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TD1545 DC Watt-hour Meter Verification Device

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Product Overview

TD1545 is a multi-function instrument dedicated to the verification or calibration of DC electrical instruments. It is composed of DC voltage standard source, DC current standard source, DC small signal voltage source, DC measurement unit and so on. It has two specifications of 0.02/0.05. The instrument can not only verify conventional DC measuring instruments such as DC voltmeter / ammeter / power meter, but also verify DC shunt, direct access DC watt-hour meter and indirect access DC watt-hour meter.


Reference standard: GB/T 33708-2017《 static DC watt-hour meter, JJG 842-2017《 electronic DC watt-hour meter verification regulation (Tianheng measurement and control participate in drafting), suitable for all levels of measurement departments, manufacturers, DC watt-hour meter users as DC power / electric energy detection standards.


Main Application (0.02 class)

  • Verification or calibration of DC voltmeters and ammeters of class 0.05 and below

  • Verification or calibration of DC power meters of Class 0.1 and below

  • Verification of direct access DC watt-hour meters of Class 0.1 and below

  • Verification of a DC watt-hour meter connected to a shunt of Class 0.1 and below

  • Verification or calibration of DC shunt of Class 0.1 or less

  • Verification or calibration of 0.1 and below DC transmitters (selectors)


Functional Characteristics

  • DC voltage output: up to 1150 V, meet the requirements of 1 kV watt-hour meter 1.15 Un voltage test.

  • DC current output: up to 600 A, can be used as the current input of direct access DC watt-hour meter, or the current input of indirect access DC watt-hour meter with shunt.

  • DC small signal voltage output / measurement: up to ±4.4 V, output as indirect access DC watt-hour meter current input (corresponding to shunt voltage). The measuring end can be used to measure the secondary voltage of the shunt to detect its error.

  • The four-wire Kelvin connection between the low potential terminal and the wire can minimize the influence of thermoelectric potential or contact potential on electric energy measurement.

  • Value output mode: with standard source and output source two modes, convenient digital meter and pointer analog meter verification.

  • Value adjustment mode: with "fixed-point output, rotary encoder, step ratio" and other ways.

  • Data analysis function: electricity stability test, trend change curve, statistical analysis, etc.

  • Human-machine operation function: with large size LCD screen, visual display, touch + digital button convenient operation mode.

  • DC small signal measurement (optional): used to measure the secondary DC signal of the transmitter to detect its error.

  • Special software (options): support semi-automatic or automatic verification, data management and certificate export.




4. technical specifications

4.1 DC voltage output DCV

Range

Resolution

Short-term stability

(%/ min)

Measurement uncertainty (k=2)

(ppm*RD   +ppm*RG)1

Maximum load current (mA)

ripple

Coefficient

( % )

0.05 level

0.02

0.05 level

0.02

100 m V

0.1μV

0.005

0.002

120 + 80

60+5μV

200

< 1.0

300 m V

0.1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

1V

1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

3V

1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

10V

10μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

30V

10μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

100V

0.1 mV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

300V

0.1 mV

0.005

0.002

120 + 80

60 + 40

60

< 1.0

600V

0.1 mV

0.005

0.002

120 + 80

60 + 40

30

< 1.0

1000V

1mV

0.005

0.002

120 + 80

60 + 40

15

< 1.0

Note :1 RD read value,   RG range value

  • Output range :10 mV ~1150 V,7 display

  • Protection function: short circuit protection, overload protection

4.2 DC Current Output DC I②

Range

Resolution

Short-term stability

(%/ min)

Measurement uncertainty (k=2)

(ppm*RD   +ppm*RG)3

Maximum   load voltage (V)

ripple

(%)   coefficient

0.05 level

0.02

0.05 level

0.02

10m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

20m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

50 m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

100 m A

0.1μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

200m A

0.1μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

500m A

0.1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

1A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

2A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

5A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

10A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

20A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

50A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

100A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

200A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

500A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

Note :2 as current   input of direct access DC watt-hour meter or current input of external shunt   of indirect access DC watt-hour meter RD read value RG range value

  • Output range :1 mA ~600 A,7 bit display

  • Protection function: short circuit protection, overload protection

4.3 DC small signal voltage output/measurement DC IU④

Range

Resolution

Short-term   stability

(%/   min)

Measurement uncertainty (k=2)(ppm*RD +ppm*RG )5

Maximum   load

Current   (mA)

(%)   of ripple coefficients

m V 1

10nV

1μV rms

120+2μV

≤   10

< 0.5

3 m V 3

10nV

1μV rms

120+2μV

≤   10

< 0.5

m V 10

0.1μV

1μV rms

120+2μV

≤   10

< 0.5

30 m V

0.1μV

0.005

120 + 80

≤   10

< 0.5

100 m V

1μV

0.005

120 + 80

≤   10

< 0.5

300 m V

1μV

0.005

120 + 80

≤   10

< 0.5

1V

10μV

0.005

120 + 80

≤   10

< 0.5

4V

10μV

0.005

120 + 80

≤   10

< 0.5

Note :4 When verifying   an indirect access watt-hour meter separately, it can be used as its current   input

When the DC shunt is   directly calibrated, it can be used to measure the secondary voltage of the   shunt.

