JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 100)

9 Setup program 2014-05-01 100
9.3 Forgotten the code?
If you forget the code, it can be read out via the USB interface and the setup program.
h Perform a data transfer

read-out from device.
The read-out code now appears in the setup program.
It can be retained or changed.
If "0" is set and transferred to the device, the code interrogation is deactivated and the configuration level is freely accessible.
9.4 Special function: thermocouple reverse polarity protection
If a thermocouple is incorrectly connected (reverse polarity), in-
correct measured values will be displayed, e.g. negative tem-
peratures instead of the expected positive temperatures may
be displayed.
This may lead to the set limit value never being reached. An ad-
ditional limit value will be defined that is factory set to -205 °C
and the relay alarm will be triggered if the actual value falls be-
low this limit.
This value must be effectively selected to ensure that a possi-
ble reverse polarity is detected.