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DC & Low Frequency Metrology |
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Martin Instrument Laboratories is capable of making many types of electrical measurements. Our quality system and measurement assurance programs are integral parts of providing traceable measurements. A computer controlled GPIB instrument network and automated calibration software allow us to log, analyze, and document large amounts of measurement and calibration data efficiently. Measurement assurance programs are maintained to validate our instrument?s calibrations, and their stability between regular calibrations. These measurement assurance programs also allow us to participate in advanced metrology studies. Martin Instrument Laboratories DC measurement assurance programs utilizes two Fluke 732B DC Reference Standards, a Fluke 752A Reference Divider, a Hewlett Packard 3458A Long Scale Digital Multimeter, and a Fluke 5500SC300 Multi-Product Calibrator. Our AC Low Frequency measurement assurance programs utilizes various Vacuum Thermal Converters, a GPS Time and Frequency Receiver with rubidium atomic clock and a low phase noise crystal oscillator. A VLF WWVB Time-Frequency Receiver/Comparator is also utilized. |
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We operate rubidium atomic clocks and ovenized quartz oscillators. One of our low phase noise ovenized quartz oscillator is disciplined by the US Naval Observatory atomic clocks via GPS Time/Freq Receiver. Regular phase comparisons with NIST atomic clocks are made via the NIST provided WWVB 60kHz LF radio transmission. |
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Above a DC Volt measurement assurance program utilizes the Hewlett Packard 3458A long scale digital multimeter to directly measure one of the 732B reference standards. Corrections are applied for the bias and predicted regressions of the standards. Martin Instrument Laboratories utilizes this HP3458A to make over 100 GPIB automated measurements of our Fluke 5500A/SC300 calibrator to insure measurement stability. |
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Above is a comparison graph of two 10V reference standards. The calculated reference volt is maintained by two 732B reference standards and is used solely for Measurement Assurance Programs, and metrological studies. DC Voltage traceability at Martin Instrument Laboratories is maintained through a regularly calibrated Hewlett Packard 3458A long scale DMM. |
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The above the graph depicts the calculated 2s limits for measurements of our FL5500A made by our HP3458A long scale digital multimeter. Over 250 measurements made regularly since 2001 are utilized to derive the statistics. This is the estimated uncertainty associated with our measurement assurance program, and not the combined standard uncertainties associated with our best measurement capabilities. |
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The above the graph depicts the calculated 2s limits for measurements of our FL5500A made by our HP3458A long scale digital multimeter. The data is the result of over 250 measurements. This is the estimated uncertainty associated with our measurement assurance program, and not the combined standard uncertainties associated with our best measurement capabilities. |
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Instrument Service |
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DC & LF Metrology |
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Mass & Force Metrology |
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Resistance Metrology |
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Temperature Metrology |
