THCAD 10 question

I have a Mesa 7i96s card with a THCAD - 10. Do I need a voltage divider for this? I purchased two resistors - 2.4M OHM 1/2W 1% AXIA ( digikey ) as well as a 50:1 voltage divider ( CNCpc ). Do I need both? 

I wouldn't use the 50:1 voltage divider. a THCAD5 with a 5 volt full scale would be more suited to use with it. Instead just calibrate the THCAD to read 200 to 300 volts full scale with a resistor.

Would the resistor I have listed work for the THCAD to read the voltage?

One 2.4M resistor in series to the negative lead will give you a 250V full scale range
which should be OK

Thank you for the info