Determinations of Recognised-value Standards of Measurement
Recognised-value Standard of Acceleration
Due to Gravity in a Vacuum
Under the National Measurement Act 1960 the
National Standards Commission (from 1 July
2004 known as the National Measurement
Institute) made the following determinations
of recognised-value standards of measurement:
 accuracy of a reference standard of
measurement (dated 24 May 2002)
 acceleration due to gravity in a vacuum
(dated 21 March 1985)
 acceleration due to gravity (National
Measurement Laboratory, now known as
the National Measurement Institute) (dated
21 March 1985)
 density of mercury (dated 21 March 1985)
 density of water (dated 21 March 1985)
 density of standard mean ocean water
(dated 21 March 1985)
 dynamic viscosity of water at a temperature
of 20°C (dated 21 March 1985)
 dynamic viscosity of water at a temperature
in the range 19.98°C to 20.02°C
(dated 21 March 1985)
 velocity of electromagnetic waves in a
vacuum (dated 21 March 1985)
 of position of the Australian fiducial
network locations (dated 20 March 2012)
In pursuance of paragraph 8A(1)(a) and (b) of
the National Measurement Act 1960, it was
determined that the acceleration in vacuum of
a body due to the gravitational attraction of the
earth at the locations specified in the
Report 207, entitled Australian Gravity
Network Adjustment 1975, of the Bureau of
Mineral Resources Geology and Geophysics,
shall be a recognised-value standard of
measurement, the magnitude of the
acceleration in m.s-2 being the value in
milligals specified for those locations in that
Report multiplied by 10-5.
For the purposes of this Determination the
chance is not more than one in one hundred
that the magnitude of the acceleration so
ascertained differs from the true magnitude by
more than 0.000 0l m.s-2.
Recognised-value Standard of
Acceleration Due to Gravity (National
Measurement Laboratory, now known as
the National Measurement Institute)
In pursuance of paragraph 8A(1) (a) of the
National Measurement Act 1960, it was
determined that the magnitude of the
acceleration in vacuum of a body due to the
gravitational attraction of the earth as
designated in the Schedule shall be a
recognised-value standard of measurement.
Recognised-value Standard of Accuracy of
a Reference Standard of Measurement
The accuracy of reference standards of
measurement shall be ascertained in
accordance with the principles in the ISO
Guide to the Expression of Uncertainty in
Measurement (1995), with an interval
estimated to have a confidence level of 95% at
the time of verification.
The Schedule
Place: At any point on the floor of room B245
of the National Measurement
Laboratory (now known as the
National Measurement Institute),
Lindfield
Acceleration: 9.796 376.m.s-2
For the purposes of this Determination the
above value is exact.
01/2013
1
Determinations
Recognised-value Standard of the Density
of Mercury
Recognised-value Standard of the Density
of Water
In pursuance of paragraphs 8A(1)(a) and (b) of
the National Measurement Act 1960, it was
determined that the magnitude of the density
of mercury dt at a temperature t and a mean
pressure p shall be a recognised-value standard
of measurement, provided t lies within the
range 0°C to 40°C and p lies within the range
0 Pa to 107Pa.
In pursuance of paragraphs 8A(1)(a) and (b) of
the National Measurement Act 1960, it was
determined that the magnitude of the density
of water dt at a temperature t and a mean
pressure p shall be a recognised-value standard
of measurement, provided t lies within the
range 0°C to 40°C and p lies within the range
2  104 Pa to 106 Pa.
For the purposes of this Determination:
For the purposes of this Determination:
(a) When p is 101 325 Pa and t is one of the
temperatures listed in Table 1 then the
magnitude of the density in kg.m-3 is as
stated in the table, which is derived from
the following formula:
(a) When p is 101 325 Pa and t is one of the
temperatures listed in Table 2 the
magnitude of the density in kg.m-3 is as
stated in the table, which is derived from
the following formula:
dt = 13 595.08 / {1 + (18 150.36 t + 0.702 09 t2
+ 2.865 5  10-3t3 + 2.621  10-6 t4)  10-8}
dt = 999.972 – (t – 3.984 9)2 / 506.603 12
 (t + 286.460 1) / (t + 67.760 1)
where dt is the density in kg.m-3 and t is
the temperature in °C.
where dt is the density in kg.m-3 and t is
the temperature in °C.
(b) When p is 101 325 Pa and t is between
two adjacent values of temperature listed
in the attached table then the magnitude of
the density in kg.m-3 shall be determined
from the table by linear interpolation.
