- 23 -
6.2.4. Cooling
The bath is cooled at preset rates, with different rates used above and below the switching
temperature of 40
°
C
(
7
)
above the Expected pour point. The product is shipped to cool at a rate of
4
°
C/min
(
7
)
until the switching temperature is reached and at a rate of 1
°
C/min
(
7
)
thereafter.
Note (7)
: For instructions on changing bath cooling rates and switching temperature, refer to the
attached Maintenance Manual.
6.2.5. Pour Point Detection Starting Temperature
※
This step is only applicable to pour point testing modes (“PP” or “PP/CP” displayed in the test
mode field).
When the specimen temperature has reached a prescribed temperature
(
8
)
, the first pour point
detection attempt begins. Detection is repeated at the detection interval chosen prior to testing,
which is shown in the test mode field.
Note (8)
: Pour point detection start temperature depends on the Expected pour point. If the
Expected pour point is below 30.0
°
C, a starting temperature of 15 above the Expected pour
point is used, otherwise a starting temperature somewhere in the range of 9
°
C to 14
°
C
above the Expected pour point is used.
If the pour point is detected in the first detection attempt, the test ends with the error message
shown in Fig. 15. In this case, a higher value of Expected pour point should be entered and the
test retried.
PP OVER > -10
TROUBLE No.08
Fig. 14: First Attempt for Pour Point Detection
Example error message that is displayed when the Expected pour point is set to -25.0 but the pour
point is detected on the first attempt at a temperature of -10.0
°
C.
