Microchip Technology ARD00330 データシート
Meter Calibration
© 2011 Microchip Technology Inc.
DS51964A-page 19
STAGE 2
During this stage, phase compensation will be computed at PF = 0.5 lag. Due to vari-
ous components in the board design, there may be a phase delay between the voltage
and the current.
1. To compensate for the phase delay, the meter line inputs are set at PF = 0.5 lag
During this stage, phase compensation will be computed at PF = 0.5 lag. Due to vari-
ous components in the board design, there may be a phase delay between the voltage
and the current.
1. To compensate for the phase delay, the meter line inputs are set at PF = 0.5 lag
and the active energy calibration pulse output is probed.
2. The Error % registered in the reference meter is entered as an input to Stage 2
calibration. Click Calibrate to initiate the phase compensation calibration as
shown in Figure 2-4.
shown in Figure 2-4.
3. After completion of the process, the meter active energy pulse output is probed
and the Error % is recorded. To confirm accurate phase compensation, the active
energy at various PF can be checked, during which the accuracy must be within
the specification. If the meter output is within the specification, active energy
calibration Stage 2 can be stopped.
energy at various PF can be checked, during which the accuracy must be within
the specification. If the meter output is within the specification, active energy
calibration Stage 2 can be stopped.
FIGURE 2-4:
Active Energy Calibration Stage 2.