(b) When p is 101 325 Pa and t is between
two adjacent values of temperature listed
in the attached table then the magnitude of
the density in kg.m-3 shall be determined
from the table by linear interpolation.
(c) When p differs from 101 325 Pa the
magnitude of the density in kg.m-3 as
stated in the attached table or derived
therefrom in accordance with the above
linear interpolation shall be algebraically
increased by an amount equal to
5.47  10-7 (p – 101 325).
(c) When p differs from 101 325 Pa the
magnitude of the density in kg.m-3 as
stated in the attached table or derived
therefrom in accordance with the above
linear interpolation shall be algebraically
increased by an amount equal to
(5.061 9 – 0.030 9 t + 0.000 361 4 t2) 
10-7(p – 101 325).
(d) If the value of t used in the attached table
and the above equations does not differ
from the true mean temperature of the
mercury by more than 0.1°C, if the value
of p used in the equation does not differ
from the true mean pressure within the
mercury by more than 1 000 Pa, and if
impurities in the mercury do not exceed
5 part in 106 by mass, the chance is not
more than one in one hundred that the
density so ascertained differs from the true
density by more than 0.3 kg.m-3.
01/2013
(d) If the value of t used in the attached table
and the above equations does not differ
from the true mean temperature of the
water by more than 0.1°C, if the value of
p used in the equation does not differ from
the true mean pressure within the water by
more than 1 000 Pa, and if impurities in
the water do not exceed 1 part in 105 by
mass, the chance is not more than one in
one hundred that the density so
ascertained differs from the true density
by more than 0.05 kg.m-3.
2
Determinations
Table 1. The density of mercury in kilograms per cubic metre as a function of the temperature
in degrees Celsius
Temp Density
Temp Density Temp Density Temp Density
Temp Density
Temp Density Temp Density
Temp Density
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
13595.08
13594.83
13594.59
13594.34
13594.09
13593.85
13593.60
13593.35
13593.11
13592.86
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
13582.75
13582.50
13582.26
13582.01
13581.77
13581.52
13581.27
13581.03
13580.78
13580.53
10.0
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
13570.44
13570.19
13569.95
13569.70
13569.46
13569.21
13568.96
13568.72
13568.47
13568.22
15.0
15.1
15.2
15.3
15.4
15.5
15.6
15.7
15.8
15.9
13558.14
13557.90
13557.65
13557.41
13557.16
13556.92
13556.67
13556.42
13556.18
13555.93
20.0
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
13545.87
13545.62
13545.38
13545.13
13544.88
13544.64
13544.39
13544.15
13543.90
13543.66
25.0
25.1
25.2
25.3
25.4
25.5
25.6
25.7
25.8
25.9
13533.60
13533.36
13533.11
13532.87
13532.62
13532.38
13532.13
13531.89
13531.64
13531.40
30.0
30.1
30.2
30.3
30.4
30.5
30.6
30.7
30.8
30.9
13521.36
13521.11
13520.87
13520.62
13520.38
13520.13
13519.89
13519.65
13519.40
13519.16
35.0
35.1
35.2
35.3
35.4
35.5
35.6
35.7
35.8
35.9
13508.13
13508.88
13508.64
13508.39
13507.15
13507.91
13507.66
13507.42
13506.17
13506.93
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
13592.61
13592.37
13592.12
13591.87
13591.63
13591.38
13591.13
13590.89
13590.64
13590.39
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
13580.29
13580.04
13579.79
13579.55
13579.30
13579.06
13578.81
13578.56
13578.32
13578.07
11.0
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
13567.98
13567.73
13567.49
13567.24
13567.00
13566.75
13566.50
13566.26
13566.01
13565.77
16.0
16.1
16.2
16.3
16.4
16.5
16.6
16.7
16.8
16.9
13555.69
13555.44
13555.20
13554.95
13554.70
13554.46
13554.21
13553.97
13553.72
13553.48
21.0
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
13543.41
13543.17
13542.92
13542.68
13542.43
13542.19
13541.94
13541.70
13541.45
13541.20
26.0
26.1
26.2
26.3
26.4
