METROLOGY Dr. Nahlah Othman

METROLOGY it is the science of weights and measures. the new definition :metrology is the science of measurement that include all theoretical &practical aspects of measurements .

1-scientific or fundamental metrology: Concern the establishment of quantity systems &units of measurements. 2-applied metrology: Concern the application of measurements science to manufacturing &their use in society. 3-legal metrology : Concern measuring instruments for the protection of health ,environmental &public safety

Medical metrology: Science fields where precision is paramount ,such as medicine, use a wide array of metrology instruments. These instruments include surgical robots, drug delivery monitoring devices ,laser –based medical instruments ,computer-assisted navigational systems, that use a four –dimensional positioning system to help surgeons perform complex operations

Metrology It is the science of weights and measures. Tow types of systems of weights and measures are used in dispensing: 1-Old apothecaries system.  2- The Classical metric system.

apothecaries system. Unit's for measuring solids(weights). Grain (Gr): It is defined as the weight of a grain of wheat and it is equivalent to 0.06 gm. Equivalent Abbreviation Unit's Name Gr Grain 60 Grs dr. Drachm 8 dr. oz. Ounce 12 oz. Ib. Pound

apothecaries system. b. Unit's for measuring liquids. Minim (M): It is defined as the volume corresponding to 0.06 ml. Equivalent Abbreviation Unit's Name M Minim 60 minims fl.dr. Fluid Drachm  8 fl.dr.    fl.oz Fluid Ounce 16 fl.oz. Pint

Metric System Unit's for measuring solids(weights). Grain (Gr): It is defined as the weight of a grain of wheat and it is equivalent to 0.06 gm. Equivalent Abbreviation Unit's Name 1000 ug mg Milligram 1000 mg gm Gram Kg Kilogram

Metric System a. units Of Volume Equivalent Abbreviation Unit's Name 1000 ul ml 1-Milliliter 1000 ml L 2- Litter

Conversion from apothecarie's system to metric system: Unit's for measuring weights. Metric system Apothecarie's system 0.06 gm Gr. 4 gms dr. 30 gms oz.

Conversion from apothecarie's system to metric system: a. units Of Volume Metric system Apothecarie's system 0.06 ml 1-M 4ml 2- fl.dr 30ml 3-fl.oz 500 ml 4- Pint ( 0 )

Conversion from metric system to apothecarie's system: Unit's for measuring weights. apothecarie's system Metric system 15 Gr 1- gm 2.2 Ib 2-Kg

Conversion from metric system to apothecarie's system: a. units Of Volume apothecarie's system Metric system 15 M 1- ml 2 0 2- L

Household measure (domestic measure) apothecarie's system metric system household measure 0.06 ml Drop fl.dr 5 ml Teaspoonful 1/2 fl.oz 15 ml Tablespoonful 1 fl.oz 30 ml Coffee cupful 5 fl.oz 150 ml Teacupful 8 fl.oz 250 ml Glassful Each one ml = 15 drops NOTES