Tinius Olsen MP1200 - Date;Time

Tinius Olsen MP1200 Extrusion Plastometer Page 12-11
Operation Manual # 02002215
12.2.3 The Cal Offsets screen (include screen shot) shows each desired SP Temp and the
adjustment added for each zone (Top , Middle, and Bottom) to make the displayed
temperature for each zone match the reference thermometer at that point.
12.2.4 The MP1200 normally only shows the temperature at the Bottom zone. However all
three zone readings can be seen on the PID tab found under Configuration (include
screen shot).
12.2.5 The Cal Offset is the value that must be added to the current display reading to make
it match the actual thermometer reading. For example, if the SP is 200
o
C and the
Bottom zone is showing a stable reading of 200.0
o
C but the thermometer (at the
Bottom zone, 10 mm above the top of the die) reads 199.5
o
C, then the Cal Offset
should be -0.5 (add this to any existing offset that may currently exist). That will then
make the controller read 199.5
o
C. That tells the controller it needs to add a little
more power to get back to 200
o
C. When it does show 200.0
o
C, it should match the
thermometer. It may take several attempts to get the Cal Offset correct. And a
change to one zone may affect the others so you will need to check them after
making any change.
12.2.6 If the zone reading, for example the Middle zone (shown on PID screen), reads 200.0
o
C, but the thermometer in the middle position (45 mm above the top of the die)
reads 200.4
o
C. You would enter a Cal Offset of 0.4 for the middle zone. (Add this to
any existing offset that may exist).That would make the middle zone display read
200.4
o
C. The controller would then know to reduce the power to the middle zone
until it drops to 200.0
o
C, which should then match the thermometer. Again, it may
take several attempts to get the Cal Offset correct. And a change to one zone may
affect the others so you will need to check them after making any change.
12.2.7 Just about any number of SP temperatures can be entered in this table. Each
program in the MP1200 has a SP temperature entered. That will then reference the
appropriate Cal Offsets for that SP temp in the look up table. If that SP temp doesn’t
exist in the table the user will be prompted with a warning.
12.2.8 If the Service Calibration has been done properly, most Cal Offsets will be fairly
small. In no case can they exceed +/- 10 deg C. Cal Offsets for 190, 230, and 300
o
C should be close to 0 if the Service Cal was done properly.
To remove an offset, press the REMOVE OFFSET button.
12.3 Date/Time
12.3.1 Press the DATE/TIME button at the top of the screen.
12.3.2 Enter the date and time, if desired.
12.3.3 Press OK when finished.