Microchip Technology ARD00330 データシート
PIC18F87J72 Single-Phase Energy Meter Calibration User’s Guide
DS51964A-page 18
© 2011 Microchip Technology Inc.
2.3.2.4
ACTIVE ENERGY CALIBRATION PROCEDURE
The active energy calibration (kWh) consists of two stages:
STAGE 1
During Stage 1, the active energy gain compensation gets computed at PF = 1.0 lag.
Depending on the type, value of voltage and current transducers, the value of gain
compensation varies to measure the standard value of energy.
1. At PF = 1.0, the active energy calibration pulse output is probed. The Error % is
STAGE 1
During Stage 1, the active energy gain compensation gets computed at PF = 1.0 lag.
Depending on the type, value of voltage and current transducers, the value of gain
compensation varies to measure the standard value of energy.
1. At PF = 1.0, the active energy calibration pulse output is probed. The Error % is
entered into the Stage 1 calibration software, as shown in Figure 2-3.
2. Click Calibrate to proceed with the calibration. During this stage, the gain of the
active energy will be calibrated.
3. After completion of the process, the active energy pulse output is probed and the
Error % is recorded. If the meter output is within the specification, the active
energy calibration Stage 1 can be stopped.
energy calibration Stage 1 can be stopped.
FIGURE 2-3:
Active Energy Calibration Stage 1.