Specifications for gas alarm calibration devices? ?
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What are the specifications for a gas alarm calibration device? I used it but have forgotten – it’s a 4L cylinder； Standard gas* 4L ； Special silicone tube 1.5M ； Calibration cover: 1 piece ； Reducer: 1 ； 1 constant current valve – what is the flow rate? ? ?
Both the silicone tubes and calibration covers are supplied by the manufacturer; there is no unified standard for calibration covers, and those from different manufacturers vary. We need to prepare standard gas cylinders ourselves, with the flow rate generally set at 300 ml/min
The last edit to this post was made by Meisan Manufacturer Direct Sale on 2016-7-5 at 22:23. First of all, each manufacturer has its own requirements regarding flow rate, and it’s possible that different models of instruments may have varying flow rate requirements, even if they are produced by the same manufacturer. A calibration device generally includes: a calibration gas, a pressure reducing valve (including a flow control valve), a remote control or magnetic rod, hoses, and a calibration cap; these components are usually sufficient. If it’s not clear what the flow rate should be, it is recommended to use a flow rate of 0.5 L/min! It should also be noted that the requirements for hoses used with flammable gases are not very high, but the requirements for hoses used with toxic gases are relatively higher, as some special toxic gases have adsorptive properties. As for the length of the hoses, in principle, the shorter, the better; it depends on the specific conditions at the site