The NI CAL-4353 is a calibration accessory for the NI PXIe-4353 thermocouple input module. It mounts on the front of the NI PXIe-4353 and features connections to input your own calibration source. Use this accessory to verify and adjust the input channels of the NI PXIe-4353 as well as verify the cold-junction compensation (CJC) channels.