Multi Gas Detector Operating Procedures This procedure specifies the testing of the gas in the tank before the start of the equipment, the preparation of the Multi Gas Detector, the testing procedures and safety precautions. This procedure is applicable to gas detection operations before cleaning of various types of oil storage tanks by mechanical cleaning projects. Normative reference document flammable gas detection alarm use specification Multi Gas Detector inspection preparation before inspection to check whether the battery is sufficient (3.3V or more), not enough timely charging; check the air inlet filter for debris, block the need Clean up or replace;

Operation steps: Start the operation: press [MODE] and hold for 1 second, the LCD displays “on”, the LED is on, the buzzer sounds, the instrument is turned on; the version number is displayed, and the preheating and self-test are performed at the same time. After the preheating and self-test completion, the 10-second countdown ends and the instrument enters the detection mode to confirm that the instrument is operating normally. Confirm that fresh air is being pumped and confirm that the indicator value of the oxygen indicator is indeed 20.9%. Insert the end of the sampling tube into the test point. After the test value changes stably, read and record. Take out the sampling tube from the test point and place it in the air. After the LED display value returns to the air state, proceed to the next test point test.

Shutdown operation: Press and hold the button, the LCD will display a 5 second countdown. After the countdown is over, the LCD will display “off”, then the instrument will not display and the instrument will shut down.