Precision Measurement Center - Mahr Federal's Metrology Laboratory in Providence, RI
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Structurally, the Center is unique. All measurement equipment rests on a five-foot thick concrete slab located just below the floor. Weighing nearly 375 tons, the slab is independent of the surrounding building and is supported by three 30-foot tubular steel columns which rest on a vibrationally stable layer of rock.
This elaborate construction eliminates the influence of external vibrations which could cause measurement inaccuracies... even eliminating the influence of laboratory personnel moving about the room. Because the slab is so well isolated from its local environment, other disturbances such as highway traffic and heavy equipment in the adjoining factory do not adversely affect the high accuracy gaging equipment. Air and Atmosphere...tightly controlled A complex air conditioning, circulation and filtration system controls our Measurement Center’s temperature and atmospheric conditions. Air cascades through the room from ceiling to floor, changing itself every half-minute. This important vertical downflow eliminates air stratification, helps control dust and provides a barrier of clean air between the gages and technicians. Since air temperature and humidity can adversely affect measurements, air temperature is maintained at 68°F/20° C, within 2/10 of 1° C and relative humidity is a constant 40%, ±10%.
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Fully equiped - 130B-24 Gage Block Comparator
- 130B-16 Gage Block Comparator
- 828 CIM Length Gage
- 136B-3 ID/OD Comparator
- 700B Comparator
- MMQ44 Formtester, Formscan 3300
- MarSurf LD120
- Surfanalyzer 5000
- Surfanalyzer 5400
- 832 Digital & Analog Dimensionair
- Micro Inch Calibrator
- Hewlett Packard Laser
- Heidenhain Probe
- Hart Scientific Temperature controlled oil bath
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High Accuracy Measurements
High accuracy is realized with uncertainty measurements of 0.06 micron/2.3 microinch on gage blocks (up to 50 mm/2.3 inch long).
The Mahr 828 CiM in the Precision Measurement Center has a gaging uncertainty of as little as .000004“. Its measuring precision, high measuring speed, innovative measuring processes, and ease of operation all combine to ensure fast, reliable measurements.
Additionally, the Mahr Federal Model 130B-24 and Model 130B-16 Gage Block Comparators, widely used and recognized as the finest of their kind, are employed in the Precision Measurement Center together with the Model 136B-3 Master Ring and Disc Comparators. NIST Traceability Grand Master Sets Working masters are remeasured annually against the Grand Master sets, which are calibrated at NIST on a regular schedule. This procedure provides Mahr Federal and its customers with a link directly traceable to NIST, assuring not only that our standards are accurate, but the lab itself, the equipment and measuring techniques used are rigidly maintained. Thereby, our commitment to a constant quest for the highest reliability in industrial metrology is also constantly maintained. Mahr Federal’s calibration system is certified to ISO-9001. Our certification body is NQA, USA.
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