Calibration; Calibration Group - A&D GX-300 Instruction Manual

8-1 Calibration Group

The GX series balance has the following modes as a calibration group.

Calibration

Calibration test
Correction of the internal mass value
Terms
The following terms are defined as follows:
Internal mass
External weight
Calibration weight =
Target weight
Caution
Calibration adjusts the balance for accurate weighing.
Besides periodic calibration and before each use, perform calibration when:
• the balance is installed for the first time.
• the balance has been moved.
• the ambient environment has changed.
Do not allow vibration or drafts to affect the balance during calibration.
To output the data for GLP using the RS-232C interface, set "GLP output ( info )" of "Data output
( dout )". For details, refer to "10. FUNCTION TABLE". Time and date are added to GLP report. If the
time or date is not correct, adjust them. For details, refer to "10-9 Clock and Calendar Function".
Calibration test is available only when "GLP output ( info )" of "Data output ( dout )" is set to "1" or "2",
The calibration and calibration test data can be stored in memory. To store them, set "Data
memory ( data )" to "3". For details, refer to "12. DATA MEMORY".
Caution on using an external weight
The accuracy of an external weight can influence the accuracy of weighing. Select an
appropriate weight as listed below:
Model
GX-200 200 g, 100 g
GX-300 300 g, 200 g, 100 g
GX-400 400 g, 300 g, 200 g
GX-600 600 g, 500 g, 400 g, 300 g, 200g
GX-800 800 g, 700 g, 600 g, 500 g, 400 g, 300 g, 200g
GX-1000 1000g, 900g, 800 g, 700 g, 600 g, 500 g, 400 g, 300 g, 200g
GX-2000 2000 g, 1000 g
GX-3000 3000 g, 2000 g, 1000 g
GX-4000 4000 g, 3000 g, 2000 g
GX-6100 6000 g, 5000 g, 4000 g, 3000 g, 2000g
GX-6000 6000 g, 5000 g, 4000 g, 3000 g, 2000g
GX-8000 8000 g, 7000 g, 6000 g, 5000 g, 4000 g, 3000g, 2000g
The calibration weight in bold type: factory setting
The calibration weight value can be adjusted within the range above.
Display
8. CALIBRATION
Automatic self calibration (calibration due to changes in temperature
Calibration using the internal mass (one-touch calibration)
Calibration using an external weight
Calibration test using an external weight (Calibration test does not perform calibration.)
= Built-in calibration weight
= A weight that you have. Referred to as a calibration weight when used for calibration.
A weight used for calibration
= An external weight used for calibration test
Usable calibration weight
This indicator means "the balance is measuring calibration data". Do not
allow vibration or drafts to affect the balance while this indicator is displayed.
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Adjustable range
-0.015 g to +0.015 g
-0.15 g to +0.15 g
-1.5 g to +1.5 g