AT73C500 Datasheet, PDF (20/28 Pages) ATMEL Corporation – Chip Set Solution for Watt-Hour Meters

The calibration data is transferred in the following sequence:
Byte
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
Calibration Coefficient
PC1
PC2
PC3
MCC
Not used
AGC1
AGC2
AGC3
RGC1
RGC2
RGC3
UGC1
UGC2
UGC3
STUPC
AOF1
AOF2
AOF3
ROF1
ROF2
ROF3
OFFMOD
Byte
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
Calibration Coefficient
PC1 back-up
PC2 back-up
PC3 back-up
MCC back-up
Not used
AGC1 back-up
AGC2 back-up
AGC3 back-up
RGC1 back-up
RGC2 back-up
RGC3 back-up
UGC1 back-up
UGC2 back-up
UGC3 back-up
STUPC back-up
AOF1 back-up
AOF2 back-up
AOF3 back-up
ROF1 back-up
ROF2 back-up
ROF3 back-up
OFFMOD back-up
The meaning of the calibration coefficient mnemonics are as follows:
Mnemonic
PC_N
MCC
AGC_N
RGC_N
UGC_N
STUPC
AOF_N
ROF_N
OFFMOD
Meaning
Phase calibration factor, phase N
Display pulse adjustment factor for active and reactive energy
Gain calibration factor for active power and energy calculation, phase N
Gain calibration factor for reactive power and energy calculation, phase N
Gain calibration factor for phase voltage, phase N
Starting current adjustment factor
Offset calibration factor for active power and energy calculation, phase N
Offset calibration factor for reactive power and energy calculation, phase N
Controls the use of offset factors
20
AT73C500