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18. Terms/Index
18.1. Terms
Calibration Adjustment of the balance so that it can weigh accurately.
Calibration weight A weight used for calibration
Data number Numbers assigned sequentially when weighing data or unit weight is
stored.
Digit The minimum weighing value available. Used for the balance, one digit
is the smallest mass that can be displayed.
Environment Ambient conditions such as vibration, drafts, temperature, static
electricity and magnetic fields which affect the weighing operation.
External weight The weight that you have.
GLP Good Laboratory Practice.
GMP Good Manufacturing Practice
Internal mass Built-in calibration weight
ISO International Organization for Standardization
Repeatability Variation in measured values obtained when the same mass is placed
and removed repetitively. Usually expressed as a standard deviation.
Example: Standard deviation = 1 digit: This means that measured
values, obtained when the same sample is placed and removed
repetitively, fall within ±1 digit in the frequency of about 68%.
Re-zero To set the display to zero.
Sensitivity drift An affect that a change in temperature causes to the weighing data.
Expressed as a temperature coefficient.
Example: Temperature coefficient = 2 ppm/°C : If a load is 10 g and the
temperature changes by 10°C, the value displayed changes by the
following value.
0.0002%/°C x 10°C x 10g = 0.0002 g
Stabilization time Time required after a sample being placed, until the stabilization
indicator illuminates and the weighing data is displayed.
Tare To cancel the mass value of a container which is not to be included in
the weighing data. Normally, refers to an operation of placing a
container and setting the display to zero.
Target mass An external weight used for calibration test
Zero point A weighing reference point. Usually refers to the value displayed when
nothing is on the weighing pan.