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 | |
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%. |
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. |
| 80 |