• Calibration of DC voltmeter and ammeter: the device has a built-in DC voltage standard source with an output range of 10 mV ～ 1550 V and a DC current standard source with an output range of 1 mA ～ 600 A. The voltage and current accuracy of the 0.02 level device reaches 0.01 level, which is applicable to the calibration of DC voltmeter or ammeter of 0.05 level and below.

• Calibration of DC power meter: a virtual power standard source composed of independent DC voltage and current output. The accuracy of a 0.02 level device reaches 0.02 level, which is applicable to the calibration of DC power meters of 0.1 level and below.

• Calibration of DC transmitter (option): The secondary DC signal measurement function of the optional transmitter supports the maximum DC 12 V or 24 mA signal input. With DC voltage, current and power standard sources, the proportional error of the transmitter can be detected.

• Application scenario 1: The maximum DC voltage output is 1550 V, meeting the requirements of 1.15 Un voltage test of 1 kV electrical energy meter; The maximum DC current output is 600 A, meeting the requirements of 1.2 In current test of 100 A electrical energy meter. With the power pulse measurement function, the test of direct connected DC watt hour meters for measuring DC electrical energy can be completed.

• Application scenario 2: The instrument has 10 μV~4.4 V four wire small signal voltage source, with 1550 V DC voltage source and electric energy pulse measurement function, can carry out the verification of indirect access DC electric energy meters.

• Application scenario 3: The maximum output of DC current is up to 600 A, which can be used as the primary current input of the DC shunt. With 1550 V DC voltage source and power pulse measurement function, the overall verification of the DC shunt + indirect connected meters for measuring DC electric energy can be achieved.

☆ Verification of DC shunt (option)

• DC high current standard source: the maximum output is 600 A, which can be used as the primary current input of the DC shunt.

• DC small signal voltmeter: support voltage input range is 10 μV~4.4 V, which can measure the secondary output voltage of the DC shunt.

• Special low thermal potential wire and terminal block: it can reduce the measurement uncertainty introduced by contact potential and thermoelectric potential.

• Verification and test of DC shunt (option): it can measure the resistance value and basic error of the shunt, and draw R (I) and R (t) curve.

• The maximum output of its DC standard voltage source is 1550 V, and the maximum output of its DC standard current source is 600 A. The output range of the DC standard small signal voltage source used for the verification of indirect electric energy meters reaches ±(10μV～4.4 V);

• DC voltage measurement of the instrument up to 12 V, DC current measurement up to 24 mA.

• Four wire small signal voltage source：Precise output ± (10 μV ～ 4.4 V) small signal voltage signal is used as the current input of indirect connected DC energy meters (the specification of shunt can be set and displayed according to its primary current).

• The instrument has a "fixed-point output" mode. The required output value can be directly set by pressing the number keys on the console or clicking the touch screen, and the instrument will automatically switch to the optimal range output.

• In particular, when setting the power, input the voltage value and current value directly (as shown in b above).

• The key operation area is equipped with a "rotary encoder", which can increase or decrease the value output by rotating clockwise or counterclockwise.

• When calibrating electrical measuring instruments, it is usually necessary to select calibration points according to the proportion of each range of the meter being tested;

• The user can select the calibration point of the tested meter through the "percentage verification point" on the touch screen of the instrument.

• The instrument has RS232, LAN and USB communication interfaces, and its software functions can be customized according to customer needs.

Class 0.05

Class 0.02

Class 0.05

Class 0.02

100 mV

1 μV

0.005

3.5 μV

120 + 80

60 + 5 μV

200

< 1.0

300 mV

0.1 μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

1 V

1 μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

3 V

1 μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

10 V

10 μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

30 V

10 μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

100 V

0.1 mV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

300 V

0.1 mV

0.005

0.002

120 + 80

60 + 40

60

< 1.0

600 V

0.1 mV

0.005

0.002

120 + 80

60 + 40

30

< 1.0

1000 V

1 mV

0.005

0.002

120 + 80

60 + 40

15

< 1.0

1500 V[2]

1 mV

0.005

0.002

120 + 80

60 + 40

10

< 1.0

Note [1] : (ppm = parts per million) (e.g., 10ppm = 0.001%).

[2]：1500V range is an option.

Class 0.05

Class 0.02

Class 0.05

Class 0.02

10 mA

0.1 μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

20 mA

10 nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

50 mA

10 nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

100 mA

0.1 μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

200 mA

0.1 μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

500 mA

0.1 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

1 A

1 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

2 A

1 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

5 A

1 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

10 A

10 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

20 A

10 μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

50 A

10 μA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

100 A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

200 A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

500 A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

Note: [3] As the current input of the direct access DC electric energy meter, or the current input of the external shunt of the indirect access DC electric energy meter;

1 mV

10 nV

0.1 μVrms

120 + 0.3 μV

—

< 0.2

3 mV

10 nV

0.3 μVrms

120 + 1 μV

—

< 0.2

10 mV

0.1 μV

1 μVrms

120 + 3 μV

—

< 0.2

30 mV

0.1 μV

0.002

120 + 80

—

< 0.2

100 mV

1 μV

0.002

120 + 80

—

< 0.2

300 mV

1 μV

0.002

120 + 80

≤ 10

< 0.2

1 V

10 μV

0.002

120 + 80

≤ 10

< 0.2

4 V

10 μV

0.002

120 + 80

≤ 10

< 0.2

Note: [3] When the indirect connected DC energy meters is verified separately, it can be used as its current input (corresponding to the shunt voltage)

Accuracy

class 0.05:0.05%*RD

class 0.02:0.02%*RD

Electric energy pulse

Standard Electric Energy Pulse Output

High frequency full range value corresponds to 60 kHz;

Low frequency full range value corresponds to 6 Hz;

Pulse Output Frequency

Output frequency jitter time<10 μ s

Standard Electric Energy Pulse Input

Signal amplitude is 5V, TTL level;

Able to receive high-frequency pulses ≤ 200 kHz;

FH=60 kHz × Power value ÷ voltage range value ÷ current range value

FL=60 kHz ×Power value ÷ voltage range value ÷current range value ÷ 10000

Electric Energy Error Display

Automatic display, resolution 0.0001%

1 V

± (0～1.2) V

60 + 40

10 V

± (0～12) V

60 + 40

2 mA

± (0～2.4) mA

60 + 40

20 mA

± (0～24) mA

60 + 40

Temperature Performance

Working temperature: 15°C～30°C；

Calibration temperature: 18°C～22°C；

Storage temperature: -20°C～70°C

Humidity Performance

Working humidity: < 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C

Storage humidity: (20%～80%) R·H, No condensation

Interface

RS232, USB, LAN