Mettler Toledo GA42 Operations Instructions download pdf (Page 10)

2.4 Calibration (adjusting)

To obtain accurate weighing results, the balance must be matched to the acceleration due to gravity at its location.

Calibration is necessary

• before the balance is used for the first time,

• at regular intervals during weighing operations,

• after a change in location.

Procedure

To obtain accurate results, the balance must be connected to the power supply and allowed to warm up to the

operating temperature for 20–30 minutes before calibration.

➞ Have required calibration weight ready (section 5.1).

➞ Unload weighing pan.

➞ Press and hold

Cal

until "CAL" appears in the display, release key.

➞ The required calibration weight value flashes in the display.

➞ Place calibration weight in center of pan. The balance calibrates itself.

➞ When "0.00" flashes, remove calibration weight.

The calibration (adjustment) is finished when "0.00 g" appears in the display. The balance is again in the

weighing mode and ready for operation.

Note

• With certified balances, the calibration can be disabled after installation if required by the national certification

regulations.

• The adjustment can be terminated at any time using the

key. The following message appears:

Abort.

CAL

------

2000.00

------

0.00

------

CAL donE

Cal/Menu

0.00

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Mettler Toledo GA42 Operations Instructions Page 10