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Changsha Tianheng Measurement and Control Technology Co., Ltd
TD1570 Indirect Connection DC Energy Meter Calibration Device
NegotiableUpdate on 05/27
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Overview
TD1570 Indirect Connection DC Energy Meter Calibration Device ◉ TD1570 is a set of platform devices specifically designed for the calibration of indirect connection DC energy meters, with an energy measurement uncertainty of 0.05 level. It mainly consists of a DC voltage standard source, a DC small signal voltage standard source, a multi meter calibration platform, and a fully automatic calibration software. 6 to 16 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).
Product Details
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 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.
Complete the basic error test requirements for small load current (0.01 In ≤ I<0.05 In) of a DC energy meter under reference voltage conditions.
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 voltage output DCV
DC small signal voltage output DCI
Technical specifications for direct current energy
DC energy measurement uncertainty: DC voltage measurement uncertainty+DC small signal voltage measurement uncertainty
Standard power pulse output: High frequency full-scale value corresponds to 60 kHz, low frequency full-scale value corresponds to 6 Hz, frequency jitter<10 μ s
Standard power pulse input: Received pulse frequency: ≤ 150 kHz, input 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/clock daily timing error
Each meter has two power supply modes: AC 220 V (isolated from the power grid), DC ± 24 V, and other types can be customized
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
Measurement uncertainty of device standard clock: 2 × 10-7, with two error display formulas for timing error: s/d and ppm/ppb
Selection Guide
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