Terms/index, Terms – A&D Weighing BM-20 User Manual
Page 88
86
BM
series
18. Terms/Index
18.1.
Terms
Calibration Adjustment
of the balance so that it can weigh accurately.
Calibration weight
A mass 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
Micro tube
2
and 1.5
micro tubes in the market
can be weighed with the test tube holder that is
an accessory of
BM-20 and BM-22.
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 " means that may occur a weighing error within
±1 digit in the frequency of approx. 68% when weighing the same mass
repeatedly.
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.
0.000
002 ppm/°C x 10 °C x 10
g = 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.
1.5
2
Micro tube
Test tube holder