Datasheet

71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
AUGUST 2011
Page: 76 of 104 © 2005-2011 Teridian Semiconductor Corporation
A Maxim Integrated Products Brand
CE Calibration Parameters
The table below lists the parameters that are typically entered to effect calibration of meter accuracy.
CE
Address
Name Default Description
0x08 CAL_IA 16384
These constants control the gain of their respective channels. The nominal
value for each parameter is 2
14
= 16384. The gain of each channel is directly
proportional to its CAL parameter. Thus, if the gain of a channel is 1% slow,
CAL should be increased by 1%.
0x09 CAL_VA 16384
0x0A CAL_IB 16384
0x0B
CAL_VB
16384
0x0C
CAL_IC
16384
0x0D CAL_VC 16384
0x65
CAL_V3
8192
Gain control for V3 channel, used for neutral current measurement.
0x0E PHADJ_A 0
These three constants control the CT phase compensation. No compensation
occurs when PHADJ_X = 0. As PHADJ_X
is increased, more compensation
(lag) is introduced. Range: ±2
15
–
1. If it is desired to delay the current by the
angle Φ:
Φ⋅−
Φ⋅
=
TAN
TAN
XPHADJ
0131.01487.0
02229.0
2_
20
at 60Hz
Φ⋅−
Φ⋅
=
TAN
TAN
XPHADJ
009695.01241.0
0155.0
2_
20
at 50Hz
0x0F PHADJ_B 0
0x10 PHADJ_C 0
0x11 TEMP_NOM N/A
During calibration, the value of TEMP_RAW_X should be placed in
TEMP_NOM.