Advantech ADAM-5511 Manual page 120

Span Calibration:
(1). Click the Execute button.
CJC Calibration:
(1). Prepare a voltage source which is accurate to the mV level.
(2). Run the zero calibration and span calibration function.
(3). Use a temperature emulation device (such as Micro-10) to send a
temperature signal to the ADAM module and then compare this
signal with the reading from the ADAM module. If the reading
value is different from the signal, adjust the CJC value to improve it.
Note: CJC (cold junction sensor) calibration only applies to
the ADAM 4011, 4011D, 4018, 4018M, 5018