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Test/Calibration Certificate issued from the laboratory contains the following information as under :

1. Name and address of the firm/customer on behalf of whom test fee is received.
2. Reference number of the forwarding letter/test request with date.
3. Date of receipt of sample and issue of the Test Certificate.
4. Description of sample including details of the seal, if any, as found on the sample.
5. Specification number and year with Amendment/Amendments, if any, as per which test/calibration is undertaken.
6. Any deviation from the test/calibration method, where relevant.
7. Test-wise results in sequence/calibration results.
8. Remarks/comments regarding conformity or otherwise of the sample based on the test/calibration results obtained with reference to the requirements of the relevant Standard Specification.
9. Signature of the Scientist (Scientist SB or Scientist SC as the case may be) of the concerned Laboratory who accepts complete responsibility regarding authenticity of the contents in the Test Certificate.
10. Emboss with signature of the Divisional Head.

Note :
1. No remarks /comments are offered when the sample is not tested/calibrated as per any Specification.
2. The result of test/calibration furnished in the Test Certificate relates only to the sample tested/calibrated.
3. Reproduction of Test/Calibration Certificate is not permitted except in full without the written permission from the Director/Incharge of the concerned region.
4. The Test/Calibration Certificates are issued to the clients by registered post.

Amendment to or revision of issued Test/Calibration Certificate :

To maintain uniformity in practice the situation for issuance of amendment to or revision of Certificate in case of an eventuality is identified and, where necessary, the same is issued against the Certificate already issued by NTH so that the clients always get the correct observations/results. The procedure being followed is as under :

1. Such type of case, on receipt from any client, is first referred to the Director/Scientist-in-Charge who in turn sends the case to the Divisional Head of the concerned Laboratory for investigation.
2. On investigating the case including re-testing of sample/samples where necessary, if the Divisional Head finds that there is no need to issue amendment to or revision of already issued Certificate he prepares a draft reply indicating therein the findings of the investigations made by him and put up to the Regional Head for his examination and approval. On obtaining approval from the Regional Head the same is issued to the client by registered post.
3. If after investigation including re-testing/re-calibration of the sample, where necessary, the Divisional Head finds that changes are required to be made in the already issued Certificate, he prepare a draft revised Certificate under the same number of the already issued Certificate but with the added word 'Revised' and put to the Regional Head for the his examination and approval.
4. The Divisional Head after obtaining approval from the Regional Head withdraws the original Certificate from the client issued to them earlier and instead issues the revised Certificate.