Calibration and Troubleshooting

Main Voltage and Current Calibration Principle

Understanding the Problem

Figure 6-1 illustrates two sources of analog programming error: gain error and offset error. Gain error is the departure from the ideal slope of the measured versus programmed line. Offset error is the magnitude of the measured value when the programmed value is zero.

For best results, the next recommended action is gain calibration for 90% of maximum value and offset calibration for 10% of maximum value. Perform gain calibration again.

l Idea

l a e R

Gain Error

 

Offset Error

 

 

 

 

 

 

Programmed Value

 

Figure 6-1Offset (Intercept) Error and Gain (Slope) Error

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M370078-01

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Xantrex Technology XG 850 manual Main Voltage and Current Calibration Principle, Understanding the Problem