Internal and External Calibration -The metal detection machines are re-calibrated each year by Package Care. The Maintenance Manager ensures, when alerted that Package Care are contacted for repair and re-calibration. Re-calibration and repair is recorded and records are kept with the metal detection machine. Read also Pressure Gauges Calibration Apparatus sss
The master rule is re-calibration yearly by an accredited body.
The purpose of this procedure is to ensure that all measuring equipment consistently give readings of known accuracy.
This procedure applies to inspection, measuring and test equipment currently used for verification activities.
The Maintenance, Fabric Technologist & Quality Assurance Managers are responsible for ensuring this procedure is adhered to.
The master rule is kept in the Q.A. Managers office.
All the Laboratory equipments are re-calibrated every year.
Internal Calibration
All rulers and measuring tapes are calibrated by the Q.A. Manager using the master rule they are then marked that they have been calibrated and a calibration log is kept by the Q.A. Manager all rulers and measures are re-calibrated every year.
Relevant personnel are responsible for ensuring only calibrated rulers and measures are used.
Light boxes are checked every six months. This is recorded and kept with the light box.
Light boxes are re-painted every year or more if the light box has been scuffed.
Light boxes are kept free from dust to ensure the minimum of maintenance.
Micrometer Calibration -All measuring taps used in Auto Knitwear Ltd. Sewing Line, Measurement Checking, Final Inspection and Stores Dept. must be properly calibrated at an interval of 90 days Read about Pressure Gauges Calibration Apparatus ..
Calibration of Tapes shall be performed by using the calibration standard. A Measuring Scale of 1 meter length with a valid accuracy shall be obtained and certified by Bangladesh Standard and Testing Institute (BSTI) centimeter sale measurement.
Manager Maintenance shall be the custodian for the Measurement calibration standard and it will be safeguarded from any unauthorized use.
The Measuring tapes shall be calibrated against the certified Standard in Centimeters scale. The record of such calibration shall be maintained in Calibration record form.
Maximum acceptable tolerance for the measuring tape shall be identified in the calibration certificate. Any tape showing readings greater than the acceptable limit will be withdrawn from the floor and replaced with a calibrated one.
Measuring tapes to be calibrated shall be measured to 1 meter (0-100cm) length from the starting edge against eh calibration standard tape and record shall be taken.
The reading of the tape under calibration (against 1 meter of the calibration standard tape) shall be taken and written down.
The deviation shall be calculated and converted into centimeters meter standard in the following formula : aaaa
Reading of standard Reading of tape to be calibrated Deviation/100cm
Bulk Production Procedure
PURPOSE
The purpose of this procedure is to confirm that prior to bulk production despatch from factory, garments representing of bulk production confirm to customer requirement
RESPONSIBILITY AND AUTHORITY
It is the responsibility of the Quality Assurance Manager to ensure the implementation of this procedure.
PROCEDURE
After the cutting authorisation for bulk has been received from head office, first bulk cutting is proceeding.
During the bulk production, for every style and colour will be selected and sent to the Head Office Garment Technical Manager
The Technical Manager will select a standard by measuring garments and comparing them to contract seal. The sky will then be taken together with the standard and style file to the Quality Centre for auditing.
Once the Quality Centre has audited sky pack the Technical Manager will approve for shipment of further bulk production by signing the audit report and returning it to the factory. If sky pack fails the audit this is communicated back to the factory together with actions to be taken.
Four garments in all sizes will be selected, these must be checked for labelling, presentation and fitted, (using usual models), on approval, if these are approved, rack samples will be submitted to the customer.
If the customer does not approve the rack samples they will be returned to the manufacturing unit and stock will not be made available to the customer until satisfactory samples have been submitted.
Conclusion
Micrometer Calibration -All measurement tapes shall be given individual serial numbers. A calibration card showing calibration status, date of calibration and the next date for calibration shall be attached to all the calibrated tapes.
All monitoring and measuring devices, which affect product quality or utilized by Production and Quality Control for product acceptance, are subject to the Scale Calibration outlined in this policy. Calibration is to make against nationally or internationally recognized standards. Auto Knitwear uses services of Bangladesh Standards and Testing Institution (BSTI) and other renowned sources in the world where required.
