13
Automatic surface film skimmer works to attain the right test result when the setting temperature is
reached.
For the starting temperature and interval setting of skimmer, see
3.7.
3.3.5 User’s Custom Mode
In this mode, heating rate, stirring speed, application interval and its start temperature can be
changed by operator.
3.4 Test Procedure in Normal Mode
3.4.1 Setting of Expected Flash Point
WARNING The sample may catch a fire, if an erroneous expected flash
point was set.
The expected flash point is displayed in a three-digit figure below the
EXP.F.P
on the right end of
the display. When altering the expected flash point, press the
Right-Left
key to move the cursor,
and after that, operate the
Up-Down
keys. No numeric figures above 400 (760 in
o
F) can be set.
3.4.2 Preparation of Test Cup and Sample
(1)
Wash the test cup with the cleaning solvent to remove any test specimen or traces of gum or
residue remaining from a previous test. When the upper side of cup’s flange is covered with
carbon deposit, the flash detector cannot operate normally. Also when conductive material
adheres to the insulator of electrode ring (outer ring), bad insulation can cause mis-detection of
flash. Therefore, keep the parts cleanly.
(2)
When testing samples of very viscous materials and containing dissolved or free water, follow
Sampling section of ASTM D92.
(3)
Fill the test cup with the sample so that the top of the meniscus of the test specimen is exactly at
the filling mark
(4)
Push up the arm handle and place the test cup on the center of the heater
(5)
Lower the arm gently until stopper is touching the flange of the cup.
Now you have completed the preparation for the test.
3.4.3 Test Start
WARNING Toxic gas may generate as a result of decomposition of specimen
in the course of heating. Provide adequate ventilation.
Specimen may catch fire in the course of a test. Place a fire
extinguisher near the Tester. Also, do not leave the Tester
unattended.
Press the
START
switch;
RUN
lamp illuminates, and the test starts. The expected flash point (
*1
)
is displayed for 5 seconds, dual electric pilots light up and specimen heating starts.
Test flame is ignited by electric pilots automatically. Adjust the test flame to 4mm in diameter (the
flame size comparison bead size) by needle valve.
The test proceeds automatically hereafter.
!
!