26.5
26.6
26.7
26.8
26.9
13531.15
13530.91
13530.66
13530.42
13530.17
13529.93
13529.68
13529.44
13529.19
13528.95
31.0
31.1
31.2
31.3
31.4
31.5
31.6
31.7
31.8
31.9
13518.91
13518.67
13518.42
13518.18
13517.93
13517.69
13517.44
13517.20
13516.95
13516.71
36.0
36.1
36.2
36.3
36.4
36.5
36.6
36.7
36.8
36.9
13506.68
13506.44
13506.20
13505.95
13505.71
13505.46
13505.22
13504.97
13504.73
13504.48
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
13590.15
13589.90
13589.65
13589.41
13589.16
13588.91
13588.67
13588.42
13588.17
13587.93
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
13577.82
13577.58
13577.33
13577.09
13576.84
13576.59
13576.35
13576.10
13575.85
13575.61
12.0
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
13565.52
13565.27
13565.03
13564.78
13564.54
13564.29
13564.04
13563.80
13563.55
13563.31
17.0
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
17.9
13553.23
13552.99
13552.74
13552.49
13552.25
13552.00
13551.76
13551.51
13551.27
13551.02
22.0
22.1
22.2
22.3
22.4
22.5
22.6
22.7
22.8
22.9
13540.96
13540.71
13540.47
13540.22
13539.98
13539.73
13539.49
13539.24
13539.00
13538.75
27.0
27.1
27.2
27.3
27.4
27.5
27.6
27.7
27.8
27.9
13528.70
13528.46
13528.21
13527.97
13527.72
13527.48
13527.23
13526.99
13526.74
13526.50
32.0
32.1
32.2
32.3
32.4
32.5
32.6
32.7
32.8
32.9
13516.46
13516.22
13515.98
13515.73
13515.49
13515.24
13515.00
13514.75
13514.51
13514.26
37.0
37.1
37.2
37.3
37.4
37.5
37.6
37.7
37.8
37.9
13504.24
13504.00
13503.75
13503.51
13503.26
13503.02
13502.77
13502.53
13502.29
13502.04
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
13587.68
13587.43
13587.19
13586.94
13586.69
13586.45
13586.20
13585.95
13585.71
13585.46
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
13575.36
13575.12
13574.87
13574.62
13574.38
13574.13
13573.88
13573.64
13573.39
13573.15
13.0
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
13.9
13563.06
13562.81
13562.57
13562.32
13562.08
13561.83
13561.59
13561.34
13561.09
13560.85
18.0
18.1
18.2
18.3
18.4
18.5
18.6
18.7
18.8
18.9
13550.78
13550.53
13550.28
13550.04
13549.79
13549.55
13549.30
13549.06
13548.81
13548.57
23.0
23.1
23.2
23.3
23.4
23.5
23.6
23.7
23.8
23.9
13538.51
13538.26
13538.02
13537.77
13537.53
13537.28
13537.04
13536.79
13536.55
13536.30
28.0
28.1
28.2
28.3
28.4
28.5
28.6
28.7
28.8
28.9
13526.26
13526.01
13525.77
13525.52
13525.28
13525.03
13524.79
13524.54
13524.30
13524.05
33.0
33.1
33.2
33.3
33.4
33.5
33.6
33.7
33.8
33.9
13514.01
13513.77
13513.53
13513.28
13513.04
13512.80
13512.55
13512.31
13512.06
13511.82
38.0
38.1
38.2
38.3
38.4
38.5
38.6
38.7
38.8
38.9
13501.80
13501.55
13501.31
13501.06
13500.82
13500.58
13500.33
13500.09
13499.84
13499.60
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
13585.22
13584.97
13584.72
13584.48
13584.23
13583.98
13583.74
13583.49
13583.24
13583.00
9.0
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
13572.90
13572.65
13572.41
13572.16
13571.92
13571.67
13571.42
13571.18
13570.93
13570.69
14.0
14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
13560.60
13560.36
13560.11
13559.86
13559.62
13559.37
13559.13
13558.88
13558.64
13558.39
19.0
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
19.9
13548.32
13548.08
13547.83
13547.58
13547.34
13547.09
13546.85
13546.60
13546.36
13546.11
24.0
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.9
13536.06
13535.81
13535.57
13535.32
13535.08
13534.83
13534.58
13534.34
13534.09
13533.85
29.0
29.1
29.2
29.3
29.4
29.5
29.6
29.7
29.8
29.9
13523.81
13523.56
13523.32
13523.07
13522.83
13522.58
13522.34
13522.09
13521.85
13521.60
34.0
34.1
34.2
34.3
34.4
34.5
34.6
34.7
34.8
34.9
13511.57
13511.33
13511.08
13510.84
13510.60
13510.35
13510.11
13509.86
13509.62
13509.37
39.0
39.1
39.2
39.3
39.4
39.5
39.6
39.7
39.8
39.9
13499.35
13499.11
13498.87
13498.62
13498.38
13498.13
13497.89
13497.65
13497.40
13497.16
