Calling Up A Program; Starting A Firing; Entering/Changing A Firing Curve/Program - Rohde TC 304 Notice D'utilisation

Calling Up a Program

The TC 304 can save up to 5 firing curves i.e. programs. Program numbers 1– 4
are factory-set with standard firing curves and can be modified (see table below).
The pre-set programs are only optional settings and can be adapted according to
the materials that you use.
Prog. Description t0 Rmp1
Nr. (h.min) (°C/h)
01* Initial firing 1050 °C 0 100
02 Bisque 950 °C 0 60
03 Earthenware 1050 °C 0 150
04 Stoneware 1250 °C 0 150
In the following example we will call up program No. 04 to start the firing. After
turning on the TC 304, the display indicates the room temperature. Press the prog
key until the display shows program "P4". The display changes after a few seconds
and shows the respective end temperature of the selected program.

Starting a Firing

Push the "Start / Stop" key to start the program. The display shows the actual kiln
temperature and the green LED on the "Start / Stop" key flashes.
Note: If the kiln cannot follow the required temperature increase programmed
in a controlled ramp up, the controller dwells at the temperature until the kiln
reaches the required setpoint temperature again (the LED above the "Start / Stop"
key flashes orange). As soon as the kiln has reached this temperature, the ramp
up continues. As this process may occur repeatedly, the ramp up can actually
take longer.
* We recommend that you use preset program No. 01 "Initial firing" for the initial firing of your kiln, new
heating elements (oxidation firing) and new furniture material (stilts and batts). Open the air supply and
exhaust air openings during initial firing. Please consult the kiln instruction manual.
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Tmp1 Rmp2 Tmp2 t2 Rmp3
(°C) (°C/h) (°C) (h.min) (°C/h)
1050 SKIP 1050 1.30 SKIP
600 100 950 0.00 SKIP
900 100 1050 0.30 SKIP
900 60 1250 0.05 SKIP

Entering/Changing a Firing Curve/Program

The TC 304 control unit allows precise, reproducible control of your kiln.
You will find a schematic firing curve on the front of the controller. It comprises
different program sections i.e. segments. Each program section is marked with an
abbreviation (t0, Rmp1, Tmp1, Rmp2, Tmp2, t2 and Rmp3) and has a respective
LED indicator.
Use the and arrow key to change
 
between the different program sec-
tions. A flashing LED indicator shows
the program section you have entered.
First decide the location where you
want to save a new program or change
an existing program.
Press the prog key until the required
storage location (1 to 5) appears on
the display. The display changes after a few seconds showing the respective end
temperature (Tmp2) of the selected program. The respective LED flashes in program
section "Tmp2".
Program delay or program start delay: t0
The controller delays the start of the firing process for the time set.
Push the or key until the "t0" LED indicator in the program delay section
 
flashes. The display shows the value that has been stored. Use the  or 
key to enter a value between 0.00 (no delay) and 9.59 (hours.minutes).
Heating rate to 1st switching point: Rmp1
The kiln heats up at the rate set. By default, the rate is entered in degrees Celsius
per hour.
Push the or key until the "Rmp1" LED indicator in the 1st heating ramp
 
program section flashes. The display shows the value that has been stored.
Use the  or  key to enter a value between 1 and 999°C/h or SKIP (heating
at full power).
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