uncertReading {masscor}

Uncertainty of balance readings

Description

Uncertainty in a given balance reading considering the effects of rounding error, lack of repeatability, eccentricity and balance taring.

Usage

uncertReading(calibCert, reading, units = NULL, sd = NULL,
  sd.units = NULL, d = NULL, d.units = NULL)

Arguments

calibCert

object of class "calibCert" with the calibration data of the balance. See calibCert() for details.

reading

numeric with balance reading for the mass of the object.

units

character with the units of reading. Must be a SI unit. If not provided, the balance standard units are assumed. See calibCert() for details.

sd

standard deviation when a balance reading is the result of averaging several individual measurements of same object. If not provided the information is taken from the calibration certificate of the balance

sd.units

character with the units of standard deviation. If not provided, the value stated at units or the balance standard units is used.

d

balance division scale. Useful when the balance is operated a a division scale different from that stated in the calibration certificate. This is the common case when the user is give up some readability in order to make faster mass measurements. If not provided. the functions uses the balance division scale stated in the calibration certificate.

d.units

character with the units of parameter d. If not provided, the value stated at units or the balance standard units is used.

Value

A numeric value of uncertainty for a balance reading.

See Also

uncertErrorCorr(), uncertConvMass()

Examples

data(minimalCert)
uncertReading(calibCert = minimalCert, reading = 12.4835)
uncertReading(calibCert = minimalCert, reading = 12.484, d = 1, d.units = 'mg')