Metrology Lab Manual Inspection
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A Laboratory Manual for Mechanical Measurements& Metrology (2141901) 4th Semester. Metrology may be divided depending upon the quantity under consideration into: metrology of length, metrology of time etc. Depending upon the field of. Industrial inspection and its various techniques. Design, manufacturing and testing of gauges of.
The OWM Laboratory Metrology Program provides the basis for ensuring traceability of state weights and measures standards to NIST.
State legal metrology laboratories are custodians at the State level of measurement standards that serve as the basis for ensuring equity in the marketplace and as reference standards for calibration services for indigenous industry. As part of its program to encourage a high degree of technical and professional competence in such activities, the National Institute of Standards and Technology (NIST) Office of Weights and Measures (OWM) has developed performance standards and formalized procedures for Recognition of State legal metrology laboratories on a voluntary basis. Certificates of Metrological Traceability are issued upon evaluation of the laboratory's ability to make reliable metrological measurements (principally mass, volume, length, and temperature).
The OWM Laboratory Metrology Program consists of six formal Regional Measurement Assurance Program (RMAP) groups as shown in this map. The RMAPS include the Caribbean Measurement Assurance Program (CaMAP), the Southwestern Assurance Program (SWAP), the Southeastern Measurement Assurance Program (SEMAP), the Northeastern Measurement Assurance Program (NEMAP), the MidAmerica Measurement Assurance Program (MidMAP), and the Western Regional Assurance Program (WRAP). Participants include weights and measures laboratories and other government laboratories, such as Los Angeles County (LAC) and the U.S. Department of Agriculture, Grain Inspection Packers and Stockyards Administration (USDA-GIPSA).
Lab Metrology Resources
State of Arizona Metrology Laboratory
4425 W. Olive Avenue
Glendale, AZ 85302
602-771-4938
The State Metrology Laboratory is the custodian of the measurement standards for the state of Arizona. These standards serve as the basis for assuring equity in the marketplace and as the reference standards for calibration services for government, industry and business. The Lab consists of two specific operations: volume (large and small) and mass (large and small).
Over 8,500 different types of artifacts for various industries from pharmaceutical companies to aerospace industries, as well as other governmental agencies, are tested in the lab. Different types of artifacts for 213 Registered Service Agencies (RSAs) that employ over 600 registered service representatives (RSRs) have also been certified. The RSAs and RSRs are licensed with the Division and are the only companies with the authority to place in service or remove tags from any commercial device in the state.
Scheduling Calibration Services
The Laboratory scheduling priority, as required by State Statutes, ARS 3-3416, provides calibration services to all Weights and Measures investigators and Registered Service Agencies annually. When sufficient staff time is available to complete all other work requests, the requests will be placed on the schedule in the order in which they were received. The metrology lab will follow this order of priority to prevent scheduling conflicts.
Effective scheduling is necessary to ensure efficient use of the metrology staff and laboratory resources. The Metrology Laboratory maintains a work schedule that provides timely service to customers, and ensures that the laboratory staff will have sufficient time for instrument monitoring and laboratory standards surveillance. Effective scheduling promotes good measurement services, and reduces unnecessary deadline pressures that may lead to safety problems and shortcuts in procedures.
The Metrology Laboratory will not accept delivery of unscheduled artifacts.
Bio-Hazards Cleanliness Certification
Due to the increasing incidences of bio-hazardous infections the Arizona Metrology Laboratory requires a responsible individual complete and sign a Bio-Hazards Cleanliness Certification Form for each and every submission of mass standards (either directly or indirectly) by RSA, the pharmaceutical, bio-medical and/or chemical laboratory.
Certification Checklist
Save time on your next test or certification by doing the following BEFORE you bring your equipment into the lab.
Know The Fees - Laboratory testing is charged at $110 per hour or a minimum charge of $50 for less than 1/2 hour (including preparation time).
Make An Appointment: To schedule an appointment call the Metrology Lab at (602) 771-4938. No standards or equipment will be accepted without an appointment. This ensures that adequate service will be provided to each person.
Bring Them In Clean! Weights and other devices must be free from all foreign matter, such as dirt, rust, concrete, grease and other adhering substances. The following are cleaning and painting tips for:
Cast Iron Weights:
If needed, weights of 25 pounds or more should be thoroughly cleaned with a wire brush and freshly painted. If a weight shows any sign of chipping paint, the weight should be cleaned with paint remover. DO NOT sand, shot blast or sandpaper cast iron weights. This method of cleaning removes metal as well as paint and could result in the weight being rejected. When weights are freshly painted, it is strongly recommended that a thin coat of aluminum paint be used, not an enamel base paint. Enamel paint is not recommended due to a tendency of surface peeling.
Stainless Steel Weights:
Weights should be cleaned with ethyl alcohol to remove all extraneous matter. Care should be taken to avoid leaving a film on the weight and to prevent the entrance of alcohol into the adjustment cavity. DO NOT use alcohol on lacquered and/or plated weights.
Volume Standards (Gas Standards):
All volume standards must be free from all foreign matter and should be cleaned thoroughly with Simple Green or other non-foaming detergent. Depending on the condition of the surface, a vigorous cleaning of all inner surfaces may have to be repeated to ensure all removal of oily film and residue is complete. Dents must be removed and leaks must be repaired. Unless a volume standard is in extremely good condition, it must be freshly painted with a red paint. Painting does not apply to stainless steel standards or provers of 10 gallon or more. Gauge tubes, reading scales and other test measure components must be in working order and in good condition.
Volume Standards (Stainless Steel or Glassware):
Small liquid measures, 1 gallon or less, should be thoroughly cleaned with soap and water and rinsed thoroughly to prevent a soap film residue.
A printable checklist is available.
Laboratory Accreditation
State Metrologist Brian Sellers
Each state laboratory that meets the criteria of NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST) HANDBOOK 150: 2006, Procedure & General Requirements and NATIONAL VOLUNTARY LABORATORY ACCREDITATION PROGAM (NVLAP) may apply for formal accreditation. The accreditation certificate indicates that the laboratory has the necessary quality system, facilities, equipment, standards, and staff to provide accurate and traceable measurement services and that the laboratory is competent to carry out the measurement services for which it is accredited.
Current Laboratory Accreditation Status
The Lab is currently accredited by NIST, NVLAP Lab Code: 200381-0. Visit the NVLAP Website and see Arizona's current Metrology Laboratory Accreditation.
Measurement Quality System
NIST Handbook 150 incorporates ISO Guide 17025 quality system criteria and specific technical criteria for calibration laboratories. As described in Handbook 150, Arizona quality system consists of:
- Documented quality manual and procedures;
- Surveillance testing of standards and processes;
- Measurement process control charts;
- Inter-laboratory comparisons;
- Regular internal audits and management review;
- Periodic external audits; and
- Annual NIST and NVLAP submission.
Equipment and Reference Materials
The Lab maintains primary standards in mass and volume that are traceable to NIST. The stability, integrity and adequacy of measurement standards and equipment are monitored through continuous surveillance and are evaluated by NIST/WMD and NIST NVLAP.
Measurement Traceability
Traceability is defined as the ability to relate individual measurements with associated uncertainties using valid measurement procedures through an unbroken chain of calibrations to national or international standards. To ensure traceability, proper test methods, continuous measurement control, surveillance and documentation must be present at each step in the calibration process.
An accredited laboratory has demonstrated its capability to provide measurement traceability. When a test is completed in the Arizona Metrology Laboratory, a 'Test Number' is issued. This 'Test Number' is your link to national traceability. Learn more about laboratory traceability here.