What is the sensitivity requirement of a Class A balance?
6 mgThe sensitivity requirement or limit of a Class A balance is defined as a pointer shift of not less than one index-scale division when 6 mg has been added to a pan.
What is the sensitivity of a counterbalance?
It has a sensitivity requirement in the range of +/-100 mg. Because of its reduced sensitivity, a counterbalance is not used in prescription compounding but rather for tasks such as measuring bulk products (e.g., Epsom salts).
What is the sensitivity requirement of a Class 3 torsion balance?
The Torsion Balance is entirely manufactured in the United States with highest quality parts. All components of the torsion balance are manufactured from highest grade metals such as brass, and stainless steel. Unique torsion bands deliver 0.002g (2mg) sensitivity with a 60g weighing capacity.
What is the weight limit of a Class A balance?
Class A prescription balance this balance, the pharmacist should not weigh less than 120 milligrams of material (i.e., a 5% error in a weighing of 120 milligrams = 6 milligrams). Most commercially available Class A balances have a maximum capacity of 120 grams.
What is a Class A prescription balance?
Class A Prescription Balance— A balance that meets the tests for this type of balance has a sensitivity requirement of 6 mg or less with no load and with a load of 10 g on each pan. The Class A balance should be used for all the weighing operations required in prescription compounding.
How do you calculate sensitivity requirement?
4:227:18Video 5 Sensitivity Requirement Test - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe sensitivity requirement can be determined by solving the equation of the line for X by assigningMoreThe sensitivity requirement can be determined by solving the equation of the line for X by assigning y equals 1 which stands for one division.
What is the minimum weight a Class III balance is calibrated to?
0.1 to 0.01 gramsModerate precision balances, or those with readability from 0.1 to 0.01 grams, generally require an ASTM Class 3 calibration weight. These types of scales, like the Ohaus Adventurer AX2202N/E, are commonly found in commercial laboratory environments.
Why are Class A balances not used for very small amounts?
Why are class A balances not used for very small amounts? Class A scales have a minimum weighable quantity of 120mg of material with a 5% error.
How does a torsion balance work?
The torsion balance consists essentially of two small masses at different elevations that are supported at opposite ends of a beam. The latter is suspended from a wire that undergoes torsion because the masses are affected differently by the force of gravity.
When using a class A torsion balance do you weigh Tylenol powder?
When using a Class A Torsion balance to weigh Acetaminophen powder: The weight goes on the right pan and the powder goes on the left pan. The AWP for a drug is $33.50 with a 15% discount from the wholesaler.
How do you find the minimum capacity of a weighing balance?
1% = 0.01 mg least count balance. It shows that if you have a balance with least count 0.01 mg, you can weigh minimum 10 mg sample on it. Other weights can be calculated accordingly. Update: Simply you can calculate the minimum limit by multiplying least count by 1000.
How much can a truck driver weigh?
General Rule. 35550. (a) The gross weight on any one axle shall not exceed 20,000 pounds, and the gross weight upon any one wheel, or wheels, supporting one end of an axle, shall not exceed 10,500 pounds.
When would you use a Class A torsion balance quizlet?
When using a Class A Torsion balance to weigh Acetaminophen powder: The weight goes on the right pan and the powder goes on the left pan. The AWP for a drug is $33.50 with a 15% discount from the wholesaler.
What type of balance do pharmacies use?
The Class A Prescription Balance is the balance most commonly used by pharmacists; in fact, all pharmacies are required by law to have one in the prescription deparhnent.
Which balance is easiest to use and most accurate quizlet?
8 is the official powder size for coarse powders. Which balance is easiest to use and most accurate? Electronic digital balance.
How do you find the least Weighable amount?
Terms in this set (10)single ingredient or a mixture which does not contain any active drug. ... must be done last (can only be done last) ... LWQ = (100% x sensitivity requirement (SR)) / (acceptable error %) ... variation on percent of error equation: ... mass of the drug that is weighed. ... - use MWQ/LWQ method to find LWQ (mg)More items...