14
3.4.6 Completion of a Test
WARNING If test cup and test cover are still hot after cooling is finished, do
not touch except arm handle without wearing gloves.
Be careful when handling the hot specimen. It may flash or
explode, if you disposed it to waste tank containing waste with
low flash point.
The cooling fan stops (the
COOL
lamp goes off) in 10 minutes (
*4
) after the flame detection. One
cycle of a test is completed at this moment and you can start the next test. When further cooling is
required, press the
COOL
switch. Cooling is available for another 10 minutes (
*4
).
The temperature display (flash point) is held until the
RESET
or
START
switch is pressed.
*4:
Cooling time is adjustable. For changing cooling time, consult Tanaka authorized
distributor.
3.5 Test by Special (Fast Search) Mode
This mode is used for measuring an approximate flash point of a specimen of unknown expected
flash point. With a faster temperature rise speed, the mode starts the ignition source application
from the test start.
Other than the temperature rise speed and the ignition source application, all the rest of the test
procedure is the same as the standard ASTM test mode’s. The following shows only differences
from ASTM mode. See Section
3.4.1
to
3.4.6
also.
(1)
The temperature rises at 14 to 17
o
C /min (25 to 30
o
F /min) in Procedure-A, at 6.5 to 7.5
o
C /min
(12 to 14
o
F /min) in Procedure-B, at 7
o
C /min in Procedure-C up to 50
o
C (90
o
F) below the
expected flash point, and after that, at 5 to 6
o
C /min (9 to 11
o
F /min) in Procedure-A, at 1 to 1.5
o
C /min (2 to 3
o
F /min) in Procedure-B, at 3
o
C /min in Procedure-C.
(2)
Immediately after the test starts, the ignition source application starts at each 2
o
C (5
o
F).
Application frequency is not dependent on the expected flash point.
!
