The prevent the TC505 from unauthorized usage you
can lock the keypad by pressing the key (10) for about
3 seconds. The indicator (2) shows the TC505 is now
locked. If the controller is locked you can for instance
only call up values but not start or interrupt a firing.
To unlock the controller press and hold key (10) again
until the indicator (2) goes off.
In case of a power breakdown the firing process is
interrupted. After power is established again the firing
process is continued from that point at which it was
interrupted. If the kiln temperature has dropped more
than 50°C since the power failure happened the firing
is interrupted (an error messages comes up - see
appendix A).
In theory a ramp takes exactly the time which is
programmed. However, if at the beginning of a ramp
the actual kiln is higher than the initial ramp tem-
perature the time is adjusted accordingly. Example:
Ramp in 2 hours up to 500°C. If the kiln is already at
250°C the time is set to 1 hour only. This also ensures
that the setpoint starts at the kiln temperature. The
ramp is finished when the time has elapsed.
What happens if the kiln temperature is unable to
keep up with the programmed temperature increase?
Example: Ramp asks in 1 hour to 1000°C. Your TC505
handles this situation as best as possible (only if para-
meter #9 is set to 0 or 1): When the heating power
reaches 100% (and therefore there is no control any
more) the ramp time (or setpoint) is held (display (14)
flashes „hold“). When the kiln temperature has caught
up the time continues automatically.
To avoid a firing process locking itself because of lack
of kiln power in a ramp an automatic continuation is
performed.
By using the function „hold“ you can also manually
release the ramp „hold“ (press shift + key 0, see
below).
11
Power Failure
Locking the Controller
Actual Duration of a
Segment
Kiln can not follow
the Ramp
