SOP - OPERATION AND CALIBRATION OF SCREW GAUGE

1.0 Objective

To lay down procedure to operate and calibrate Screw Gauge.

2.0 SCOPE

This SOP Covers the operation and calibration procedure of screw gauge and is applicable to Quality Control Department.

3.0 Responsibility

Executive.

4.0 Accountability

Department Head

5.0 PROCEDURE

5.1 Procedure for general cleaning

5.1.1 Clean the instrument with a dry clean cloth before and after use.

5.1.2 Always keep the Screw Gauge in the case provided.

5.2 Operating Instructions

5.2.1 Close the measuring faces.

5.2.2 Read the display on counter and thimble.

5.2.3 If the display is not zero adjust it to zero with furnished spanner.

5.2.4 Place the sample between the measuring faces and close smoothly until both measuring faces just touch the sample. Don’t close tightly.

5.2.5 Record the reading displayed.

5.2.6 Take out the sample, clean and keep the Screw Gauge in case.


5.3 CALIBRATION procedure

5.3.1 Calibration of the Screw Gauge will be done through external agency from calibration Service Laboratory.

5.3.2 Report for any discrepancy observed in the calibration report or operation to Department Head and stop using the Micrometer. Affix “BREAK-DOWN” tag to the Screw Gauge and inform to Utility department for rectification.

5.3.3 Frequency of calibration
once a year and after each maintenance job.


6.0 REASON FOR REVIEW
First time issue.