CLAS Certificate Number 2015-01

Electrical

Measured Quantity & Range or Instrument	Expanded Measurement Uncertainty	Type	Remarks
Voltage, DC
0 mV to 220 mV	7.5 µV/V + 0.4 μV	II	Source. For the calibration of dc tbAvoltage measuring devices using a multifunction calibrator.
220 mV to 2.2 V	5 µV/V + 0.7 μV
2.2 mV to 11 V	3.5 µV/V + 2.5 μV
11 mV to 22 V	3.5 µV/V + 4 μV
22 V to 220 V	5 µV/V + 40 μV
220 V to 1100 V	6.5 µV/V + 400 μV
0 V to 100 mV	9 µV/V + 0.3 μV	II	Measure. For the calibration of dc tbAvoltage generating devices using a digital multimeter.
100 mV to 1 V	8 µV/V + 0.3 μV
1 V to 10 V	8 µV/V + 0.5 μV
10 V to 100 V	10 µV/V + 30 μV
100 V to 1000 V	10 µV/V + 100 μV
Current, DC
0 μA to 220 μA	40 µA/A + 6 nA	II	Source. For the calibration of dc tbAcurrent measuring devices using a multifunction calibrator.
220 μA to 2.2 mA	35 µA/A + 7 nA
2.2 mA to 22 mA	35 µA/A + 40 nA
22 mA to 100 mA	45 µA/A + 0.7 µA
100 mA to 220 mA	45 µA/A + 0.7 µA + 200·I2 µA/A
220 mA to 1 A	80 µA/A + 12 µA
1 A to 2.2 A	80 µA/A + 12 µA + 10·I2 µA/A
2.2 A to 11 A	360 µA/A + 480 µA
0 to 100 nA	30 µA/A + 40 pA	II	Measure. For the calibration of dc tbAcurrent generating devices using a digital multimeter.
100 nA to 1 μA	20 µA/A + 40 pA
1 μA to 10 μA	20 µA/A + 0.1 nA
10 μA to 100 μA	20 µA/A + 0.8 nA
100 μA to 1 mA	20 µA/A + 5 nA
1 mA to 10 mA	20 µA/A + 50 nA
10 mA to 100 mA	35 µA/A + 0.5 μA
100 mA to 1 A	110 µA/A + 10 μA
Resistance
0 Ω	40 μΩ	II	Source. For the calibration of tbAresistance measurement devices using a multifunction calibrator.
1 Ω	95 μΩ/Ω
1.9 Ω	95 μΩ/Ω
10 Ω	23 μΩ/Ω
19 Ω	23 μΩ/Ω
100 Ω	10 μΩ/Ω
190 Ω	10 μΩ/Ω
1 kΩ	6.5 μΩ/Ω
1.9 kΩ	6.5 μΩ/Ω
10 kΩ	6.5 μΩ/Ω
19 kΩ	6.5 μΩ/Ω
100 kΩ	8.5 μΩ/Ω
190 kΩ	8.5 μΩ/Ω
1 MΩ	13 μΩ/Ω
1.9 MΩ	18 μΩ/Ω
10 MΩ	40 μΩ/Ω
19 MΩ	47 μΩ/Ω
100 kΩ	100 μΩ/Ω
0.47 Ω to 10 Ω	15 μΩ/Ω + 50 μΩ	II	Measure capability using a digital multimeter.
10 Ω to 100 Ω	12 μΩ/Ω + 0.5 mΩ
100 Ω to 1 kΩ	10 μΩ/Ω + 0.5 mΩ
1 kΩ to 10 kΩ	10 μΩ/Ω + 5 mΩ
10 kΩ to 100 kΩ	10 μΩ/Ω + 50 mΩ
100 kΩ to 1 mΩ	15 μΩ/Ω + 2 Ω
1 mΩ to 10 mΩ	50 μΩ/Ω + 100 Ω
10 mΩ to 100 mΩ	500 μΩ/Ω + 1 kΩ
100 mΩ to 1GΩ	5000 μΩ/Ω + 10 kΩ

Measured Quantity & Range or Instrument	Frequency	Expanded Measurement Uncertainty	Type	Remarks
Voltage, AC
220 μV to 1100 V	10 Hz to 100 kHz	46 uV/V to 1.2 %	II	Source. For the calibration of sinewave voltage measurement devices using a multifunction calibrator. See Annex A for details.
1 mV to 700 V	10 Hz to 100 kHz	90 uV/V to 16 %	II	Measure. For the calibration of voltage sources using a digital multimeter. See Annex C for details.
Current, AC
10 μA to 11 A	10 Hz to 10 kHz	140 uA/A to 0.78 %	II	Source. For the calibration of sinewave current measurement devices using a multifunction calibrator. See Annex B for details.
10 μA to 1 A	10 Hz to 10 kHz	500 uA/A to 1.4 %	II	Measure. For the calibration of current sources using a digital multimeter. See Annex D for details.

