SOP - OPERATION AND CALIBRATION OF MUFFLE FURNACE

1.0 OBJECTIVE

To check the instrument performs satisfactorily and gives accurate temperature.

2.0 SCOPE

This SOP Covers the operation and calibration procedure of Muffle furnace and this SOP is applicable to Quality Control Department.

3.0 RESPONSIBILITY

Officer / Executive

4.0 ACCOUNTABILITY

Department Head.

5.0 PROCEDURE

5.1 CLEANING PROCEDURE

5.1.1 Check that the power supply to the instrument is switched “OFF”.

5.1.2 Ensure that the Muffle Furnace is not in hot condition or in operation while cleaning.

5.1.3 Clean the instrument externally with clean dry cloth.

5.2 OPERATING PROCEDURE

5.2.1 Ensure that the instrument is connected to the power supply.

5.2.2 Switch “ON” the main power supply, glowing of red light at mains indicates the power supply.

5.2.3 Switch on the instrument by ON position which leads to activation of green control bulb and the temperature controller.

5.2.4 Set the temperature required by pressing and holding the red ‘PRESS TO SET’ button and rotate the adjust screw to set the required temperature and release the push button.

5.2.5 The digital display shows the actual temperature of furnace and the red light of the temperature controller glows.

5.2.6 When temperature reaches at the setting point, the red light of temperature controller automatically switched “OFF” and green light will glow. The equipment is now ready for operation.

5.2.7 If any discrepancy observed during operation, inform to maintenance department for rectification.

5.3 CALIBRATION PROCEDURE

5.3.1 Calibration of the temperature will be done through external agency from Calibration Service laboratory.

5.3.2 If any discrepancy observed during operation, stop the instrument and inform to Utility department for rectification and affix “BREAK-DOWN” tag to the instrument .

5.3.3 FREQUENCY OF CALIBRATION
Once a year and after each Maintenance Job.


6.0 REASON FOR REVIEW
First time issue.