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Plunger Press Test
(Pressing Furnaces only)
Display Example # 18
The Plunger Press Test is used to test and adjust the rate at which the plunger moves down and back
up. The factory calibration has a plunger down time range of 12 to 18 seconds. The up time is factory
calibrated for 1.7 to 2.3 seconds.
To verify the plunger travel times, have the furnace idling at 700°C for at least one hour. Touch the
“Toggle” button. There should be a popping sound from inside the furnace as the “Press Solenoid” has
been activated. It should now read High. The “Press Dn Time” is incrementing and updates
approximately once a second. After a couple of seconds the “Plunger Up” status should have changed
to Low. When the plunger reaches the lower sensor the “Plunger Down” status should change to High
and the “Press Dn Time” will stop incrementing. As mentioned earlier, the time range should be
between 12 to 18 seconds.
NOTE! If the “Toggle” button has been touched and is in the middle of a downward cycle, repetitive
touches of the “Toggle” button will have no effect. To cancel a “Press Dn Test” touch the Back
button. You will be returned to the Calibration Menu screen.
Press Test
Press Dn Time 16.5 s
Door Open Time: 2.0 s
Plunger Up: High
Plunger Down: Low
Press Solenoid: Low
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