Calibration; Calibration Mode - A&D HR-250AZ Instruction Manual

8-1 Calibration Mode

The balance has the following modes.
Calibration using the internal mass (One-touch calibration, only for the HR-AZ series)
Calibration using an external weight
Calibration test using an external weight (Calibration test does not perform calibration.)
Terms
The following terms are defined as follows:
External weight =
Calibration weight =
Target weight =
Caution
When calibrating, be sure to install the provided large breeze break.
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 GLP/GMP compliant report using the RS-232C serial interface, set "GLP output
( info )" of "Data output ( dout )". For details, refer to "10. FUNCTION TABLE". To display the
GLP output, a printer or personal computer is required.
Calibration test is available only when "GLP output ( info )" of "Data output ( dout )" is set to "1" or "2".
Caution on using an external weight
The accuracy of an external weight will influence the accuracy of weighing. Select an
appropriate weight as listed below:
Model
HR-250AZ / HR-250A
HR-251AZ / HR-251A
HR-150AZ / HR-150A
HR-100AZ / HR-100A
The calibration weight in bold type: factory setting
The calibration weight value can be adjusted within the range above.
Display

8. CALIBRATION

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
250 g, 200 g, 100 g, 50 g
250 g, 200 g, 100 g, 50 g, 20 g
150 g, 100 g, 50 g
100 g, 50 g
This indicator means "the balance is measuring calibration data".
Do not allow vibration or drafts to affect the balance while this
indicator is displayed.
26
Adjustable range
-0.0150 g to +0.0150 g