Product Introduction

There are two optional specifications for DC power/electrical energy: 0.02 level/0.05 level.
◉⽀ Hold 3-6 direct connected DC energy meters, indirect connected DC energy meters, DC splitters, etc. of the same specifications for automatic calibration simultaneously.
Suitable for use as a DC energy/power detection standard in various levels of metrology departments, power units, instrument manufacturers, energy users, and research institutions.
Reference standards: GB/T 33708-2017 "Static DC Energy Meter", JJG 842-2017 "Calibration Regulations for Electronic DC Energy Meters" (drafted by Tianheng Measurement and Control).

Functional Features

◉ DC voltage output: up to 1150 V, required for a voltage test of 1.15 Un on a full 1 kV energy meter.
◉DC current output: up to 600 A, can be used as a current output for direct connection to an electric energy meter or indirectly connected to an external shunt of an electric energy meter.
◉ DC small signal voltage output: up to ± 4.4 V, can be used as the current input for indirectly connected DC energy meters (corresponding to shunt voltage), and meets the verification requirements for forward and reverse electrical energy.
When checking, using low thermoelectric potential terminals and wires for four wire Kelvin connection can minimize the impact of thermoelectric potential or contact potential on electrical energy measurement.
Auxiliary power supply: It can provide DC ± 24 V or AC 220 V power supply for Class A energy meters (independent power supply type).
Clock verification function: It has the functions of second pulse output/measurement and absolute clock reception, used to calibrate the timing error of the tested meter or perform Beijing time synchronization.
◉ Mobile measurement and control platform: It can observe or control the output of measurement values through its LCD touch screen, and can be manually checked.
◉ Specialized verification software: Full automatic or full automatic calibration of the verified table, data recording, analysis, management, and certificate export.
◉ DC small signal voltmeter (optional): Used to measure the secondary voltage of the DC splitter when checking it separately.
◉ Diverter manual crimping device (TD1550 option): Manually press the current terminal of the tested shunt and connect it to the current source to form a current circuit.
◉ Automatic crimping device for shunt (TD1560 option): The current terminal of the tested shunt is automatically tightened and connected to the current source to form a current circuit.

Main applications (refer to TD1545 for schematic diagram)

◉ Check the direct connection type electric energy meter: Use a DC voltage source and a DC current source for verification.
◉ Indirect connected electric energy meter (without shunt): Use a DC voltage source and a DC small signal voltage source for calibration.
◉ Indirect connected electric energy meter (with shunt): Use a DC voltage source+DC current source (connect the tested electric energy meter and shunt as a whole) for calibration.
◉ Check DC splitter (optional): Use a DC current source and a DC small signal voltmeter for calibration.

DC voltage output DCV

DC small signal voltage output/measurement DCIu

DC current output DCI specification

DC energy index

Optimal measurement uncertainty of electrical energy (0.05 level): 0.05%*RD
Optimal measurement uncertainty of electrical energy (0.02 level): 0.02%*RD
High frequency power pulse output: 60 kHz corresponding to full-scale value
Low frequency power pulse output: Full scale value corresponds to 6 Hz
Frequency jitter<10 μ s
Standard power pulse transmission: ≤ 200 kHz, input voltage level: ≤ 5 V
Automatic display power error with a resolution of 0.0001%

Auxiliary power supply

Each meter has a set of AC and DC power supplies
Power specifications: AC 220 V (isolated from electricity), DC ± 24 V
AC 220V load capacity: 20 mA/meter position, with replaceable fuse protection
DC ± 24 V load capacity: 120 mA/meter position, with short circuit and overload protection
Note: Other types of power supplies can be customized

Clock day timing error

Measurement uncertainty of standard clock: 2×10^-7
Two error display formulas for timing error: s/d and ppm/ppb

DC resistance measurement (shunt calibration option)

Selection Guide