Working Principle of VOC Online Monitoring Equipment
The VOC online monitoring equipment uses a sensor based on the PID (Photoionization Detector) technology principle. It mainly obtains the concentration of VOC gases by ionizing them. When VOC gases enter the gas chamber of the detector, the built - in UV lamp of the PID sensor ionizes the VOC gases. The actual concentration of the gas is reflected by the amount of ions after ionization, and the digital signal conversion is carried out in the instrument, allowing us to intuitively understand the concentration of the detected VOC gases.
Usage method of the VOC online monitoring equipment
1. Turn on the power in a fresh - air environment and check the battery level to ensure it meets the specified requirements.
2. Zero adjustment (or check): Adjust the pointer to zero or check that the reading is zero in clean air.
3. Conduct on - site measurement and read data. When the detector is in operation, wait until the pointer and the reading are stable before recording the detection data.
4. Move the portable VOC online monitoring equipment to a fresh - air environment. Turn off the power after the indicator shows .
Maintenance method of the VOC online monitoring equipment
(1) The service life of the detection element and the compensation element is usually 3 - 5 years. Their service life can be extended under proper usage conditions and good maintenance.
(2) For the alarm with a test button, press the test button once a week to check if the alarm system is working properly. Check the zero point and range of the alarm every two months.
(3) Regularly check if the detection instrument has accidentally taken in water. Remove and clean the detector's ventilation cover during instrument inspection to prevent blockage.
(4) The detector is an explosion - proof device of the flame - proof type. Do not use it beyond the specified range. Do not use the detector in sulfur - containing environments. Try to use the detector when the concentration of combustible gases is below the lower explosive limit; otherwise, the elements may be burned out.
(5) Do not use the detector in an oxygen - deficient environment. Also, avoid directing a large amount of combustible gas directly at the probe.
