode The values 1000-9999 and HHHH will displayed on the screen according to the different concentrations of gas leak. When a flammable gas leak is detected, the alarm will present different alarm status. (Please note: the values shown on the screen are in PPM and 1%LEL=500PPM). The following X represents the flammable gas leak value: (1) When the X < 1000, the screen does not display numbers, and the alarm does not sound. (2) When 1000 ? X < 2500, the corresponding numbers will be displayed, the alarm does not sound. Its a early warning of gas leakage. (3) When 2500 ? X ? 9999, the corresponding numbers will be displayed, the Red ALARM indicator and the top red strobe lights keep flashing, the device sound a hasty and lound alarm. (4) When the gas leak concentration exceeds 9999 range, the HHHH will be displayed. the Red ALARM indicator and the top red strobe lights keep flashing, and sound a hasty and lound alarm. The alarm won't stop till the combustible gas concentration below the threshold.
