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.

• 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