Gilson pipetman - Page 30

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APPENDIX 2  Z FACTOR
The reference calculation equation is :
 Where: P
A
=densityofairatt°C.
P
W
=densityofthetestliquidatt°C.
P
B
=densityofthebalanceweights.Use8g/ccforP
B
 Weights conforming to International Recommendation N°33 of
OIML have been adjusted to give results when weighing in air as if the
density of the weights were 8.0 g/mL.
Valuesoftheconversionfactor
Z (µL/mg) as a function of
temperature and pressure for
distilled water.
Temperature Air pressure (hPa)
(°C) 800 853 907 960 1013 1067
15 1.0018 1.0018 1.0019 1.0019 1.0020 1.0020
15.5 1.0018 1.0019 1.0019 1.0020 1.0020 1.0021
16 1.0019 1.0020 1.0020 1.0021 1.0021 1.0022
16.5 1.0020 1.0020 1.0021 1.0022 1.0022 1.0023
17 1.0021 1.0021 1.0022 1.0022 1.0023 1.0023
17.5 1.0022 1.0022 1.0023 1.0023 1.0024 1.0024
18 1.0022 1.0023 1.0024 1.0024 1.0025 1.0025
18.5 1.0023 1.0024 1.0025 1.0025 1.0026 1.0026
19 1.0024 1.0025 1.0025 1.0026 1.0027 1.0027
19.5 1.0025 1.0026 1.0026 1.0027 1.0028 1.0028
20 1.0026 1.0027 1.0027 1.0028 1.0029 1.0029
20.5 1.0027 1.0028 1.0028 1.0029 1.0030 1.0030
21 1.0028 1.0029 1.0030 1.0030 1.0031 1.0031
21.5 1.0030 1.0030 1.0031 1.0031 1.0032 1.0032
22 1.0031 1.0031 1.0032 1.0032 1.0033 1.0033
22.5 1.0032 1.0032 1.0033 1.0033 1.0034 1.0035
23 1.0033 1.0033 1.0034 1.0035 1.0035 1.0036
23.5 1.0034 1.0035 1.0035 1.0036 1.0036 1.0037
24 1.0035 1.0036 1.0036 1.0037 1.0038 1.0038
24.5 1.0037 1.0037 1.0038 1.0038 1.0039 1.0039
25 1.0038 1.0038 1.0039 1.0039 1.0040 1.0041
25.5 1.0039 1.0040 1.0040 1.0041 1.0041 1.0042
26 1.0040 1.0041 1.0042 1.0042 1.0043 1.0043
26.5 1.0042 1.0042 1.0043 1.0043 1.0044 1.0045
27 1.0043 1.0044 1.0044 1.0045 1.0045 1.0046
27.5 1.0044 1.0045 1.0046 1.0046 1.0047 1.0047
28 1.0046 1.0046 1.0047 1.0048 1.0048 1.0049
28.5 1.0047 1.0048 1.0048 1.0049 1.0050 1.0050
29 1.0049 1.0049 1.0050 1.0050 1.0051 1.0052
29.5 1.0050 1.0051 1.0051 1.0052 1.0052 1.0053
30 1.0052 1.0052 1.0053 1.0053 1.0054 1.0055
Z = [1/(P
W
-P
A
)] [1-(P
A
/P
B
)]