PROCEDURE
- Take out the force gauge to be calibrated and hold vertically up.
- Adjust the zero on the force gauge.
- Standard Weights are then applied to the hook of force gauge and measure the tension of the spring on the force gauge.
- When 1 kg of standard weight is applied, scale on the force gauge should also show 1 kg tension produced from the initial point where the pointer is adjusted.
- Adjust the zero on the force gauge again.
- Follow the same procedure for other weights.
- The test to be carried out for 1.0 kg, 2.0 kg, 5.0 kg, 10.0 kg, 20.0 kg & 30.0 kg standard weights.
Frequency: Once in 6 months.
Maintenance / Repair: When the instrument does not comply with the requirement specified above; the instrument should be labeled as “Out of Calibration” and should get repaired/ serviced.
After repairing/ servicing the instrument before taking for use, the instrument must be calibrated as per the above-mentioned procedure.
QUALITY ASSURANCE DEPARTMENT
CALIBRATION REPORT OF HARDNESS TESTER
Reference –
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Date -
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Frequency -
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Instrument No.
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Make –
| Model – | ||||||||
| CALIBRATION OF FORCE GAUGE : Hold vertically up the force gauge to be calibrated. Adjust the zero on the force gauge. Apply the standard weights to the hook of force gauge and measure the tension of the spring on the force gauge. | |||||||||
| Sr. No. | Weight Applied (kg) | Initial Reading on Force Gauge | Final Reading on Force Gauge | Difference | |||||
1
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1.0
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2
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2.0
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3
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5.0
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4
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10.0
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5
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20.0
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6
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30.0
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Next Calibration Due On :
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Done By :
Date :
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Checked By :
Date :
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