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21. TERMS / INDEX
Terms
Stable value
The weight data when the stabilization indicator appears.
Environment
Ambient conditions such as vibration, drafts, temperature, static electricity and
magnetic fields which affect the weighing operation.
Calibration
Adjustment of the balance so that it can weigh accurately.
Output
To output the weight data using the RS-232C serial interface.
Zero point
A weighing reference point or the zero display. Usually refers to the value displayed
when nothing is on the weighing pan.
Digit
Unit of digital resolution. Used for the balance, a unit of minimum weighing value.
Tare
To cancel the weight of a container which is not included in the weight data.
Mode
Balance operational function.
Re-zero
To set the display to zero.
GLP
Good Laboratory Practice.
Repeatability
Variation in measured values obtained when the same weight is placed and removed
repetitively. Usually expressed as a standard deviation.
e.g. Standard deviation=1 digit: This means that measured values fall within
±
1 digit
in the frequency of about 68%.
Stabilization time
Time required after a sample being placed, until the stabilization indicator illuminates
and the weight data is displayed.
Sensitivity drift
An affect that a change in temperature causes to the weight data. Expressed as
temperature coefficient.
e.g. Temperature coefficient = 2 ppm/
°
C : If a load is 300 g and the temperature
changes by 10
°
C, the value displayed changes by the following value.
0.0002%/
°
C x 10
°
C x 300 g = 6 mg
IP65
IP code: Degree of protection provided by enclosures.
6: Dust-tight. No ingress of dust. 5: Protect against water jets.
