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JW****1C
AC and DC Electrical Instrument Calibration Device
                        
1 General
    This instrument is an integrated three phase 0.*5 grade device designed according to JJG*******5 Verification Regulation of Ammeters, Voltmeters, Wattmeters and Ohmmeters。The core technique of meter embedded in this instrument is a high precision industrial frequency AC collector combined by digital signal processor (DSP) and *6 digits high speed A/D converter. The signal part of the source is also the controllable sine wave and harmonic wave signal source combined by DSP and *6 digits high speed D/A converter.
 
Using a 6.5 inch TFT color LCD screen, character display clear chart. Device has the advantages of high precision, stable and reliable work, convenient operation and flexible features such as.
 
2 Main functions & features
Automatic or manual inspection in power system, various frequency meter ( voltage meter, current meter, power meter, frequency meter, power factor meter, phase meter ), single phase AC electric energy meter ( options ), three-phase AC electric energy meter ( options ) and DC voltage current meter fundamental error.
In the measurement of AC voltage, current, active power, its accuracy is 0.*5 level; because the device is provided with a higher *0KHz working frequency digital to frequency converter ( DFC ) and a plurality of the current range, so the measurement of electrical energy accuracy can also guarantee for grade 0.*5.
This instrument can generate harmonic wave with 2~*1 order, and it is can be program-controlled that the quantity and times of the harmonic wave, and the phase angle of the harmonic wave vs. fundamental wave.
 
Equipped with USB interface, this instrument can automatically or manually calibrate via upper computer software (optional part), and can process and manage the calibration data.
 
Equipped with a high capacity nonvolatile memory, this instrument can save over **0 meters original calibration data for review and upload.
With frequency range of *0Hz～1kHz, the power amplifier has fine linearity; The current amplifier is a constant-current source and the voltage amplifier is also a constant-voltage source.
 
3 Main Technique specification