K13992 Cleveland Open Cup Flash Point Tester
Operation and Instruction Manual
K13992-Manual
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11-
5 Operation
5.1 Test Procedure
1.
Be sure all tests be performed in a room free of
excessive drafts. The room or compartment
should be darkened sufficiently to allow the
flash to be readily seen. Avoid breathing over
the surface of the test oil.
2.
Suspend the thermometer in a vertical position
by the thermometer holder
(Figure 1, Item 5)
so that the bottom of the bulb is ¼” from the
bottom of the cup, and a point half way
between the center and the back of the cup.
3.
Fill the cup with the sample oil (approximately
70mL) so that the top of the meniscus is
exactly
at
the
filling
line
at
ambient
temperature. There should not be any test
specimen on the outside of the test cup. If
there is, empty, clean and refill the cup.
NOTE:
Viscous samples should be
heated until they are reasonably fluid before
being poured into the cup, however the
temperature during heating must not exceed
100°F (56°C) below the probable flash point.
4.
Position the test cup on the center of the
heating plate.
5.
Press Flame Control Switch
(Figure 1, Item 3)
to the ON position.
6.
Light Test Flame Applicator
(Figure 1, Item 5)
using external heat source.
7.
Use a test flame approximately 5/23 of an inch
in diameter, the same size as the test flame
guide
(Figure 1, Item 8)
. Turn the gas
adjustment valve
(Figure 2, Item 10)
if needed,
until the flame compares to the flame guide.
8.
Press Power Switch
(Figure 1, Item 1)
to the
ON position.
9.
Turn Temperature Control Dial
(Figure 1, Item
2)
clockwise and apply heat initially at such a
rate that the temperature on the thermometer
increases 5 to 17°C (9 to 30°F) / min.
10.
When the test specimen temperature is
approximately
56°C
(100°F)
below
the
expected flash point, decrease the rate so that
the temperature rise during the last 28°C (50°F)
before the flash point is 5 to 6°C (9 to 11°F) /
min.
11.
Apply the test flame when the temperature of
the test specimen is approximately 28°C below
the expected flash point and each time
thereafter at a temperature reading that is
a
multiple of 2°C (5°F).
12.
At the time of the next test flame application,
pass the test flame in the opposite direction of
the preceding application. The time consumed
in passing the test flame across the test cup in
each case shall be approximately 1 ± 0.1 s.
13.
During the last 28°C (50°F) rise in temperature
prior to the expected flash point, care shall be
taken to avoid disturbing the vapors in the test
cup with rapid movements or drafts near the
test cup.
14.
If foam persists on the top of the test
specimen before the expected flash point,
terminate the test and disregard any results.
15.
Record, as the observed flash point, the
reading on the temperature measuring device
when a large flame appears and flash appears
and instantaneously propagates itself over the
entire surface of the test specimen.
NOTE:
The application of the test flame
can cause a blue halo or an enlarged flame
prior to the actual flash point. This is not a flash
point and shall be ignored.
16.
To determine the Fire Point, after the flash
point has been established and recorded,
continue heating the oil at the specified rate of
5 to 6°C (9 to 11°F)/min and apply the test
flame at the same intervals (every 2°C or 5°F)
until the oil ignites and continues to burn for a
period of at least 5 seconds. The temperature
reading at the time of the flame application that
caused burning for a period of 5 seconds or
more is the fire point.
