12
application operation is repeated at each 1
o
C (2
o
F) for an expected flash point at/below 110
o
C
(230
o
F), and each 2
o
C (5
o
F) for above 110
o
C (230
o
F).
When expected flash point is set at/below 130
o
C , The ignition source begins to apply when the
temperature becomes 22
o
C (40
o
F) (
*2
) below the expected flash point. After that, the application
operation is repeated at each 1
o
C (2
o
F) for an expected flash point at/below 110
o
C (230
o
C), and
each 2
o
C (5
o
F) for above 110
o
C (230
o
F).
Note- as a safety practice, for an expected flash point above 130 ° C, ignition source dips every 10°C throughout the
test until the sample temperature reaches 28°
C in Procedure A & B, below t
he expected flash point.
(Ver
.7FP51F.
ROM or later)
*2:
Application starting temperature is adjustable. For changing temperature, consult
Tanaka authorized distributor.
3.4.5 Flash Detection
(1)
When the flash is detected, the observed flash point is corrected by barometric pressure and
rounded (
*3
, recorded flash point) and then starts flashing. See
Fig. 6
.
At the same time buzzer
beeps intermittently for 8 seconds. Furthermore, the solenoid valve for gas is closed, the test
flame goes out (when gas ignition is used) and electric ignitor goes off and the stove section
starts cooling down. (The
COOL
lamp lights up.)
Fig. 6 Flash Point is Detected Normally
*3:
The corrected flash point (
Fc
) is computed automatically by using the following
formula, rounded to the nearest 0.5
o
C (1
o
F) and then displayed.
Fc=C+0.025(1013-K) or Fc=F+0.06(760-P)
where
Fc
: Corrected flash point
C
: Observed flash point,
o
C
F
: Observed flash point,
o
F
K
: Entered (detected) barometric pressure value (hPa)
P
: Entered (detected) barometric pressure value (mmHg).
Observed flash point can be seen by pressing
FUNCTION
key.
In case a wrong pressure value has been entered, enter the right value and then press
FUNCTION
key; recalculated flash point will be shown.
APM FLASH P EXP.FP
Electric
CORRECTED 270
-A-
o
C
270.5
Flash Point (flashing)
