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13 Measurements and device constants
Ubbelohde viscometer
Type no.
Capillary no.
... 00
0
... 03
0c
... 01
0b
... 10
I
... 13
Ic
... 20
II
... 23
IIc
... 30
III
... 33
IIIc
... 40
IV
... 43
IVc
* previously centistokes [cSt]; 1 [cSt] = 1 [mm
14 Table of the
Ubbelohde viscometer
Correction seconds
1)
Flow time [s]
50
75
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
1
) The correction seconds stated are related to the respective theoretical constant.
2
) For precision measurements, these flow times should not be applied.
A selection of a viscometer with a smaller capillary diameter is suggested.
ISO 3105, ASTM D 2515
Type no. 545 ..
Capillary
Constant K
∅
(mm)
i
0.24
0.001
0.36
0.003
0.46
0.005
0.58
0.01
0.78
0.03
1.03
1.36
1.83
2.43
3.27
4.32
kinetic energy correction (HC)
ISO 3105, ASTM D 2515
Type no. 545 ..
:
Capillary no.
0
0b
2
–
)
(5.06)
2
2.25
–
)
2
1.26
(3.69)
)
2.36
0.81
1.64
0.56
1.21
0.41
0.92
0.32
0.73
0.25
0.59
0.20
0.49
0.17
0.41
0.14
0.35
0.12
0.30
0.10
0.26
0.09
0.23
0.08
0.20
0.07
0.18
0.06
0.16
0.06
0.15
0.05
16
Measuring range mm
(approx.)
0.3
0.6
1
2
6
0.1
20
0.3
60
1
200
3
600
10
2000
30
6000
2
/s]
0c
I
2
2
)
(6.69)
)
(2.45)
2.98
1.09
1.67
0.61
1.07
0.39
0.74
0.27
0.55
0.20
0.42
0.15
0.33
0.12
0.27
0.10
0.22
0.08
0.19
0.07
0.16
0.06
0.14
0.05
0.12
0.04
0.11
0.04
0.09
0.08
0.07
2
/s (cSt)
(approx.)
to
1
to
3
to
5
to
10
to
30
to
100
to
300
to
1000
to
3000
to
10000
to
30000
Ic
2
)
0.41
0.18
0.10
0.07
0.05
0.03
0.03
0.02
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