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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a² + b²]^1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)

Hong Kong, China, SCL (Standards and Calibration Laboratory)

DC resistance , DC resistance standards and sources: high values : 1.00E-3 GΩ to 1000 GΩ

Fixed resistor, resistance box

Absolute expanded uncertainty : 6.8 Ω to 5.7E8 Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty / Ω","col_3":"Instrument type or method","col_4":"******** Standard ********","col_5":"Specifications"},"row_2":{"col_1":"0.1 Ω","col_2":"9.40E-08","col_3":"DCC bridge","col_4":"Reference resistors","col_5":"100 mA"},"row_3":{"col_1":"0.1 Ω to 1 Ω","col_2":"1.4E-07 to 1.4E-06","col_3":"DCC bridge","col_4":"Reference resistors","col_5":"10 mW"},"row_4":{"col_1":"1 Ω","col_2":"3E-07","col_3":"DCC bridge","col_4":"QHRS","col_5":"10 mW"},"row_5":{"col_1":"10 Ω","col_2":"3E-06","col_3":"DCC bridge","col_4":"QHRS","col_5":"-"},"row_6":{"col_1":"100 Ω","col_2":"3E-05","col_3":"DCC bridge","col_4":"QHRS","col_5":"-"},"row_7":{"col_1":"1 kΩ","col_2":"3E-04","col_3":"DCC bridge","col_4":"QHRS","col_5":"-"},"row_8":{"col_1":"10 kΩ","col_2":"3E-03","col_3":"DCC bridge","col_4":"QHRS","col_5":"-"},"row_9":{"col_1":"100 kΩ","col_2":"5E-02","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"-"},"row_10":{"col_1":"1 MΩ","col_2":"1","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"-"},"row_11":{"col_1":"1 Ω to 10 Ω","col_2":"4.6E-07 to 4.6E-06","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"-"},"row_12":{"col_1":"10 Ω to 100 Ω","col_2":"4.2E-06 to 4.2E-05","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"-"},"row_13":{"col_1":"100 Ω to 1000 Ω","col_2":"4.6E-05 to 4.6E-04","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"-"},"row_14":{"col_1":"0.001 MΩ to 1 MΩ","col_2":"6.8E-03 to 6.8 ","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"-"},"row_15":{"col_1":"10 MΩ","col_2":"10","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"100 V"},"row_16":{"col_1":"100 MΩ","col_2":"500","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"100 V"},"row_17":{"col_1":"1 MΩ to 10 MΩ","col_2":"6.8 to 68","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"100 V"},"row_18":{"col_1":"10 MΩ to 100 MΩ","col_2":"68 to 680","col_3":"Kelvin ratio bridge","col_4":"Reference resistor","col_5":"100 V"},"row_19":{"col_1":"0.1 GΩ to 10 GΩ","col_2":"4.6E+03 to 4.6E+05","col_3":"Modified Wheatstone bridge","col_4":"Reference resistor","col_5":"1000 V"},"row_20":{"col_1":"10 GΩ to 100 GΩ","col_2":"7.8E+05 to 7.8E+06","col_3":"Modified Wheatstone bridge","col_4":"Reference resistor","col_5":"1000 V"},"row_21":{"col_1":"100 GΩ to 1000 GΩ","col_2":"5.7E+07 to 5.7E+08","col_3":"Modified Wheatstone bridge","col_4":"Reference resistor","col_5":"1000 V"},"row_22":{"col_1":"1 mΩ","col_2":"3.1E-09","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"100 A"},"row_23":{"col_1":"10 mΩ","col_2":"1.9E-08","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"30 A"},"row_24":{"col_1":"100 mΩ","col_2":"1.5E-07","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"10 A"},"row_25":{"col_1":"0.1 mΩ to 1 mΩ","col_2":"3.9E-10 to 3.9E-09","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"100 A"},"row_26":{"col_1":"1 mΩ to 10 mΩ","col_2":"3.9E-09 to 1.9E-08","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"100 A at 1 mW to 30 A at 10 mW"},"row_27":{"col_1":"10 mΩ to 100 mΩ","col_2":"1.9E-08 to 1.5E-07","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"30 A at 10 mW to 10 A at 100 mW"},"row_28":{"col_1":"0.1 Ω to 1 Ω","col_2":"1.5E-07 to 1.4E-06","col_3":"DCC bridge","col_4":"Reference resistor","col_5":"10 A at 0.1 W to 1 A at 1 W"},"row_29":{"col_1":"1 Ω","col_2":"3E-05","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_30":{"col_1":"10 Ω","col_2":"5E-05 ","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_31":{"col_1":"100 Ω","col_2":"5E-04 ","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_32":{"col_1":"1 kΩ","col_2":"1E-03","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_33":{"col_1":"10 kΩ","col_2":"3E-02","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_34":{"col_1":"100 kΩ","col_2":"3E-01","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_35":{"col_1":"1 MΩ","col_2":"3","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_36":{"col_1":"10 MΩ","col_2":"30","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_37":{"col_1":"100 MΩ","col_2":"3000","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_38":{"col_1":"1 Ω to 10 Ω","col_2":"3E-05 to 5E-05","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_39":{"col_1":"10 Ω to 100 Ω","col_2":"5E-05 to 5E-04","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_40":{"col_1":"0.1 kΩ to 1.9 kΩ","col_2":"5E-04 to 3E-03","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_41":{"col_1":"1.9 kΩ to 190 kΩ","col_2":"3E-03 to 4E-01","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_42":{"col_1":"0.19 MΩ to 1 MΩ","col_2":"0.4 to 3 ","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_43":{"col_1":"1 MΩ to 10 MΩ","col_2":"3 to 30","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"},"row_44":{"col_1":"10 MΩ to 100 MΩ","col_2":"30 to 3000","col_3":"Digital multimeter","col_4":"Standard resistors","col_5":"-"}}

