Place a drop of urine on the aperture and press start. The
result will be displayed to within +10 mOsmols kg
H2O immediately. An excess of urine will not interfere
with the results and the measuring surface may be safely run under
a tap to clean it.
Osmocheck measures refractive index which is directly related to
specific gravity and only indirectly related to Osmolality. For
true Osmolality results an Osmometer, such as the Advanced
Micro Osmometer, model 3320, should be used.