Oxygen pressure gauges can be identical to ordinary pressure gauges in terms of structure and material, except that oxygen pressure gauges must be oil free. Because oil entering the oxygen system can easily cause an explosion. When calibrating the oxygen pressure gauge used, it is not allowed to use oil as the working medium, as is the case with ordinary pressure gauges, and the oxygen pressure gauge should be strictly protected from contact with oil contamination during storage. If it is necessary to measure the oxygen pressure using an existing pressure gauge with oil stains, it must be repeatedly cleaned with carbon tetrachloride before use, and carefully checked until there is no oil stains.

The instrument must be vertical: During installation, a 17mm wrench should be used to tighten it, and the case should not be forcibly twisted; Avoid collision during transportation; The instrument should be used at an ambient temperature of - 25~55 ℃; The vibration frequency of the working environment is<25HZ, and the amplitude is not greater than 1mm; Due to excessive ambient temperature during use, if the indicated value of the instrument does not return to the zero position or the indicated value exceeds the tolerance, the sealing rubber plug on the upper part of the case can be cut open to allow the inner chamber of the instrument to communicate with the atmosphere;