SOP for Calibration of Electronic Balance

OBJECTIVE

To provide a procedure for calibrating the electronic balance.

SCOPE

It covers the procedure for the calibration of the electronic balance in IPQC.

RESPONSIBILITY

Production chemist, Production Executive, Production Manager.

PROCEDURE

• Keep the instrument in a clean and proper place.
• Ensure that the instrument is clean and free from any vibration, air thrust, dust particles and or moisture.
• Switch on the mains.
• At no load position ascertain that it is indicating ‘ZERO’. In case of deviation adjust the zero setting device and eliminate the deviation.
• Ensure that there is no rapid change in the temperature of the surroundings.
• Check that the electronic connections are okay and properly secured.
• Check the display of the weights against the standard weights & record the readings in the chart.
• Limit of Accuracy should be within + 0.1% of the individual weights.
• In case of any variation observed, maintenance, servicing or repair is done by consulting with Seniors.

• Following servicing, rechecks must be carried out till satisfactory results are obtained.
• Do not add any weight, more than the capacity of the instrument.

PRECAUTION

To weigh, place the material in the center of the platform & note the digital display.

RECORDS / SPECIMEN

Record the results in the Calibration record

FREQUENCY

Daily.

MAINTENANCE / REPAIRS

If the instrument does not produce the required results or its response is poor then it should be Labeled “FAULTY” and should be repaired or serviced.

REVISION HISTORY

Nil

ALSO READ: Installation Qualification for Analytical Balance (Shimadzu, AUW220D)