• Application scenario：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 relevant testing work of indirect connected DC energy meters .

• Indirect connected DC energy meters press bracket: a metal terminal corresponding to the wiring hole of the DC electric energy meter is installed under the fixed meter position, and the wiring operation can be completed by pressing the handle.

• Built in clock module with precision up to 0.2 ppm, which can measure the second pulse signal for daily timing error test

• Built in GPS module and antenna can receive GPS standard clock signal.

☆ Auxiliary power supply

•     Each meter position has built-in auxiliary power supply, which can provide DC 24 V or AC 220 V power supply for electronic meters for measuring DC electrical energy(type A).

• Four wire small signal voltage source：Precise output ± (10 μ V ～ 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).

• With RS232 communication interface, software functions can be customized according to customer needs

100 mV

1 μV

0.005

120 + 80

300

< 0.2

300 mV

1 μV

0.005

120 + 80

300

< 0.2

1 V

10 μV

0.005

120 + 80

300

< 0.2

3 V

10 μV

0.005

120 + 80

300

< 0.2

10 V

0.1 mV

0.005

120 + 80

300

< 0.2

30 V

0.1 mV

0.005

120 + 80

300

< 0.2

100 V

1 mV

0.005

120 + 80

300

< 0.2

300 V

1 mV

0.005

120 + 80

150

< 0.2

600 V

1 mV

0.005

120 + 80

50

< 0.2

1000 V

10 mV

0.005

120 + 80

50

< 0.2

1500 V [2]

10 mV

0.005

120 + 80

20

< 0.2

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

[2]：1500V range is an option.

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

Uncertainty of voltage measurement+uncertainty of current measurement (or uncertainty of DC small signal voltage measurement)

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 μs

Standard Electric Energy Pulse Input

Signal amplitude is 5V, TTL level;

Able to receive high-frequency pulses ≤ 150 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%

Difference At Different meter position

< ± 0.025%

Maximum Burden Current

120 mA / meter position

Protection Function

Replaceable fuse protection

AC Power Output

Output Voltage

220 V

Maximum Burden Current

20 mA /meter position

Protection Function

Replaceable fuse protection

Temperature Performance

Working temperature：0°C～45°C；

Calibration temperature：18°C～28°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