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SA9603C Datasheet(PDF) 11 Page - Sames |
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SA9603C Datasheet(HTML) 11 Page - Sames |
11 / 18 page SA9603C sames 11/18 8. Calibration For calibration of the SA9603C, the following procedure is recommended: a. Establish the calibration factor for active energy (Ka) at power factor (PF) close to 1. Active (Measured) = register_value (Active) * Ka. 1 b. The factor for reactive (Kr) is typically Ka * PI/2. For higher accuracy of Kr, establish Kr at PF close to 0. Reactive (Measured) = register_value (Reactive) * Kr 2 c. At PF close to 1, establish error for reactive (Er) Er = (Reactive (Measured) - Reactive (True)) / Active (Measured) 3 Reactive (Corrected) = Reactive (Measured) - Er * Active (Measured) 3b Measurement Having determined the scaling factors (Ka & Kr) and error correction constant (Er) the measurement cycle consists of the following steps: Step 1 Read active register Step 2 Calculate Active (Measured) as per 1 Active energy Step 3 Read reactive register Step 4 Calculate Reactive (Measured) as per 2 Step 5 Perform error correction Calculate Reactive (Corrected) as per 3b Reactive energy The above five steps must be performed for each measurement cycle. ∨∨∨∨∨ ∨∨∨∨∨ ∨∨∨∨∨ ∨∨∨∨∨ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ |
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