5.0 13582.75 10.0 13570.44 15.0 1358.14
01/2013
20.0 13545.87 25.0 13533.60 30.0 13521.36 35.0 13509.13 40.0 13496.91
3
Determinations
Table 2. The density of water in kilograms per cubic metre as a function of the temperature
in degrees Celsius
Temp Density
Temp Density
Temp Density Temp Density
Temp Density
Temp Density
Temp Density
Temp Density
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.8
0.8
0.9
999.839
999.846
999.853
999.859
999.865
999.871
999.877
999.883
999.888
999.893
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
999.964
999.962
999.960
999.958
999.956
999.954
999.952
999.949
999.946
999.943
10.0
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
999.700
999.691
999.682
999.673
999.663
999.654
999.645
999.635
999.625
999.615
15.0
15.1
15.2
15.3
15.4
15.5
15.6
15.7
15.8
15.9
999.100
999.084
999.069
999.054
999.038
999.023
999.007
998.991
998.975
998.959
20.0
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
998.204
998.183
998.163
998.142
998.121
998.100
998.078
998.057
998.036
998.014
25.0
25.1
25.2
25.3
25.4
25.5
25.6
25.7
25.8
25.9
997.045
997.019
996.993
996.968
996.942
996.916
996.889
996.863
996.837
996.810
30.0
30.1
30.2
30.3
30.4
30.5
30.6
30.7
30.8
30.9
995.647
995.617
995.587
995.556
995.526
995.495
995.465
995.434
995.403
995.372
35.0
35.1
35.2
35.3
35.4
35.5
35.6
35.7
35.8
35.9
994.032
993.998
993.963
993.929
993.894
993.859
993.824
993.790
993.755
993.719
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
999.898
999.903
999.908
999.913
999.917
999.921
999.925
999.929
999.933
999.936
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
999.940
999.937
999.934
999.930
999.927
999.923
999.919
999.915
999.910
999.906
11.0
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
999.605
999.595
999.585
999.574
999.564
999.553
999.542
999.531
999.520
999.509
16.0
16.1
16.2
16.3
16.4
16.5
16.6
16.7
16.8
16.9
998.943
998.927
998.910
998.894
998.877
998.860
998.843
998.827
998.809
998.792
21.0
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
997.992
997.971
997.949
997.927
997.905
997.883
997.860
997.838
997.816
997.793
26.0
26.1
26.2
26.3
26.4
26.5
26.6
26.7
26.8
26.9
996.784
996.757
996.730
996.704
996.677
996.650
996.623
996.595
996.568
996.541
31.0
31.1
31.2
31.3
31.4
31.5
31.6
31.7
31.8
31.9
995.341
995.310
995.279
995.248
995.216
995.185
995.153
995.122
995.090
995.058
36.0
36.1
36.2
36.3
36.4
36.5
36.6
36.7
36.8
36.9
993.684
993.649
993.614
993.578
993.543
993.508
993.472
993.436
993.400
993.365
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
999.940
999.943
999.946
999.949
999.952
999.954
999.956
999.959
999.961
999.962
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
999.902
999.897
999.892
999.887
999.882
999.877
999.871
999.866
999.860
999.854
12.0
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
999.497
999.486
999.474
999.463
999.451
999.439
999.427
999.415
999.402
999.390
17.0
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
17.9
998.775
998.757
998.740
998.722
998.704
998.687
998.669
998.650
998.632
998.614
22.0
22.1
22.2
22.3
22.4
22.5
22.6
22.7
22.8
22.9
997.770
997.748
997.725
997.702
997.679
997.656
997.632
997.609
997.586
997.562
27.0
27.1
27.2
27.3
27.4
27.5
27.6
27.7
27.8
27.9
996.513
996.486
996.458
996.430
996.403
996.375
996.347
996.318
996.290
996.262
32.0
32.1
32.2
32.3
32.4
32.5
32.6
32.7
32.8
32.9
995.026
994.995
994.962
994.930
994.898
994.866
994.834
994.801
994.769
994.736
37.0
37.1
37.2
37.3
37.4
37.5
37.6
37.7
37.8
37.9
993.329
993.293
993.257
993.221
993.184
993.148
993.112
993.075
993.039
993.002
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
999.964
999.966
999.967
999.968
999.969
999.970
999.971
999.971
999.972
999.972
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
999.848
999.842
999.836
999.830
999.823
999.816
999.810
999.803
999.795
999.788
13.0
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
