1. Measurement accuracy index (only measure 45~65Hz power frequency range signal)

Conditions that meet the error requirements

• Temperature: (23±5)°C

• Humidity: (30~75)%RH

• Input waveform: Sine wave

• Common mode voltage: 0V

• Magnification Setting: Set to OFF

• Preheat for 30 minutes

Gauge specifications

The performance indicators of the tester in numerical form are within the specified tolerances. Within 30 minutes of power-on and 2 full data acquisition cycles, the tester met the specified accuracy. Performance metrics are based on a one-year calibration cycle.

Gauge range

Other technical indicators

• Signal input and impedance: The voltage and current are all floating inputs, with a voltage input impedance of about 1 MΩ and a current input impedance of about 4mΩ.

• Maximum peak value of measurement signal: 1.6 times of the maximum range of voltage and current.

• Sampling rate: 8000 times/s, sampling period of about 125μS, 24 bits, voltage and current sampling at the same time.

• Zero calibration mode: automatic zero calibration when the machine is turned on

• Line filtering: fixed at 2kHz

• Data update: The data calculation period can be set from 0.05 seconds ~ 1 second.

• Display: 7 windows LED display.

• Power consumption: <10VA.

• Gauge weight: approx. 3.5 kg.

• Maximum gauge dimensions: width× height×depth (223.5×151.5×384).

• Gauge cut-out size: width × height (209x128).

Safety requirements

• Insulation resistance: The insulation resistance between the measuring terminal and the instrument housing is not less than 5MΩ;

• Voltage resistance: 2000V 50Hz sine wave voltage between the measuring terminal and the instrument shell;

Working environment

• 温度：(0～40)℃;       

• 湿度：(20%～75%)RH;         

• 大气压力: (86～106)kPa;

• 仪表工作电源：AC 100V～240V  50/60Hz  无较重的振动及电磁干扰;

• 以上技术参数的说明中所用到的术语定义请参见GB/T 13978-2008 《数字多用表通用技术条件》。