On uncontrolled ramps the TC505 stays in the segment
until the final temperature is reached. On multizone
kilns the TC505 waits for all zones. To avoid the
process locking itself because of heat-shift between
the zones, there is a complex algorithm which realizes
this situation and causes a step to the next segment.
On severe errors (like a broken sensor etc.) the TC505
interrupts the process and shows an error message.
The TC505 provides you with the feature to hold the
process manually. Press key (11) followed by the digit
key „0“ (hold). Display (14) shows flashing „hold“ and
the firing process is held until the key (11) followd by
key „0“ is pressed again.
A „hold“ causes the programme to remain at the
setpoint in a controlled (!) ramp by holding the time.
In a dwell the time is also held infinitely.
Your TC505 provides you with the option of entering
the heating and cooling ramps as time (hours /
minutes) rather then degrees centigrade per hour
(°C/h). Some people are still more used to these values
although they are a leftover from controllers used in
the past. Your ceramic is interested in the temperature
gradient and not in the time required for it !
In the example given on page 4 enter 2 hours (instead
of 200°C/h) in segment (b). Enter a time of „0.00“ to
programme uncontrolled heating / cooling (SKIP).
Appendix C explains how to change the controllers
configuration (set parameter 11 to „time“).
12
Hold Process
Interruption of the
firing on Errors
shift
0
hold
t2
t1
t0
rmp3
rmp1
rmp2
tmp2
tmp1
°
C/h
h.min
°
C
°
F/h
°
F
Heating / Cooling
Segments entered
as Time
rmp1
t2
t1
t0
rmp3
rmp1
rmp2
tmp2
tmp1
°
C/h
h.min
°
C
°
F/h
°
F
Uncontrolled Ramps
(SKIP)