13.9
999.377
999.364
999.352
999.339
999.326
999.312
999.299
999.286
999.272
999.258
18.0
18.1
18.2
18.3
18.4
18.5
18.6
18.7
18.8
18.9
998.596
998.577
998.558
998.540
998.521
998.502
998.483
998.463
998.444
998.425
23.0
23.1
23.2
23.3
23.4
23.5
23.6
23.7
23.8
23.9
997.538
997.515
997.491
997.467
997.443
997.419
997.394
997.370
997.346
997.321
28.0
28.1
28.2
28.3
28.4
28.5
28.6
28.7
28.8
28.9
996.234
996.205
996.177
996.148
996.119
996.090
996.062
996.033
996.003
995.974
33.0
33.1
33.2
33.3
33.4
33.5
33.6
33.7
33.8
33.9
994.703
994.670
994.638
994.605
994.572
994.539
994.505
994.472
994.439
994.405
38.0
38.1
38.2
38.3
38.4
38.5
38.6
38.7
38.8
38.9
992.965
992.929
992.892
992.855
992.818
992.781
992.743
992.706
992.669
992.632
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
999.972
999.972
999.972
999.971
999.971
999.970
999.969
999.968
999.967
999.965
9.0
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
999.781
999.773
999.766
999.758
999.750
999.742
999.734
999.725
999.717
999.708
14.0
14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
999.244
999.230
999.216
999.202
999.188
999.173
999.159
999.144
999.130
999.115
19.0
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
19.9
998.405
998.386
998.366
998.346
998.326
998.306
998.286
998.266
998.245
998.225
24.0
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.9
997.297
997.272
997.247
997.222
997.197
997.172
997.147
997.121
997.096
997.071
29.0
29.1
29.2
29.3
29.4
29.5
29.6
29.7
29.8
29.9
995.945
995.916
995.886
995.857
995.827
995.797
995.768
995.738
995.708
995.678
34.0
34.1
34.2
34.3
34.4
34.5
34.6
34.7
34.8
34.9
994.372
994.338
994.304
994.271
994.237
994.203
994.169
994.135
994.101
994.066
39.0
39.1
39.2
39.3
39.4
39.5
39.6
39.7
39.8
39.9
992.594
992.557
992.519
992.481
992.444
992.406
992.368
992.330
992.292
992.254
5.0
999.964
10.0 999.700
01/2013
15.0 999.100
20.0 998.204
25.0 997.045
4
30.0 995.647
35.0 994.032
40.0 992.215
Determinations
Recognised-value Standard of the Density
of Standard Mean Ocean Water
Recognised-value Standard of the Dynamic
Viscosity of Water at a Temperature in the
Range 19.98°C to 20.02°C
In pursuance of paragraph 8A(1)(a) of the
National Measurement Act 1960, it was
determined that the magnitude of the density
of standard mean ocean water at a temperature
of 3.99°C and at a mean pressure of 101 325
Pa shall be a recognised-value standard of
measurement having the exact value
999.975 kg m-3.
In pursuance of paragraph 8A(1)(a) of the
National Measurement Act 1960, it was
determined that the magnitude of the dynamic
viscosity of water prepared as in the Schedule
and at a temperature in the range 19.98°C to
20.02°C shall be a recognised-value standard
of measurement having the value of
0.001 002 Pa.s.
For the purposes of this Determination
standard mean ocean water is pure water, free
of dissolved gas, in which the ratio of the
number of oxygen atoms of mass number 18 to
the number of oxygen atoms of mass number
16 is 0.002 005 and the ratio of the number of
deuterium atoms to the number of hydrogen
atoms is 0.000 155 76.
For the purposes of this Determination the
chance is not more than one in one hundred
that the viscosity of the water differs from the
designated value by more than 0.000 001 Pa.s.
The Schedule
The water shall have been prepared by being
distilled at least twice, the final distillation
having been performed after addition to the
water of potassium permanganate to a
concentration of not less than one part in ten
thousand by mass. In the final distillation the
distillate shall have been collected in silica or
borosilicate glass. The water shall have been
maintained subsequently in contact with air at
a pressure in the range 80 000 to 120 000 Pa,
and shall be free from bubbles. The electrical
resistivity of the water at 20°C shall be not less
than 1 000 Ω.m.
