A&D GR Series GR-300 - Manual (Page 19)

7. Calibration
Calibration Group
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The GR series has the following modes concerning calibration and calibra­
tion test.
Automatic Self Calibration
Calibration using the internal weight
Calibration using an external weight
Calibration test using the internal weight
Calibration test using an external weight
Correction of the internal weight value
Note
□ Calibration is controlled by the parameters of "Permission or prohibition".
Refer to section "8. Function Switch and Initialization".
□ The weight which can be used for calibration is called "the calibration
weight". The weight which can be used for calibration test is called "the
target weight". The weight which you have is called "the external weight".
Caution
□ This calibration achieves the adjustment for accurate weighing. It is
necessary to perform calibration in the following case.
• When the balance is installed for the first time.
• When the balance has been moved.
• When the ambient environment has changed.
• For periodical calibration.
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Prevent vibration, drafts, and ambient temperature changes from the
influence for the balance during calibration.
This indicator means "the balance is measuring calibra­
tion data". Do not allow vibration or drafts to affect the
balance while this indicator is displayed.
The data for CLP (Good Laboratory Practice) can be output using the RS-
232C interface, when the "CLP output (,F
q
)" of "Data output {do u b)" is
set to " /" o r R e f e r to section "9. Function table".
Caution using an External Weight
□ The accuracy of an external weight can influence the accuracy of weighing.
Product Usable external weight Adjustable range
GR-120 lOOg, 50g
GR-200 200g,lOOg +15.9 mg ~ -15.0 mg
GR-300 200g, 300g
GR-202 200g, 100g
7. Calibration Page 18 Adapting to environment