Results for: Electricity and Magnetism bulgeria

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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)

Bulgaria, BIM (Bulgarian Institute of Metrology)

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

Multifunction calibrator: R

Relative expanded uncertainty : 1 µΩ/Ω to 5.5E1 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 ohm","col_2":"1"},"row_3":{"col_1":"1.9 ohm","col_2":"1"},"row_4":{"col_1":"10 ohm","col_2":"1"},"row_5":{"col_1":"19 ohm","col_2":"1"},"row_6":{"col_1":"100 ohm","col_2":"1"},"row_7":{"col_1":"190 ohm","col_2":"1"},"row_8":{"col_1":"1 kohm","col_2":"1.5"},"row_9":{"col_1":"1.9 ohm","col_2":"1.5"},"row_10":{"col_1":"10 kohm","col_2":"2.1"},"row_11":{"col_1":"19 kohm","col_2":"2.1"},"row_12":{"col_1":"100 kohm","col_2":"2.4"},"row_13":{"col_1":"190 kohm","col_2":"2.4"},"row_14":{"col_1":"1 Mohm","col_2":"4.5"},"row_15":{"col_1":"19 Mohm","col_2":"4.5"},"row_16":{"col_1":"10 Mohm","col_2":"6.0"},"row_17":{"col_1":"19 Mohm","col_2":"6.0"},"row_18":{"col_1":"100 Mohm","col_2":"55"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Comparison by means of current comparator bridge and automated high resistance bridge

R : decade values and divisible by 1.9

Approved on 06 August 2013

Institute service identifier : 79

CMC ID : EURAMET-EM-BG-00000DTV-1

DC resistance , DC resistance standards and sources: high values : 1.00E7 Ω to 1.00E9 Ω

Fixed resistor: R

Relative expanded uncertainty : 3.2 µΩ/Ω to 1.1E2 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 Mohm","col_2":"3.2"},"row_3":{"col_1":"100 Mohm","col_2":"50"},"row_4":{"col_1":"1 Gohm","col_2":"110"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Comparison by means of automated high resistance bridge

R : decade values

Measurements only at 23 °C in air bath

Approved on 06 August 2013

Institute service identifier : 75

CMC ID : EURAMET-EM-BG-00000DV6-1

Impedance (up to the MHz range) , Capacitance for dielectric capacitors : 0.01 µF to 1 µF

Fixed capacitor

Relative expanded uncertainty : 2.0E1 µF/F to 5.0E1 µF/F

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty in µF/F"},"row_2":{"col_1":"10 nF to 100 nF","col_2":"20 to 30"},"row_3":{"col_1":"200 nF to 1 µF","col_2":"50"}}

Comparison with capacitance bridge

Frequency : 1 kHz

Uncertainty is not varying linearly within the range.

Approved on 07 February 2019

Institute service identifier : 25

CMC ID : EURAMET-EM-BG-00000DU3-1

High voltage and current , High AC current: current transformer phase displacement : -20 mrad to 20 mrad

Current transformer

Absolute expanded uncertainty : 9.0E-2 mrad

Comparison with standard current transformer

Primary : 0.1 A to 5 A

Secondary : 1 A or 5 A

Frequency : 50 Hz

Approved on 06 August 2013

Institute service identifier : 68

CMC ID : EURAMET-EM-BG-00000DTQ-1

DC resistance , DC resistance meters: low values : 1.00E-4 Ω to 1 Ω

Micro-ohmmeter, multimeter: R

Relative expanded uncertainty : 1.2E2 µΩ/Ω to 3 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"0.0001 ohm","col_2":"120"},"row_3":{"col_1":"0.001 ohm","col_2":"70"},"row_4":{"col_1":"0.01 ohm","col_2":"70"},"row_5":{"col_1":"0.1 ohm","col_2":"70"},"row_6":{"col_1":"1 ohm","col_2":"3.0"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Direct measurement

R : decade values

Approved on 06 August 2013

Institute service identifier : 80

CMC ID : EURAMET-EM-BG-00000DTW-1

Impedance (up to the MHz range) , Inductance: self inductance, low values : 0.01 mH to 1 mH

