5.1 |
Safety Precautions/Instructions: |
5.1.1 |
Ensure all the electrical connections are properly earthed. Ensure the power plug of the Bursting Strength Apparatus is fixed in the socket properly. |
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5.1.2 |
Wear personal protective equipments such as safety glasses during operation of instrument. |
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5.1.3 |
Ensure that the ON/OFF switch is working properly by switching “ON” the Bursting Strength Apparatus. |
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5.2 |
Operation Procedure: |
5.2.1 |
Check the validity of Calibration before starting any operations. |
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5.2.2 |
Introduction to the Keys:
MAIN ON: ON/OFF switch.
PUSH FOR BRUST: Press button to apply pressure for bursting.
GAUGE I (Left side): To select the pressure gauge 0 to 8.0 kg/cm2.
GAUGE II (Right side): To select the pressure gauge 0 to 40.0 kg/cm2. |
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5.2.3 |
Switch ON the main switch and “MAINS ON” switch of the instrument. |
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5.2.4 |
Raise the tripod and upper clamping by rotating clamp wheel. |
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5.2.5 |
Place the representative sample of the material to be analysed over the diaphragm between the upper and lower clamping plates. |
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5.2.6 |
Lower the tripod plate applying sufficient clamping pressure to prevent slip of the sample between lower and upper clamping plates during analysis. |
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5.2.7 |
While analysing corrugated board, it is recommended that tripod plate be lowered to position where it rests on top of the sample. |
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5.2.8 |
Select the GAUGE I or GAUGE II depending up on the strength of sample by moving the lever. |
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5.2.9 |
If bursting strength of the sample is below 8.0 kg/cm2, then turn the lever to GAUGE I. |
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5.2.10 |
If bursting strength of the sample is above 8.0kg/cm2, then turn the lever to GAUGE II. |
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5.2.11 |
Set the needle pointer of the gauge at zero position. |
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5.2.12 |
Push the “PUSH FOR BURST” button and keep it pressed so that plunger will start rotating in clock wise direction at constant speed till sample bursts. |
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5.2.13 |
Release pressed push button as soon as the sample bursts. |
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5.2.14 |
Record the bursting strength at which the needle pointer on the gauge stops when the sample bursts. |
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5.2.15 |
This will automatically reverse the direction of plunger, and it will come and stop to its starting position. |
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5.2.16 |
The motor will stop at this position. |
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5.2.17 |
Update the “Instrument/Equipment Usage Log Book” as per SOP No. QC/009 “Calibration of Instruments and Equipments”. |
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5.3 |
Cleaning Procedure: |
5.3.1 |
After completion of the test clean the plunger with lint free nylon cloth. |
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5.4 |
Calibration Procedure: |
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Frequency: 1) Once in a year by external agency. |
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2) In-house calibration to be performed half yearly or after carrying out any major maintenance work. |
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5.4.1 |
For external calibration refer Annexure for calibration test to be performed and acceptance criteria.
Sr. No. |
Tests |
Set value |
Acceptance Criteria |
1. |
Pressure Verification of Pressure
Gauge – Ι
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0.0 Kg/cm2 |
± 2 % |
2.0 Kg/cm2 |
± 2 % |
4.0 Kg/cm2 |
± 2 % |
6.0 Kg/cm2 |
± 2 % |
8.0 Kg/cm2 |
± 2 % |
2. |
Pressure Verification of Pressure
Gauge – ΙΙ
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0.0 Kg/cm2 |
± 2 % |
10.0 Kg/cm2 |
± 2 % |
20.0 Kg/cm2 |
± 2 % |
30.0 Kg/cm2 |
± 2 % |
40.0 Kg/cm2 |
± 2 % |
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5.4.2 |
Generate the A. R. No. on the “Instrument/Equipment Calibration Register” as per SOP and give requisition to QA department for calibration formats of instruments on the due date of calibration. |
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5.4.3 |
For issuance of calibration report refer QA SOP “Control of documents, Preparation, Approval, Issuance and Maintenance. |
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5.4.4 |
Perform the Inhouse calibration of instrument as per Annexure and procedure mentioned below. |
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5.4.5 |
Calibration of bursting strength is performed by standard aluminium foil. |
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5.4.6 |
Repeat the procedure from point 5.2.5 to point 5.2.16. |
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5.4.7 |
Enter the details in calibration report as per Annexure. Ensure that the results obtained, comply with the acceptance criteria.
Sr. No. |
Parameters |
Acceptance Criteria
(As per Supplier Specification) |
Observed Values |
Complies / Does Not Complies |
1. |
Bursting Strength of
Standard Aluminium foil |
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5.4.8 |
Update the “Instrument/Equipment Usage Log Book” as per SOP “Calibration of Instruments and Equipments”. |
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5.4.9 |
Affix the “Calibration Status Label” on the Instrument as per SOP “Calibration of Instruments and Equipments”. |
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5.4.10 |
If calibration activity is outsourced, the values are to be transcribed in the Annexure, and external party certificate to be attached. |
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5.5 |
Preventive Maintenance : |
5.5.1 |
Perform the preventive maintenance and record in Annexure. |
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5.5.2 |
If preventive maintenance activity is outsourced, the observations are to be transcribed in the Annexure and external party certificate to be attached. |
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5.5.3 |
If any breakdown occurs, follow procedure as per “Calibration of Instruments and Equipments”. |
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