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23. 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.
GMP
Good Manufacturing 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 200 g and the temperature
changes by 10
°
C, the value displayed changes by the following value.
0.0002%/
°
C x 10
°
C x 200 g = 4 mg
Summary of Contents for HR-250AZ
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