Operation and Calibration of Hot Air Oven SOP

By / Quality control / QC, SOP /

SOP for operation and calibration of Hot air oven

  • SOP covers below points :
    • Operation
    • Calibration
    • Calibration Annexures
1.0 OBJECTIVE :
  • To provide a procedure for Operation and Calibration of Hot Air Oven.
2.0 SCOPE :
  • This procedure is applicable to Expo-Hi Tech Hot Air Oven.
3.0 RESPONSIBILITY :
  • Quality control Chemist and above
4.0 ACCOUNTABILITY:
  • Quality Control Head
5.0 PROCEDURE :

Hot air oven are electrical device which use for drying. An air circulating fan helps for uniform distribution of the heat in oven.

5.1 OPERATION

  • Switch “ON” the main supply.
  • Electronic temperature controller displays the chamber temperature.
  • Set the required temperature by pushing the “SET” switch and first knob (COARSE) clockwise or anticlockwise until the temperature comes near to set one.
  • Set the temperature with the help of second knob (FINE).
  • Release the push switch.
  • Indicator bulb glows indicates that the power to the heater is ‘ON’.
  • Switch ‘ON’ the FAN switch for air circulation.
  • Use rotary switch for precise control of temperature.
  • Four position of rotary switch is available as follows,
    • 0 – off position
    • 1 – 5°C above ambient to 90°C
    • 2 – 90°C to 150°C
    • 3 – 150°C to 250°C
  • Keep the switch on suitable marking as per requirement of temperature.

5.2 CALIBRATION

  • For the calibration of hot air oven use two standard thermometer (range: 0°C to 150°C).
  • Set the oven at a temperature 50°C as per operation procedure.
  • Put the Calibrated thermometer for 30 minutes in upper shelf and lower shelf of oven and close the door of oven.
  • After 30 minutes open the door of oven and carefully read the temperature on Calibrated thermometers randomly.
  • Record the observed temperature in format- Calibration of hot air oven (Annexure No. 01).
  • Again Set the oven at a temperature 100°C as per operation procedure.
  • Repeat the above procedure with 100°C and again record the observed temperature in calibration record of hot air oven as per annexure attached.
  • ACCEPTANCE CRITERIA: The observed temperature of thermometer in both shelves should be within + 2.0°C to the set temperature value.
  • FREQUENCY : Quarterly
 6.0 ABBREVIATIONS:
AbbreviationExpanded form
°CDegree Celsius
min.Minutes

7.0 ANNEXURES:
Annex. No.              Title
01Calibration of Hot Air Oven

8.0 SOP REFERENCES
  • Hot Air Oven manual

END OF THE SOP

ANNEXURES :

Annex. No. 01 Calibration of Hot Air Oven