measuring analog current output with beaglebone
Sounds like it would work. Since the maximum load as given in the spec sheet is 500 Ω, something about 20% of that should work.

So, there's the E-series of preferred numbers, and easily available resistors usually are in that. In your case, something close to, but a little less then 90 Ω would be perfect – so maybe 82 Ω, but more likely the common 68 Ω value. Make sure to buy resistors with a low tolerance!