Fixed inductor

Relative expanded uncertainty : 2.0E-2 H/H to 3.0E-4 H/H

Comparison with inductance bridge

Frequency : 1 kHz

Uncertainty is not varying linearly within the range

Approved on 06 August 2013

Institute service identifier : 26

CMC ID : EURAMET-EM-BG-00000DUU-1

High voltage and current , High DC voltage: ratios : 1.00E-5 to 1

High voltage resistive divider, DC high voltage probe

Relative expanded uncertainty : 2.0E-4

Comparison with reference divider

Input voltage : -100 kV to 200 kV

Approved on 06 August 2013

Institute service identifier : 91

CMC ID : EURAMET-EM-BG-00000DUV-1

DC current (up to 100 A) , DC current meters: intermediate values : 1.00E-4 A to 2 A

Multimeter, multifunction transfer standard

Relative expanded uncertainty : 8 µA/A to 5.3E1 µA/A

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"100 µA to 200 µA","col_2":"8"},"row_3":{"col_1":"200 µA to 2 mA","col_2":"13 to 11"},"row_4":{"col_1":"2 mA to 20 mA","col_2":"13 to 8"},"row_5":{"col_1":"20 mA to 200 mA","col_2":"16 to 10"},"row_6":{"col_1":"200 mA to 2 A","col_2":"25 to 53"}}

The expanded uncertainties given in this table are expressed in µA/A

Direct measurement with calibrator

Approved on 06 August 2013

Institute service identifier : 16

CMC ID : EURAMET-EM-BG-00000DU0-1

High voltage and current , High AC voltage: voltage transformer ratio error : -0.2 % to 0.2 %

Voltage transformer

Absolute expanded uncertainty : 9.0E-3 %

Comparison with reference standard

Primary voltage : 2 kV to 100 kV

Secondary voltage : 15 V to 120 V

Frequency : 50 Hz

Approved on 06 August 2013

Institute service identifier : 95

CMC ID : EURAMET-EM-BG-00000DTM-1

Impedance (up to the MHz range) , Capacitance: low loss capacitors : 1.00E-3 nF to 9 nF

Standard capacitor

Relative expanded uncertainty : 0.3 µF/F to 2.0E1 µF/F

Uncertainty table

{"row_1":{"col_1":"Capacitance","col_2":"Type of Standard Capacitors","col_3":"Expanded uncertainty in µF/F"},"row_2":{"col_1":"1 pF to 90 pF","col_2":"air","col_3":"12"},"row_3":{"col_1":"10 pF","col_2":"fused silica, type AH11A","col_3":"1.1"},"row_4":{"col_1":"10 pF","col_2":"fused silica, type GR-1408-A","col_3":"3"},"row_5":{"col_1":"100 pF","col_2":"fused silica, type AH11A","col_3":"0.3"},"row_6":{"col_1":"100 pF","col_2":"fused silica, type GR-1408-B","col_3":"2"},"row_7":{"col_1":"0.1 nF to 9 nF","col_2":"air","col_3":"10 to 20"}}

Comparison with capacitance bridge

Frequency : 1 kHz

Uncertainty is not varying linearly within the range.

