Which kit do you have? It usualy depends on the amount of water and amount of testing solution you used. Some kits have both a low resolution mode (does more tests) or a high resolution one, or in this case two ranges.
55g reef, 2x250W 10k MH
+ 2x96W PC
actninc, 10g sump, AquaC Urchin skimmer, 65lbs LR
xenia, mushrooms, wels. open brain, fungia radiata (orange), green eyed zoos
flame angel, mated pair of false perc, 6-line, firefish
20gH electric yellow cichlid