最近引进的旁路粘度计被评估为测量制冷系统液体管线中油浓度的传感器。在模拟液体管线条件下，使用浓度为0至30重量%的R-12/环烷油、R-22/环烷油和R-502/烷基苯油混合物对粘度计进行测试。所有使用的机油都属于150 SUS粘度等级。模拟液体管线中的试验温度范围为70至120华氏度（21.1至46.1摄氏度），压力对应于约3华氏度（1.7摄氏度）的过冷。数据的统计分析表明，粘度计可用于测量R-12/环烷油混合物中的流动油浓度，在所有试验条件下的不确定度为±1重量百分比或更小。对于R-22/环烷油和R-502/烷基苯油混合物，当油浓度低于约10重量%时，在较高的试验温度下，测量不确定度增加到±2重量%- 百分比。单位:双引文:阿什雷交易，1988年，第94卷，第。2、渥太华

A recently introduced bypass viscometer was evaluated as a sensor for measuring the concentration of oil in the liquid line of a refrigeration system. The viscometer was tested under simulated liquid-line conditions with R-12/naphthenic oil, R-22/naphthenic oil, and R-502/alkylbenzene oil mixtures in concentrations of 0 to 30 weight-percent. All of the oils used were of the 150 SUS viscosity classification. Test temperatures in the simulated liquid line ranged from 70 to 120 F (21.1 to 46.1°C) at pressures corresponding to approximately 3 F (1.7°C) subcooling. Statistical analysis of the data showed that the viscometer can be used measure the flowing oil concentration in R-12/naphthenic oil mixtures with an uncertainty of ±1 weight-percent or less for all of the test conditions. For the R-22/naphthenic oil and R-502/alkylbenzene oil mixtures, the measurement uncertainty increased to ±2 weight-percent at the higher test temperatures for oil concentrations below approximately 10 weight-percent.Units: Dual