Tinius Olsen MP1200 - Page 91

Tinius Olsen MP1200 Extrusion Plastometer Page 15-10
Operation Manual # 02002215
15.3.11Observe the “PISTON HT” on the display. When the weight drives the arm of
the PPDT to the “Start Capture 1” Height, i.e., 46 mm (1.81“), a single beep
will sound. Simultaneously with this single beep, use the Cut-Off Tool to cut
off and discard the material that has extruded through the orifice during the
preheat period. The MP1200 will automatically start recording the time it
takes for the piston to travel the programmed travel distance entered in
13.2.18.
15.3.12When the arm of the PPDT reaches the end of the capture distance, the alarm
will sound again. Simultaneously with this alarm, cut off the material that has
extruded through the orifice during the capture time.
TEST TIP: For best accuracy it is important that the cut-offs are made directly at the bottom of the
orifice and precisely at the sound of the single and double beeps.
15.3.13The display will now prompt the user to enter the weight of the sample that
was cut off. Weigh the material cut off in 15.3.12, using the numeric buttons
to enter its weight (in grams). Press DONE when finished. The next screen
that appears confirms the weight entry. Press Continue to advance to the test
results.
15.3.14The pre-selected test results will be displayed. A test report can be printed
out, if desired. If a printer is not being used record any data as required.
15.3.15Allow the remaining material to purge from the cylinder and then, if the
machine is equipped with the optional WLD, raise the weight support platform.
15.3.16Rotate the PPDT counter-clockwise so that its arm is toward the rear of the
furnace. This will prevent damage to the arm during cleaning operations.
15.3.17Clean the piston, cylinder and orifice thoroughly as described in Section 16. IT
IS IMPERATIVE THAT THE MACHINE IS CLEANED AFTER EACH TEST. If
no more tests are needed, remove the piston and orifice from the furnace
before turning the MP1200 off to prevent them from being welded in place as
any material left in the barrel hardens.