It only does TC? So it's an OTO test where you compare shades of yellow? Or is it a DPD test where you compare shades of pink? If it's the latter, then that should be fine since it should measure Free Chlorine (FC) and Total Chlorine (TC) where Combined Chlorine (CC) = TC - FC. The key is FC.

If your kit doesn't measure FC, then if you can't wait for your good test kit, see if you can get the cheapest chlorine test kit that is DPD and says it measures both Free and Total Chlorine -- especially Free Chlorine.