TD1575 DC Energy Meter Calibration Device

Product Introduction

TD1575 is a set of table devices specifically designed for verifying DC energy meters, with two specifications available for DC power/energy: 0.02 level and 0.05 level.
It mainly consists of a DC voltage standard source, a DC current standard source, a DC small signal voltage standard source, a multi meter calibration platform, and a fully automatic calibration software.
6 to 16 directly or indirectly connected DC energy meters can be used for simultaneous automatic calibration, and can be widely applied in fields such as measurement, power, and instrument manufacturing.
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 120 A, meet the requirements of 1.2 In current test for a full 100 A 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.
The measurement uncertainty of millivolt voltage output reaches the level of 1 μ V, and the short-term stability is better than 0.3 μ Vrms/min.
The error test requirements for small load current (0.01 In ≤ I<0.05 In) of indirectly connected energy meters under reference voltage conditions are fully met.
Auxiliary power supply: It can provide DC ± 24 V/48 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 voltage output DCV

DC current output DCI

DC small signal voltage output DCIu

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 frequency: ≤ 150 kHz, transmission voltage level: ≤ 5 V
Automatic display power error with a resolution of 0.0001%
Table difference at different positions: less than ± 0.025%

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, DC ± 48 V
AC 220V load capacity: 30 mA/meter position, with replaceable fuse protection
DC ± 24 V load capacity: 250 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

Selection Guide