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Lock the controller
You can protect the TC 504 from unauthorized usage by locking the keypad. Push
the "O" in ROHDE for at least 3 seconds. A spot on the left side of the temperature
display indicates that the controller is locked. To unlock, push the "O" in ROHDE
until the red spot goes out.
Power failure
The firing will be interrupted if there is a power failure during firing. After re-establi-
shing the power supply the firing process continues from where it was interrupted.
If the kiln temperature drops more than 50°C during the power failure, the firing will
be interrupted (an error message will be displayed, see Appendix A).
If the power failure continues for more than 30 minutes, the program will be inter-
rupted and the process will stop as the quality of the fired goods cannot be
guaranteed.
Hold the firing process
The TC 504 allows you to hold the firing pro-
cess manually. Press the "O" in ROHDE and
"prog" key in order to hold the firing in process
(the display shows "hold" flashing). Both time
count and setpoint temperature in ramps stop.
Thus the kiln is held at the actual setpoint tem-
perature for an indefinite time (only in con-
trolled ramps!). The firing process is held until
you press the "O" in ROHDE and "prog" key
again.
TC 504 Controller with 2 or 3-zone control
If your kiln is equipped with 2 or 3 heating zones (optional), the TC 504 allows you
to control the respective zones and their heating automatically according to the
setpoint temperature curve. This ensures even distribution of heat.
Push the "zone" key to call the actual values of each heating zone. The display
shows the different zones.
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