A&D GR Series GR-300 - Manual (Page 22)

This function tests the balance accuracy using the internal weight.
Operation
Step 1 Connect the AC adapter and warm up the balance
for at least one hour with nothing on the pan.
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Step 2 Press and hold the CAL key until display-
and then release the key.
Press and hold the key/C
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-Release the key
Step 3 The balance measures the zero point.
Prevent vibration and drafts to affect the balance.
Step 4 The measured zero point data is displayed.
Step 5 Ready for the internal weight measurement.
Step 6 The balance measures the internal weight.
Prevent vibration and drafts to affect the balance.
Step 7 The internal weight data is displayed.
Step 8 The balance informs you when the calibration test
is finished. If the "CLP output ( ,n/-o)" of fh®
"Function Table" is set to " /" or
" P " , "Calibration
Test Report" is output by the RS-232C interface.
Step 9 Thebalancewill automatically return to the weigh­
ing mode after the calibration test is finished.
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GLP output
CalibrationTest Report^
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Adapting to environment page 21 7, Calibration