Time and Frequency

Measured Quantity & Range or Instrument	Expanded Measurement Uncertainty	Type	Remarks
Frequency measure
1 Hz to 10 MHz	0.02 µHz/Hz + 2 µHz	II	Measure for the calibration of frequency sources devices using a GPS Frequency standard
Frequency source, fixed output
1 Hz, 2 Hz, 5 Hz 10 Hz, 20 Hz, 50 Hz 100 Hz, 200 Hz, 500 Hz 1 kHz, 2 kHz 10 kHz, 20 kHz, 50 kHz 100 kHz, 200 kHz, 500 kHz 1 MHz, 2 MHz, 5 MHz, 10 MHz	0.02 µHz/Hz + 2 µHz	II	Source for the calibration of frequency measuring devices using a GPS Frequency standard
Frequency source, variable output
10 Hz to 2 MHz	1 µHz/Hz + 1 µHz	II	Source for the calibration of frequency measuring devices using a GPS Frequency standard
5 MHz to 10 MHz	0.02 µHz/Hz + 2 µHz

Pressure

Measured Quantity & Range or Instrument	Expanded Measurement Uncertainty	Type	Remarks
Hydraulic pressure measurement
1.3 MPa to 137.8 MPa	0.005 % + 80 Pa	II	For the calibration of pressure measuring devices by comparison against primary standard pressure balance DH5304
200 psi to 20000 psi	0.005 % + 0.012 psi
0 MPa to 275.8 MPa	0.18 MPa	II	For the calibration of pressure measuring devices by comparison against Reference gauge 685
0 psi to 40000 psi	26 psi
Low gauge pressure measurement, pneumatic
0 Pa to 750 Pa	0.009 % + 0.064 Pa	II	For the calibration of pressure measuring devices by comparison against low pressure controller Ruska 7250 LP
0 in H2O to 3 in H2O	0.009 % + 0.00026 in H2O
750 Pa to 3750 Pa	0.010 % + 0.051 Pa
3 in H2O to 15.1 in H2O	0.010 % + 0.00020 in H2O
3750 Pa to 7500 Pa	0.010 % + 0.038 Pa
15.1 in H2O to 30 in H2O	0.010 % + 0.00015 in H2O
Gauge pressure measurement, pneumatic
0 kPa to 500 kPa	0.0060 % + 7 Pa	II	For the calibration of pressure measuring devices by comparison against digital piston gauge DH DPG10G
0 psi to 72.5 psi	0.0060 % + 0.0010 psi
0 kPa to 2000 kPa	0.0060 % + 24 Pa
0 psi to 290 psi	0.0060 % + 0.0035 psi
0 kPa to 5000 kPa	0.0060 % + 58 Pa
0 psi to 725 psi	0.0060 % + 0.0084 psi
0 kPa to 17236 kPa	0.0060 % + 220 Pa
0 psi to 2500 psi	0.0060 % + 0.032 psi
Gauge pressure measurement, pneumatic
1.4 kPa to 172 kPa	0.0025 % + 0.04 Pa	II	For the calibration of pressure measuring devices by comparison against primary piston gauge Ruska 2465
0.2 psi to 25 psi	0.0025 % + 0.000006 psi
12 kPa to 700 kPa	0.0025 % + 1.5 Pa
1.7 psi to 100 psi	0.0025 % + 0.00022 psi
14 kPa to 3500 kPa	0.0030 % + 1.5 Pa
2 psi to 500 psi	0.0030 % + 0.00022 psi
14 kPa to 7000 kPa	0.0030 % + 5 Pa
2 psi to 1000 psi	0.0030 % + 0.00073 psi
Absolute pressure measurement, pneumatic
1.4 kPa to 172 kPa	0.0025 % + 0.7 Pa	II	For the calibration of pressure measuring devices by comparison Direct comparison against primary piston gauge (Ruska 2465).
0.2 psi to 25 psi	0.0025 % + 0.0001 psi
12 kPa to 700 kPa	0.0025 % + 1.5 Pa
1.7 psi to 100 psi	0.0025 % + 0.00022 psi
14 kPa to 3500 kPa	0.0030 % + 1.5 Pa
2 psi to 500 psi	0.0030 % + 0.00022 psi
14 kPa to 7000 kPa	0.0030 % + 5 Pa
2 psi to 1000 psi	0.0030 % + 0.00073 psi

