Infrared sensors need to stabilize and perform zero-point calibration in clean air
Selection and Usage Recommendations: Selection: Prioritize instruments using infrared principle (NDIR), which are maintenance-free and stable. If budget allows, choose models with Bluetooth/WIFI transmission and GPS positioning to facilitate establishing equipment leak archives. Calibration: Quantitative instruments must be regularly calibrated (usually annually) using standard SF6 gas, otherwise readings have no legal validity. Operation Procedure: Power on and preheat (infrared sensors need to stabilize). Perform "zero-point calibration" in clean air. First conduct a quick scan to locate suspected leak points. For suspected points, perform "wrapping method" quantitative measurement. Record data and calculate annual leak rate. Are you planning to purchase such equipment, or are you facing a specific SF6 leak exceeding standards that needs cause analysis? If the latter, I can provide common leak point troubleshooting sequence (such as seal ring aging, flange surface scratches, weld pinholes, etc.). Two Modes of Quantitative Measurement: In practical work, quantitative leak detectors have two working modes: Local Wrapping Method (Accumulation Method): Operation: Use plastic film to tightly wrap suspicious parts such as flanges and welds of equipment, and let it sit for a period (e.g., 4-24 hours). Measurement: Use a leak detector to extract gas from the wrapping and measure concentration. Calculation: Based on wrapping volume, settling time, and concentration increase, calculate the absolute leakage rate of that part (
