Tinius Olsen MP1200 Extrusion Plastometer Page 2-4
Operation Manual # 02002215
2.3 Three-Zone Temperature Control
The temperature controller features three-zone proportional, integral, and derivative (PID)
control, assuring spatial temperature variations of less than ± 0.25°C along the test area of
the cylinder. Temperatures up to 450°C are controlled and displayed to ± 0.1°C; utilizing
three platinum RTD’s embedded in the cylinder wall. The controller also has built-in
temperature sensor recognition indicator. If an RTD opens or shorts out (or temperature
control becomes erratic), power to the heater is interrupted and an error message is
displayed.
2.4 Timing Systems
Timing functions up to 999 seconds are available for preheat timing, cut-off intervals,
operating a WLD, as well as other optional features. Piston displacement timing is
displayed in 0.01 second increments up to 1000 seconds and in 0.1 second increments
from 1000 to 3600 seconds. An audible alarm can be activated which will prompt the
operator to perform functions such as applying the load, cutting off the extrudate, etc.
2.5 Communications Port
The test information and results can be sent directly to an optional printer or the machine
can be interfaced to a computer utilizing the serial Communications Ports (USB and EIA-
232) provided as standard. Up to ten machines can be interfaced to a single computer
2.6 Multiple Data Determinations (Captures)
The MP1200, when equipped with the optional PPDT gives the operator the ability to make
up to 10 individual flow rate/volume rate (melt index) determinations within a single sample
charge when performing a test to ASTM Procedure B. While this feature is not required by
ASTM D 1238, it is required for ISO 1133 testing. It can also be useful for checking the
consistency of results and in improving accuracy by isolating sources of error such as air
bubbles and allowing the operator to eliminate obviously flawed data. The multiple capture
features may be used with any material, but it is most often used with materials that have
flow rates greater than 10 g/10 minutes. A typical example of the test parameters used for
a multi-capture test has been preprogrammed in Program #4 (see Table 11-1).
To Next Page
Loading...
