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SOP for Calibration of AUW 220 Analytical Balance

OBJECTIVE
To lay down a procedure for Calibration of the AUW 220 Analytical Balance.

SCOPE
This procedure applies to the pharmaceutical manufacturing facilities of XYZ Limited.

RESPONSIBILITY
The Quality Control Chemist is responsible for implementation of the process.
The Quality Control Manager is responsible for the execution of the procedure.


PROCEDURE

Span calibration with external weights.
  • Press the CAL key repeatedly from the mass display and when 'Func. SEL' appears, press the 'O/T' key to display 'CAL'.
  • Press the O/T key. The display shows 'E-CAL'.
  • While 'E-CAL' is shown, press the 'O/T' key. Span calibration begins and the zero display blinks.
  • Recheck that there is nothing on the pan and press the 'O/T' key
  • The set weight value appears blinking.
  • Place the weight indicated on the pan. Wait until the blinking zero display reappears. (It may take about 30 seconds).
  • Remove the weight. After 'CAL END' appears for several seconds, the display returns to the mass display and the span calibration is complete.

Calibration test with external weights
  • Press the 'CAL' key repeatedly from the mass display and when 'FUNC.SEL' appears, press the 'O/T' key to display 'CAL'.
  • Press the Off key. The display shows 'E-CAL'.
  • Press the 'CAL'. key repeatedly until the display shows 'E-TEST'. Then press the 'O/T' key.
  • The calibration test begins and the zero display blinks.
  • Recheck that there is nothing on the pan and press the 'O/T' key
  • The set weight value appears blinking.
  • Place the weight indicated on the pan. Wait until the blinking zero display reappears. (It may take about 30 seconds).
  • Remove the weight. The display shows the drift from the previous span calibration for several seconds. The after 'TEST End' appears for several seconds, the display returns to the mass display and the calibration test is complete.

REFERENCE
Nil.


ABBREVIATION
SOP : Standard Operating Procedure
Q.A : Quality Assurance
No. : Number
Q.C : Quality control

ANNEXURE
Annexure : Calibration of the AUW 220 Analytical balance.

REVISION HISTORY
Nil

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