PROCEDURE DESCRIPTION:
All monitoring and measuring devices are re-validate any product determined to have been inspected or processed by out of calibration equipment. Calibrated Standard SS Scales are kept by Responsible person.
System is maintained to identify, assess, and re-validate any product determined to have been inspected or processed by out of calibration equipment. Quarterly, check the accuracy of the used measuring scales on production floor, Laboratory and Inspection area.
All calibration, measurement and tests are carried out under suitable environmental conditions and all equipment is maintained and handled to ensure its accuracy and fitness for use. The SS scale kept beside the Calibrated Standard scale and start reading from “Zero” to finish point of the scale.
Calibration and/or adjustment of all measuring, control, and test equipment are to be performed by authorized personnel only.
Need to Record reading every 20 mm interval on the Verification form.
Standard Reading from zero mark (mm) and Unit under Calibration (UUC) from zero mark (mm) is checked parallel every 20cm interval and keep record both scale up to scale reading finish point
If Unit Under Calibration (UUC) from zero mark (mm) reading is more or less than Standard Reading from zero mark (mm) then its called Deviation.
If Unit Under Metal Detector Calibration (UUC) from zero mark (mm) reading is more than Standard Reading from zero mark (mm) then it will be (-) Deviation and if Unit Under Calibration (UUC) from zero mark (mm) reading is less than Standard Reading from zero mark (mm) then it will be (+) Deviation.
If the measurement is within the tolerance level (± 0.05 mm maximum), than the SS Scale is pass or fit for use.
If the measurement is out of tolerance level (more than ± 0.05 mm), than the SS Scale is not pass or unfit for use.
If the Measuring scale reading erased or not seen on the scale then corrective action must be taken.
If the scale reads within the limits specified in step 8, then the scale passes and is fit for use.
If the scale does not pass or unfit for use, make whatever corrective action is required (if necessary, it refer to the supplier). Record the corrective action on the Quarterly Scales Verification Check Form.
After verification, We are using a tag on every ss scale consist of Serial number, date of verification, date of validation, Inspector sign and this tag will change quarterly.
Details of Unit Under Calibration (UUC):
When it is impractical to apply a calibration label directly to an Monitoring and Measurement Device, the calibration label may be affixed to the equipment container or some other suitable measure may be used to reflect calibration status. Any alternate methods shall include the identification number.
Description : Stainless Steel Scale
Manufacturer : Made In China
Model/Type :
Serial Number : of 40
ID No. :Auto/Woven/
Range/Working Range (mm) : 0 to 150 mm.
Location of Verification : Factory Office.
Visual Inspection : Ok
Date of Verification : 01/11/2017
Date of Validation : 01/02/2018
Duration of Verification : Every 03 Month (Quarterly).
Verification Procedure : The verification has been performed under controlled using
Calibrated Scale (Calibrated by OTS, Date: 20/07/2016)
OBSERVATION:
Monitoring and Measurement Device and measurement standards shall be calibrated by Bangladesh Standards and Testing Institution (BSTI) or an approved source whose calibration is traceable to any national, international or industrial recognized standard. Length: (Verified against calibrated Scale from OTS)
SL.No.
Standard Reading from zero mark (mm)
Unit Under Calibration (UUC) from zero mark (mm)
Deviation (mm)
Tolerance level
01
20.0
(± 0.05 mm maximum)
02
40.0
03
60.0
04
80.0
05
100.0
06
120.0
07
140.0
08
150.0
09
10
Example 2
Details of Unit Under Calibration (UUC):
Description : Stainless Steel Scale
Manufacturer : Made In Taiwan.
Model/Type :
Serial Number : of 6
ID No. : IIIU
Range/Working Range (mm) : 0 to 300 mm.
Location of Verification : Factory Office.
Visual Inspection : Ok
Date of Verification : 01/11/2014
Date of Validation : 01/02/2018
Duration of Verification : Every 03 Month (Quarterly).