Electrical Calibration of Temperature Indicators and Simulators

Measured Quantity & Range or Instrument	Expanded Measurement Uncertainty	Type	Remarks
Thermocouple simulation with cold junction compensation
Type B
600 °C to 800 °C	0.21 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
800 °C to 900 °C	0.16 °C
900 °C to 1550 °C	0.15 °C
1550 °C to 1820 °C	0.11 °C
Type E
-250 °C to -100 °C	0.58 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.12 °C
-25 °C to 350 °C	0.10 °C
350 °C to 1000 °C	0.08 °C
Type J
-210 °C to -100 °C	0.25 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -30 °C	0.12 °C
-30 °C to 150 °C	0.10 °C
150 °C to 1200 °C	0.09 °C
Type K
-200 °C to -100 °C	0.25 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.13 °C
-25 °C to 1000 °C	0.10 °C
1000 °C to 1372 °C	0.12 °C
Type N
-200 °C to -100 °C	0.27 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.13 °C
-25 °C to 410 °C	0.11 °C
410 °C to 1300 °C	0.08 °C
Type R
-50 °C to 0 °C	0.36 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
0 °C to 250 °C	0.25 °C
250 °C to 900 °C	0.14 °C
900 °C to 1768 °C	0.11 °C
Type S
-50 °C to 0 °C	0.34 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
0 °C to 250 °C	0.25 °C
250 °C to 900 °C	0.15 °C
900 °C to 1768 °C	0.13 °C
Type T
-250 °C to -150 °C	0.61 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-150 °C to 0 °C	0.17 °C
0 °C to 120 °C	0.10 °C
120 °C to 400 °C	0.08 °C
Thermocouple simulation without cold junction compensation
Type B
600 °C to 800 °C	0.12 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
800 °C to 900 °C	0.09 °C
900 °C to 1550 °C	0.09 °C
1550 °C to 1820 °C	0.07 °C
Type E
-250 °C to -100 °C	0.08 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.02 °C
-25 °C to 350 °C	0.02 °C
350 °C to 1000 °C	0.02 °C
Type J
-210 °C to -100 °C	0.04 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -30 °C	0.02 °C
-30 °C to 150 °C	0.02 °C
150 °C to 1200 °C	0.02 °C
Type K
-200 °C to -100 °C	0.05 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.03 °C
-25 °C to 1000 °C	0.03 °C
1000 °C to 1372 °C	0.03 °C
Type N
-200 °C to -100 °C	0.07 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-100 °C to -25 °C	0.04 °C
-25 °C to 410 °C	0.03 °C
410 °C to 1300 °C	0.03 °C
Type R
-50 °C to 0 °C	0.19 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
0 °C to 250 °C	0.13 °C
250 °C to 900 °C	0.08 °C
900 °C to 1768 °C	0.07 °C
Type S
-50 °C to 0 °C	0.18 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
0 °C to 250 °C	0.13 °C
250 °C to 900 °C	0.08 °C
900 °C to 1768 °C	0.08 °C
Type T
-250 °C to -150 °C	0.12 °C	II	Source/Measure. For the calibration of thermocouple indicators and simulators by electrical simulation and measurement using reference calibrator or multimeter.
-150 °C to 0 °C	0.03 °C
0 °C to 120 °C	0.02 °C
120 °C to 400 °C	0.02 °C
RTD simulation
−200 °C to 850 °C	0.0034 °C to 0.026 °C	II	For the calibration of Pt100 (375), Pt100 (385), Pt100 (389), Pt100 (391), Pt100 (3926) RTD indicators and simulators by electrical simulation of temperature.

