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INSTRUCTION MANUAL
Cup type
Time margin (s)
DIN 53211 Ø4
ISO 2431 Ø3
ISO 2431 Ø4
ISO 2431 Ø5
ISO 2431 Ø6
ASTM D-1200 Ø2.53 40...100
ASTM D-1200 Ø3.40 20...100
ASTM D-1200 Ø4.12 20...100
J
.P. SELECTA s.a.u.
CODE 80180 REV A
CALCULATIONS
VISCOSITY AND ACCURACY CALCULATION
If knowing emptying time, it is possible to calculate kinematic viscosity
(see table).
These formulas give viscosity in cSt. To convert units, use the following
converting factors.
Relationship between viscosity and kinematic viscosity:
Centipoises = centistokes x density
The accuracy of measurement, if this has been carried out according
to the applicable standard, is 3% (10% on ASTM D 1200).
Taking measurements in the right temperature conditions requires a
lot of preparation.
Calculation table
Calculation formula
25...150
v = 4.57t - (452/t)
30...100
v = 0.443t - (200/t)
30...100
v = 1.37t - (200/t)
30...100
v = 3.28t - (220/t)
30...100
v = 6.90t - (570/t)
v = 1.44(t - 18)
v = 2.31(t - 6.58)
v = 3.85(t - 4.49)
Autovía A-2 Km 585.1 Abrera 08630 (Barcelona) España
e-mail: selecta@jpselecta.es - website: http://www.grupo-selecta.com
07/2021
1 centistokes = 0.01 stokes
1St = 1x10
m
/s
-4
2
1m
/s= 10000 St
2
1cSt = 1x 10
m
/s = 1mm
-6
2
1 m
/s = 1 000 000 cSt
2
Measurement range (cSt) Nominal error
90...700
5...42
35...135
100...350
190...680
27...110
31...215
60...370
Tel 34 937 700 877 Fax 34 937 702 362
Page: 15
/s
2
3%
3%
3%
3%
3%
10%
10%
10%
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