CALIBRATION OF MASTER CLOCK

• OBJECTIVE:

To lay down a procedure for Calibration of Master clock.

• SCOPE:

This SOP is applicable for Calibration of Master clock at {Company Name} {Company Location}.

• RESPONSIBILITY:

• Technical Asst / Executive Engineering – To ensure the Calibration of Master Clock.

• Executive – IT Dept to co-ordinate for the Internet connection.

• Head – Engineering shall ensure compliance as per SOP.

• ACCOUNTABILITY:

Engineering Head

Head Quality Assurance

• PROCEDURE:

• Ensure that the Master Clock is in cleaned condition.

• Ensure that all the slave clocks are allotted and affixed identification numbers as per the format of Annexure-I.

• Calibration shall be performed once in a year and as when required.

• Master clock shall be coded as per the respective SOP.

• Ensure that the Master clock is calibrating by using www.time.nist.gov web site.

• Calibration of Master clock:

• Take the PC/Laptop to the master clock area to perform the online calibration.
• Switch ON the PC/Laptop and provide the appropriate username and password.Wait till stabilization of the system after completion of the Virus test.Select “START” and go to “CONTROL PANEL”.Select “DATE AND TIME OPTION” in the “CONTROL PANEL”.
• Select Internet time option and find the
• time.windows.com
• time.nist.gov
• In server option select time.nist.gov and click apply and then OK.
• Cross check the master clock time with the internet time for the duration of 12 Hrs. and record the timings for every 2 hrs. as per Annexure-II.
• After completion of master clock calibration cross check, the slave clocks at random places for confirming the same time by using mobile communication.
• After completion of random verification of slave clocks, affix the label to slave clocks as per the Annexure-III.
• As being slave clock receives the synchronized calibrated signal from the master clock continuously, there is no need for individual calibration for slave clocks.
• Update and affix the Calibration status label for master clock as per the respective SOP.
• If any problem with the digital wall clock is observed by the respective user Department, they shall raise breakdown request as per the respective SOP.
• If needs any replacement of the slave digital wall clock and new one shall be calibrated with a master clock and record the readings as per the Annexure-IV.
• Replacement and new slave clocks next calibration shall be follow the previous slave clocks calibration.
• Numbering of Digital Wall clocks (SLAVE)

               AAAB0001-01

AAA: Indicate Digital wall clock.

B:  Indicate Area/block/location of the Wall Clock

0001: Indicate unique serial number.

    01: serial number of replacement Instrument

• Annexure-I will be updated when the new digital wall Clock is assigned in list.
• If any replacement of clock will be occurred at any time, That particular clock numbering will be given here under.

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• REFERENCES:

  Not Applicable

• ANNEXURES: 

ENCLOSURES: SOP Training Record.

• DISTRIBUTION:

• Controlled Copy No. 01                     Head Quality Assurance
• Controlled Copy No. 02                 Head-Engineering
• Master Copy                           Quality Assurance Department

• ABBREVIATIONS:

SOP             :           Standard Operating Procedure.

PC              :             Personal computer.

• REVISION HISTORY:

                                                             CHANGE HISTORY LOG

ANNEXURE-I
LIST OF DIGITAL WALL CLOCKS (SLAVES)

ANNEXURE-II
CALIBRATION/VERIFICATION RECORD FOR MASTER CLOCK

ANNEXURE-III
DIGITAL WALL CLOCK (SLAVE) VERIFICATION-LABELS

ANNEXURE-IV
CALIBRATION/VERIFICATION RECORD FOR SLAVE CLOCK

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