SOP on cleaning and operating procedure of bursting strength tester

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  • Objective:
    • To lay down the cleaning & operating procedure of bursting strength tester.
  • Scope:
    • This SOP is applicable for the cleaning & operating procedure of bursting strength tester in quality control laboratory.
  • Responsibilities:
    • Chemist or above of QC laboratory in Packaging material Quality Control section is responsible for carrying out the cleaning & analysis as per the procedure & interpretation of the results obtained.
  • Accountability:
    • Head – Quality control.
  • Procedure:
    • Cleaning procedure:
      • Switch off power supply of the equipment before cleaning. Clean the equipment with a dry cloth every day.
      • If necessary wet cloth shall be used for effective cleaning it shall be dried immediately using a dry cloth.
      • Do not use any solvent or strong cleaner to clean the equipment.
      • Maintain a cleaning record.
    • Operating Procedure:
      • Test should be carried out at room temperature i.e. at 25 ± 2 ºc.Sample should not be less than 152 mm wide and of sufficient length to permit a total of 20 bursts.
      • Place the sample to be tested over the diaphragm.
      • Switch on the mains, and then switch on the red mains switch located on the control panel.The red switch will be glow up.
      • Rotate the clamping wheel anti-clockwise.
      • Insert the sample specimen between the fixed plate and the claming plate.
      • Rotate the clamping wheel clockwise.
      • The clamps should be tight enough to avoid slippage of sample during testing but at the same time should not crush the entire flute structure.
      • Select the dial gauge with the help of direction valve as per requirement of capacity for specimen to be tested.
      • Rotate the zero knob provided on the centre of the dial gauge antilockwise.This will bring the red pointer very close to the black pointer.
      • Press (and hold) the green start button so that the diaphragm will raise because of the hydraulic pressure.
      • As soon as the sample bursts, release the green / start button to stop the machine.
      • Now press (and hold) the Red / Reverse button till the black needle almost reaches 0 on the dial. Release the red / reverse button to stop.
      • The black pointer has come down with the pressure but the red pointer is still indicating maximum pressure at burst point.
      • Note down the gauge reading in analytical test report as bursting strength which is indicated by the red pointer ( Maximum pressure at burst point ).
      • Remove the tested sample by rotating the clamp wheel in anti-clock wise direction and then fix a new sample.
      • Test all sample in the above manner.
      • Note down the reading, and calculate the maximum ,minimum and average value of Bursting Strength.
      • Then take the dial indicator at zero position and switch off the mains.
  • List of Annexures / Formats
    • ‘Not Applicable’ 
  • References (if any).
  • In- house.
  • Reason for Revision
  •  ‘Not Applicable’

 

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