SOP on Calibration of Muffle Furnace

Calibration of Muffle Furnace


Calibration of Muffle Furnace

1.0  PURPOSE   

The purpose of the standard operating procedure is to provide guidelines for calibration of Muffle Furnace.


The scope of this standard operating procedure includes calibration of Muffle Furnace.


3.1    Section Incharge

3.2    Technical Manager

3.3    Q.A. Manager


4.1   Switch on the instrument.

4.2   Ensure that the temperature indicator/controller is in working condition i.e. the set temperature should be maintained / retained properly.

4.3   Ensure that the door of laboratory oven is properly closed and does not loosen during operation.

4.4   Ascertain and set the points/points at which calibration is required.

4.5  Switch on the laboratory oven and allow it to reach the set point temperature.

4.6   Apparatus Required For Calibration: Platinum resistance thermometer with sensor and digital temperature indicator.


4.7.1 Insert the sensor of the reference/calibrator sensor (PRT) in the laboratory oven as near as possible to the sensing tip or sensor of the temperature controller/indicator of the laboratory oven.

When the temperature is stable note down the temperature reading as indicated by on the laboratory oven and the reference indicator simultaneously.

4.7.2    Take at least three to four readings for better accuracy and reproducibility.

4.7.3    Set the next point and record the temperature readings accordingly.

4.7.4   Correlate the readings observed with the reference standards and apply corrections, if necessary.

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