Kelvin ratio bridge or Modified Wheatstone bridge

Maximum voltage : 1000 V

Approved on 10 November 2014

Institute service identifier : SCL/2.1.3

CMC ID : APMP-EM-HK-000006RQ-1

DC resistance , DC resistance standards and sources: multiple ranges : 1 Ω to 1.00E8 Ω

Multifunction calibrator

Absolute expanded uncertainty : 3.0E-5 Ω to 3.0E3 Ω

Uncertainty table

Digital multimeter

Approved on 10 November 2014

Institute service identifier : SCL/2.1.5

CMC ID : APMP-EM-HK-000006S3-1

DC voltage (up to 1100 V) , DC voltage meters: intermediate values : 1.00E-3 V to 1000 V

DC voltmeter, multimeter, multifunction transfer standard

Absolute expanded uncertainty : 0.12 µV to 1.2E3 µV

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty / (µV)"},"row_2":{"col_1":"1 mV to 20 mV","col_2":"0.12"},"row_3":{"col_1":"20 mV to 200 mV","col_2":"0.24"},"row_4":{"col_1":"0.2 V to 2 V","col_2":"0.3 to 3"},"row_5":{"col_1":"2 V to 1000 V","col_2":"3 to 1200"}}

Comparison with standard via DCC potentiometer or resistive divider

Approved on 10 November 2014

Institute service identifier : SCL/1.2.2

CMC ID : APMP-EM-HK-000006RV-1

DC current (up to 100 A) , DC current sources: low values : 0.1 µA to 100 µA

Current generator, multifunction calibrator

Absolute expanded uncertainty : 0.89 pA to 9.0E1 pA

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty / (pA)"},"row_2":{"col_1":"0.1 µA to 1 µA","col_2":"0.89 to 3.2"},"row_3":{"col_1":"1 µA to 10 µA","col_2":"2.2 to 9.8"},"row_4":{"col_1":"10 µA to 100 µA","col_2":"18 to 90"}}

Volt drop across shunt

Approved on 10 November 2014

Institute service identifier : SCL/3.1.1

CMC ID : APMP-EM-HK-000006S9-1

DC voltage (up to 1100 V) , DC voltage meters: very low values : 0.1 mV to 1 mV

Nano-voltmeter, micro-voltmeter

Absolute expanded uncertainty : 0.12 µV

Comparison with standard via DCC potentiometer

Approved on 10 November 2014

Institute service identifier : SCL/1.2.1

CMC ID : APMP-EM-HK-000006RU-1

Hygrometers , Dew-point temperature : -40 °C to 30 °C

Dew-point hygrometer

Absolute expanded uncertainty : 0.15 °C

Comparison with reference dew-point hygrometer

Approved on 16 March 2011

Institute service identifier : SCL/3.1.1.002

CMC ID : APMP-T-HK-000006X6-1

Items for defining ITS-90 , Temperature : 660.323 °C

SPRT fixed point with furnace

Absolute expanded uncertainty : 6 mK

Aluminum freezing point cell

Modified on 09 February 2015

Approved on 05 June 2014

Institute service identifier : SCL/1.2.1.008

CMC ID : APMP-T-HK-000006XX-1

Items for disseminating ITS-90 and PLTS 2000 , Temperature : -30 °C to 0 °C

LIGT

Absolute expanded uncertainty : 3.0E-2 °C

Alcohol bath

Graduation interval: 100 mK. DUT at total immersion.

