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5.5. Setting the Expected Pour/Cloud Point
!
Caution: Ensure that an approximate pour/cloud point is entered
prior to every test run. If an appropriate estimation is not
entered or the value entered is much greater than the
actual pour/cloud point, the testing procedure may be
prolonged or produce incorrect results.
In this instrument, the entry of an Expected pour/cloud point is essential. Be sure to enter an
appropriate value prior to each test. For PP/CP and PP tests, the estimate refers to the pour point,
while in CP tests, the estimate refers to the cloud point.
The Expected cloud/pour point display field in the upper right of the main screen (see Fig. 5 on page
14) consists of five individual fields for input purposes, the sign, a 2-digit integer, the decimal point,
and a single decimal place. Move the cursor (displayed as an underscore) using the left or right arrow
keys and increment or decrement the value of the selected digit using the up and down arrow keys
(the sign field alternates between blank for positive and - for negative).
The maximum value that can be set is 51.0.
When CP test with 1.0
°
C interval is chosen, the value of the decimal place is ignored, with only the
integer value being of significance. To avoid any confusion, it is suggested that an integral value is
entered in these situations.
If nothing at all is known about the pour or cloud points, it is better to choose a low value. Although
this will result in long measurement times, the results will be accurate.
5.6. Preheating Selection
Preheating refers to heating the specimen to 45
°
C once before cooling (refer to ASTM D97). As with
the Expected pour/cloud point, this setting should be reviewed prior to each test.
An arrow on the left of the Expected pour/cloud point display indicates if preheating is selected.
" " indicates preheating and " " indicates no preheating. To change this setting, move the cursor
(underscore) with the left and right arrow keys to the preheating arrow and change the setting with
the up or down key.
Preheating should be selected in the Expected pour/cloud point is higher than room temperature.
5.7. Entering Sample Names
To enable sample name input, the instrument must be configured in advance as described in the
attached Maintenance Manual.
When sample name input is enabled, the Sample Name Input Screen (Fig.9 on page 19) may be
accessed by repeatedly pressing the FUNCTION key until the screen is displayed. The order in which
