Precision Power Calibration System

Precision Power Calibration System < 10 x 10-6 w.r.t apparent at frequencies from 40 Hz to 70 Hz.   The PPCS is based on the.. ZERA Product #: Power Calibration System based on 0 Reviews 2 - 3 Days

Precision Power Calibration System


Precision Power Calibration System
Brand: ZERA
Product Code: Power Calibration System
Call for Price: +202 333 84 831

< 10 x 10-6 w.r.t apparent at frequencies from 40 Hz to 70 Hz.
 
The PPCS is based on the research work carried out by the team of scientists from PTB Braunschweig, Germany and tested for several years to ensure technical claims.

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Individual Compenents

Control

PPSS - The especially developed Precision Power Sampling System is a Windows based software and controls the PPCS.
The software is able to control the device under calibration (e.g. C12, K2005, K2006, KOM100.1, KOM200.3, COM1000, COM1003, COM3000, COM3003, COM303-3, RMM3000, EPZ303, ILM03, LMG95, JEMIC-devices, Agilent 53131A) and calculate the error and measurement uncertainty (standard deviation). The result will be stored in the pc.

Calibration periods required:

  • Converter every 5 years
  • Resistors every year
  • Multi-meter every 90 days (for highest accuracy every 24 hours)

The inherent errors of the individual components determined during the re-calibration can be used for fault compensation in the operating program

Measuring Principle

The measuring principle is based on synthesized AC voltage and current generation  using single sampling voltmeter for synchronization and computerized evaluation by means of discrete Fourier transform (DFT). PC software communicates with the frequency generator (FG115) which consists a dual voltage programmable amplifier. Signals pass on to voltage and current amplifiers (based on linear amplifier technology) through antialiasing filter  FE101. The feedback measurement of the voltage output is performed via inductive divider (SVT480-120); current output is measured by precision current transformer (SCT100-120) and high precision resistor (HPR10). Both values are detected by FG115 for corrective action.

 

 

Values measured by the device under test are read out via interface. The user software compares the generated value and the values received from the device under test and shows the errors. Further traceability to the SI units "DC voltage" and "DC resistance" are achieved by using RMS voltmeter and AC precision resistor with small and known frequency responses. The  use of single clock signal for generation and measurement synchronization ensures the great reduction in measurement uncertainty. This clock signal f clock is taken from the sampling voltmeter.

These measures lead to a significant reduction of

  1. synchronization errors with sampling method and
  2. unavoidable difference between sampling voltmeters.
  • Highly accurate current, voltage and power calibration
  • High measuring stability due to ZERA components that have been proven for many years
  • High repeat accuracy of the measuring values

 

 

  • Lowest measuring uncertainty from 10 x 10-6 (relative to the nominal value of the apparent power)
  • Simple traceability to SI unit DC voltage & AC resistor of national reference standards
  • Wide range of Harmonic generation & accurate measurement