Recognised-value Standard of the Dynamic
Viscosity of Water at a Temperature of
20°C
In pursuance of paragraph 8A(1)(a) of the
National Measurement Act 1960, it was
determined that the magnitude of the dynamic
viscosity of water prepared as in the Schedule
and at a temperature of 20°C shall be a
recognised-value standard of measurement
having the exact value of 0.001 002 Pa.s.
The Schedule
The water shall have been prepared by being
distilled at least twice, the final distillation
having been performed after addition to the
water of potassium permanganate to a
concentration of not less than one part in ten
thousand by mass. In the final distillation the
distillate shall have been collected in silica or
borosilicate glass at a temperature of not less
than 10°C and nor more than 30°C in air at a
pressure in the range 80 000 to 120 000 Pa,
and shall have been maintained subsequently
in contact with air within that temperature
range and pressure range. The water shall be
free from bubbles and its electrical resistivity
at 20°C shall be not less than 3 000 Ω.m.
01/2013
Recognised-value Standard of the Velocity
of Electromagnetic Waves in a Vacuum
In pursuance of paragraph 8A(1)(a) of the
National Measurement Act 1960, it was
determined that the magnitude of the velocity
of electromagnetic waves in vacuum shall be a
recognised-value standard of measurement
having an exact value of 299 792 458 m.s-1.
5
Determinations
Reference ellipsoid — Geodetic Reference
System 1980 (GRS80) ellipsoid with a semimajor axis (a) of 6 378 137 metres exactly and
an inverse flattening (1/f) of 298.257 222101.
Recognised-value Standard of Position of
the Australian Fiducial Network Locations
Under paragraph 8A(1)(a) of the National
Measurement Act 1960, the positions of the
Australian Fiducial Network locations listed
below and in the stated reference ellipsoid and
reference frame, are recognized-value standards
of measurement of the physical quantity
position:
Reference frame — the Geocentric Datum of
Australia is realised by the coordinates of the
following Australian Fiducial Network
geodetic stations referred to the GRS80
ellipsoid determined within the International
Earth Rotation Service Terrestrial Reference
Frame 1992 (ITRF92) at the epoch 1994.0.
Adelaide (ADE1)
138°
38’ 50.43453”
34°
43’ 44.41404”
Elevation
(from ellipsoid)
38.1293 m
Alice Springs (ALIC)
133°
53’ 7.84785”
23°
40’ 12.44602”
603.3466 m
Burnie (BUR1)
145°
54’ 53.4412”
41°
3’
3.1531 m
Ceduna (CEDU)
133°
48’ 35.37558”
31°
52’ 0.01657”
144.8196 m
Cocos Island (COCO)
96°
50’ 2.27360”
12°
11’ 18.06739”
-35.2309 m
Darwin (DARW)
131°
7’
12°
50’ 37.35864”
125.2124 m
Hobart (HOB2)
147°
26’ 19.43574”
42°
48’ 16.98538”
41.1389 m
Karratha (KARR)
117°
5’
20°
58’ 53.16983”
109.2269 m
Macquarie Island (MAC1)
158°
56’ 8.99643”
54°
29’ 58.32845”
–6.7231 m
Melbourne (MOBS)
144°
58’ 31.20646”
37°
49’ 45.89904”
40.6710 m
New Norcia (NNOR)
116°
11’ 33.76803”
31°
2’
55.46714”
234.8939 m
Parkes (PARK)
148°
15’ 52.58905”
32°
59’ 55.58175”
397.4436 m
Perth (PERT)
115°
53’ 6.88639”
31°
48’ 7.09686”
12.7697 m
Mount Stromlo (STR1)
149°
0’
36.17971”
35°
18’ 55.93958”
800.0226 m
Mount Stromlo (STR2)
149°
0’
36.54756”
35°
18’ 58.1991”
802.5632 m
Sydney (SYDN)
151°
9’
1.35691”
33°
46’ 51.18426”
85.6781 m
Tidbinbilla (TIDB)
148°
58’ 47.98444”
35°
23’ 57.15619”
665.4232 m
Townsville (TOW2)
147°
3’
20.46531”
19°
16’ 9.42824”
88.2292 m
Christmas Island (XMIS)
105°
41’ 18.58058”
10°
26’ 59.89868”
261.5892 m
Yarragadee (YAR1)
115°
20’ 49.10002”
29°
2’
47.61682”
241.3533 m
Yarragadee (YARR)
115°
20’ 49.08938”
29°
2’
47.74264”
241.4231 m
Location (identifier)
01/2013
East longitude
South latitude
57.8479”
49.87277”
6
0.24611”
Determinations