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

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

  • Protection function: short circuit protection, overload protection


4.4 DC Power Indicator data

  • Annual measurement uncertainty of DC power (0.05 level device):0.05%* RD

  • Annual measurement uncertainty for DC power (0.02 stage):0.02%* RD

  • Standard power pulse output (high frequency): full range value corresponds to 60 kHz

  • Standard power pulse output (low frequency): full range value corresponds to 6 Hz

  • Pulse output frequency jitter :<10μs

  • Standard power pulse input: can receive ≤200 kHz high frequency pulse, input level ≤5 V

  • Automatic display of power error with resolution of 0.0001 per cent

4.5 DC small signal measurement (optional)

Voltage/current range

Scope of measurement

Best measure uncertainty (k=2)

(ppm*RD +ppm*RG )6

1V

±(0~1.2) V

60 + 40

10V

±(0~12) V

60 + 40

2mA

±(0~2.4) mA

60 + 40

20mA

±(0~24) mA

60 + 40

Note 5: this function   is used to measure the secondary DC signal of the transmitter; Note 6: RD is   read value, RG is range value

5 General technical specifications

  • Power supply: AC (220±22) V, (50±10) Hz( Customize according to the situation)

  • Working environment :15℃~30℃,40~75 per cent

  • Storage environment :-20℃~70℃,<95% not exposed

  • Size :625 mm (W)×590 mm (D)×260mm(H)

  • Equipment weight: approximately 53 kg

  • Communication interface: RS232 interface USB interface, RJ45 interface





Technical Specifications


DC voltage output DCV

Range

Resolution

Short-term stability

(%/ min)

Measurement uncertainty (k=2)

(ppm*RD   +ppm*RG)1

Maximum load current (mA)

ripple

Coefficient

( % )

0.05 level

0.02

0.05 level

0.02

100 m V

0.1μV

0.005

0.002

120 + 80

60+5μV

200

< 1.0

300 m V

0.1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

1V

1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

3V

1μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

10V

10μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

30V

10μV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

100V

0.1 mV

0.005

0.002

120 + 80

60 + 40

200

< 1.0

300V

0.1 mV

0.005

0.002

120 + 80

60 + 40

60

< 1.0

600V

0.1 mV

0.005

0.002

120 + 80

60 + 40

30

< 1.0

1000V

1mV

0.005

0.002

120 + 80

60 + 40

15

< 1.0

Note :1 RD read value,   RG range value

  • Output range :10 mV ~1150 V,7 display

  • Protection function: short circuit protection, overload protection


DC Current Output DC I②

Range

Resolution

Short-term stability

(%/ min)

Measurement uncertainty (k=2)

(ppm*RD   +ppm*RG)3

Maximum   load voltage (V)

ripple

(%)   coefficient

0.05 level

0.02

0.05 level

0.02

10m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

20m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

50 m A

10nA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

100 m A

0.1μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

200m A

0.1μA

0.005

0.003

120 + 80

60 + 40

12

< 0.5

500m A

0.1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

1A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

2A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

5A

1μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

10A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

20A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 0.5

50A

10μA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

100A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

200A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

500A

0.1 mA

0.005

0.003

120 + 80

60 + 40

3

< 1.0

Note :2 as current   input of direct access DC watt-hour meter or current input of external shunt   of indirect access DC watt-hour meter RD read value RG range value

  • Output range :1 mA ~600 A,7 bit display

  • Protection function: short circuit protection, overload protection


DC small signal voltage output/measurement DC IU④

Range

Resolution

Short-term   stability

(%/   min)

Measurement uncertainty (k=2)(ppm*RD +ppm*RG )5

Maximum   load

Current   (mA)

(%)   of ripple coefficients

m V 1

10nV

1μV rms

120+2μV

≤   10

< 0.5

3 m V 3

10nV

1μV rms

120+2μV

≤   10

< 0.5

m V 10

0.1μV

1μV rms

120+2μV

≤   10

< 0.5

30 m V

0.1μV

0.005

120 + 80

≤   10

< 0.5

100 m V

1μV

0.005

120 + 80

≤   10

< 0.5

300 m V

1μV

0.005

120 + 80

≤   10

< 0.5

1V

10μV

0.005

120 + 80

≤   10

< 0.5

4V

10μV

0.005

120 + 80

≤   10

< 0.5

Note :4 When verifying   an indirect access watt-hour meter separately, it can be used as its current   input

When the DC shunt is   directly calibrated, it can be used to measure the secondary voltage of the   shunt.

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

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

  • Protection function: short circuit protection, overload protection


DC Power Indicator data

  • Annual measurement uncertainty of DC power (0.05 level device):0.05%* RD

  • Annual measurement uncertainty for DC power (0.02 stage):0.02%* RD

  • Standard power pulse output (high frequency): full range value corresponds to 60 kHz

  • Standard power pulse output (low frequency): full range value corresponds to 6 Hz

  • Pulse output frequency jitter :<10μs

  • Standard power pulse input: can receive ≤200 kHz high frequency pulse, input level ≤5 V

  • Automatic display of power error with resolution of 0.0001 per cent


DC small signal measurement (optional)

Voltage/current range

Scope of measurement

Best measure uncertainty (k=2)

(ppm*RD +ppm*RG )6

1V

±(0~1.2) V

60 + 40

10V

±(0~12) V

60 + 40

2mA

±(0~2.4) mA

60 + 40

20mA

±(0~24) mA

60 + 40

Note 5: this function   is used to measure the secondary DC signal of the transmitter; Note 6: RD is   read value, RG is range value


General Technical Specifications

  • Power supply: AC (220±22) V, (50±10) Hz( Customize according to the situation)

  • Working environment :15℃~30℃,40~75 per cent

  • Storage environment :-20℃~70℃,<95% not exposed

  • Size :625 mm (W)×590 mm (D)×260mm(H)

  • Equipment weight: approximately 53 kg

  • Communication interface: RS232 interface USB interface, RJ45 interface


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