SOP - OPERATION AND CALIBRATION OF VERNIER CALLIPER

1.0 OBJECTIVE

To lay down procedure to operate and calibrate Digimatic Vernier Calliper.

2.0 SCOPE

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

3.0 RESPONSIBILITY

Officer / Executive.

4.0 ACCOUNTABILITY

Department Head.

5.0 PROCEDURE

5.1 PROCEDURE FOR GENERAL CLEANING

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

5.1.2 Care has to be taken to remove foreign particles from Measuring Faces.

5.1.3 Always keep the caliper in the case provided.

5.2 PROCEDURE FOR OPERATION

5.2.1 Switch on the caliper by pressing ON / OFF button.

5.2.2 Press ZERO / ABS button.

5.2.3 Press In / mm button for desired output in inches / millimeters.

5.2.4 Check whether the display is 0.00 mm / 0.0000 in as per the mode selected in.
5.2.5 Close the measuring jaws. Read display.

5.2.6 If display is not zero 0.00 mm / 0.0000 in. adjust it to 0.00 mm / 0.0000 in.

5.2.7 Clean the jaws.

5.2.8 Close the jaws completely.

5.2.9 Press the ORIGIN button to get display zero.

5.2.10 Place clean sample in between measuring jaws and close the jaws.

5.2.11 Record the reading displayed.

5.2.12 Switch off the display by pressing ON / OFF button.

5.2.13 Take out the sample, clean the jaws and keep the caliper in case.

5.3 CALIBRATION PROCEDURE

5.3.1 Calibration of the vernier caliper will be done through External calibration Service laboratory.

5.3.2 Report for any discrepancy observed in the Calibration report to Department head and Stop using the Caliper . Affix BREAK-DOWN tag to the Caliper 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