- 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.
- Cleaning procedure:
- List of Annexures / Formats
- ‘Not Applicable’
- References (if any).
- In- house.
- Reason for Revision
- ‘Not Applicable’
