Calibration of Hot plate ,Purpose :
Calibration of Hot plate, The purpose of this SOP is to describe the operation, calibration and cleaning of Hotplate with Magnetic Stirrer (Model: Fisherbrand – FB65312).
Calibration of Hot plate, Scope :
This procedure is applicable for Hotplate with Magnetic Stirrer (Model: Fisherbrand – FB65312), installed in the quality control laboratory for general block of XX Pharmaceuticals Limited.
Definitions / Abbreviation:
[][]SOP: Standard Operating Procedure.
[][]QC: Quality Control.
[][]RPM: Rotations per minute.
Responsibilities:
The roles and responsibility is as follows:
Executive, QC
[][]To ensure that the instructions of this procedure are correctly followed.
[][]To ensure cleaning of hotplate maintaining safety rules.
Manager, Quality Control
[][]To ensure that this procedure is kept up to date.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
[][]To arrange training on the SOP to all concerned personnel and to ensure implementation of the SOP after training.
[][]Schedule calibration of the instrument at the defined intervals.
Head of Quality Assurance
[][]To ensure the overall implementation of the SOP.
[][]Approval of the SOP.
Procedure:
Precaution(s):
[][]Laboratory coat and thick rubber gloves must be worn while handling the instrument.
[][]Ensure that the main switch and power supply connector are accessible during use.
[][]Remove the plug from the main socket during cleaning.
[][]Never use sharp objects or harsh or abrasive cleaning agents when cleaning.
[][]Spillage must be cleaned up immediately after use.
[][]Do not heat beakers with any type of liquid adhering to backside.
[][]Never touch the top of the plate when the instrument is on.
[][]Never keep the heater in ‘on’ condition, when not in use.
[][]Do not use hotplate until reported faults are repaired.
Operation:
[][]Ensure the equipment is clean, calibrated and free from any dust particle.
[][]Connect the instrument to the main power supply.
[][]Switch ‘ON’ the mains.
[][]Place the beaker containing the solution in the center of the plate.
[][]For stirring option, immerse the Teflon stirring bar into the solution to be stirred.
[][]Switch ‘ON’ the instrument.
[][]Set the required stirring speed (RPM) of stirring bar by means of speed regulator knob. Turn the speed regulator knob clockwise or counter-clockwise to increase or decrease speed respectively.
[][]After stirring is over, slowly decrease the speed to zero by turn knob counter-clockwise.
[][]For heater, set the temperature by rotating the temperature setting knob to the required. It will take 5 to 10 minutes to stabilize. Turn the knob clock wise to increase the temperature or counter clock wise to decrease the temperature.
[][]After heating is over, decrease the set temperature to zero by turn knob counter-clock wise.
[][]Bright red light will flash until surface cools.
[][]After completion of work, switch ‘OFF’ the instrument.
[][]Switch ‘OFF’ the mains when not required.
Calibration:
[][]Calibrate the hotplate once in a year.
[][]Switch ‘ON’ the mains.
[][]Switch ‘ON’ the instrument.
[][]Set the desired temperature using temperature setting knob.
[][]Check the temperature using a duly calibrated thermometer and record the temperature in the calibration information sheet for hotplate with magnetic stirrer (as per Annexure-I).
[][]When instrument do not complies with the specified limits, label “Out of calibration” and get serviced.
Cleaning procedure:
[][]Switch ‘OFF’ the instrument.
[][]Switch ‘OFF’ the mains.
[][]Ensure that the surface of the plate is in room temperature.
[][]De-dust the instrument with a clean dry cloth every day.
[][]Once in a week wet mop the instrument.
[][]Wet mop using a cloth moistened in mild detergent solution and then wipe with a cloth wetted with water.
[][]Afterwards wipe the surface with a clean dry cloth to remove traces of detergent.
[][]Allow to dry the instrument before using it again.
Annexure
Calibration Information Sheet for Hotplate with Magnetic Stirrer