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Program Controller SE-707
© 2018 by STANGE Elektronik GmbH
148
Subject to technical modifications
8.3.4 Special Functions
8.3.4.1 C-Level (Option)
Optional function block for C-level calculation and control for gas
carburizing furnaces. This option must be especially released via
licence entry in the device license file (C:\SE_SYST.LIC).
The SE-707can be used for tempering work pieces in connection
with a heat treatment furnace.
Temperature and furnace atmosphere are controlled by using a
special formula for carbon calculation.
•
Inputs for temperature, CO, CO
2
and O
2
•
Consideration of correction values
•
Choice between endogas and direct gassing
Calculation example:
O
2
formula
: CO= 20%, T= 930°C, O
2
= 1173mV
C-level = 1.269%
CO
2
formula
: CO= 20%, T= 900°C, CO
2
= 0.5%
C-level = 0.3475%