La description

JW－***6
1 General
    This instrument is an integrated single phase 0.1 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.
This instrument has the feature of high precision, reliable stability and easy operation.
 
2 Main functions & features    
l  This instrument offers an automatic or manual calibration to the basic errors for various kinds of industrial-frequency electric meter (voltmeter, ammeter,frequecymeter).
l  This instrument offers an automatic or manual calibration to the basic errors for various kinds of multimeter (including digital multimeter and pointer multimeter) of  0.5 grade.
l  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.
l  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.
l  Equipped with RS***2 interface, this instrument can automatically or manually calibrate via upper computer software (optional part), and can process and manage the calibration data.
l  Equipped with a high capacity nonvolatile memory, this instrument can save over **0 meters original calibration data for review and upload.
 
 
3 Main Technique specification