Dekema AUSTROMAT 624, Operating Instructions Manual

Page: 130 / 155

7. Maintenance and Service AUSTROMAT
®
624 / 644
130 Operating Instructions (Version 01/2012)
7.2. Calibrate temperature
NOTE:
Before each maintenance and service task: Read section 2, Safety. In particular, be aware
of the hazards listed in section 2.4.
A number of factors influence the temperature of the firing object. These can include: The color
and shape of the firing tray, or the number and type of firing objects. Other major influences can
be age-related effects such as heating element wear and changes to the thermoelectric
properties of the temperature sensor. We therefore recommend calibrating the temperature of
the firing furnace to adapt these factors and achieve the desired firing results. Calibrate the
temperature whenever the firing results are inconsistent and at least once annually. Calibration
is carried out by means of the calibration factor (CCF) . Observe the following instructions:
• For new furnaces, we recommend that you calibrate the temperature for the first time after
approximately six months.
•
An internal monitoring program notifies you when you should calibrate the firing furnace
temperature.
•
Make sure that the heating element and thermocouple are not damaged.
• Only use the DEKEMA calibration set that is for the specific furnace. This consists of a
curved silver wire and a white ceramic firing tray.
•
For calibration, always use the insulation table, even with the 644 pressing furnace!
•
Make sure that the temperatures of all the firing programs are adjusted when the CCF
value changes. The firing temperatures of individual programs may have to be corrected.
Calibrating the temperature with the calibration set:
1. The firing furnace must be thoroughly preheated before calibrating. The thermocouple must
be preconditioned. Therefore perform a cleaning firing before calibrating the temperature.
•
In the "Setup" menu, select the program "Cleaning firing", and press [Start] (see
section 0).
• Rule of thumb: The side walls of the top oven housing must be warm to the touch.
2. Insert the bent silver wire (silver sample) from the calibration set in the middle of the firing
tray (see the following illustration). Place the firing tray on the insulation table.