How to use a Viscosity Cup
Once the viscosity cup is truly horizontal (this is best achieved using a cup stand and bubble level), cover the exit orifice and fill the cup making sure that the meniscus of the liquid is above the rim of the cup.
Using the glass draw plate, remove the meniscus into the overflow ring and close the cup.
Open the exit orifice and remove the glass draw plate. Time between the removal of the glass draw plate and the first break in the liquid's flow is measured.
Viscosity Cup Reference Table - For information Purposes Only
Cup Type |
Range (cSt) |
Time (seconds) |
Advised Standard Oil |
Kinematic Viscosity** (cSt) |
Drain Time** (seconds) |
|
Minimum |
Maximum |
Minimum |
Maximum |
|
|
|
DIN 4 |
96 |
683 |
25 |
150 |
S200 |
460 |
101.5 |
ISO 3 |
7 |
42 |
30 |
100 |
S20 |
34 |
82.5 |
ISO 4 |
34 |
135 |
30 |
100 |
N35 |
66 |
47 |
ISO 5 |
91 |
326 |
30 |
100 |
N100 |
230 |
71 |
ISO 6 |
188 |
684 |
30 |
100 |
S200 |
460 |
68 |
ASTM 1 |
10 |
35 |
55.5 |
106.5 |
N10 or C10* |
17 |
69.5 |
ASTM 2 |
25 |
120 |
35.5 |
87.5 |
S20 or C20* |
34 |
41.5 |
ASTM 3 |
49 |
220 |
28 |
102 |
S60 or C60* |
120 |
58.5 |
ASTM 4 |
70 |
370 |
23 |
101 |
S60 or C60* |
120 |
35.5 |
ASTM 5 |
200 |
1200 |
18.5 |
101 |
S200 or C200* |
460 |
40 |
ZAHN 1 |
5 |
56 |
33.5 |
80 |
N10 or C10* |
17 |
44.5 |
ZAHN 2 |
21 |
231 |
20 |
80 |
S60 or C60* |
120 |
48 |
ZAHN 3 |
146 |
848 |
20 |
80 |
S200 or C200* |
460 |
47 |
ZAHN 4 |
222 |
1110 |
20 |
80 |
S200 or C200* |
460 |
36 |
ZAHN 5 |
460 |
1840 |
20 |
80 |
N350 or C350* |
850 |
36.5 |
AFNOR 2.5 |
5Cps |
140Cps |
30 |
250 |
S60 |
120 |
*** |
AFNOR 4 |
50Cps |
1100Cps |
20 |
300 |
S200 |
460 |
*** |
AFNOR 6 |
510Cps |
5100Cps |
30 |
300 |
S600 |
1600 |
*** |
* With the 'S' and 'N' prefix you have dynamic viscosity, kinematic viscosity and density at different temperatures; with the 'C' prefix, kinematic viscosity and drain time is at 25ºC (77ºF) for Zahn, Ford and Shell Cups.
** Kinematic viscosity and drain times mentioned above are approximate values at 25ºC (77ºF). Exact values will be displayed on the standard oil bottle.
*** For comparison only. |