Thermometry

Measured Quantity & Range or Instrument	Expanded Measurement Uncertainty	Type	Remarks
-40 °C to -25 °C	0.032 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
-25 °C to 70 °C	0.015 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a liquid bath.
70 °C to 155 °C	0.032 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
155 °C to 250 °C	0.087 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
250 °C to 650 °C	0.2 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
650 °C to 1100 °C	2 °C	II	For the calibration of RTD with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
-40 °C to 250 °C	0.6 °C	II	For the calibration of type K and type N thermocouples with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
250 °C to 650 °C	1.3 °C
650 °C to 1200 °C	3.1 °C
-40 °C to 650 °C	0.5 °C	II	For the calibration of type R and type S thermocouples with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
650 °C to 1200 °C	2.0 °C
-40 °C to 150 °C	0.8 °C	II	For the calibration of type J, type E, and type T thermocouples with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.
150 °C to 250 °C	1.3 °C
250 °C to 400 °C	2.0 °C
400 °C to 650 °C	3.3 °C
0 °C to 30 °C	0.075 °C	II	For the calibration of type J, type K, and type T thermocouples with or without temperature indicators by comparison against the laboratory temperature standard in a dry block.

Annex A

Best Uncertainty, ± {(μV/V of sourced ac voltage) + residual}, of AC voltage generation for the calibration of voltage measuring devices

Voltage, AC	Frequency
	10 Hz to 20 Hz	20 Hz to 40 Hz	40 Hz to 20 kHz	20 kHz to 50 kHz	50 kHz to 100 kHz	100 kHz to 300 kHz	300 kHz to 500 kHz	500 kHz to 1 MHz
220 μV to 2.2 mV	240 μV/V + 4 μV	90 μV/V + 4 μV	80 μV/V + 4 μV	200 μV/V + 4 μV	500 μV/V + 5 μV	1050 μV/V + 10 μV	1400 μV/V + 20 μV	2700 μV/V + 20 μV
2.2 mV to 22 mV	240 μV/V + 4 μV	90 μV/V + 4 μV	80 μV/V + 4 μV	200 μV/V + 4 μV	500 μV/V + 5 μV	1050 μV/V + 10 μV	1400 μV/V + 20 μV	2700 μV/V + 20 μV
22 mV to 220 mV	240 μV/V + 12 μV	90 μV/V + 7 μV	57 μV/V + 7 μV	120 μV/V + 7 μV	310 μV/V + 17 μV	655 μV/V + 20 μV	1400 μV/V + 25 μV	2700 μV/V + 45 μV
220 mV to 2.2 V	240 μV/V + 40 μV	90 μV/V + 15 μV	42 μV/V + 8 μV	67 μV/V + 10 μV	85 μV/V + 30 μV	336 μV/V + 80 μV	1000 μV/V + 200 μV	1700 μV/V + 300 μV
2.2 V to 22 V	240 μV/V + 400 μV	90 μV/V + 150 μV	42 μV/V + 50 μV	67 μV/V + 100 μV	83 μV/V + 200 μV	254 μV/V + 600 μV	1000 μV/V + 2000μV	1500 μV/V + 3200 μV
22 V to 220 V	240 μV/V + 4 mV	90 μV/V + 1.5 mV	52 μV/V + 0.6 mV	80 μV/V + 1 mV	150 μV/V + 2.5 mV	900 μV/V + 16 mV	4400 μV/V + 40 mV	8000 μV/V + 80 mV

Best Uncertainty, ± {(μV/V of sourced ac voltage) + residual}, of AC voltage generation for the calibration of voltage measuring devices

Best Uncertainty, ± {(μV/V of sourced ac voltage) + residual}, of AC voltage generation for the calibration of voltage measuring devices

Voltage, AC	Frequency
	40 Hz to 1 kHz	1 kHz to 20 kHz	20 kHz to 30 kHz	30 kHz to 50 kHz	50 kHz to 100 kHz
220 V to 1100 V	90 + 4 mV	165 + 6 mV	600 + 11 mV
220 V to 750 V				600 + 11 mV	2300 + 45 mV

Annex B

Best Uncertainty, ± {(μA/A of sourced ac current) + residual}, of AC current generation for the calibration of voltage measuring devices

Current, AC	Frequency
	10 Hz to 20 Hz	20 Hz to 40 Hz	40 Hz to 1 kHz	1 kHz to 5 kHz	5 kHz to 10 kHz
10 μA to 220 μA	250 μA + 16 nA	160 μA + 10 nA	103 μA + 8 nA	280 μA + 12 nA	1100 μA + 65 nA
220 μA to 2.2 mA	250 μA + 40 nA	160 μA + 35 nA	103 μA + 35 nA	200 μA + 110 nA	1100 μA + 650 nA
2.2 mA to 22 mA	250 μA + 400 nA	160 μA + 350 nA	103 μA + 350 nA	200 μA + 550 nA	1100 μA + 5000 nA
22 mA to 220 mA	250 μA + 4 uA	160 μA + 3.5 uA	103 μA + 2.5 uA	200 μA + 3.5 uA	1100 μA + 10 uA
220 mA to 2.2 A		244 μA + 35 uA	244 μA + 35 uA	450 μA + 80 uA	7000 μA + 160 uA
2.2 V to 11 A			460 μA + 170 uA	950 μA + 380 uA	3600 μA + 750 uA

