- OBJECTIVE
- To lay down a procedure for Calibration of Disintegration test apparatus
- SCOPE
- This Standard Operating Procedure (SOP) is applicable to DT apparatus placed in IPQC lab and in Quality Control.
- RESPONSIBILITY
- IPQA / Production Executive / Officer
- ACCOUNTABILITY
- Head–Quality Assurance
- PROCEDURE
- Check the water level in the water bath.
- Fill the water in the beakers up to required mark.
- Operate the DT (Disintegration Test) machine
- Adjust if necessary the volume of the water in the beakers such that the wire mesh at the highest point is at least 25mm below the surface of water and at its lowest point is at least 25mm above the bottom of water.
- Count the cycles of up & down of the basket assembly per minute using a calibrated stop watch.
- Repeat the same procedure thrice
- Cycles per minutes should be 28 to 32.
- Set the temperature at 37 °C.
- Check the temperature of water in the beaker and wait till temperature is 37°c ± 2°c.
- Measure the temperature of water in the beaker using calibrated thermometer, after every 30 minutes up to 120 minutes.
- Set the timer at 10,30,45 and 60 minutes respectively
- Check the time after every timer using calibrated stopwatch
- FOR WIRE MESH CALIBRATION
- Use calibrated Vernier caliper for measuring the aperture size.
- Check randomly at least one aperture from each tube and note down the observation in calibration format.
- Check the diameter of wire selected at least one number from all the tubes.
- Check & observed that there is no loose end in any of the tube.
- Fill the details of the calibration status in the label pasted on the Instrument / Apparatus.
- Report any discrepancy observed during calibration to Quality Assurance Manager and notify the defect to engineering department or Service Engineer of the instrument. Affix an Under Maintenance label on the instrument.
- Frequency of calibration
- Calibrate the apparatus quarterly and after each maintenance job.
| S.NO. | PARAMETER | STANDARD | ACCEPTANCE CRITERIA | FREQUENCY | REFERENCE |
|
1
|
No. of Cycles/min.
|
Visually/Calibrated stop watch |
28-32 Cycles/min |
Quarterly |
IP/ OSp |
| 2 | Temperature | Calibrated Thermometer | 37±2°C | ||
| 3 | Time | Calibrated Stopwatch | ±20 sec / 10min | ||
| 4 | Aperture of wire mesh | Calibrated Vernier caliper | 1.80 to 2.20 mm | ||
| 5 | Diameter of wire of wire mesh | Calibrated Vernier caliper | 600- 655 µm |
- Forms and Records (Annexures)
- Not Applicable
- Distribution
- Master copy – Quality Assurance
- Controlled copies- Quality Assurance, Production, Quality Control.engineering
- History
Date Revision Number Reason for Revision – 00 New SOP
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