Approved on 16 March 2011

Institute service identifier : SCL/2.4.1.002

CMC ID : APMP-T-HK-000006XA-1

Items for defining ITS-90 , Temperature : 660.323 °C

SPRT

Absolute expanded uncertainty : 6 mK

Aluminum freezing point cell

Modified on 09 February 2015

Approved on 05 June 2014

Institute service identifier : SCL/1.3.2.008

CMC ID : APMP-T-HK-000006XY-1

Items for defining ITS-90 , Temperature : 156.5985 °C

SPRT fixed point with furnace

Absolute expanded uncertainty : 1.5 mK

Indium freezing point cell

Modified on 09 February 2015

Approved on 28 June 2007

CMC ID : APMP-T-HK-000006XT-1

Items for defining ITS-90 , Temperature : 419.527 °C

SPRT fixed point with furnace

Absolute expanded uncertainty : 1.5 mK

Zinc freezing point cell

Modified on 09 February 2015

Approved on 24 June 2004

CMC ID : APMP-T-HK-000006XM-1

Items for defining ITS-90 , Temperature : 29.7646 °C

SPRT

Absolute expanded uncertainty : 1 mK

Gallium melting point cell

Modified on 09 February 2015

Approved on 24 June 2004

CMC ID : APMP-T-HK-000006XN-1

Items for defining ITS-90 , Temperature : 156.5985 °C

SPRT

Absolute expanded uncertainty : 2 mK

Indium freezing point cell

Modified on 09 February 2015

Approved on 28 June 2007

CMC ID : APMP-T-HK-000006XV-1

Time interval , Time interval : 1 ms to 1000 ms

Period source

Relative expanded uncertainty : 3.0E-9 to 4.0E-6

Derived from direct frequency measurement using calibrated counter

Gate time : 120 s to 1000 s

Number of measurements : 5 to 10

Amplitude : 0.3 V to 2.5 V (peak-to-peak into 50 ohm)

Ideal DUT effect included

Approved on 31 August 2005

Institute service identifier : SCL/16

CMC ID : APMP-TF-HK-00000536-1

Time interval , Time interval : 38 ps to 100 ps

Period meter

Relative expanded uncertainty : 1.0E-10 to 2.0E-10

Measuring test signals from calibrated period source

Gate time : 1 s

Number of measurements : 5 to 10

Amplitude : 0.01 mW to 3 mW (power into 50 ohm)

Ideal DUT effect included

Approved on 31 August 2005

Institute service identifier : SCL/27

CMC ID : APMP-TF-HK-0000053F-1

Sound calibrators , Sound pressure level : 94 dB (reference: 20 µPa) to 114 dB (reference: 20 µPa)

Sound calibrator

Absolute expanded uncertainty : 0.14 dB

Calibrated measurement microphone

Frequency : > 4 kHz to 16 kHz

Microphone type : LS2P

Approved on 18 August 2009

Institute service identifier : SCL/2.2.1-002

CMC ID : APMP-AUV-HK-000005LR-1

Measurement microphones , Pressure sensitivity level

Measurement microphone type LS1P

Absolute expanded uncertainty : 6.0E-2 dB

IEC 61094-2:1992

Frequency : > 6 kHz to 8 kHz

Approved on 18 August 2009

Institute service identifier : SCL/1.1.1-003

CMC ID : APMP-AUV-HK-000005LH-1

Measurement microphones , Pressure sensitivity level

Microphone types LS2, WS2 only

Absolute expanded uncertainty : 0.1 dB

IEC 61094-5:2001

Frequency : 63 Hz to 125 Hz

Approved on 18 August 2009

Institute service identifier : SCL/1.1.1-009

CMC ID : APMP-AUV-HK-000005LN-1

AC voltage (up to the MHz range) , AC voltage up to 1100 V: meters : 0.1 V to 1000 V