Verification Procedure : The verification has been performed under controlled using
Calibrated Scale (Calibrated by OTS, Date: 20/07/2016)
OBSERVATION:
Reports, or data sheets attesting to the description or identification of the item; the calibration source date of calibration; calibration assigned value; statement of uncertainty; and environment or other conditions under which calibration results were obtained. Certificates or reports are traceable to a recognized source or BSTI. The calibration source shall be responsible for assuring that calibration is traceable to agencies other than recognized source. The measurement standards used in obtaining their results shall be traceable and with the applied standard through documented objective evidence. Length: (Verified against calibrated Scale from OTS)
Quality Control Manager shall assess calibration result every year and based on that assessment he may shorten or lengthier the interval of calibration. When findings deviate from written standards the QA designate will document findings on the Monthly/ Quarterly Internal Audit Form and notify the General Manager of the deviation. Short term action will be initiated and recorded on the Daily / Monthly Check List. Long term action required, will be discussed by management and corrective actions / responsibilities and time frames will be agreed and documented. When a Monitoring and Measurement Device is found to be out of calibration, Quality Control Manager shall: ssess all products manufactured using the defective equipment within the period of last calibration date to date of detection of the defect. This assessment as well as any further actions as detailed below, shall be recorded. Verify if the out of calibration discrepancy found on the Monitoring and Measurement Device equipment is still within requirements for measuring product specification. This is acceptable if the out of calibration condition is still with in the accuracy required for measuring product. Quality Control Manager is responsible for assessing risk posed by the out-of-calibration condition. He may involve Director (Marketing & QC) at his discretion to evaluate any actions necessary including notifying to buyer for recall. If the products are still within the specification, no further action is required.
PROCEDURE DESCRIPTION:
All monitoring and measuring devices, which affect product quality or utilized by Production and Quality Control for product acceptance, are subject to the calibration outlined in this policy.
Calibration is to make against nationally or internationally recognized standards. Auto Knitwear uses services of Bangladesh Standards and Testing Institution (BSTI) and other renowned sources in the world where required
Calibration of Monitoring And Measurement Device shall be done at an interval defined in SOP or recording form or as recommended by calibration source. Every day, check the accuracy of the scales on production lines and ingredient weigh-up area.“Zero” the scale and then place 1 kg standard weight on the scale and record the reading.If standard weight reads more than 2 grams outside its stated weight then corrective action must be taken.
Written Standard Operating Procedure shall be used for all calibration of Monitoring and Measurement Device where calibration will be done internally using house method or to calibrate working device using calibrated standard.
If the scale reads within the limits specified in step 2, then the scale passes and is fit for use.
If the scale does not pass, make whatever corrective action is required (if necessary, refer to the manufacturer’s manual or in the case of the Excell 986 scales use the following calibration procedure). Record the corrective action on the Daily Scales Calibration Check Form.
Calibration of the Excell 986 Scales:
Any Monitoring and Measurement Device found to be out of calibration shall be removed from use by the concerned Manger Maintenance or Quality Control Manager and shall take appropriate action to re-calibrate. While the power is OFF, press “On/Zero” key (don’t release) and press “Tare” key three times to enter offset mode.
Monitoring and measurement standards shall be labeled to indicate calibration status. Press “On / Zero” key to enter the Calibration Mode.
Put the full capacity mass on the scale (2 kg) and press “On / Zero” key to show “CAL 1”, then the display will show “the capacity”, (i.e. if the scale is 2Kg, it will show “2000g”). At this time, the calibration is finished. Then, remove the mass from the scale
The calibrated Monitoring and Measurement Devices and measurement standard shall be identified by “CALIBRATED” label. The label shall identify the date calibrated (month, day, year), specific calibration due date and the initial of the person calibrated the equipment.
Calibration of ACS Weighing Scales:
While the power is on, keep pressing (CAL) for about 4 seconds. Calibrate after the weight window displays “CAL”.
Press (SET), the weight window displays the weight calibrated last time.
Press (á) and (ENTER) to input the weight you want to load. Then load the corresponding weight. Press (ENTER) to make sure the calibration finished.
Out of Calibration Monitoring and Measurement Device or having limitations of their use shall be labeled “DO NOT USE”. The high limit and low limit set in the weighing model are saved in the scale. Different unit s corresponding to different alarm range and methods. The value inputted by pressing (á) cannot be more than the full scale.
All monitoring and measuring devices are re-validate any product determined to have been inspected or processed by out of calibration equipment. System is maintained to identify, assess, and re-validate any product determined to have been inspected or processed by out of calibration equipment. All calibration, measurement and tests are carried out under suitable environmental conditions and all equipment is maintained and handled to ensure its accuracy and fitness for use. Calibration and/or adjustment of all measuring, control, and test equipment are to be performed by authorized personnel only.
