MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 66

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

MCP3909 3-Phase Energy Meter Reference Design
DS51643B-page 62
6.8.3
The next step will be to calibrate the active power offset of the meter, if desired. The
default value for this calibration step is 1% of the ICAL current that was used for steps
1 and 2. The user can enter the exact value in the dialog box for more accurate meter
calibration.
FIGURE 6-5:
minimum current for active power offset calibration (in Amperes).
Section 5.3.9 describes the registers and equations that the software uses at this point
to calibrate the active power offset correction of the meter and PHy_OFF register for
the appropriate phase.
Calibration Step 3 - Configuration C3
Calibration Step C3 with calibration settings input boxes for the
© 2008 Microchip Technology Inc.