Converting Watlow 0-24V controller output to 0-10V for a NI fieldpoint data acq
According to the quick start guide I see (and which you should have linked) the process output is either 0-10V or 4-20mA current loop. 



So if you configure it for 0-10V rather than the current loop you should not have to do anything else. 

Do keep in mind that if your thermocouple is grounded-junction, an inexpensive instrument like this one (which does not appear from my brief review of the datasheet to have galvanic isolation) together with a data acquisition system which has a ground as well - the system will not likely work properly.