Calibration & Operation of Micrometre
1.0 OBJECTIVE
1.1 To provide the guideline for operation, maintenance, and calibration of Digital Micrometre.
2.0 SCOPE
2.1 This procedure is applicable to the Digital Micrometre used in the packaging laboratory of quality Controlled.
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3.0 RESPONSIBILITIES
3.1 QC Chemists Lab analyst follows the SOP.
3.2 Head- QA, and QC for implementation of SOP.
4.0 PROCEDURE
4.0 Clean the faces of the anvil and spindle with cloth or paper then bring them together carefully by turning the ratchet stop. If the line marked ‘0’ on the thimble does not coincide with the reference line of the sleeve, adjust zero position in the following manner.
4.2 Deviation within & over ± 0.01 mm (0.001”): adjust the sleeve & then press the zero button until. The reference line coincides with the “0” line of the thimble.
4.3 Before every application check the instrument for zero position.
4.4 Turn ratchet stop in an anticlockwise direction. Then keep the object of which thickness is to be measured between two faces of an anvil, bring it close to each other carefully by turning the ratchet stop clockwise so as to hold the object sufficiently.
4.5 Check the reading on the digital screen.
4.6 Least count of the Digital Thickness Gauge is 0.001 mm and its maximum capacity is 25 mm.
5.0 CLEANING AND MAINTENANCE
5.1 Handle the instrument with care.
5.2 Regularly clean the instrument with a dry cloth.
5.3 Keep the apparatus in the cabinet box when not in use.
6.0 CALIBRATION
6.1 Instrument calibration must be performed within calibration window of ±7 day from the due date of calibration,
6.2 Calibrate the instrument through an external agency.
6.3 Calibration Frequency Yearly & External agency.
8.0 ABBREVIATION
SOP:
Standard Operating Procedure
QA:
Quality Assurance
QC:
Quality Control
CM: Centimeter
7.0 REFERENCE:
Instrument manual