Approved on 03 February 2021

Institute service identifier : 24

CMC ID : EURAMET-EM-BG-00000DU2-2

AC current , AC current up to 100 A: sources : 10 A to 20 A

Multifunction calibrator, transconductance amplifier

Relative expanded uncertainty : 3.6E2 µA/A to 3.9E2 µA/A

Uncertainty table

{"row_1":{"col_1":"","col_2":"10 Hz to 55 Hz","col_3":"55 Hz to 1 kHz","col_4":"1 kHz to 5 kHz","col_5":"5 kHz to 10 kHz","col_6":"10 kHz","col_7":"20 kHz"},"row_2":{"col_1":"10 µA to 100 µA","col_2":"-","col_3":"770","col_4":"650","col_5":"770","col_6":"770","col_7":"-"},"row_3":{"col_1":"100 µA to 200 µA","col_2":"-","col_3":"240","col_4":"230","col_5":"240","col_6":"240","col_7":"-"},"row_4":{"col_1":"0.2 mA to 0.3 mA","col_2":"-","col_3":"220","col_4":"200","col_5":"220","col_6":"220","col_7":"-"},"row_5":{"col_1":"0.3 mA to 2 mA","col_2":"-","col_3":"160","col_4":"150","col_5":"160","col_6":"160","col_7":"-"},"row_6":{"col_1":"2 mA to 5 mA","col_2":"50","col_3":"50","col_4":"50","col_5":"50","col_6":"-","col_7":"-"},"row_7":{"col_1":"5 mA to 10 mA","col_2":"40","col_3":"40","col_4":"40","col_5":"40","col_6":"-","col_7":"-"},"row_8":{"col_1":"10 mA to 20 mA","col_2":"30","col_3":"30","col_4":"30","col_5":"30","col_6":"-","col_7":"-"},"row_9":{"col_1":"20 mA to 30 mA","col_2":"50","col_3":"50","col_4":"50","col_5":"50","col_6":"-","col_7":"-"},"row_10":{"col_1":"30 mA to 200 mA","col_2":"35","col_3":"35","col_4":"35","col_5":"35","col_6":"-","col_7":"-"},"row_11":{"col_1":"0.2 A to 0.3 A","col_2":"100","col_3":"100","col_4":"100","col_5":"100","col_6":"-","col_7":"-"},"row_12":{"col_1":"0.3 A to 0.5 A","col_2":"60","col_3":"60","col_4":"60","col_5":"60","col_6":"-","col_7":"-"},"row_13":{"col_1":"0.5 A to 1 A","col_2":"55","col_3":"55","col_4":"55","col_5":"55","col_6":"-","col_7":"-"},"row_14":{"col_1":"1 A to 2 A","col_2":"50","col_3":"50","col_4":"50","col_5":"50","col_6":"-","col_7":"-"},"row_15":{"col_1":"2 A to 3 A","col_2":"160","col_3":"160","col_4":"160","col_5":"160","col_6":"190","col_7":"190"},"row_16":{"col_1":"3 A to 5 A","col_2":"130","col_3":"130","col_4":"130","col_5":"130","col_6":"130","col_7":"180"},"row_17":{"col_1":"5 A to 10 A","col_2":"120","col_3":"120","col_4":"120","col_5":"120","col_6":"120","col_7":"180"},"row_18":{"col_1":"10 A","col_2":"100","col_3":"100","col_4":"100","col_5":"100","col_6":"100","col_7":"190"},"row_19":{"col_1":"10 A to 15 A","col_2":"-","col_3":"390","col_4":"390","col_5":"-","col_6":"-","col_7":"-"},"row_20":{"col_1":"15 A to 20 A","col_2":"-","col_3":"360","col_4":"360","col_5":"-","col_6":"-","col_7":"-"}}

The expanded uncertainties given in this table are expressed in µA/A.

AC/DC transfer

Frequency : 55 Hz to 1 kHz

Approved on 17 May 2021

Institute service identifier : 50

CMC ID : EURAMET-EM-BG-00000MFD-2

AC power , AC power and energy: three phase, active energy : 0 Ws to 5.76E6 Ws

Energy meter

Relative expanded uncertainty : 1.6E1 µWs (VAs)^-1 to 1.4E2 µWs (VAs)^-1

Uncertainty table

{"row_1":{"col_1":"","col_2":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter","col_3":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter","col_4":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter","col_5":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter","col_6":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter ","col_7":"For calibration of power meter, power converter, power comparator, wattmeter and energy meter","col_8":"For calibration of power calibrator"},"row_2":{"col_1":"Power factor","col_2":"4-wire measuring mode \n10 V to 240 V \n0.002 A to 0.05 A","col_3":"4-wire measuring mode \n10 V to 240 V \n0.051 A to 100 A","col_4":"4-wire measuring mode \n241 V to 480 V \n0.002 A to 0.05 A","col_5":"4-wire measuring mode 241 V to 480 V 0.051 A to 100 A ","col_6":"4-wire measuring mode 10 V to 480 V 101 A to 120 A ","col_7":"3-wire measuring mode \n10 V to 480 V \n0.002 A to 100 A","col_8":"4-wire and 3 wire measuring mode \n10 V to 480 V \n0.002 A to 120 A"},"row_3":{"col_1":"1 to 0.8 inductive or capacitive ","col_2":"20","col_3":"16","col_4":"40","col_5":"30","col_6":"140","col_7":"140","col_8":"170"},"row_4":{"col_1":"0.5 inductive or capacitive","col_2":"30","col_3":"25","col_4":"60","col_5":"50","col_6":"140","col_7":"140","col_8":"170"}}

