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.

 

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A&D GH-120/GH-200/GH-300/GH-202/GH-252 manual Terms/Index