AC voltmeter

Absolute expanded uncertainty : 3.0E-3 mV to 5.0E1 mV

Uncertainty table

{"row_1":{"col_1":"","col_2":"20 Hz","col_3":"40 Hz","col_4":"1 kHz","col_5":"10 kHz","col_6":"20 kHz","col_7":"30 kHz","col_8":"50 kHz","col_9":"100 kHz","col_10":"300 kHz","col_11":"500 kHz","col_12":"1 MHz"},"row_2":{"col_1":"100 mV","col_2":"0.003","col_3":"0.003","col_4":"0.003","col_5":"0.003","col_6":"0.003","col_7":"-","col_8":"0.005","col_9":"0.010","col_10":"-","col_11":"-","col_12":"-"},"row_3":{"col_1":"200 mV","col_2":"0.006","col_3":"0.006","col_4":"0.006","col_5":"0.006","col_6":"0.006","col_7":"-","col_8":"0.010","col_9":"0.020","col_10":"-","col_11":"-","col_12":"-"},"row_4":{"col_1":"0.5 V","col_2":"0.0075","col_3":"0.0075","col_4":"0.0075","col_5":"0.0075","col_6":"0.0075","col_7":"-","col_8":"0.0075","col_9":"0.010","col_10":"0.023","col_11":"0.033","col_12":"0.10"},"row_5":{"col_1":"1 V","col_2":"0.011","col_3":"0.011","col_4":"0.011","col_5":"0.011","col_6":"0.011","col_7":"-","col_8":"0.012","col_9":"0.015","col_10":"0.040","col_11":"0.050","col_12":"0.20"},"row_6":{"col_1":"2 V","col_2":"0.026","col_3":"0.026","col_4":"0.026","col_5":"0.026","col_6":"0.026","col_7":"-","col_8":"0.026","col_9":"0.030","col_10":"0.080","col_11":"0.10","col_12":"0.40"},"row_7":{"col_1":"5 V","col_2":"0.055","col_3":"0.055","col_4":"0.055","col_5":"0.055","col_6":"0.055","col_7":"-","col_8":"0.060","col_9":"0.075","col_10":"0.20","col_11":"0.25","col_12":"1.0"},"row_8":{"col_1":"10 V","col_2":"0.13","col_3":"0.13","col_4":"0.13","col_5":"0.13","col_6":"0.13","col_7":"-","col_8":"0.13","col_9":"0.15","col_10":"0.40","col_11":"0.50","col_12":"2.0"},"row_9":{"col_1":"20 V","col_2":"0.28","col_3":"0.28","col_4":"0.28","col_5":"0.28","col_6":"0.28","col_7":"-","col_8":"0.28","col_9":"0.30","col_10":"0.80","col_11":"1.0","col_12":"4.0"},"row_10":{"col_1":"50 V","col_2":"0.65","col_3":"0.65","col_4":"0.65","col_5":"0.65","col_6":"0.65","col_7":"-","col_8":"0.65","col_9":"1.0","col_10":"-","col_11":"-","col_12":"-"},"row_11":{"col_1":"100 V","col_2":"1.5","col_3":"1.5","col_4":"1.5","col_5":"1.5","col_6":"1.5","col_7":"1.5","col_8":"2.0","col_9":"3.0","col_10":"-","col_11":"-","col_12":"-"},"row_12":{"col_1":"200 V","col_2":"3.2","col_3":"3.2","col_4":"3.2","col_5":"3.2","col_6":"4.0","col_7":"4.0","col_8":"5.0","col_9":"9.0","col_10":"-","col_11":"-","col_12":"-"},"row_13":{"col_1":"500 V","col_2":"9.0","col_3":"9.0","col_4":"9.0","col_5":"9.0","col_6":"13","col_7":"15","col_8":"20","col_9":"50","col_10":"-","col_11":"-","col_12":"-"},"row_14":{"col_1":"700 V","col_2":"-","col_3":"14","col_4":"14","col_5":"14","col_6":"21","col_7":"28","col_8":"35","col_9":"-","col_10":"-","col_11":"-","col_12":"-"},"row_15":{"col_1":"1000 V","col_2":"-","col_3":"20","col_4":"15","col_5":"20","col_6":"30","col_7":"40","col_8":"-","col_9":"-","col_10":"-","col_11":"-","col_12":"-"}}

The expanded uncertainty given in this table are expressed in mV

Comparison with AC reference standard

Frequency : 20 Hz to 1 MHz

Approved on 10 November 2014

Institute service identifier : SCL/5.2.2a

CMC ID : APMP-EM-HK-000006SW-1

Radio frequency measurements , Scalar RF reflection coefficient and attenuation: attenuation in coaxials : 0 dB to 80 dB

Passive device, fixed and step attenuator

Absolute expanded uncertainty : 3.9E-2 dB to 7.1 dB

Uncertainty table

{"row_1":{"col_1":"","col_2":"Frequency","col_3":"Expanded uncertainty / dB"},"row_2":{"col_1":"0 dB to 20 dB","col_2":"0.3 MHz to 18 GHz","col_3":"(0.039 + 0.0028A), A in dB"},"row_3":{"col_1":"20 dB to 40 dB","col_2":"300 kHz","col_3":"(0.0049A - 0.055), A in dB"},"row_4":{"col_1":"40 dB to 60 dB","col_2":"1 MHz","col_3":"(0.026A - 0.955), A in dB"},"row_5":{"col_1":"60 dB to 80 dB","col_2":"10 MHz","col_3":"(0.33A - 19.3), A in dB"}}

Network analyser

Frequency : 0.3 MHz to 18 GHz

Connector type : 50 Ω, type-N and PC7

Approved on 10 November 2014

Institute service identifier : SCL/11.2.3b

CMC ID : APMP-EM-HK-000006SK-1

Select Metrology Area

KCDB

CIPM MRA

CLASSIFICATION OF SERVICES