Annex C

Best Uncertainty, ± {(% of measured AC voltage) + residual}, of AC voltage measurement for the calibration of voltage generating devices

Voltage, AC	Frequency
	1 Hz to 40 Hz	40 Hz to 1 kHz	1 kHz to 20 kHz	20 kHz to 50 kHz	50 kHz to 100 kHz	100 kHz to 300 kHz
1 mV to 10 mV	0.03 % + 3 μV	0.02 % + 1.1 μV	0.03 % + 1.1 μV	0.1 % + 1.1 μV	0.5 % + 1.1 μV	4 % + 2 μV
10 mV to 100 mV	0.007 % + 4 μV	0.007 % + 2 μV	0.014 % + 2 μV	0.03 % + 2 μV	0.08 % + 2 μV	0.3 % + 10 μV
100 mV to 1 V	0.007 % + 40 μV	0.007 % + 20 μV	0.014 % + 20 μV	0.03 % + 20 μV	0.08 % + 20 μV	0.3 % + 100 μV
1 V to 10 V	0.007 % + 400 μV	0.007 % + 200 μV	0.014 % + 200 μV	0.03 % + 200 μV	0.08 % + 200 μV	0.3 % + 1000 μV
10 V to 100 V	0.02 % + 4000 μV	0.02 % + 2000 μV	0.02 % + 2000 μV	0.035 % + 2000 μV	0.12 % + 2000 μV	0.4 % + 10000 μV
100 V to 700 V	0.04 % + 40000 μV	0.04 % + 20000 μV	0.06 % + 20000 μV	0.12 % + 20000 μV	0.3 % + 20000 μV

Best Uncertainty, ± {(% of measured AC voltage) + residual}, of AC voltage measurement for the calibration of voltage generating devices

Voltage, AC	Frequency
	300 kHz to 1 MHz	1 MHz to 2 MHz	2 MHz to 4 MHz	4 MHz to 8 MHz	8 MHz to 10 MHz
1 mV to 10 mV	1.2 % + 5 μV	7 % + 7 μV	7 % + 7 μV	20 % + 8 μV
10 mV to 100 mV	1 % + 10 μV	1.5 % + 10 μV	4 % + 70 μV	4 % + 80 μV	15 % + 100 μV
100 mV to 1 V	1 % + 100 μV	1.5 % + 100 μV	4 % + 700 μV	4 % + 800 μV	15 % + 1000 μV
1 V to 10 V	1 % + 1000 μV	1.5 % + 1000 μV	4 % + 7000 μV	4 % + 8000 μV	15 % + 10000 μV
10 V to 100 V	1.5 % + 10000 μV

Annex D

Best Uncertainty, ± {(% of measured AC current) + residual}, of AC current measurement for the calibration of current generating devices

Current, AC	Frequency
	10 Hz to 20 Hz	20 Hz to 45 Hz	45 Hz to 100 Hz	100 Hz to 5 kHz	5 kHz to 20 kHz	20 kHz to 50 kHz	50 kHz to 100 kHz
10 μA to 100 μA	0.4 % + 0.03 μA	0.15 % + 0.03 μA	0.06 % + 0.03 μA	0.06 % + 0.03 μA
100 μA to 1 mA	0.4 % + 0.2 μA	0.15 % + 0.2 μA	0.06 % + 0.2 μA	0.03 % + 0.2 μA	0.06 % + 0.2 μA	0.4 % + 0.4 μA	0.55 % + 1.5 μA
1 mA to 10 mA	0.4 % + 2 μA	0.15 % + 2 μA	0.06 % + 2 μA	0.03 % + 2 μA	0.06 % + 2 μA	0.4 % + 4 μA	0.55 % + 15 μA
10 mA to 100 mA	0.4 % + 20 μA	0.15 % + 20 μA	0.06 % + 20 μA	0.03 % + 20 μA	0.06 % + 20 μA	0.4 % + 40 μA	0.55 % + 150 μA
100 mA to 1 A	0.4 % + 200 μA	0.16 % + 200 μA	0.08 % + 200 μA	0.1 % + 200 μA	0.3 % + 200 μA	1 % + 400 μA