The expanded uncertainties given in this table are expressed in µW/VA, µWs/VAs, µvar/VA, µvars/VAs and µVA/VA

Direct comparison

Voltage : 10 V to 480 V

Current : 0.002 A to 120 A

Power factor : 1 to 0 inductive or capacitive

Measuring time : 1 s to 100 s

Frequency : 46 Hz to 65 Hz

The given range is "per phase"

Approved on 25 April 2021

Institute service identifier : 60

CMC ID : EURAMET-EM-BG-00000MFN-2

DC voltage (up to 1100 V) , DC voltage sources: single values : 1 V to 10 V

Solid state voltage standard

Relative expanded uncertainty : 2 µV/V to 0.2 µV/V

Uncertainty table

{"row_1":{"col_1":" ","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 V","col_2":"2"},"row_3":{"col_1":"1.018 V","col_2":"2"},"row_4":{"col_1":"10 V","col_2":"0.2"}}

The expanded uncertainties are expressed in µV/V

Differential method of comparison

Fixed voltage : 1 V, 1.018 V, 10 V

Approved on 22 July 2023

Institute service identifier : 1

CMC ID : EURAMET-EM-BG-00000DUY-2

Impedance (up to the MHz range) , Inductance: self inductance, intermediate values : 1.00E-3 H to 1 H

Fixed inductor

Relative expanded uncertainty : 5.0E-5 H/H to 4.0E-4 H/H

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 mH","col_2":"5.0E-05"},"row_3":{"col_1":"100 mH","col_2":"1.5E-04"},"row_4":{"col_1":"0.001 H to 1 H","col_2":"3E-04 to 4E-04"}}

The expanded uncertainties given in this table are expressed in H/H

Comparison with inductance bridge

Frequency : 1 kHz

Only for standards with shielded coils. Uncertainty is not varying linearly within the range

Approved on 06 August 2013

Institute service identifier : 29

CMC ID : EURAMET-EM-BG-00000DU5-1

DC resistance , DC resistance standards and sources: low values : 1.00E-4 Ω to 1 Ω

Fixed resistor: R

Relative expanded uncertainty : 0.2 µΩ/Ω to 9 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"0.0001 ohm","col_2":"9.0"},"row_3":{"col_1":"0.001 ohm","col_2":"4.5"},"row_4":{"col_1":"0.01 ohm","col_2":"1.5"},"row_5":{"col_1":"0.1 ohm","col_2":"0.5"},"row_6":{"col_1":"1 ohm","col_2":"0.2"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Comparison by means of current comparator bridge

R : decade values

Measurements only at 23 °C in oil bath

Approved on 06 August 2013

Institute service identifier : 71

CMC ID : EURAMET-EM-BG-00000DV2-1

DC resistance , DC resistance meters: high values : 1.00E10 Ω to 1.00E14 Ω

Teraohmmeter, electrometer: R

Relative expanded uncertainty : 1.1E3 µΩ/Ω to 6.3E3 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"10 Gohm","col_2":"1100"},"row_3":{"col_1":"100 Gohm","col_2":"1300"},"row_4":{"col_1":"1 Tohm","col_2":"1700"},"row_5":{"col_1":"10 Tohm","col_2":"2800"},"row_6":{"col_1":"100 Tohm","col_2":"6300"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Direct measurement

R : decade values

Approved on 06 August 2013

Institute service identifier : 82

CMC ID : EURAMET-EM-BG-00000DTY-1

DC resistance , DC resistance standards and sources: intermediate values : 2 Ω to 1.00E6 Ω

