ALTANA Ford Viscosity Cups - Manual (Page 5)

6
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.
Operation