د.نهله

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

 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

fl.oz

Fluid Ounce
16 fl.oz.
0
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
1000 ug
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