Resistance box

Relative expanded uncertainty : 1.1E1 µΩ/Ω to 2.4E1 µΩ/Ω

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"2 ohm to 10 ohm","col_2":"24 to 20"},"row_3":{"col_1":"20 ohm to 100 ohm","col_2":"16 to 13"},"row_4":{"col_1":"0.2 kohm to 1 kohm","col_2":"13 to 11"},"row_5":{"col_1":"2 kohm to 10 kohm","col_2":"12 to 11"},"row_6":{"col_1":"20 kohm to 100 kohm","col_2":"14 to 11"},"row_7":{"col_1":"0.2 Mohm to 1 Mohm","col_2":"21 to 13"}}

The expanded uncertainties given in this table are expressed in µΩ/Ω

Direct measurement

Measurements in air

Approved on 06 August 2013

Institute service identifier : 74

CMC ID : EURAMET-EM-BG-00000DV5-1

DC current (up to 100 A) , DC current sources: low values : 1.00E-5 A to 1.00E-4 A

Current generator, multifunction calibrator

Relative expanded uncertainty : 1.1E1 µA/A to 7 µA/A

Voltage drop across standard resistor

Approved on 06 August 2013

Institute service identifier : 10

CMC ID : EURAMET-EM-BG-00000DUS-1

High voltage and current , High DC voltage: average value : -100 kV to 200 kV

DC voltage measuring system, DC voltage source

Relative expanded uncertainty : 1.2E1 mV/V

Direct measurement with reference kilovoltmeter

Approved on 14 May 2021

Institute service identifier : 90

CMC ID : EURAMET-EM-BG-00000MFW-2

AC voltage (up to the MHz range) , AC voltage up to 1000 V: meters : 0.01 µV/V to 1000 µV/V

AC voltmeter, multimeter, multifunction transfer standard

Relative expanded uncertainty : 1.5E1 µV/V to 1.3E2 µV/V

Uncertainty table

{"row_1":{"col_1":"","col_2":"10 Hz to 20 Hz","col_3":"20 Hz to 53 Hz","col_4":"53 Hz to 1 kHz","col_5":"1 kHz","col_6":"1 kHz to 20 kHz","col_7":"20 kHz to 50 kHz","col_8":"100 kHz"},"row_2":{"col_1":"10 mV ","col_2":"130","col_3":"100","col_4":"100","col_5":"90","col_6":"90","col_7":"90","col_8":"90"},"row_3":{"col_1":"20 mV","col_2":"120","col_3":"65","col_4":"65","col_5":"65","col_6":"65","col_7":"65","col_8":"65"},"row_4":{"col_1":"50 mV","col_2":"100","col_3":"50","col_4":"50","col_5":"50","col_6":"50","col_7":"60","col_8":"60"},"row_5":{"col_1":"100 mV","col_2":"60","col_3":"50","col_4":"50","col_5":"50","col_6":"50","col_7":"50","col_8":"50"},"row_6":{"col_1":"200 mV","col_2":"50","col_3":"40","col_4":"40","col_5":"40","col_6":"40","col_7":"40","col_8":"40"},"row_7":{"col_1":"0.2 V to 1 V","col_2":"55","col_3":"40","col_4":"40","col_5":"20","col_6":"20","col_7":"40","col_8":"110"},"row_8":{"col_1":"1 V","col_2":"20","col_3":"15","col_4":"15","col_5":"15","col_6":"15","col_7":"30","col_8":"110"},"row_9":{"col_1":"1 V to 20 V ","col_2":"35","col_3":"30","col_4":"30","col_5":"20","col_6":"20","col_7":"35","col_8":"110"},"row_10":{"col_1":"20 V to 200 V","col_2":"35","col_3":"30","col_4":"30","col_5":"30","col_6":"30","col_7":"30","col_8":"60"},"row_11":{"col_1":"200 V to 1000 V","col_2":"-","col_3":"-","col_4":"120","col_5":"100","col_6":"120","col_7":"-","col_8":"-"}}

The expanded uncertainties given in this table are expressed in µV/V

Direct with calibrator

Frequency : 10 Hz to 100 kHz

Minimum value of uncertainty for 1 V

Approved on 25 April 2021

Institute service identifier : 39

CMC ID : EURAMET-EM-BG-00000MFT-2

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