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td1545 verification apparatus of meters for dc electrical energy


功率 / 电能的准确度 0.02 级 / 0.05 级可选

电压输出范围:10 mv ~ 1150 v

电流输出范围:1 ma ~ 600 a

县信号电压输出范围:± ( 10 μv ~ 4.4 v )


td1545 is a multi-function apparatus specially applied to the calibration or verification of meters for dc electrical energy. it is composed of standard dc voltage source, dc current source, dc small signal voltage source, dc measurement unit and so on. the accuracy of power/electrical energy is 0.02/0.05. the apparatus can not only calibrate conventional dc electric meters, but also direct or indirect connected meters for measuring dc electrical energy. reference standards are gb/t 33708-2017 static meter for direct current energy and jjg 842-2017 verification regulation of electronic meters for measuring direct current electrical energy which tianheng participated in drafting. td1845 is suitable for metrology institute, manufacturers, users of meters for dc energy as the standards of dc power and electrical energy.

applications(class 0.02)




●  dc voltage outputthe maximum value is 1150 v,which can meet the requirements of voltage test at 1.15un for 1 kv electrical energy meter.

● dc current output: the maximum value is 600 a,which can be used as current input of direct connected meters for dc energy or indirect connected meters with shunt.

● dc small signal voltage output: the maximum value is +4.4 v, which can be used as the current input (corresponding to shunt voltage) of indirect connected meters for dc energy, and meet the calibration requirements of forward and backward electrical energy meters.

● the minimum output is as low as 10 μv, which is the basis for starting test of electrical energy meter.

● value output modeit has two modes of standard source and output source to facilitate the verification of digital and analogue meter.

● value adjustment modefixed-point, rotary encoder step and potentiometer.

● data analysis function: power stability test, trend curve, statistical analysis, etc.

● human-computer interaction: large size lcd color screen and digital button is adopted, which is convenient to operate and intuitive to display.

● dc signal measurement (option): it is used to measure the dc secondary signal of dc shunt or transmitter.

● proprietary software(option)semi-automatic and full-automatic verification is realized, so as data management and certificate export.

● the annual variation rate of the apparatus is less than 1/3 of the maximum allowable error. 

technical specifications

dc voltage output


output characteristics:

● output range: 10 mv~1150 v

● resolution0.001%*rg,

● display: 7 digits

● protection: short-circuit protection, overload protection

dc current output


output characteristics:

● output range: 1 ma~600 a

● resolution: 0.001%*rgl display:7 digits

● protection: open-circuit protection, overload protection

dc small signal voltage output


output characteristics:

● output range: ± ( 10 μv~4.4 v )

● resolution: 0.002%*rg

● display:7 digits

● protectionshort-circuit protection, overload protection

dc electric energy / power

● accuracy (apparatus of class 0.05): ± 0.05%*rd

   accuracy (apparatus of class 0.02± 0.02%*rd

● output of standard electrical energy pulse (high frequency): full scale value corresponds to 60 khz.

   output of standard electrical energy pulse(low frequency): full scale value corresponds to 6 hz.

   pulse output frequency jitter: < 10 μs

● input of standard electric energy pulse: high frequency pulse less than or equal to 150khz with the amplitude of 5 v can be received.

● the electrical energy error is automatically displayed with a resolution of 0.0001%.

dc signal measurement (option)


output characteristics:

● voltage measurement range0.1 mv~12 v 

● current measurement range20 μa~24 ma

● range switching: automatic or manual. 

● display: 7 digits

general specifications

 line power: ac ( 220 ± 22 ) v,( 50 ± 2 ) hz

● operating environment: 15 ℃~30 ℃,40%~75% r·h,non-condensing

● storage environment: -20 ℃~70 ℃,< 95% r·h,non-condensing

● dimensions(width*depth*height)625 mm × 590 mm × 260 mm

 weight: 53 kg

● standard interface: rs232

selection guidance


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