Accuracy dropped after STU replacement

Accuracy dropped after STU replacement

If the STU is replaced outside the factory, the measurement accuracy of the STU may decrease, as shown in the table below.

 

　

　

OCR

STU

　

　

P/S

N

A

P/S

Factory Calibration

Current

6%

-

0.5%

0.5%

Voltage

3%

-

-

0.5%

Power

10%

-

-

CLASS 1.0

Calibration
data applied to the new STU

Current

6%

-

2%

2%

Voltage

3%

-

-

2%　

Power

10%

-

-

5%　

No Calibration
data applied to the new STU

Current

6%

-

6%

6%

Voltage

3%

-

-

3%

Power

10%

-

-

10%