Measure what you see.
Cup No. 2 / No. 3 / No. 4
Ford Viscosity Cups
A member of
Operating Instructions
Additives & Instruments
Ford Viscosity Cups
Cup No. 2 / No. 3 / No. 4
Operating Instructions
English
Cat. No. 7201
Cat. No. 0173
Cat. No. 0174
BYK - Gardner USA
9104 Guilford Road
Columbia, MD 21046
USA
Phone 800-343-7721
301-483-6500
Fax 800-394-8215
301-483-6555
www.byk.com/instruments
BYK-Gardner GmbH
Lausitzer Str. 8
D-82538 Geretsried
Germany
Tel. 0-800-gardner
(0-800-4273637)
+49-8171-3493-0
Fax +49-8171-3493-140
4
General Information
General Information
Ford Viscosity Cups have been produced by
Gardner Laboratory for over forty years.
Each cup produced has been in conformance
with Viscosity Cup flow characteristics as
initially listed in ASTM Bulletin No. 169 of
October 1950. The Ford Cups produced by
BYK-Gardner comply with the requirements
listed in ASTM D 1200.
5
Operation
Operation:
1. Select Cup #2, #3, or #4 to provide a test
efflux time within the range covered by the
attached table at a controlled temperature
of 77ºF (25ºC).
2. Place the selected Ford Cup in the ring of the
stand which has been leveled.
3. Mix, filter (if necessary) and temperature
condition the sample to be measured,
avoiding entrapment of air bubbles.
4. Close the orifice of the cup with a finger
and fill to overflowing with the conditioned
sample.
5. Remove excess sample by sliding the cover
glass flush with the top of the cup. Most
materials will not flow from the orifice while
the cover glass is in place so that the finger
may be removed from the orifice.
6. Place a receptacle directly under the orifice
to catch the sample as it flows from the cup.
7. Slide the cover glass from the top of the cup
and simultaneously start timing the efflux.
8. Confirm the desired temperature of the
sample directly in the efflux stream.
9. Measure the time to the nearest 0.2-second
from the moment efflux commences until
the first break in the stream occurs below
the orifice. This time in seconds may be
converted to centistokes by use of the
attached table.
10. Record both the efflux time and the type of
Ford Cup used (for example 60 seconds with
the
No. 4 Ford Cup) as well as the measured
efflux temperature.
6
Recalibration:
Recalibration
The Ford Cups are milled from solid aluminum
bar stock and are fitted with a stainless steel
orifice. Each cup is tested with a viscous fluid
referenced to National Bureau of
Standards certified oils. The orifice is honed to
insure that the assembly complies to the
applicable „time viscosity“ flow formula. If the
orifice of the cup becomes damaged or
worn and the original calibration is questioned,
the cup should be returned to BYK-Gardner,
to be checked, fitted with a new orifice (if
necessary) and recalibrated.
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CONVERSION TABLE FOR FORD VISCOSITY CUPS
Efflux Time in Seconds to Kinematic Viscosity in Centistokes
Centistokes for Cup
Seconds #2 #3 #4
23 - - 75
24 - - 75
25 - - 79
26 - - 83
27 - 47 87
28 - 50 90
29 - 52 94
30 - 54 98
31 - 57 102
32 - 59 106
33 - 61 110
34 - 64 113
35 - 66 117
36 - 68 121
37 - 70 125
38 - 73 129
39 - 75 133
40 - 77 137
41 - 80 141
42 - 82 144
43 - 84 148
44 - 87 152
45 - 89 156
46 38 91 160
47 40 94 164
48 42 96 178
49 43 98 171
50 45 101 175
Centistokes for Cup
Seconds #2 #3 #4
51 47 103 179
52 48 105 183
53 50 107 187
54 52 110 191
55 53 112 195
56 55 114 198
57 56 117 202
58 58 119 210
60 61 124 214
61 63 126 218
62 64 128 221
63 66 131 225
64 67 133 229
65 69 135 233
66 70 138 237
67 72 140 241
68 73 142 244
69 74 145 248
70 76 147 252
71 77 149 256
72 79 151 260
73 80 154 264
74 81 156 268
75 83 158 271
76 84 161 275
77 85 163 279
78 87 165 283
79 89 168 287
80 89 170 291
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CONVERSION TABLE FOR FORD VISCOSITY CUPS
Efflux Time in Seconds to Kinematic Viscosity in Centistokes
Centistokes for Cup
Seconds #2 #3 #4
81 91 172 194
82 92 175 298
83 93 177 302
84 94 179 306
85 95 182 310
86 97 184 314
87 98 186 317
88 99 188 321
89 100 191 325
90 101 193 329
91 102 195 333
92 103 198 337
93 105 200 341
94 106 202 344
95 107 205 348
96 108 207 352
97 109 209 356
98 110 212 360
99 111 241 364
100 112 216 367
Care and Maintenance:
Clean the cup by use of a suitable solvent and a
cleaning swab or soft brush following
each use. In cleaning the orifice, take special
care to avoid leaving any film deposits on
the inside wall. Under no condition should
cleaning tools made of metal be brought into
contact with the orifice.
9
253 017 659 EDFIS 0408 Europe
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