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Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Acoustics, Ultrasound, Vibration for Mexico (.PDF file)
Pressure sensitivity level. Measurement microphone type LS2. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.05
Pressure reciprocity IEC 1094-2:1992
Frequency: 63 Hz to 3.15 kHz
Internal NMI service identifier: CENAM/510-F013-001
 
Pressure sensitivity level. Measurement microphone type LS2. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.06
Pressure reciprocity IEC 1094-2:1992
Frequency: 4 kHz to 8 kHz
Internal NMI service identifier: CENAM/510-F013-001
 
Pressure sensitivity level. Measurement microphone type LS2. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.1
Pressure reciprocity IEC 1094-2:1992
Frequency: 9 kHz to 10 kHz
Internal NMI service identifier: CENAM/510-F013-001
 
Pressure sensitivity level. Measurement microphone type LS2. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.12
Pressure reciprocity IEC 1094-2:1992
Frequency: 12.5 kHz
Internal NMI service identifier: CENAM/510-F013-001
 
Pressure sensitivity level. Measurement microphone type LS2. Measurand unit, dB (reference: 1 V/Pa)
Absolute expanded uncertainty (k = 2, level of confidence 95%) in dB: 0.14
Pressure reciprocity IEC 1094-2:1992
Frequency: 14 kHz to 18 kHz
Internal NMI service identifier: CENAM/510-F013-001
 
Ultrasonic power. Ultrasonic source transducer, 0.01 W to 1 W
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 11
Radiation force balance IEC 1161
Frequency: 1 MHz to 10 MHz
Internal NMI service identifier: CENAM/510-F018-003
 
Time scale difference. Local clock, -1 s to +1 s
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 2
Local clock vs. UTC(CNM)
Averaging time: 1 hour
Approved on 25 February 2009
 
Time scale difference. Local clock, -1 s to +1 s
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 20
Local clock vs. UTC
Averaging time: 5 days
This service requires the publication of the Circular T of the BIPM corresponding to dates when the calibration services were performed in order to know the time difference between the clock under calibration and UTC
Approved on 25 February 2009
 
Time scale difference. Remote clock, -1 s to +1 s
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 15
Remote clock vs. UTC(CNM)
Averaging time: 1 day
GPS common-view comparison using multichannel GPS receiver
Approved on 25 February 2009
 
Time scale difference. Remote clock, -1 s to +1 s
Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 25
Remote clock vs. UTC
Averaging time: 5 days
GPS common-view comparison using multichannel GPS receiver
This service requires the publication of the Circular T of the BIPM corresponding to dates when the calibration services were performed in order to know the time difference between the clock under calibration and UTC
Approved on 25 February 2009
 
Frequency. Standard frequency source, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 1.0E-13
Local frequency standard
Averaging time: 2 days
Approved on 25 February 2009
 
Frequency. Standard frequency source, 10 MHz
Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 1.0E-13
Local frequency standard
Averaging time: 2 days
Approved on 25 February 2009
 
Frequency. Standard frequency source, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 5.0E-13
Remote frequency standard
Averaging time: 1 day
GPS common-view comparison using multichannel GPS receiver
Approved on 25 February 2009
 
Frequency. General frequency source, 1 MHz to 100 MHz
Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 2.0E-13
Direct frequency measurement
Averaging time: 2 days
Approved on 25 February 2009
 
Frequency. Frequency counter, 1 MHz to 100 MHz
Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 2.0E-13
Direct frequency measurement
Averaging time: 2 days
Approved on 25 February 2009
 
Absolute pressure gas medium. Low pressure gauges, 1 kPa to 120 kPa
Absolute expanded uncertainty (k = 2, level of confidence 95%) in Pa: 0.5 to 2.5
Direct comparison with standard
Temperature: 20 °C
Internal NMI service identifier: CENAM/720-F002-002
 
Mass. Weight, 1 mg
Absolute expanded uncertainty (k = 2, level of confidence 95%) in mg: 0.0005
Subdivision
Temperature: 20 °C
Humidity: 40 % to 60 %
Pressure: 81 kPa
Approved on 04 December 2011
Internal NMI service identifier: CENAM/730-F008-C062-CC
 
Mass. Weight, 2 mg
Absolute expanded uncertainty (k = 2, level of confidence 95%) in mg: 0.0005
Subdivision
Temperature: 20 °C
Humidity: 40 % to 60 %
Pressure: 81 kPa
Approved on 04 December 2011
Internal NMI service identifier: CENAM/730-F008-C062-CC
 
Mass. Weight, 5 mg
Absolute expanded uncertainty (k = 2, level of confidence 95%) in mg: 0.0005
Subdivision
Temperature: 20 °C
Humidity: 40 % to 60 %
Pressure: 81 kPa
Approved on 04 December 2011
Internal NMI service identifier: CENAM/730-F008-C062-CC
 
Mass. Weight, 10 mg
Absolute expanded uncertainty (k = 2, level of confidence 95%) in mg: 0.0005
Subdivision
Temperature: 20 °C
Humidity: 40 % to 60 %
Pressure: 81 kPa
Approved on 04 December 2011
Internal NMI service identifier: CENAM/730-F008-C062-CC