1、最新温标纯水密度表在密度计量测试中,纯水密度是最重要的密度标准参考物质,可称为“第一参考物质”。其数据对密度基准和标准的研究、精密测试以及在容量、质量、流量、压力、声学与海洋计量等方面都起着基值的作用。迄今国际间对于纯水密度的研究已有 200 多年的历史,主要是研究水密度的绝对测量,即通过确定了标准体(通常为球体)的体积与质量参数的一种间接测量,准确度较高,不确定度可110 -6;另外就是研究它的热膨胀,即密度与温度的关系,温度的范围主要在 040之间。众所周知,密度与温度参量关系密切,无疑温标的改变将直接影响到水密度的数据。1990 年国际温标(ITS90)已于 1989 年由第 77 届国
2、际计量委员会议(CIPM)通过,国家质量技术监督局也于 1990 年发布关于在我国统一实行“1990 年国际温标”的通知,并决定从 1994 年起在全国实施新温标。为使计量、测试结果准确可靠、技术先进,现推荐采用国际温标(ITS90)的纯水密度表来替代 1968 年国际实用温标(IPTS68)的纯水密度表是有实用价值的。新表温度范围为 0100,其中 040为常用范围,温度间隔为 0.1,很多工作不用内插计算,方便实用;40100的温度间隔为 1,是为了更广泛使用而编制的。下面给出 1990 国际温标水密度表表 1990 年国际温标纯水密表(kg/m 3)t90() 0.0 0.1 0.2 0
3、.3 0.4 0.5 0.6 0.7 0.8 0.90 999.840 999.846 999.853 999.859 999.865 999.871 999.877 999.883 999.888 999.8931 999.898 999.904 999.908 999.913 999.917 999.921 999.925 999.929 999.933 999.9372 999.940 999.943 999.946 999.949 999.952 999.954 999.956 999.959 999.961 999.9623 999.964 999.966 999.967 999.9
4、68 999.969 999.970 999.971 999.971 999.972 999.9724 999.972 999.972 999.972 999.971 999.971 999.970 999.969 999.968 999.967 999.9655 999.964 999.962 999.960 999.958 999.956 999.954 999.951 999.949 999.946 999.9436 999.940 999.937 999.934 999.930 999.926 999.923 999.919 999.915 999.910 999.9067 999.9
5、01 999.897 999.892 999.887 999.882 999.877 999.871 999.866 999.880 999.8548 999.848 999.842 999.836 999.829 999.823 999.816 999.809 999.802 999.795 999.7889 999.78 999.77 999.76 999.75 999.75 999.74 999.73 999.72 999.71 999.701 3 5 8 0 2 4 5 7 810 999.699 999.691 999.682 999.672 999.663 999.654 999.
6、644 999.634 999.625 999.61511 999.605 999.595 999.584 999.574 999.563 999.553 999.542 999.531 999.520 999.50812 999.497 999.486 999.474 999.462 999.450 999.439 999.426 999.414 999.402 999.38913 999.377 999.384 999.351 999.338 999.325 999.312 999.299 999.285 999.271 999.25814 999.244 999.230 999.216
7、999.202 999.187 999.173 999.158 999.144 999.129 999.11415 999.099 999.084 999.069 999.053 999.038 999.022 999.006 998.991 998.975 998.95916 998.943 998.926 998.910 998.893 998.876 998.860 998.843 998.826 998.809 998.79217 998.774 998.757 998.739 998.722 998.704 998.686 998.668 998.650 998.632 998.61
8、318 998.595 998.576 998.557 998.539 998.520 998.501 998.482 998.463 998.443 998.42419 998.404 998.385 998.365 998.345 998.325 998.305 998.285 998.265 998.244 998.22420 998.203 998.182 998.162 998.141 998.120 998.099 998.077 998.056 998.035 998.01321 997.991 997.970 997.948 997.926 997.904 997.882 99
9、7.859 997.837 997.815 997.79222 997.769 997.747 997.724 997.701 997.678 997.655 997.631 997.608 997.584 997.56123 997.537 997.513 997.490 997.466 997.442 997.417 997.393 997.396 997.344 997.32024 997.295 997.270 997.246 997.221 997.195 997.170 997.145 997.120 997.094 997.06925 997.043 997.018 996.99
10、2 996.966 996.940 996.914 996.888 996.861 996.835 996.80926 996.782 996.755 996.729 996.702 996.675 996.648 996.621 996.594 996.566 996.53927 996.511 996.484 996.456 996.428 996.401 996.373 996.344 996.316 996.288 996.26028 996.231 996.203 996.174 996.146 996.117 996.088 996.059 996.030 996.001 996.
11、97229 995.943 995.913 995.884 995.854 995.825 995.795 995.765 995.753 995.705 995.67530 995.645 995.615 995.584 995.554 995.523 995.493 995.462 995.431 995.401 995.37031 995.339 995.307 995.276 995.245 995.214 995.182 995.151 995.119 995.087 995.05532 995.024 994.992 994.960 994.927 994.895 994.863
12、994.831 994.798 994.766 994.73333 994.700 994.667 994.635 994.602 994.569 994.535 994.502 994.469 994.436 994.40234 994.369 994.335 994.301 994.267 994.234 994.200 994.166 994.132 994.098 994.06335 994.029 993.994 993.960 993.925 993.891 993.856 993.821 993.786 993.751 993.71636 993.681 993.646 993.
13、610 993.575 993.540 993.504 993.469 993.433 993.397 993.36137 993.325 993.280 993.253 993.217 993.181 993.144 993.108 993.072 993.035 992.99938 992.962 992.925 992.888 992.851 992.814 992.777 992.740 992.703 992.665 992.62839 992.591 992.553 992.516 992.478 992.440 992.402 992.364 992.326 992.288 99
14、2.25040 992.212t90() 0 1 2 3 4 5 6 7 8 940 992.212 991.826 991.432 991.031 990.623 990.208 989.786 987.358 988.922 988.47950 988.030 987.575 987.113 986.644 986.169 985.688 985.201 984.707 984.208 983.70260 983.191 982.673 982.150 981.621 981.086 980.546 979.999 979.448 978.890 978.32770 977.759 977.185 976.606 976.022 975.432 974.837 974.237 973.632 973.021 972.40580 971.785 971.159 970.528 969.892 969.252 968.606 967.955 967.300 966.639 965.97490 965.304 964.630 963.950 963.266 962.577 961.883 961.185 960.482 959.774 959.062100 958.345