TD1570

• Power/electric energy measurement: Class 0.05.

• DC standard voltage source：10 mV～1150 V / 1550 V（option）

• DC small signal voltage source(four-line)：10 μV～4.4 V

• Optional 6/12/16 meter position indirect connected DC energy meters verification platform.

• Standard electric energy pulse input/output, used to detect the working error of electric energy meter

• Auxiliary power supply is used to supply power for electronic meters for measuring DC electrical energy(type A).

• Standard second pulse measurement is used to detect the daily timing error of the electric energy meter

• Mobile measurement and control station, which can observe or control the output through the LCD touch screen

TD1570 is a device dedicated to the verification of indirect connected DC energy meters, which is composed of DC standard voltage source, DC small signal voltage standard source, multi meter location verification platform, verification software, etc. Support the automatic verification of indirect connected DC energy meters.


5. Specifications

5.1 DC Voltage Output

Range

Resolution

Short Term Stability

(% / min)

Accuracy (k=2)

(ppm of reading + ppm of range) [1]

Maximum Burden Current (mA)

Ripple ( % )

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.

• Output range：10 mV～1150 V,    6-bit display

• 1500 V voltage output option can be selected to expand the voltage output range to 10 mV ～ 1550 V

• Protection function: Short circuit protection, overload protection


5.2 DC Small Signal Voltage Output [3]

Range

Resolution

Short Term Stability

(% / min)

Accuracy (k=2)

(ppm of reading + ppm of range)

Maximum Burden Current (mA)

Ripple ( % )

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)

• Output range：± ( 10 μV～4.4 V )，6-bit display

• The specification and current voltage ratio of the shunt can be set, and the output value can be displayed according to the voltage or current converted by the shunts.


5.3 Daily timing error

• Annual measurement uncertainty of device standard clock：2×10-7

• Daily timing error supports two error display modes: s/d and ppm/ppb


5.4 DC electric energy index

DC Power/Electric Energy


Range

Combination of DC voltage and DC current (or DC small signal 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%


☆ Verification of DC Energy Meter

• 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 .

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