To Control of Monitoring and Measuring Equipment and maintain inspection, measuring and test equipment used by the Auto Garments Ltd. to demonstrate the conformance of product to the specified requirements
SCOPE:
This procedure applies to inspection, measuring and test equipment used by Auto Garments Ltd.
RESPONSIBILITY:
Maintenance in-charge is responsible for calibration of inspection, measuring and test equipment.
Quality Control is responsible for ensuring that only calibrated equipments are used for inspection, measuring and test.
Policy for Control of Monitoring and Measuring Equipment
Measurement is carried out in a manner that is consistent with the monitoring nd measurement requirements.
Measurement and inspection equipment is calibrated at defined interval.
Measurement and inspection standards are traceable to national or international standard.
Measurement and inspection standards and equipment are identified based on their calibration status.
Ensure Safeguard from adjustment that would invalidate measurement results
Ensure protection from damage and deterioration during handling, maintenance and storage.
To take appropriate action when it is found that the previous measuring results not to conform to requirements.
Implementation
Adequacy of Monitoring And Measuring Equipment:
Measurement process shall be identified in measurement specification sheet, Recording forms etc.
Quality Control is responsible for selecting an existing piece of instrument or purchasing new instrument having sufficient accuracy.
Instrument or standard used to calibrate equipment must have an accuracy better than that of the equipment being calibrated.
Intervals of Calibration
Calibration of Monitoring and Measuring Equipment shall be done at an interval defined in recording form or as recommended by calibration source.
Calibration Status Monitoring and measuring standards shall be labeled to indicate calibration status. calibrated Monitoring and Measuring Equipment and measurement standard shall be identified by “CALIBRATED” label.
The label shall identify the date calibrated (month, day, year), specific
Calibration due date and the initial of the person calibrated the Equipment.
Out of Calibration Monitoring and Measuring Equipment or having
limitations of their use shall be labeled “DO NOT USE.”
When it is impractical to apply a calibration label directly to an
Monitoring And Measuring Equipment, the calibration label may be affixed to the equipment container or some other suitable measure may be used to reflect calibration status. Any alternate methods shall include the identification number.
Calibration Source
Monitoring and Measuring equipment and measurement standards hall be calibrated by Bangladesh Standards and Testing Institution (BSTI) or an approved source whose calibration is traceable to any national, international or industrial recognized standard.
The calibration source shall be responsible for assuring that calibration is traceable to agencies other than recognized source. The measurement standards used in obtaining their results shall be traceable and with the applied standard through documented objective evidence.
In-House Calibration
Calibration shall be performed according to the calibration test method corresponding to the equipment/instrument being
Calibrated
Storage and Handling
Monitoring and Measurement Equipment and measurement standards shall be safeguarded, handled, stored, and transported in a manner such that the accuracy and fitness for use are maintained.
The Maintenance Technician will maintain all records of calibration in Calibration Record . The record shall be maintained for a period for at least 2 year
Review/Check
Quality Control shall assess calibration result every year.
Action
Based on the assessment and based on that assessment
Quality Control may shortened or lengthened the interval of calibration.
Out of Calibration Conditions
When a Monitoring and Measuring Equipment is found to be out of calibration, the Manager, Quality Control shall
Assess all products manufactured using the defective equipment within the period of last calibration date to
date of detection of the defect. This assessment, as well as any further actions as detailed below, shall be recorded.
Verify if the out of calibration discrepancy found on the Monitoring And Measuring Equipment is still within requirements for measuring product specification.This is acceptable if the out of calibration condition is still within the accuracy required for measuring products.
Quality Control is responsible for assessing risk posed by the out-of-calibration condition. He may involve General Manager at his discretion to evaluate any actions necessary including notifying to buyer for recall.
If the products are still within the specification, no further action is required
If buyer wants to return the products, Auto Garments will replace the products.
If buyer does not require any action to take from Auto Garments side the action part will close from Auto Garments side.
Conclusion
Control of Monitoring and Measuring Equipment- Any Monitoring and Measurement Equipment found to be out of calibration shall be removed from use by the Maintenance Technician or Manager, Quality Control and shall take appropriate action to re-calibrate.
