Specifications
BM series 89
19. Terms/Index
19.1. 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